Java程序
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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server.am;
import static android.app.ActivityManager.StackId.DOCKED_STACK_ID;
import static android.app.ActivityManager.StackId.FREEFORM_WORKSPACE_STACK_ID;
import static android.app.ActivityManager.StackId.FULLSCREEN_WORKSPACE_STACK_ID;
import static android.app.ActivityManager.StackId.HOME_STACK_ID;
import static android.app.ActivityManager.StackId.INVALID_STACK_ID;
import static android.app.ActivityManager.StackId.PINNED_STACK_ID;
import static android.content.pm.ActivityInfo.CONFIG_ORIENTATION;
import static android.content.pm.ActivityInfo.CONFIG_SCREEN_LAYOUT;
import static android.content.pm.ActivityInfo.CONFIG_SCREEN_SIZE;
import static android.content.pm.ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE;
import static android.content.pm.ActivityInfo.FLAG_RESUME_WHILE_PAUSING;
import static android.content.pm.ActivityInfo.FLAG_SHOW_FOR_ALL_USERS;
import static android.content.res.Configuration.SCREENLAYOUT_UNDEFINED;
import static android.view.Display.DEFAULT_DISPLAY;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_ADD_REMOVE;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_ALL;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_APP;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_CLEANUP;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_CONFIGURATION;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_CONTAINERS;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_LOCKSCREEN;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_PAUSE;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_RELEASE;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_RESULTS;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_SAVED_STATE;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_SCREENSHOTS;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_STACK;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_STATES;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_SWITCH;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_TASKS;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_TRANSITION;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_USER_LEAVING;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_VISIBILITY;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_ADD_REMOVE;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_APP;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_CLEANUP;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_CONFIGURATION;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_CONTAINERS;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_PAUSE;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_RELEASE;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_RESULTS;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_SAVED_STATE;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_SCREENSHOTS;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_STACK;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_STATES;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_SWITCH;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_TASKS;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_TRANSITION;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_USER_LEAVING;
import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_VISIBILITY;
import static com.android.server.am.ActivityManagerDebugConfig.TAG_AM;
import static com.android.server.am.ActivityManagerDebugConfig.TAG_WITH_CLASS_NAME;
import static com.android.server.am.ActivityManagerService.LOCK_SCREEN_SHOWN;
import static com.android.server.am.ActivityManagerService.TAKE_FULLSCREEN_SCREENSHOTS;
import static com.android.server.am.ActivityRecord.APPLICATION_ACTIVITY_TYPE;
import static com.android.server.am.ActivityRecord.HOME_ACTIVITY_TYPE;
import static com.android.server.am.ActivityRecord.STARTING_WINDOW_REMOVED;
import static com.android.server.am.ActivityRecord.STARTING_WINDOW_SHOWN;
import static com.android.server.am.ActivityStackSupervisor.FindTaskResult;
import static com.android.server.am.ActivityStackSupervisor.ON_TOP;
import static com.android.server.am.ActivityStackSupervisor.PRESERVE_WINDOWS;
import static com.android.server.wm.AppTransition.TRANSIT_ACTIVITY_CLOSE;
import static com.android.server.wm.AppTransition.TRANSIT_ACTIVITY_OPEN;
import static com.android.server.wm.AppTransition.TRANSIT_NONE;
import static com.android.server.wm.AppTransition.TRANSIT_TASK_CLOSE;
import static com.android.server.wm.AppTransition.TRANSIT_TASK_OPEN;
import static com.android.server.wm.AppTransition.TRANSIT_TASK_OPEN_BEHIND;
import static com.android.server.wm.AppTransition.TRANSIT_TASK_TO_BACK;
import static com.android.server.wm.AppTransition.TRANSIT_TASK_TO_FRONT;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManager.RunningTaskInfo;
import android.app.ActivityManager.StackId;
import android.app.ActivityOptions;
import android.app.AppGlobals;
import android.app.IActivityController;
import android.app.ResultInfo;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.ApplicationInfo;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.Point;
import android.graphics.Rect;
import android.net.Uri;
import android.os.Binder;
import android.os.Bundle;
import android.os.Debug;
import android.os.Handler;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
import android.os.PersistableBundle;
import android.os.RemoteException;
import android.os.SystemClock;
import android.os.Trace;
import android.os.UserHandle;
import android.service.voice.IVoiceInteractionSession;
import android.util.ArraySet;
import android.util.EventLog;
import android.util.Log;
import android.util.Slog;
import android.view.Display;
import com.android.internal.app.IVoiceInteractor;
import com.android.internal.content.ReferrerIntent;
import com.android.internal.os.BatteryStatsImpl;
import com.android.server.Watchdog;
import com.android.server.am.ActivityManagerService.ItemMatcher;
import com.android.server.am.ActivityStackSupervisor.ActivityContainer;
import com.android.server.wm.TaskGroup;
import com.android.server.wm.WindowManagerService;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Objects;
import java.util.Set;
/**
* State and management of a single stack of activities.
*/
final class ActivityStack {
private static final String TAG = TAG_WITH_CLASS_NAME ? "ActivityStack" : TAG_AM;
private static final String TAG_ADD_REMOVE = TAG + POSTFIX_ADD_REMOVE;
private static final String TAG_APP = TAG + POSTFIX_APP;
private static final String TAG_CLEANUP = TAG + POSTFIX_CLEANUP;
private static final String TAG_CONFIGURATION = TAG + POSTFIX_CONFIGURATION;
private static final String TAG_CONTAINERS = TAG + POSTFIX_CONTAINERS;
private static final String TAG_PAUSE = TAG + POSTFIX_PAUSE;
private static final String TAG_RELEASE = TAG + POSTFIX_RELEASE;
private static final String TAG_RESULTS = TAG + POSTFIX_RESULTS;
private static final String TAG_SAVED_STATE = TAG + POSTFIX_SAVED_STATE;
private static final String TAG_SCREENSHOTS = TAG + POSTFIX_SCREENSHOTS;
private static final String TAG_STACK = TAG + POSTFIX_STACK;
private static final String TAG_STATES = TAG + POSTFIX_STATES;
private static final String TAG_SWITCH = TAG + POSTFIX_SWITCH;
private static final String TAG_TASKS = TAG + POSTFIX_TASKS;
private static final String TAG_TRANSITION = TAG + POSTFIX_TRANSITION;
private static final String TAG_USER_LEAVING = TAG + POSTFIX_USER_LEAVING;
private static final String TAG_VISIBILITY = TAG + POSTFIX_VISIBILITY;
private static final boolean VALIDATE_TOKENS = false;
// Ticks during which we check progress while waiting for an app to launch.
static final int LAUNCH_TICK = 500;
// How long we wait until giving up on the last activity to pause. This
// is short because it directly impacts the responsiveness of starting the
// next activity.
static final int PAUSE_TIMEOUT = 500;
// How long we wait for the activity to tell us it has stopped before
// giving up. This is a good amount of time because we really need this
// from the application in order to get its saved state.
static final int STOP_TIMEOUT = 10 * 1000;
// How long we wait until giving up on an activity telling us it has
// finished destroying itself.
static final int DESTROY_TIMEOUT = 10 * 1000;
// How long until we reset a task when the user returns to it. Currently
// disabled.
static final long ACTIVITY_INACTIVE_RESET_TIME = 0;
// How long between activity launches that we consider safe to not warn
// the user about an unexpected activity being launched on top.
static final long START_WARN_TIME = 5 * 1000;
// Set to false to disable the preview that is shown while a new activity
// is being started.
static final boolean SHOW_APP_STARTING_PREVIEW = true;
// How long to wait for all background Activities to redraw following a call to
// convertToTranslucent().
static final long TRANSLUCENT_CONVERSION_TIMEOUT = 2000;
// How many activities have to be scheduled to stop to force a stop pass.
private static final int MAX_STOPPING_TO_FORCE = 3;
enum ActivityState {
INITIALIZING,
RESUMED,
PAUSING,
PAUSED,
STOPPING,
STOPPED,
FINISHING,
DESTROYING,
DESTROYED
}
// Stack is not considered visible.
static final int STACK_INVISIBLE = 0;
// Stack is considered visible
static final int STACK_VISIBLE = 1;
// Stack is considered visible, but only becuase it has activity that is visible behind other
// activities and there is a specific combination of stacks.
static final int STACK_VISIBLE_ACTIVITY_BEHIND = 2;
/* The various modes for the method {@link #removeTask}. */
// Task is being completely removed from all stacks in the system.
static final int REMOVE_TASK_MODE_DESTROYING = 0;
// Task is being removed from this stack so we can add it to another stack. In the case we are
// moving we don't want to perform some operations on the task like removing it from window
// manager or recents.
static final int REMOVE_TASK_MODE_MOVING = 1;
// Similar to {@link #REMOVE_TASK_MODE_MOVING} and the task will be added to the top of its new
// stack and the new stack will be on top of all stacks.
static final int REMOVE_TASK_MODE_MOVING_TO_TOP = 2;
final ActivityManagerService mService;
final WindowManagerService mWindowManager;
private final RecentTasks mRecentTasks;
/**
* The back history of all previous (and possibly still
* running) activities. It contains #TaskRecord objects.
*/
private final ArrayList<TaskRecord> mTaskHistory = new ArrayList<>();
/**
* Used for validating app tokens with window manager.
*/
final ArrayList<TaskGroup> mValidateAppTokens = new ArrayList<>();
/**
* List of running activities, sorted by recent usage.
* The first entry in the list is the least recently used.
* It contains HistoryRecord objects.
*/
final ArrayList<ActivityRecord> mLRUActivities = new ArrayList<>();
/**
* Animations that for the current transition have requested not to
* be considered for the transition animation.
*/
final ArrayList<ActivityRecord> mNoAnimActivities = new ArrayList<>();
/**
* When we are in the process of pausing an activity, before starting the
* next one, this variable holds the activity that is currently being paused.
*/
ActivityRecord mPausingActivity = null;
/**
* This is the last activity that we put into the paused state. This is
* used to determine if we need to do an activity transition while sleeping,
* when we normally hold the top activity paused.
*/
ActivityRecord mLastPausedActivity = null;
/**
* Activities that specify No History must be removed once the user navigates away from them.
* If the device goes to sleep with such an activity in the paused state then we save it here
* and finish it later if another activity replaces it on wakeup.
*/
ActivityRecord mLastNoHistoryActivity = null;
/**
* Current activity that is resumed, or null if there is none.
*/
ActivityRecord mResumedActivity = null;
/**
* This is the last activity that has been started. It is only used to
* identify when multiple activities are started at once so that the user
* can be warned they may not be in the activity they think they are.
*/
ActivityRecord mLastStartedActivity = null;
// The topmost Activity passed to convertToTranslucent(). When non-null it means we are
// waiting for all Activities in mUndrawnActivitiesBelowTopTranslucent to be removed as they
// are drawn. When the last member of mUndrawnActivitiesBelowTopTranslucent is removed the
// Activity in mTranslucentActivityWaiting is notified via
// Activity.onTranslucentConversionComplete(false). If a timeout occurs prior to the last
// background activity being drawn then the same call will be made with a true value.
ActivityRecord mTranslucentActivityWaiting = null;
private ArrayList<ActivityRecord> mUndrawnActivitiesBelowTopTranslucent = new ArrayList<>();
/**
* Set when we know we are going to be calling updateConfiguration()
* soon, so want to skip intermediate config checks.
*/
boolean mConfigWillChange;
// Whether or not this stack covers the entire screen; by default stacks are fullscreen
boolean mFullscreen = true;
// Current bounds of the stack or null if fullscreen.
Rect mBounds = null;
boolean mUpdateBoundsDeferred;
boolean mUpdateBoundsDeferredCalled;
final Rect mDeferredBounds = new Rect();
final Rect mDeferredTaskBounds = new Rect();
final Rect mDeferredTaskInsetBounds = new Rect();
long mLaunchStartTime = 0;
long mFullyDrawnStartTime = 0;
int mCurrentUser;
final int mStackId;
final ActivityContainer mActivityContainer;
/** The other stacks, in order, on the attached display. Updated at attach/detach time. */
ArrayList<ActivityStack> mStacks;
/** The attached Display's unique identifier, or -1 if detached */
int mDisplayId;
/** Run all ActivityStacks through this */
final ActivityStackSupervisor mStackSupervisor;
private final LaunchingTaskPositioner mTaskPositioner;
static final int PAUSE_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 1;
static final int DESTROY_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 2;
static final int LAUNCH_TICK_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 3;
static final int STOP_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 4;
static final int DESTROY_ACTIVITIES_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 5;
static final int TRANSLUCENT_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 6;
static final int RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG =
ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 7;
static class ScheduleDestroyArgs {
final ProcessRecord mOwner;
final String mReason;
ScheduleDestroyArgs(ProcessRecord owner, String reason) {
mOwner = owner;
mReason = reason;
}
}
final Handler mHandler;
final class ActivityStackHandler extends Handler {
ActivityStackHandler(Looper looper) {
super(looper);
}
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case PAUSE_TIMEOUT_MSG: {
ActivityRecord r = (ActivityRecord)msg.obj;
// We don't at this point know if the activity is fullscreen,
// so we need to be conservative and assume it isn't.
Slog.w(TAG, "Activity pause timeout for " + r);
synchronized (mService) {
if (r.app != null) {
mService.logAppTooSlow(r.app, r.pauseTime, "pausing " + r);
}
activityPausedLocked(r.appToken, true);
}
} break;
case LAUNCH_TICK_MSG: {
ActivityRecord r = (ActivityRecord)msg.obj;
synchronized (mService) {
if (r.continueLaunchTickingLocked()) {
mService.logAppTooSlow(r.app, r.launchTickTime, "launching " + r);
}
}
} break;
case DESTROY_TIMEOUT_MSG: {
ActivityRecord r = (ActivityRecord)msg.obj;
// We don't at this point know if the activity is fullscreen,
// so we need to be conservative and assume it isn't.
Slog.w(TAG, "Activity destroy timeout for " + r);
synchronized (mService) {
activityDestroyedLocked(r != null ? r.appToken : null, "destroyTimeout");
}
} break;
case STOP_TIMEOUT_MSG: {
ActivityRecord r = (ActivityRecord)msg.obj;
// We don't at this point know if the activity is fullscreen,
// so we need to be conservative and assume it isn't.
Slog.w(TAG, "Activity stop timeout for " + r);
synchronized (mService) {
if (r.isInHistory()) {
activityStoppedLocked(r, null, null, null);
}
}
} break;
case DESTROY_ACTIVITIES_MSG: {
ScheduleDestroyArgs args = (ScheduleDestroyArgs)msg.obj;
synchronized (mService) {
destroyActivitiesLocked(args.mOwner, args.mReason);
}
} break;
case TRANSLUCENT_TIMEOUT_MSG: {
synchronized (mService) {
notifyActivityDrawnLocked(null);
}
} break;
case RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG: {
synchronized (mService) {
final ActivityRecord r = getVisibleBehindActivity();
Slog.e(TAG, "Timeout waiting for cancelVisibleBehind player=" + r);
if (r != null) {
mService.killAppAtUsersRequest(r.app, null);
}
}
} break;
}
}
}
int numActivities() {
int count = 0;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
count += mTaskHistory.get(taskNdx).mActivities.size();
}
return count;
}
ActivityStack(ActivityStackSupervisor.ActivityContainer activityContainer,
RecentTasks recentTasks) {
mActivityContainer = activityContainer;
mStackSupervisor = activityContainer.getOuter();
mService = mStackSupervisor.mService;
mHandler = new ActivityStackHandler(mService.mHandler.getLooper());
mWindowManager = mService.mWindowManager;
mStackId = activityContainer.mStackId;
mCurrentUser = mService.mUserController.getCurrentUserIdLocked();
mRecentTasks = recentTasks;
mTaskPositioner = mStackId == FREEFORM_WORKSPACE_STACK_ID
? new LaunchingTaskPositioner() : null;
}
void attachDisplay(ActivityStackSupervisor.ActivityDisplay activityDisplay, boolean onTop) {
mDisplayId = activityDisplay.mDisplayId;
mStacks = activityDisplay.mStacks;
mBounds = mWindowManager.attachStack(mStackId, activityDisplay.mDisplayId, onTop);
mFullscreen = mBounds == null;
if (mTaskPositioner != null) {
mTaskPositioner.setDisplay(activityDisplay.mDisplay);
mTaskPositioner.configure(mBounds);
}
if (mStackId == DOCKED_STACK_ID) {
// If we created a docked stack we want to resize it so it resizes all other stacks
// in the system.
mStackSupervisor.resizeDockedStackLocked(
mBounds, null, null, null, null, PRESERVE_WINDOWS);
}
}
void detachDisplay() {
mDisplayId = Display.INVALID_DISPLAY;
mStacks = null;
if (mTaskPositioner != null) {
mTaskPositioner.reset();
}
mWindowManager.detachStack(mStackId);
if (mStackId == DOCKED_STACK_ID) {
// If we removed a docked stack we want to resize it so it resizes all other stacks
// in the system to fullscreen.
mStackSupervisor.resizeDockedStackLocked(
null, null, null, null, null, PRESERVE_WINDOWS);
}
}
public void getDisplaySize(Point out) {
mActivityContainer.mActivityDisplay.mDisplay.getSize(out);
}
/**
* Defers updating the bounds of the stack. If the stack was resized/repositioned while
* deferring, the bounds will update in {@link #continueUpdateBounds()}.
*/
void deferUpdateBounds() {
if (!mUpdateBoundsDeferred) {
mUpdateBoundsDeferred = true;
mUpdateBoundsDeferredCalled = false;
}
}
/**
* Continues updating bounds after updates have been deferred. If there was a resize attempt
* between {@link #deferUpdateBounds()} and {@link #continueUpdateBounds()}, the stack will
* be resized to that bounds.
*/
void continueUpdateBounds() {
final boolean wasDeferred = mUpdateBoundsDeferred;
mUpdateBoundsDeferred = false;
if (wasDeferred && mUpdateBoundsDeferredCalled) {
mStackSupervisor.resizeStackUncheckedLocked(this,
mDeferredBounds.isEmpty() ? null : mDeferredBounds,
mDeferredTaskBounds.isEmpty() ? null : mDeferredTaskBounds,
mDeferredTaskInsetBounds.isEmpty() ? null : mDeferredTaskInsetBounds);
}
}
boolean updateBoundsAllowed(Rect bounds, Rect tempTaskBounds,
Rect tempTaskInsetBounds) {
if (!mUpdateBoundsDeferred) {
return true;
}
if (bounds != null) {
mDeferredBounds.set(bounds);
} else {
mDeferredBounds.setEmpty();
}
if (tempTaskBounds != null) {
mDeferredTaskBounds.set(tempTaskBounds);
} else {
mDeferredTaskBounds.setEmpty();
}
if (tempTaskInsetBounds != null) {
mDeferredTaskInsetBounds.set(tempTaskInsetBounds);
} else {
mDeferredTaskInsetBounds.setEmpty();
}
mUpdateBoundsDeferredCalled = true;
return false;
}
void setBounds(Rect bounds) {
mBounds = mFullscreen ? null : new Rect(bounds);
if (mTaskPositioner != null) {
mTaskPositioner.configure(bounds);
}
}
boolean okToShowLocked(ActivityRecord r) {
return mStackSupervisor.okToShowLocked(r);
}
final ActivityRecord topRunningActivityLocked() {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
ActivityRecord r = mTaskHistory.get(taskNdx).topRunningActivityLocked();
if (r != null) {
return r;
}
}
return null;
}
final ActivityRecord topRunningNonDelayedActivityLocked(ActivityRecord notTop) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
final ArrayList<ActivityRecord> activities = task.mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
ActivityRecord r = activities.get(activityNdx);
if (!r.finishing && !r.delayedResume && r != notTop && okToShowLocked(r)) {
return r;
}
}
}
return null;
}
/**
* This is a simplified version of topRunningActivityLocked that provides a number of
* optional skip-over modes. It is intended for use with the ActivityController hook only.
*
* @param token If non-null, any history records matching this token will be skipped.
* @param taskId If non-zero, we'll attempt to skip over records with the same task ID.
*
* @return Returns the HistoryRecord of the next activity on the stack.
*/
final ActivityRecord topRunningActivityLocked(IBinder token, int taskId) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
TaskRecord task = mTaskHistory.get(taskNdx);
if (task.taskId == taskId) {
continue;
}
ArrayList<ActivityRecord> activities = task.mActivities;
for (int i = activities.size() - 1; i >= 0; --i) {
final ActivityRecord r = activities.get(i);
// Note: the taskId check depends on real taskId fields being non-zero
if (!r.finishing && (token != r.appToken) && okToShowLocked(r)) {
return r;
}
}
}
return null;
}
final ActivityRecord topActivity() {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if (!r.finishing) {
return r;
}
}
}
return null;
}
final TaskRecord topTask() {
final int size = mTaskHistory.size();
if (size > 0) {
return mTaskHistory.get(size - 1);
}
return null;
}
TaskRecord taskForIdLocked(int id) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
if (task.taskId == id) {
return task;
}
}
return null;
}
ActivityRecord isInStackLocked(IBinder token) {
final ActivityRecord r = ActivityRecord.forTokenLocked(token);
return isInStackLocked(r);
}
ActivityRecord isInStackLocked(ActivityRecord r) {
if (r == null) {
return null;
}
final TaskRecord task = r.task;
if (task != null && task.stack != null
&& task.mActivities.contains(r) && mTaskHistory.contains(task)) {
if (task.stack != this) Slog.w(TAG,
"Illegal state! task does not point to stack it is in.");
return r;
}
return null;
}
final boolean updateLRUListLocked(ActivityRecord r) {
final boolean hadit = mLRUActivities.remove(r);
mLRUActivities.add(r);
return hadit;
}
final boolean isHomeStack() {
return mStackId == HOME_STACK_ID;
}
final boolean isDockedStack() {
return mStackId == DOCKED_STACK_ID;
}
final boolean isPinnedStack() {
return mStackId == PINNED_STACK_ID;
}
final boolean isOnHomeDisplay() {
return isAttached() &&
mActivityContainer.mActivityDisplay.mDisplayId == DEFAULT_DISPLAY;
}
void moveToFront(String reason) {
moveToFront(reason, null);
}
/**
* @param reason The reason for moving the stack to the front.
* @param task If non-null, the task will be moved to the top of the stack.
* */
void moveToFront(String reason, TaskRecord task) {
if (!isAttached()) {
return;
}
mStacks.remove(this);
int addIndex = mStacks.size();
if (addIndex > 0) {
final ActivityStack topStack = mStacks.get(addIndex - 1);
if (StackId.isAlwaysOnTop(topStack.mStackId) && topStack != this) {
// If the top stack is always on top, we move this stack just below it.
addIndex--;
}
}
mStacks.add(addIndex, this);
// TODO(multi-display): Needs to also work if focus is moving to the non-home display.
if (isOnHomeDisplay()) {
mStackSupervisor.setFocusStackUnchecked(reason, this);
}
if (task != null) {
insertTaskAtTop(task, null);
} else {
task = topTask();
}
if (task != null) {
mWindowManager.moveTaskToTop(task.taskId);
}
}
boolean isFocusable() {
if (StackId.canReceiveKeys(mStackId)) {
return true;
}
// The stack isn't focusable. See if its top activity is focusable to force focus on the
// stack.
final ActivityRecord r = topRunningActivityLocked();
return r != null && r.isFocusable();
}
final boolean isAttached() {
return mStacks != null;
}
/**
* Returns the top activity in any existing task matching the given Intent in the input result.
* Returns null if no such task is found.
*/
void findTaskLocked(ActivityRecord target, FindTaskResult result) {
Intent intent = target.intent;
ActivityInfo info = target.info;
ComponentName cls = intent.getComponent();
if (info.targetActivity != null) {
cls = new ComponentName(info.packageName, info.targetActivity);
}
final int userId = UserHandle.getUserId(info.applicationInfo.uid);
boolean isDocument = intent != null & intent.isDocument();
// If documentData is non-null then it must match the existing task data.
Uri documentData = isDocument ? intent.getData() : null;
if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Looking for task of " + target + " in " + this);
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
if (task.voiceSession != null) {
// We never match voice sessions; those always run independently.
if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": voice session");
continue;
}
if (task.userId != userId) {
// Looking for a different task.
if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": different user");
continue;
}
final ActivityRecord r = task.getTopActivity();
if (r == null || r.finishing || r.userId != userId ||
r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) {
if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": mismatch root " + r);
continue;
}
if (r.mActivityType != target.mActivityType) {
if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": mismatch activity type");
continue;
}
final Intent taskIntent = task.intent;
final Intent affinityIntent = task.affinityIntent;
final boolean taskIsDocument;
final Uri taskDocumentData;
if (taskIntent != null && taskIntent.isDocument()) {
taskIsDocument = true;
taskDocumentData = taskIntent.getData();
} else if (affinityIntent != null && affinityIntent.isDocument()) {
taskIsDocument = true;
taskDocumentData = affinityIntent.getData();
} else {
taskIsDocument = false;
taskDocumentData = null;
}
if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Comparing existing cls="
+ taskIntent.getComponent().flattenToShortString()
+ "/aff=" + r.task.rootAffinity + " to new cls="
+ intent.getComponent().flattenToShortString() + "/aff=" + info.taskAffinity);
// TODO Refactor to remove duplications. Check if logic can be simplified.
if (taskIntent != null && taskIntent.getComponent() != null &&
taskIntent.getComponent().compareTo(cls) == 0 &&
Objects.equals(documentData, taskDocumentData)) {
if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Found matching class!");
//dump();
if (DEBUG_TASKS) Slog.d(TAG_TASKS,
"For Intent " + intent + " bringing to top: " + r.intent);
result.r = r;
result.matchedByRootAffinity = false;
break;
} else if (affinityIntent != null && affinityIntent.getComponent() != null &&
affinityIntent.getComponent().compareTo(cls) == 0 &&
Objects.equals(documentData, taskDocumentData)) {
if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Found matching class!");
//dump();
if (DEBUG_TASKS) Slog.d(TAG_TASKS,
"For Intent " + intent + " bringing to top: " + r.intent);
result.r = r;
result.matchedByRootAffinity = false;
break;
} else if (!isDocument && !taskIsDocument
&& result.r == null && task.canMatchRootAffinity()) {
if (task.rootAffinity.equals(target.taskAffinity)) {
if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Found matching affinity candidate!");
// It is possible for multiple tasks to have the same root affinity especially
// if they are in separate stacks. We save off this candidate, but keep looking
// to see if there is a better candidate.
result.r = r;
result.matchedByRootAffinity = true;
}
} else if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Not a match: " + task);
}
}
/**
* Returns the first activity (starting from the top of the stack) that
* is the same as the given activity. Returns null if no such activity
* is found.
*/
ActivityRecord findActivityLocked(Intent intent, ActivityInfo info,
boolean compareIntentFilters) {
ComponentName cls = intent.getComponent();
if (info.targetActivity != null) {
cls = new ComponentName(info.packageName, info.targetActivity);
}
final int userId = UserHandle.getUserId(info.applicationInfo.uid);
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
final boolean notCurrentUserTask =
!mStackSupervisor.isCurrentProfileLocked(task.userId);
final ArrayList<ActivityRecord> activities = task.mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
ActivityRecord r = activities.get(activityNdx);
if (notCurrentUserTask && (r.info.flags & FLAG_SHOW_FOR_ALL_USERS) == 0) {
continue;
}
if (!r.finishing && r.userId == userId) {
if (compareIntentFilters) {
if (r.intent.filterEquals(intent)) {
return r;
}
} else {
if (r.intent.getComponent().equals(cls)) {
return r;
}
}
}
}
}
return null;
}
/*
* Move the activities around in the stack to bring a user to the foreground.
*/
final void switchUserLocked(int userId) {
if (mCurrentUser == userId) {
return;
}
mCurrentUser = userId;
// Move userId's tasks to the top.
int index = mTaskHistory.size();
for (int i = 0; i < index; ) {
final TaskRecord task = mTaskHistory.get(i);
// NOTE: If {@link TaskRecord#topRunningActivityLocked} return is not null then it is
// okay to show the activity when locked.
if (mStackSupervisor.isCurrentProfileLocked(task.userId)
|| task.topRunningActivityLocked() != null) {
if (DEBUG_TASKS) Slog.d(TAG_TASKS, "switchUserLocked: stack=" + getStackId() +
" moving " + task + " to top");
mTaskHistory.remove(i);
mTaskHistory.add(task);
--index;
// Use same value for i.
} else {
++i;
}
}
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
}
void minimalResumeActivityLocked(ActivityRecord r) {
r.state = ActivityState.RESUMED;
if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to RESUMED: " + r + " (starting new instance)"
+ " callers=" + Debug.getCallers(5));
mResumedActivity = r;
r.task.touchActiveTime();
mRecentTasks.addLocked(r.task);
completeResumeLocked(r);
mStackSupervisor.checkReadyForSleepLocked();
setLaunchTime(r);
if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE,
"Launch completed; removing icicle of " + r.icicle);
}
void addRecentActivityLocked(ActivityRecord r) {
if (r != null) {
mRecentTasks.addLocked(r.task);
r.task.touchActiveTime();
}
}
private void startLaunchTraces(String packageName) {
if (mFullyDrawnStartTime != 0) {
Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0);
}
Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "launching: " + packageName, 0);
Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0);
}
private void stopFullyDrawnTraceIfNeeded() {
if (mFullyDrawnStartTime != 0 && mLaunchStartTime == 0) {
Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0);
mFullyDrawnStartTime = 0;
}
}
void setLaunchTime(ActivityRecord r) {
if (r.displayStartTime == 0) {
r.fullyDrawnStartTime = r.displayStartTime = SystemClock.uptimeMillis();
if (mLaunchStartTime == 0) {
startLaunchTraces(r.packageName);
mLaunchStartTime = mFullyDrawnStartTime = r.displayStartTime;
}
} else if (mLaunchStartTime == 0) {
startLaunchTraces(r.packageName);
mLaunchStartTime = mFullyDrawnStartTime = SystemClock.uptimeMillis();
}
}
void clearLaunchTime(ActivityRecord r) {
// Make sure that there is no activity waiting for this to launch.
if (mStackSupervisor.mWaitingActivityLaunched.isEmpty()) {
r.displayStartTime = r.fullyDrawnStartTime = 0;
} else {
mStackSupervisor.removeTimeoutsForActivityLocked(r);
mStackSupervisor.scheduleIdleTimeoutLocked(r);
}
}
void awakeFromSleepingLocked() {
// Ensure activities are no longer sleeping.
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
activities.get(activityNdx).setSleeping(false);
}
}
if (mPausingActivity != null) {
Slog.d(TAG, "awakeFromSleepingLocked: previously pausing activity didn't pause");
activityPausedLocked(mPausingActivity.appToken, true);
}
}
void updateActivityApplicationInfoLocked(ApplicationInfo aInfo) {
final String packageName = aInfo.packageName;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final List<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
if (packageName.equals(activities.get(activityNdx).packageName)) {
activities.get(activityNdx).info.applicationInfo = aInfo;
}
}
}
}
/**
* @return true if something must be done before going to sleep.
*/
boolean checkReadyForSleepLocked() {
if (mResumedActivity != null) {
// Still have something resumed; can't sleep until it is paused.
if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Sleep needs to pause " + mResumedActivity);
if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING,
"Sleep => pause with userLeaving=false");
startPausingLocked(false, true, null, false);
return true;
}
if (mPausingActivity != null) {
// Still waiting for something to pause; can't sleep yet.
if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Sleep still waiting to pause " + mPausingActivity);
return true;
}
if (hasVisibleBehindActivity()) {
// Stop visible behind activity before going to sleep.
final ActivityRecord r = getVisibleBehindActivity();
mStackSupervisor.mStoppingActivities.add(r);
if (DEBUG_STATES) Slog.v(TAG_STATES, "Sleep still waiting to stop visible behind " + r);
return true;
}
return false;
}
void goToSleep() {
ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS);
// Make sure any paused or stopped but visible activities are now sleeping.
// This ensures that the activity's onStop() is called.
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if (r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED
|| r.state == ActivityState.PAUSED || r.state == ActivityState.PAUSING) {
r.setSleeping(true);
}
}
}
}
public final Bitmap screenshotActivitiesLocked(ActivityRecord who) {
if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "screenshotActivitiesLocked: " + who);
if (who.noDisplay) {
if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tNo display");
return null;
}
if (isHomeStack()) {
// This is an optimization -- since we never show Home or Recents within Recents itself,
// we can just go ahead and skip taking the screenshot if this is the home stack.
if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tHome stack");
return null;
}
int w = mService.mThumbnailWidth;
int h = mService.mThumbnailHeight;
if (w <= 0) {
Slog.e(TAG, "\tInvalid thumbnail dimensions: " + w + "x" + h);
return null;
}
if (mStackId == DOCKED_STACK_ID && mStackSupervisor.mIsDockMinimized) {
// When the docked stack is minimized its app windows are cropped significantly so any
// screenshot taken will not display the apps contain. So, we avoid taking a screenshot
// in that case.
if (DEBUG_SCREENSHOTS) Slog.e(TAG, "\tIn minimized docked stack");
return null;
}
float scale = 1f;
if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tTaking screenshot");
// When this flag is set, we currently take the fullscreen screenshot of the activity but
// scaled to half the size. This gives us a "good-enough" fullscreen thumbnail to use within
// SystemUI while keeping memory usage low.
if (TAKE_FULLSCREEN_SCREENSHOTS) {
w = h = -1;
scale = mService.mFullscreenThumbnailScale;
}
return mWindowManager.screenshotApplications(who.appToken, DEFAULT_DISPLAY, w, h, scale);
}
/**
* Start pausing the currently resumed activity. It is an error to call this if there
* is already an activity being paused or there is no resumed activity.
*
* @param userLeaving True if this should result in an onUserLeaving to the current activity.
* @param uiSleeping True if this is happening with the user interface going to sleep (the
* screen turning off).
* @param resuming The activity we are currently trying to resume or null if this is not being
* called as part of resuming the top activity, so we shouldn't try to instigate
* a resume here if not null.
* @param dontWait True if the caller does not want to wait for the pause to complete. If
* set to true, we will immediately complete the pause here before returning.
* @return Returns true if an activity now is in the PAUSING state, and we are waiting for
* it to tell us when it is done.
*/
final boolean startPausingLocked(boolean userLeaving, boolean uiSleeping,
ActivityRecord resuming, boolean dontWait) {
if (mPausingActivity != null) {
Slog.wtf(TAG, "Going to pause when pause is already pending for " + mPausingActivity
+ " state=" + mPausingActivity.state);
if (!mService.isSleepingLocked()) {
// Avoid recursion among check for sleep and complete pause during sleeping.
// Because activity will be paused immediately after resume, just let pause
// be completed by the order of activity paused from clients.
completePauseLocked(false, resuming);
}
}
ActivityRecord prev = mResumedActivity;
if (prev == null) {
if (resuming == null) {
Slog.wtf(TAG, "Trying to pause when nothing is resumed");
mStackSupervisor.resumeFocusedStackTopActivityLocked();
}
return false;
}
if (mActivityContainer.mParentActivity == null) {
// Top level stack, not a child. Look for child stacks.
mStackSupervisor.pauseChildStacks(prev, userLeaving, uiSleeping, resuming, dontWait);
}
if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to PAUSING: " + prev);
else if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Start pausing: " + prev);
mResumedActivity = null;
mPausingActivity = prev;
mLastPausedActivity = prev;
mLastNoHistoryActivity = (prev.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_HISTORY) != 0
|| (prev.info.flags & ActivityInfo.FLAG_NO_HISTORY) != 0 ? prev : null;
prev.state = ActivityState.PAUSING;
prev.task.touchActiveTime();
clearLaunchTime(prev);
final ActivityRecord next = mStackSupervisor.topRunningActivityLocked();
if (mService.mHasRecents
&& (next == null || next.noDisplay || next.task != prev.task || uiSleeping)) {
prev.mUpdateTaskThumbnailWhenHidden = true;
}
stopFullyDrawnTraceIfNeeded();
mService.updateCpuStats();
if (prev.app != null && prev.app.thread != null) {
if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Enqueueing pending pause: " + prev);
try {
EventLog.writeEvent(EventLogTags.AM_PAUSE_ACTIVITY,
prev.userId, System.identityHashCode(prev),
prev.shortComponentName);
mService.updateUsageStats(prev, false);
prev.app.thread.schedulePauseActivity(prev.appToken, prev.finishing,
userLeaving, prev.configChangeFlags, dontWait);
} catch (Exception e) {
// Ignore exception, if process died other code will cleanup.
Slog.w(TAG, "Exception thrown during pause", e);
mPausingActivity = null;
mLastPausedActivity = null;
mLastNoHistoryActivity = null;
}
} else {
mPausingActivity = null;
mLastPausedActivity = null;
mLastNoHistoryActivity = null;
}
// If we are not going to sleep, we want to ensure the device is
// awake until the next activity is started.
if (!uiSleeping && !mService.isSleepingOrShuttingDownLocked()) {
mStackSupervisor.acquireLaunchWakelock();
}
if (mPausingActivity != null) {
// Have the window manager pause its key dispatching until the new
// activity has started. If we're pausing the activity just because
// the screen is being turned off and the UI is sleeping, don't interrupt
// key dispatch; the same activity will pick it up again on wakeup.
if (!uiSleeping) {
prev.pauseKeyDispatchingLocked();
} else if (DEBUG_PAUSE) {
Slog.v(TAG_PAUSE, "Key dispatch not paused for screen off");
}
if (dontWait) {
// If the caller said they don't want to wait for the pause, then complete
// the pause now.
completePauseLocked(false, resuming);
return false;
} else {
// Schedule a pause timeout in case the app doesn't respond.
// We don't give it much time because this directly impacts the
// responsiveness seen by the user.
Message msg = mHandler.obtainMessage(PAUSE_TIMEOUT_MSG);
msg.obj = prev;
prev.pauseTime = SystemClock.uptimeMillis();
mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT);
if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Waiting for pause to complete...");
return true;
}
} else {
// This activity failed to schedule the
// pause, so just treat it as being paused now.
if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Activity not running, resuming next.");
if (resuming == null) {
mStackSupervisor.resumeFocusedStackTopActivityLocked();
}
return false;
}
}
final void activityPausedLocked(IBinder token, boolean timeout) {
if (DEBUG_PAUSE) Slog.v(TAG_PAUSE,
"Activity paused: token=" + token + ", timeout=" + timeout);
final ActivityRecord r = isInStackLocked(token);
if (r != null) {
mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r);
if (mPausingActivity == r) {
if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to PAUSED: " + r
+ (timeout ? " (due to timeout)" : " (pause complete)"));
completePauseLocked(true, null);
return;
} else {
EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE,
r.userId, System.identityHashCode(r), r.shortComponentName,
mPausingActivity != null
? mPausingActivity.shortComponentName : "(none)");
if (r.state == ActivityState.PAUSING) {
r.state = ActivityState.PAUSED;
if (r.finishing) {
if (DEBUG_PAUSE) Slog.v(TAG,
"Executing finish of failed to pause activity: " + r);
finishCurrentActivityLocked(r, FINISH_AFTER_VISIBLE, false);
}
}
}
}
mStackSupervisor.ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS);
}
final void activityResumedLocked(IBinder token) {
final ActivityRecord r = ActivityRecord.forTokenLocked(token);
if (DEBUG_SAVED_STATE) Slog.i(TAG_STATES, "Resumed activity; dropping state of: " + r);
r.icicle = null;
r.haveState = false;
}
final void activityStoppedLocked(ActivityRecord r, Bundle icicle,
PersistableBundle persistentState, CharSequence description) {
if (r.state != ActivityState.STOPPING) {
Slog.i(TAG, "Activity reported stop, but no longer stopping: " + r);
mHandler.removeMessages(STOP_TIMEOUT_MSG, r);
return;
}
if (persistentState != null) {
r.persistentState = persistentState;
mService.notifyTaskPersisterLocked(r.task, false);
}
if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, "Saving icicle of " + r + ": " + icicle);
if (icicle != null) {
// If icicle is null, this is happening due to a timeout, so we
// haven't really saved the state.
r.icicle = icicle;
r.haveState = true;
r.launchCount = 0;
r.updateThumbnailLocked(null, description);
}
if (!r.stopped) {
if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to STOPPED: " + r + " (stop complete)");
mHandler.removeMessages(STOP_TIMEOUT_MSG, r);
r.stopped = true;
r.state = ActivityState.STOPPED;
mWindowManager.notifyAppStopped(r.appToken);
if (getVisibleBehindActivity() == r) {
mStackSupervisor.requestVisibleBehindLocked(r, false);
}
if (r.finishing) {
r.clearOptionsLocked();
} else {
if (r.deferRelaunchUntilPaused) {
destroyActivityLocked(r, true, "stop-config");
mStackSupervisor.resumeFocusedStackTopActivityLocked();
} else {
mStackSupervisor.updatePreviousProcessLocked(r);
}
}
}
}
private void completePauseLocked(boolean resumeNext, ActivityRecord resuming) {
ActivityRecord prev = mPausingActivity;
if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Complete pause: " + prev);
if (prev != null) {
final boolean wasStopping = prev.state == ActivityState.STOPPING;
prev.state = ActivityState.PAUSED;
if (prev.finishing) {
if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Executing finish of activity: " + prev);
prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE, false);
} else if (prev.app != null) {
if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Enqueue pending stop if needed: " + prev
+ " wasStopping=" + wasStopping + " visible=" + prev.visible);
if (mStackSupervisor.mWaitingVisibleActivities.remove(prev)) {
if (DEBUG_SWITCH || DEBUG_PAUSE) Slog.v(TAG_PAUSE,
"Complete pause, no longer waiting: " + prev);
}
if (prev.deferRelaunchUntilPaused) {
// Complete the deferred relaunch that was waiting for pause to complete.
if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Re-launching after pause: " + prev);
relaunchActivityLocked(prev, prev.configChangeFlags, false,
prev.preserveWindowOnDeferredRelaunch);
} else if (wasStopping) {
// We are also stopping, the stop request must have gone soon after the pause.
// We can't clobber it, because the stop confirmation will not be handled.
// We don't need to schedule another stop, we only need to let it happen.
prev.state = ActivityState.STOPPING;
} else if ((!prev.visible && !hasVisibleBehindActivity())
|| mService.isSleepingOrShuttingDownLocked()) {
// If we were visible then resumeTopActivities will release resources before
// stopping.
addToStopping(prev, true /* immediate */);
}
} else {
if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "App died during pause, not stopping: " + prev);
prev = null;
}
// It is possible the activity was freezing the screen before it was paused.
// In that case go ahead and remove the freeze this activity has on the screen
// since it is no longer visible.
if (prev != null) {
prev.stopFreezingScreenLocked(true /*force*/);
}
mPausingActivity = null;
}
if (resumeNext) {
final ActivityStack topStack = mStackSupervisor.getFocusedStack();
if (!mService.isSleepingOrShuttingDownLocked()) {
mStackSupervisor.resumeFocusedStackTopActivityLocked(topStack, prev, null);
} else {
mStackSupervisor.checkReadyForSleepLocked();
ActivityRecord top = topStack.topRunningActivityLocked();
if (top == null || (prev != null && top != prev)) {
// If there are no more activities available to run, do resume anyway to start
// something. Also if the top activity on the stack is not the just paused
// activity, we need to go ahead and resume it to ensure we complete an
// in-flight app switch.
mStackSupervisor.resumeFocusedStackTopActivityLocked();
}
}
}
if (prev != null) {
prev.resumeKeyDispatchingLocked();
if (prev.app != null && prev.cpuTimeAtResume > 0
&& mService.mBatteryStatsService.isOnBattery()) {
long diff = mService.mProcessCpuTracker.getCpuTimeForPid(prev.app.pid)
- prev.cpuTimeAtResume;
if (diff > 0) {
BatteryStatsImpl bsi = mService.mBatteryStatsService.getActiveStatistics();
synchronized (bsi) {
BatteryStatsImpl.Uid.Proc ps =
bsi.getProcessStatsLocked(prev.info.applicationInfo.uid,
prev.info.packageName);
if (ps != null) {
ps.addForegroundTimeLocked(diff);
}
}
}
}
prev.cpuTimeAtResume = 0; // reset it
}
// Notify when the task stack has changed, but only if visibilities changed (not just
// focus). Also if there is an active pinned stack - we always want to notify it about
// task stack changes, because its positioning may depend on it.
if (mStackSupervisor.mAppVisibilitiesChangedSinceLastPause
|| mService.mStackSupervisor.getStack(PINNED_STACK_ID) != null) {
mService.notifyTaskStackChangedLocked();
mStackSupervisor.mAppVisibilitiesChangedSinceLastPause = false;
}
mStackSupervisor.ensureActivitiesVisibleLocked(resuming, 0, !PRESERVE_WINDOWS);
}
private void addToStopping(ActivityRecord r, boolean immediate) {
if (!mStackSupervisor.mStoppingActivities.contains(r)) {
mStackSupervisor.mStoppingActivities.add(r);
}
// If we already have a few activities waiting to stop, then give up
// on things going idle and start clearing them out. Or if r is the
// last of activity of the last task the stack will be empty and must
// be cleared immediately.
boolean forceIdle = mStackSupervisor.mStoppingActivities.size() > MAX_STOPPING_TO_FORCE
|| (r.frontOfTask && mTaskHistory.size() <= 1);
if (immediate || forceIdle) {
if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Scheduling idle now: forceIdle="
+ forceIdle + "immediate=" + immediate);
mStackSupervisor.scheduleIdleLocked();
} else {
mStackSupervisor.checkReadyForSleepLocked();
}
}
/**
* Once we know that we have asked an application to put an activity in
* the resumed state (either by launching it or explicitly telling it),
* this function updates the rest of our state to match that fact.
*/
private void completeResumeLocked(ActivityRecord next) {
next.visible = true;
next.idle = false;
next.results = null;
next.newIntents = null;
next.stopped = false;
if (next.isHomeActivity()) {
ProcessRecord app = next.task.mActivities.get(0).app;
if (app != null && app != mService.mHomeProcess) {
mService.mHomeProcess = app;
}
}
if (next.nowVisible) {
// We won't get a call to reportActivityVisibleLocked() so dismiss lockscreen now.
mStackSupervisor.reportActivityVisibleLocked(next);
mStackSupervisor.notifyActivityDrawnForKeyguard();
}
// schedule an idle timeout in case the app doesn't do it for us.
mStackSupervisor.scheduleIdleTimeoutLocked(next);
mStackSupervisor.reportResumedActivityLocked(next);
next.resumeKeyDispatchingLocked();
mNoAnimActivities.clear();
// Mark the point when the activity is resuming
// TODO: To be more accurate, the mark should be before the onCreate,
// not after the onResume. But for subsequent starts, onResume is fine.
if (next.app != null) {
next.cpuTimeAtResume = mService.mProcessCpuTracker.getCpuTimeForPid(next.app.pid);
} else {
next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process
}
next.returningOptions = null;
if (getVisibleBehindActivity() == next) {
// When resuming an activity, require it to call requestVisibleBehind() again.
setVisibleBehindActivity(null);
}
}
private void setVisible(ActivityRecord r, boolean visible) {
r.visible = visible;
if (!visible && r.mUpdateTaskThumbnailWhenHidden) {
r.updateThumbnailLocked(r.task.stack.screenshotActivitiesLocked(r), null);
r.mUpdateTaskThumbnailWhenHidden = false;
}
mWindowManager.setAppVisibility(r.appToken, visible);
final ArrayList<ActivityContainer> containers = r.mChildContainers;
for (int containerNdx = containers.size() - 1; containerNdx >= 0; --containerNdx) {
ActivityContainer container = containers.get(containerNdx);
container.setVisible(visible);
}
mStackSupervisor.mAppVisibilitiesChangedSinceLastPause = true;
}
// Find the first visible activity above the passed activity and if it is translucent return it
// otherwise return null;
ActivityRecord findNextTranslucentActivity(ActivityRecord r) {
TaskRecord task = r.task;
if (task == null) {
return null;
}
ActivityStack stack = task.stack;
if (stack == null) {
return null;
}
int stackNdx = mStacks.indexOf(stack);
ArrayList<TaskRecord> tasks = stack.mTaskHistory;
int taskNdx = tasks.indexOf(task);
ArrayList<ActivityRecord> activities = task.mActivities;
int activityNdx = activities.indexOf(r) + 1;
final int numStacks = mStacks.size();
while (stackNdx < numStacks) {
final ActivityStack historyStack = mStacks.get(stackNdx);
tasks = historyStack.mTaskHistory;
final int numTasks = tasks.size();
while (taskNdx < numTasks) {
final TaskRecord currentTask = tasks.get(taskNdx);
activities = currentTask.mActivities;
final int numActivities = activities.size();
while (activityNdx < numActivities) {
final ActivityRecord activity = activities.get(activityNdx);
if (!activity.finishing) {
return historyStack.mFullscreen
&& currentTask.mFullscreen && activity.fullscreen ? null : activity;
}
++activityNdx;
}
activityNdx = 0;
++taskNdx;
}
taskNdx = 0;
++stackNdx;
}
return null;
}
ActivityStack getNextFocusableStackLocked() {
ArrayList<ActivityStack> stacks = mStacks;
final ActivityRecord parent = mActivityContainer.mParentActivity;
if (parent != null) {
stacks = parent.task.stack.mStacks;
}
if (stacks != null) {
for (int i = stacks.size() - 1; i >= 0; --i) {
ActivityStack stack = stacks.get(i);
if (stack != this && stack.isFocusable()
&& stack.getStackVisibilityLocked(null) != STACK_INVISIBLE) {
return stack;
}
}
}
return null;
}
/** Returns true if the stack contains a fullscreen task. */
private boolean hasFullscreenTask() {
for (int i = mTaskHistory.size() - 1; i >= 0; --i) {
final TaskRecord task = mTaskHistory.get(i);
if (task.mFullscreen) {
return true;
}
}
return false;
}
/**
* Returns true if the stack is translucent and can have other contents visible behind it if
* needed. A stack is considered translucent if it don't contain a visible or
* starting (about to be visible) activity that is fullscreen (opaque).
* @param starting The currently starting activity or null if there is none.
* @param stackBehindId The id of the stack directly behind this one.
*/
private boolean isStackTranslucent(ActivityRecord starting, int stackBehindId) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
final ArrayList<ActivityRecord> activities = task.mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if (r.finishing) {
// We don't factor in finishing activities when determining translucency since
// they will be gone soon.
continue;
}
if (!r.visible && r != starting) {
// Also ignore invisible activities that are not the currently starting
// activity (about to be visible).
continue;
}
if (r.fullscreen) {
// Stack isn't translucent if it has at least one fullscreen activity
// that is visible.
return false;
}
if (!isHomeStack() && r.frontOfTask
&& task.isOverHomeStack() && stackBehindId != HOME_STACK_ID) {
// Stack isn't translucent if it's top activity should have the home stack
// behind it and the stack currently behind it isn't the home stack.
return false;
}
}
}
return true;
}
/**
* Returns stack's visibility: {@link #STACK_INVISIBLE}, {@link #STACK_VISIBLE} or
* {@link #STACK_VISIBLE_ACTIVITY_BEHIND}.
* @param starting The currently starting activity or null if there is none.
*/
int getStackVisibilityLocked(ActivityRecord starting) {
if (!isAttached()) {
return STACK_INVISIBLE;
}
if (mStackSupervisor.isFrontStack(this) || mStackSupervisor.isFocusedStack(this)) {
return STACK_VISIBLE;
}
final int stackIndex = mStacks.indexOf(this);
if (stackIndex == mStacks.size() - 1) {
Slog.wtf(TAG,
"Stack=" + this + " isn't front stack but is at the top of the stack list");
return STACK_INVISIBLE;
}
final ActivityStack focusedStack = mStackSupervisor.getFocusedStack();
final int focusedStackId = focusedStack.mStackId;
if (mStackId == FULLSCREEN_WORKSPACE_STACK_ID
&& hasVisibleBehindActivity() && focusedStackId == HOME_STACK_ID
&& !focusedStack.topActivity().fullscreen) {
// The fullscreen stack should be visible if it has a visible behind activity behind
// the home stack that is translucent.
return STACK_VISIBLE_ACTIVITY_BEHIND;
}
if (mStackId == DOCKED_STACK_ID) {
// Docked stack is always visible, except in the case where the top running activity
// task in the focus stack doesn't support any form of resizing but we show it for the
// home task even though it's not resizable.
final ActivityRecord r = focusedStack.topRunningActivityLocked();
final TaskRecord task = r != null ? r.task : null;
return task == null || task.canGoInDockedStack() || task.isHomeTask() ? STACK_VISIBLE
: STACK_INVISIBLE;
}
// Find the first stack behind focused stack that actually got something visible.
int stackBehindFocusedIndex = mStacks.indexOf(focusedStack) - 1;
while (stackBehindFocusedIndex >= 0 &&
mStacks.get(stackBehindFocusedIndex).topRunningActivityLocked() == null) {
stackBehindFocusedIndex--;
}
if ((focusedStackId == DOCKED_STACK_ID || focusedStackId == PINNED_STACK_ID)
&& stackIndex == stackBehindFocusedIndex) {
// Stacks directly behind the docked or pinned stack are always visible.
return STACK_VISIBLE;
}
final int stackBehindFocusedId = (stackBehindFocusedIndex >= 0)
? mStacks.get(stackBehindFocusedIndex).mStackId : INVALID_STACK_ID;
if (focusedStackId == FULLSCREEN_WORKSPACE_STACK_ID
&& focusedStack.isStackTranslucent(starting, stackBehindFocusedId)) {
// Stacks behind the fullscreen stack with a translucent activity are always
// visible so they can act as a backdrop to the translucent activity.
// For example, dialog activities
if (stackIndex == stackBehindFocusedIndex) {
return STACK_VISIBLE;
}
if (stackBehindFocusedIndex >= 0) {
if ((stackBehindFocusedId == DOCKED_STACK_ID
|| stackBehindFocusedId == PINNED_STACK_ID)
&& stackIndex == (stackBehindFocusedIndex - 1)) {
// The stack behind the docked or pinned stack is also visible so we can have a
// complete backdrop to the translucent activity when the docked stack is up.
return STACK_VISIBLE;
}
}
}
if (StackId.isStaticStack(mStackId)) {
// Visibility of any static stack should have been determined by the conditions above.
return STACK_INVISIBLE;
}
for (int i = stackIndex + 1; i < mStacks.size(); i++) {
final ActivityStack stack = mStacks.get(i);
if (!stack.mFullscreen && !stack.hasFullscreenTask()) {
continue;
}
if (!StackId.isDynamicStacksVisibleBehindAllowed(stack.mStackId)) {
// These stacks can't have any dynamic stacks visible behind them.
return STACK_INVISIBLE;
}
if (!stack.isStackTranslucent(starting, INVALID_STACK_ID)) {
return STACK_INVISIBLE;
}
}
return STACK_VISIBLE;
}
final int rankTaskLayers(int baseLayer) {
int layer = 0;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
ActivityRecord r = task.topRunningActivityLocked();
if (r == null || r.finishing || !r.visible) {
task.mLayerRank = -1;
} else {
task.mLayerRank = baseLayer + layer++;
}
}
return layer;
}
/**
* Make sure that all activities that need to be visible (that is, they
* currently can be seen by the user) actually are.
*/
final void ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges,
boolean preserveWindows) {
ActivityRecord top = topRunningActivityLocked();
if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "ensureActivitiesVisible behind " + top
+ " configChanges=0x" + Integer.toHexString(configChanges));
if (top != null) {
checkTranslucentActivityWaiting(top);
}
// If the top activity is not fullscreen, then we need to
// make sure any activities under it are now visible.
boolean aboveTop = top != null;
final int stackVisibility = getStackVisibilityLocked(starting);
final boolean stackInvisible = stackVisibility != STACK_VISIBLE;
final boolean stackVisibleBehind = stackVisibility == STACK_VISIBLE_ACTIVITY_BEHIND;
boolean behindFullscreenActivity = stackInvisible;
boolean resumeNextActivity = mStackSupervisor.isFocusedStack(this)
&& (isInStackLocked(starting) == null);
boolean behindTranslucentActivity = false;
final ActivityRecord visibleBehind = getVisibleBehindActivity();
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
final ArrayList<ActivityRecord> activities = task.mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if (r.finishing) {
// Normally the screenshot will be taken in makeInvisible(). When an activity
// is finishing, we no longer change its visibility, but we still need to take
// the screenshots if startPausingLocked decided it should be taken.
if (r.mUpdateTaskThumbnailWhenHidden) {
r.updateThumbnailLocked(screenshotActivitiesLocked(r), null);
r.mUpdateTaskThumbnailWhenHidden = false;
}
continue;
}
final boolean isTop = r == top;
if (aboveTop && !isTop) {
continue;
}
aboveTop = false;
if (shouldBeVisible(r, behindTranslucentActivity, stackVisibleBehind,
visibleBehind, behindFullscreenActivity)) {
if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Make visible? " + r
+ " finishing=" + r.finishing + " state=" + r.state);
// First: if this is not the current activity being started, make
// sure it matches the current configuration.
if (r != starting) {
ensureActivityConfigurationLocked(r, 0, preserveWindows);
}
if (r.app == null || r.app.thread == null) {
if (makeVisibleAndRestartIfNeeded(starting, configChanges, isTop,
resumeNextActivity, r)) {
if (activityNdx >= activities.size()) {
// Record may be removed if its process needs to restart.
activityNdx = activities.size() - 1;
} else {
resumeNextActivity = false;
}
}
} else if (r.visible) {
// If this activity is already visible, then there is nothing to do here.
if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY,
"Skipping: already visible at " + r);
if (handleAlreadyVisible(r)) {
resumeNextActivity = false;
}
} else {
makeVisibleIfNeeded(starting, r);
}
// Aggregate current change flags.
configChanges |= r.configChangeFlags;
behindFullscreenActivity = updateBehindFullscreen(stackInvisible,
behindFullscreenActivity, task, r);
if (behindFullscreenActivity && !r.fullscreen) {
behindTranslucentActivity = true;
}
} else {
if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Make invisible? " + r
+ " finishing=" + r.finishing + " state=" + r.state + " stackInvisible="
+ stackInvisible + " behindFullscreenActivity="
+ behindFullscreenActivity + " mLaunchTaskBehind="
+ r.mLaunchTaskBehind);
makeInvisible(r, visibleBehind);
}
}
if (mStackId == FREEFORM_WORKSPACE_STACK_ID) {
// The visibility of tasks and the activities they contain in freeform stack are
// determined individually unlike other stacks where the visibility or fullscreen
// status of an activity in a previous task affects other.
behindFullscreenActivity = stackVisibility == STACK_INVISIBLE;
} else if (mStackId == HOME_STACK_ID) {
if (task.isHomeTask()) {
if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Home task: at " + task
+ " stackInvisible=" + stackInvisible
+ " behindFullscreenActivity=" + behindFullscreenActivity);
// No other task in the home stack should be visible behind the home activity.
// Home activities is usually a translucent activity with the wallpaper behind
// them. However, when they don't have the wallpaper behind them, we want to
// show activities in the next application stack behind them vs. another
// task in the home stack like recents.
behindFullscreenActivity = true;
} else if (task.isRecentsTask()
&& task.getTaskToReturnTo() == APPLICATION_ACTIVITY_TYPE) {
if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY,
"Recents task returning to app: at " + task
+ " stackInvisible=" + stackInvisible
+ " behindFullscreenActivity=" + behindFullscreenActivity);
// We don't want any other tasks in the home stack visible if the recents
// activity is going to be returning to an application activity type.
// We do this to preserve the visible order the user used to get into the
// recents activity. The recents activity is normally translucent and if it
// doesn't have the wallpaper behind it the next activity in the home stack
// shouldn't be visible when the home stack is brought to the front to display
// the recents activity from an app.
behindFullscreenActivity = true;
}
}
}
if (mTranslucentActivityWaiting != null &&
mUndrawnActivitiesBelowTopTranslucent.isEmpty()) {
// Nothing is getting drawn or everything was already visible, don't wait for timeout.
notifyActivityDrawnLocked(null);
}
}
/** Return true if the input activity should be made visible */
private boolean shouldBeVisible(ActivityRecord r, boolean behindTranslucentActivity,
boolean stackVisibleBehind, ActivityRecord visibleBehind,
boolean behindFullscreenActivity) {
if (!okToShowLocked(r)) {
return false;
}
// mLaunchingBehind: Activities launching behind are at the back of the task stack
// but must be drawn initially for the animation as though they were visible.
final boolean activityVisibleBehind =
(behindTranslucentActivity || stackVisibleBehind) && visibleBehind == r;
boolean isVisible =
!behindFullscreenActivity || r.mLaunchTaskBehind || activityVisibleBehind;
if (mService.mSupportsLeanbackOnly && isVisible && r.isRecentsActivity()) {
// On devices that support leanback only (Android TV), Recents activity can only be
// visible if the home stack is the focused stack or we are in split-screen mode.
isVisible = mStackSupervisor.getStack(DOCKED_STACK_ID) != null
|| mStackSupervisor.isFocusedStack(this);
}
return isVisible;
}
private void checkTranslucentActivityWaiting(ActivityRecord top) {
if (mTranslucentActivityWaiting != top) {
mUndrawnActivitiesBelowTopTranslucent.clear();
if (mTranslucentActivityWaiting != null) {
// Call the callback with a timeout indication.
notifyActivityDrawnLocked(null);
mTranslucentActivityWaiting = null;
}
mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG);
}
}
private boolean makeVisibleAndRestartIfNeeded(ActivityRecord starting, int configChanges,
boolean isTop, boolean andResume, ActivityRecord r) {
// We need to make sure the app is running if it's the top, or it is just made visible from
// invisible. If the app is already visible, it must have died while it was visible. In this
// case, we'll show the dead window but will not restart the app. Otherwise we could end up
// thrashing.
if (isTop || !r.visible) {
// This activity needs to be visible, but isn't even running...
// get it started and resume if no other stack in this stack is resumed.
if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Start and freeze screen for " + r);
if (r != starting) {
r.startFreezingScreenLocked(r.app, configChanges);
}
if (!r.visible || r.mLaunchTaskBehind) {
if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Starting and making visible: " + r);
setVisible(r, true);
}
if (r != starting) {
mStackSupervisor.startSpecificActivityLocked(r, andResume, false);
return true;
}
}
return false;
}
private void makeInvisible(ActivityRecord r, ActivityRecord visibleBehind) {
if (!r.visible) {
if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Already invisible: " + r);
return;
}
// Now for any activities that aren't visible to the user, make sure they no longer are
// keeping the screen frozen.
if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Making invisible: " + r + " " + r.state);
try {
setVisible(r, false);
switch (r.state) {
case STOPPING:
case STOPPED:
if (r.app != null && r.app.thread != null) {
if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY,
"Scheduling invisibility: " + r);
r.app.thread.scheduleWindowVisibility(r.appToken, false);
}
break;
case INITIALIZING:
case RESUMED:
case PAUSING:
case PAUSED:
// This case created for transitioning activities from
// translucent to opaque {@link Activity#convertToOpaque}.
if (visibleBehind == r) {
releaseBackgroundResources(r);
} else {
addToStopping(r, true /* immediate */);
}
break;
default:
break;
}
} catch (Exception e) {
// Just skip on any failure; we'll make it visible when it next restarts.
Slog.w(TAG, "Exception thrown making hidden: " + r.intent.getComponent(), e);
}
}
private boolean updateBehindFullscreen(boolean stackInvisible, boolean behindFullscreenActivity,
TaskRecord task, ActivityRecord r) {
if (r.fullscreen) {
if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Fullscreen: at " + r
+ " stackInvisible=" + stackInvisible
+ " behindFullscreenActivity=" + behindFullscreenActivity);
// At this point, nothing else needs to be shown in this task.
behindFullscreenActivity = true;
} else if (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()) {
if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Showing home: at " + r
+ " stackInvisible=" + stackInvisible
+ " behindFullscreenActivity=" + behindFullscreenActivity);
behindFullscreenActivity = true;
}
return behindFullscreenActivity;
}
private void makeVisibleIfNeeded(ActivityRecord starting, ActivityRecord r) {
// This activity is not currently visible, but is running. Tell it to become visible.
if (r.state == ActivityState.RESUMED || r == starting) {
if (DEBUG_VISIBILITY) Slog.d(TAG_VISIBILITY,
"Not making visible, r=" + r + " state=" + r.state + " starting=" + starting);
return;
}
// If this activity is paused, tell it to now show its window.
if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY,
"Making visible and scheduling visibility: " + r);
try {
if (mTranslucentActivityWaiting != null) {
r.updateOptionsLocked(r.returningOptions);
mUndrawnActivitiesBelowTopTranslucent.add(r);
}
setVisible(r, true);
r.sleeping = false;
r.app.pendingUiClean = true;
r.app.thread.scheduleWindowVisibility(r.appToken, true);
// The activity may be waiting for stop, but that is no longer
// appropriate for it.
mStackSupervisor.mStoppingActivities.remove(r);
mStackSupervisor.mGoingToSleepActivities.remove(r);
} catch (Exception e) {
// Just skip on any failure; we'll make it
// visible when it next restarts.
Slog.w(TAG, "Exception thrown making visibile: " + r.intent.getComponent(), e);
}
handleAlreadyVisible(r);
}
private boolean handleAlreadyVisible(ActivityRecord r) {
r.stopFreezingScreenLocked(false);
try {
if (r.returningOptions != null) {
r.app.thread.scheduleOnNewActivityOptions(r.appToken, r.returningOptions);
}
} catch(RemoteException e) {
}
return r.state == ActivityState.RESUMED;
}
void convertActivityToTranslucent(ActivityRecord r) {
mTranslucentActivityWaiting = r;
mUndrawnActivitiesBelowTopTranslucent.clear();
mHandler.sendEmptyMessageDelayed(TRANSLUCENT_TIMEOUT_MSG, TRANSLUCENT_CONVERSION_TIMEOUT);
}
void clearOtherAppTimeTrackers(AppTimeTracker except) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
final ArrayList<ActivityRecord> activities = task.mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if ( r.appTimeTracker != except) {
r.appTimeTracker = null;
}
}
}
}
/**
* Called as activities below the top translucent activity are redrawn. When the last one is
* redrawn notify the top activity by calling
* {@link Activity#onTranslucentConversionComplete}.
*
* @param r The most recent background activity to be drawn. Or, if r is null then a timeout
* occurred and the activity will be notified immediately.
*/
void notifyActivityDrawnLocked(ActivityRecord r) {
mActivityContainer.setDrawn();
if ((r == null)
|| (mUndrawnActivitiesBelowTopTranslucent.remove(r) &&
mUndrawnActivitiesBelowTopTranslucent.isEmpty())) {
// The last undrawn activity below the top has just been drawn. If there is an
// opaque activity at the top, notify it that it can become translucent safely now.
final ActivityRecord waitingActivity = mTranslucentActivityWaiting;
mTranslucentActivityWaiting = null;
mUndrawnActivitiesBelowTopTranslucent.clear();
mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG);
if (waitingActivity != null) {
mWindowManager.setWindowOpaque(waitingActivity.appToken, false);
if (waitingActivity.app != null && waitingActivity.app.thread != null) {
try {
waitingActivity.app.thread.scheduleTranslucentConversionComplete(
waitingActivity.appToken, r != null);
} catch (RemoteException e) {
}
}
}
}
}
/** If any activities below the top running one are in the INITIALIZING state and they have a
* starting window displayed then remove that starting window. It is possible that the activity
* in this state will never resumed in which case that starting window will be orphaned. */
void cancelInitializingActivities() {
final ActivityRecord topActivity = topRunningActivityLocked();
boolean aboveTop = true;
// We don't want to clear starting window for activities that aren't behind fullscreen
// activities as we need to display their starting window until they are done initializing.
boolean behindFullscreenActivity = false;
if (getStackVisibilityLocked(null) == STACK_INVISIBLE) {
// The stack is not visible, so no activity in it should be displaying a starting
// window. Mark all activities below top and behind fullscreen.
aboveTop = false;
behindFullscreenActivity = true;
}
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if (aboveTop) {
if (r == topActivity) {
aboveTop = false;
}
behindFullscreenActivity |= r.fullscreen;
continue;
}
if (r.state == ActivityState.INITIALIZING
&& r.mStartingWindowState == STARTING_WINDOW_SHOWN
&& behindFullscreenActivity) {
if (DEBUG_VISIBILITY) Slog.w(TAG_VISIBILITY,
"Found orphaned starting window " + r);
r.mStartingWindowState = STARTING_WINDOW_REMOVED;
mWindowManager.removeAppStartingWindow(r.appToken);
}
behindFullscreenActivity |= r.fullscreen;
}
}
}
/**
* Ensure that the top activity in the stack is resumed.
*
* @param prev The previously resumed activity, for when in the process
* of pausing; can be null to call from elsewhere.
* @param options Activity options.
*
* @return Returns true if something is being resumed, or false if
* nothing happened.
*
* NOTE: It is not safe to call this method directly as it can cause an activity in a
* non-focused stack to be resumed.
* Use {@link ActivityStackSupervisor#resumeFocusedStackTopActivityLocked} to resume the
* right activity for the current system state.
*/
boolean resumeTopActivityUncheckedLocked(ActivityRecord prev, ActivityOptions options) {
if (mStackSupervisor.inResumeTopActivity) {
// Don't even start recursing.
return false;
}
boolean result = false;
try {
// Protect against recursion.
mStackSupervisor.inResumeTopActivity = true;
if (mService.mLockScreenShown == ActivityManagerService.LOCK_SCREEN_LEAVING) {
mService.mLockScreenShown = ActivityManagerService.LOCK_SCREEN_HIDDEN;
mService.updateSleepIfNeededLocked();
}
result = resumeTopActivityInnerLocked(prev, options);
} finally {
mStackSupervisor.inResumeTopActivity = false;
}
return result;
}
private boolean resumeTopActivityInnerLocked(ActivityRecord prev, ActivityOptions options) {
if (DEBUG_LOCKSCREEN) mService.logLockScreen("");
if (!mService.mBooting && !mService.mBooted) {
// Not ready yet!
return false;
}
ActivityRecord parent = mActivityContainer.mParentActivity;
if ((parent != null && parent.state != ActivityState.RESUMED) ||
!mActivityContainer.isAttachedLocked()) {
// Do not resume this stack if its parent is not resumed.
// TODO: If in a loop, make sure that parent stack resumeTopActivity is called 1st.
return false;
}
mStackSupervisor.cancelInitializingActivities();
// Find the first activity that is not finishing.
final ActivityRecord next = topRunningActivityLocked();
// Remember how we'll process this pause/resume situation, and ensure
// that the state is reset however we wind up proceeding.
final boolean userLeaving = mStackSupervisor.mUserLeaving;
mStackSupervisor.mUserLeaving = false;
final TaskRecord prevTask = prev != null ? prev.task : null;
if (next == null) {
// There are no more activities!
final String reason = "noMoreActivities";
final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack()
? HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo();
if (!mFullscreen && adjustFocusToNextFocusableStackLocked(returnTaskType, reason)) {
// Try to move focus to the next visible stack with a running activity if this
// stack is not covering the entire screen.
return mStackSupervisor.resumeFocusedStackTopActivityLocked(
mStackSupervisor.getFocusedStack(), prev, null);
}
// Let's just start up the Launcher...
ActivityOptions.abort(options);
if (DEBUG_STATES) Slog.d(TAG_STATES,
"resumeTopActivityLocked: No more activities go home");
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
// Only resume home if on home display
return isOnHomeDisplay() &&
mStackSupervisor.resumeHomeStackTask(returnTaskType, prev, reason);
}
next.delayedResume = false;
// If the top activity is the resumed one, nothing to do.
if (mResumedActivity == next && next.state == ActivityState.RESUMED &&
mStackSupervisor.allResumedActivitiesComplete()) {
// Make sure we have executed any pending transitions, since there
// should be nothing left to do at this point.
mWindowManager.executeAppTransition();
mNoAnimActivities.clear();
ActivityOptions.abort(options);
if (DEBUG_STATES) Slog.d(TAG_STATES,
"resumeTopActivityLocked: Top activity resumed " + next);
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return false;
}
final TaskRecord nextTask = next.task;
if (prevTask != null && prevTask.stack == this &&
prevTask.isOverHomeStack() && prev.finishing && prev.frontOfTask) {
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
if (prevTask == nextTask) {
prevTask.setFrontOfTask();
} else if (prevTask != topTask()) {
// This task is going away but it was supposed to return to the home stack.
// Now the task above it has to return to the home task instead.
final int taskNdx = mTaskHistory.indexOf(prevTask) + 1;
mTaskHistory.get(taskNdx).setTaskToReturnTo(HOME_ACTIVITY_TYPE);
} else if (!isOnHomeDisplay()) {
return false;
} else if (!isHomeStack()){
if (DEBUG_STATES) Slog.d(TAG_STATES,
"resumeTopActivityLocked: Launching home next");
final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ?
HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo();
return isOnHomeDisplay() &&
mStackSupervisor.resumeHomeStackTask(returnTaskType, prev, "prevFinished");
}
}
// If we are sleeping, and there is no resumed activity, and the top
// activity is paused, well that is the state we want.
if (mService.isSleepingOrShuttingDownLocked()
&& mLastPausedActivity == next
&& mStackSupervisor.allPausedActivitiesComplete()) {
// Make sure we have executed any pending transitions, since there
// should be nothing left to do at this point.
mWindowManager.executeAppTransition();
mNoAnimActivities.clear();
ActivityOptions.abort(options);
if (DEBUG_STATES) Slog.d(TAG_STATES,
"resumeTopActivityLocked: Going to sleep and all paused");
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return false;
}
// Make sure that the user who owns this activity is started. If not,
// we will just leave it as is because someone should be bringing
// another user's activities to the top of the stack.
if (!mService.mUserController.hasStartedUserState(next.userId)) {
Slog.w(TAG, "Skipping resume of top activity " + next
+ ": user " + next.userId + " is stopped");
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return false;
}
// The activity may be waiting for stop, but that is no longer
// appropriate for it.
mStackSupervisor.mStoppingActivities.remove(next);
mStackSupervisor.mGoingToSleepActivities.remove(next);
next.sleeping = false;
mStackSupervisor.mWaitingVisibleActivities.remove(next);
if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Resuming " + next);
// If we are currently pausing an activity, then don't do anything until that is done.
if (!mStackSupervisor.allPausedActivitiesComplete()) {
if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG_PAUSE,
"resumeTopActivityLocked: Skip resume: some activity pausing.");
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return false;
}
mStackSupervisor.setLaunchSource(next.info.applicationInfo.uid);
// We need to start pausing the current activity so the top one can be resumed...
final boolean dontWaitForPause = (next.info.flags & FLAG_RESUME_WHILE_PAUSING) != 0;
boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving, next, dontWaitForPause);
if (mResumedActivity != null) {
if (DEBUG_STATES) Slog.d(TAG_STATES,
"resumeTopActivityLocked: Pausing " + mResumedActivity);
pausing |= startPausingLocked(userLeaving, false, next, dontWaitForPause);
}
if (pausing) {
if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG_STATES,
"resumeTopActivityLocked: Skip resume: need to start pausing");
// At this point we want to put the upcoming activity's process
// at the top of the LRU list, since we know we will be needing it
// very soon and it would be a waste to let it get killed if it
// happens to be sitting towards the end.
if (next.app != null && next.app.thread != null) {
mService.updateLruProcessLocked(next.app, true, null);
}
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return true;
} else if (mResumedActivity == next && next.state == ActivityState.RESUMED &&
mStackSupervisor.allResumedActivitiesComplete()) {
// It is possible for the activity to be resumed when we paused back stacks above if the
// next activity doesn't have to wait for pause to complete.
// So, nothing else to-do except:
// Make sure we have executed any pending transitions, since there
// should be nothing left to do at this point.
mWindowManager.executeAppTransition();
mNoAnimActivities.clear();
ActivityOptions.abort(options);
if (DEBUG_STATES) Slog.d(TAG_STATES,
"resumeTopActivityLocked: Top activity resumed (dontWaitForPause) " + next);
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return true;
}
// If the most recent activity was noHistory but was only stopped rather
// than stopped+finished because the device went to sleep, we need to make
// sure to finish it as we're making a new activity topmost.
if (mService.isSleepingLocked() && mLastNoHistoryActivity != null &&
!mLastNoHistoryActivity.finishing) {
if (DEBUG_STATES) Slog.d(TAG_STATES,
"no-history finish of " + mLastNoHistoryActivity + " on new resume");
requestFinishActivityLocked(mLastNoHistoryActivity.appToken, Activity.RESULT_CANCELED,
null, "resume-no-history", false);
mLastNoHistoryActivity = null;
}
if (prev != null && prev != next) {
if (!mStackSupervisor.mWaitingVisibleActivities.contains(prev)
&& next != null && !next.nowVisible) {
mStackSupervisor.mWaitingVisibleActivities.add(prev);
if (DEBUG_SWITCH) Slog.v(TAG_SWITCH,
"Resuming top, waiting visible to hide: " + prev);
} else {
// The next activity is already visible, so hide the previous
// activity's windows right now so we can show the new one ASAP.
// We only do this if the previous is finishing, which should mean
// it is on top of the one being resumed so hiding it quickly
// is good. Otherwise, we want to do the normal route of allowing
// the resumed activity to be shown so we can decide if the
// previous should actually be hidden depending on whether the
// new one is found to be full-screen or not.
if (prev.finishing) {
mWindowManager.setAppVisibility(prev.appToken, false);
if (DEBUG_SWITCH) Slog.v(TAG_SWITCH,
"Not waiting for visible to hide: " + prev + ", waitingVisible="
+ mStackSupervisor.mWaitingVisibleActivities.contains(prev)
+ ", nowVisible=" + next.nowVisible);
} else {
if (DEBUG_SWITCH) Slog.v(TAG_SWITCH,
"Previous already visible but still waiting to hide: " + prev
+ ", waitingVisible="
+ mStackSupervisor.mWaitingVisibleActivities.contains(prev)
+ ", nowVisible=" + next.nowVisible);
}
}
}
// Launching this app's activity, make sure the app is no longer
// considered stopped.
try {
AppGlobals.getPackageManager().setPackageStoppedState(
next.packageName, false, next.userId); /* TODO: Verify if correct userid */
} catch (RemoteException e1) {
} catch (IllegalArgumentException e) {
Slog.w(TAG, "Failed trying to unstop package "
+ next.packageName + ": " + e);
}
// We are starting up the next activity, so tell the window manager
// that the previous one will be hidden soon. This way it can know
// to ignore it when computing the desired screen orientation.
boolean anim = true;
if (prev != null) {
if (prev.finishing) {
if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION,
"Prepare close transition: prev=" + prev);
if (mNoAnimActivities.contains(prev)) {
anim = false;
mWindowManager.prepareAppTransition(TRANSIT_NONE, false);
} else {
mWindowManager.prepareAppTransition(prev.task == next.task
? TRANSIT_ACTIVITY_CLOSE
: TRANSIT_TASK_CLOSE, false);
}
mWindowManager.setAppVisibility(prev.appToken, false);
} else {
if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION,
"Prepare open transition: prev=" + prev);
if (mNoAnimActivities.contains(next)) {
anim = false;
mWindowManager.prepareAppTransition(TRANSIT_NONE, false);
} else {
mWindowManager.prepareAppTransition(prev.task == next.task
? TRANSIT_ACTIVITY_OPEN
: next.mLaunchTaskBehind
? TRANSIT_TASK_OPEN_BEHIND
: TRANSIT_TASK_OPEN, false);
}
}
} else {
if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare open transition: no previous");
if (mNoAnimActivities.contains(next)) {
anim = false;
mWindowManager.prepareAppTransition(TRANSIT_NONE, false);
} else {
mWindowManager.prepareAppTransition(TRANSIT_ACTIVITY_OPEN, false);
}
}
Bundle resumeAnimOptions = null;
if (anim) {
ActivityOptions opts = next.getOptionsForTargetActivityLocked();
if (opts != null) {
resumeAnimOptions = opts.toBundle();
}
next.applyOptionsLocked();
} else {
next.clearOptionsLocked();
}
ActivityStack lastStack = mStackSupervisor.getLastStack();
if (next.app != null && next.app.thread != null) {
if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Resume running: " + next
+ " stopped=" + next.stopped + " visible=" + next.visible);
// If the previous activity is translucent, force a visibility update of
// the next activity, so that it's added to WM's opening app list, and
// transition animation can be set up properly.
// For example, pressing Home button with a translucent activity in focus.
// Launcher is already visible in this case. If we don't add it to opening
// apps, maybeUpdateTransitToWallpaper() will fail to identify this as a
// TRANSIT_WALLPAPER_OPEN animation, and run some funny animation.
final boolean lastActivityTranslucent = lastStack != null
&& (!lastStack.mFullscreen
|| (lastStack.mLastPausedActivity != null
&& !lastStack.mLastPausedActivity.fullscreen));
// This activity is now becoming visible.
if (!next.visible || next.stopped || lastActivityTranslucent) {
mWindowManager.setAppVisibility(next.appToken, true);
}
// schedule launch ticks to collect information about slow apps.
next.startLaunchTickingLocked();
ActivityRecord lastResumedActivity =
lastStack == null ? null :lastStack.mResumedActivity;
ActivityState lastState = next.state;
mService.updateCpuStats();
if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to RESUMED: " + next + " (in existing)");
next.state = ActivityState.RESUMED;
mResumedActivity = next;
next.task.touchActiveTime();
mRecentTasks.addLocked(next.task);
mService.updateLruProcessLocked(next.app, true, null);
updateLRUListLocked(next);
mService.updateOomAdjLocked();
// Have the window manager re-evaluate the orientation of
// the screen based on the new activity order.
boolean notUpdated = true;
if (mStackSupervisor.isFocusedStack(this)) {
Configuration config = mWindowManager.updateOrientationFromAppTokens(
mService.mConfiguration,
next.mayFreezeScreenLocked(next.app) ? next.appToken : null);
if (config != null) {
next.frozenBeforeDestroy = true;
}
notUpdated = !mService.updateConfigurationLocked(config, next, false);
}
if (notUpdated) {
// The configuration update wasn't able to keep the existing
// instance of the activity, and instead started a new one.
// We should be all done, but let's just make sure our activity
// is still at the top and schedule another run if something
// weird happened.
ActivityRecord nextNext = topRunningActivityLocked();
if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_STATES,
"Activity config changed during resume: " + next
+ ", new next: " + nextNext);
if (nextNext != next) {
// Do over!
mStackSupervisor.scheduleResumeTopActivities();
}
if (mStackSupervisor.reportResumedActivityLocked(next)) {
mNoAnimActivities.clear();
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return true;
}
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return false;
}
try {
// Deliver all pending results.
ArrayList<ResultInfo> a = next.results;
if (a != null) {
final int N = a.size();
if (!next.finishing && N > 0) {
if (DEBUG_RESULTS) Slog.v(TAG_RESULTS,
"Delivering results to " + next + ": " + a);
next.app.thread.scheduleSendResult(next.appToken, a);
}
}
boolean allowSavedSurface = true;
if (next.newIntents != null) {
// Restrict saved surface to launcher start, or there is no intent at all
// (eg. task being brought to front). If the intent is something else,
// likely the app is going to show some specific page or view, instead of
// what's left last time.
for (int i = next.newIntents.size() - 1; i >= 0; i--) {
final Intent intent = next.newIntents.get(i);
if (intent != null && !ActivityRecord.isMainIntent(intent)) {
allowSavedSurface = false;
break;
}
}
next.app.thread.scheduleNewIntent(
next.newIntents, next.appToken, false /* andPause */);
}
// Well the app will no longer be stopped.
// Clear app token stopped state in window manager if needed.
mWindowManager.notifyAppResumed(next.appToken, next.stopped, allowSavedSurface);
EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, next.userId,
System.identityHashCode(next), next.task.taskId, next.shortComponentName);
next.sleeping = false;
mService.showUnsupportedZoomDialogIfNeededLocked(next);
mService.showAskCompatModeDialogLocked(next);
next.app.pendingUiClean = true;
next.app.forceProcessStateUpTo(mService.mTopProcessState);
next.clearOptionsLocked();
next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState,
mService.isNextTransitionForward(), resumeAnimOptions);
mStackSupervisor.checkReadyForSleepLocked();
if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Resumed " + next);
} catch (Exception e) {
// Whoops, need to restart this activity!
if (DEBUG_STATES) Slog.v(TAG_STATES, "Resume failed; resetting state to "
+ lastState + ": " + next);
next.state = lastState;
if (lastStack != null) {
lastStack.mResumedActivity = lastResumedActivity;
}
Slog.i(TAG, "Restarting because process died: " + next);
if (!next.hasBeenLaunched) {
next.hasBeenLaunched = true;
} else if (SHOW_APP_STARTING_PREVIEW && lastStack != null &&
mStackSupervisor.isFrontStack(lastStack)) {
next.showStartingWindow(null, true);
}
mStackSupervisor.startSpecificActivityLocked(next, true, false);
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return true;
}
// From this point on, if something goes wrong there is no way
// to recover the activity.
try {
completeResumeLocked(next);
} catch (Exception e) {
// If any exception gets thrown, toss away this
// activity and try the next one.
Slog.w(TAG, "Exception thrown during resume of " + next, e);
requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null,
"resume-exception", true);
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return true;
}
} else {
// Whoops, need to restart this activity!
if (!next.hasBeenLaunched) {
next.hasBeenLaunched = true;
} else {
if (SHOW_APP_STARTING_PREVIEW) {
next.showStartingWindow(null, true);
}
if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Restarting: " + next);
}
if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Restarting " + next);
mStackSupervisor.startSpecificActivityLocked(next, true, true);
}
if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked();
return true;
}
private TaskRecord getNextTask(TaskRecord targetTask) {
final int index = mTaskHistory.indexOf(targetTask);
if (index >= 0) {
final int numTasks = mTaskHistory.size();
for (int i = index + 1; i < numTasks; ++i) {
TaskRecord task = mTaskHistory.get(i);
if (task.userId == targetTask.userId) {
return task;
}
}
}
return null;
}
private void insertTaskAtPosition(TaskRecord task, int position) {
if (position >= mTaskHistory.size()) {
insertTaskAtTop(task, null);
return;
}
// Calculate maximum possible position for this task.
int maxPosition = mTaskHistory.size();
if (!mStackSupervisor.isCurrentProfileLocked(task.userId)
&& task.topRunningActivityLocked() == null) {
// Put non-current user tasks below current user tasks.
while (maxPosition > 0) {
final TaskRecord tmpTask = mTaskHistory.get(maxPosition - 1);
if (!mStackSupervisor.isCurrentProfileLocked(tmpTask.userId)
|| tmpTask.topRunningActivityLocked() == null) {
break;
}
maxPosition--;
}
}
position = Math.min(position, maxPosition);
mTaskHistory.remove(task);
mTaskHistory.add(position, task);
updateTaskMovement(task, true);
}
private void insertTaskAtTop(TaskRecord task, ActivityRecord newActivity) {
boolean isLastTaskOverHome = false;
// If the moving task is over home stack, transfer its return type to next task
if (task.isOverHomeStack()) {
final TaskRecord nextTask = getNextTask(task);
if (nextTask != null) {
nextTask.setTaskToReturnTo(task.getTaskToReturnTo());
} else {
isLastTaskOverHome = true;
}
}
// If this is being moved to the top by another activity or being launched from the home
// activity, set mTaskToReturnTo accordingly.
if (isOnHomeDisplay()) {
ActivityStack lastStack = mStackSupervisor.getLastStack();
final boolean fromHome = lastStack.isHomeStack();
if (!isHomeStack() && (fromHome || topTask() != task)) {
// If it's a last task over home - we default to keep its return to type not to
// make underlying task focused when this one will be finished.
int returnToType = isLastTaskOverHome
? task.getTaskToReturnTo() : APPLICATION_ACTIVITY_TYPE;
if (fromHome && StackId.allowTopTaskToReturnHome(mStackId)) {
returnToType = lastStack.topTask() == null
? HOME_ACTIVITY_TYPE : lastStack.topTask().taskType;
}
task.setTaskToReturnTo(returnToType);
}
} else {
task.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE);
}
mTaskHistory.remove(task);
// Now put task at top.
int taskNdx = mTaskHistory.size();
final boolean notShownWhenLocked =
(newActivity != null && (newActivity.info.flags & FLAG_SHOW_FOR_ALL_USERS) == 0)
|| (newActivity == null && task.topRunningActivityLocked() == null);
if (!mStackSupervisor.isCurrentProfileLocked(task.userId) && notShownWhenLocked) {
// Put non-current user tasks below current user tasks.
while (--taskNdx >= 0) {
final TaskRecord tmpTask = mTaskHistory.get(taskNdx);
if (!mStackSupervisor.isCurrentProfileLocked(tmpTask.userId)
|| tmpTask.topRunningActivityLocked() == null) {
break;
}
}
++taskNdx;
}
mTaskHistory.add(taskNdx, task);
updateTaskMovement(task, true);
}
final void startActivityLocked(ActivityRecord r, boolean newTask, boolean keepCurTransition,
ActivityOptions options) {
TaskRecord rTask = r.task;
final int taskId = rTask.taskId;
// mLaunchTaskBehind tasks get placed at the back of the task stack.
if (!r.mLaunchTaskBehind && (taskForIdLocked(taskId) == null || newTask)) {
// Last activity in task had been removed or ActivityManagerService is reusing task.
// Insert or replace.
// Might not even be in.
insertTaskAtTop(rTask, r);
mWindowManager.moveTaskToTop(taskId);
}
TaskRecord task = null;
if (!newTask) {
// If starting in an existing task, find where that is...
boolean startIt = true;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
task = mTaskHistory.get(taskNdx);
if (task.getTopActivity() == null) {
// All activities in task are finishing.
continue;
}
if (task == r.task) {
// Here it is! Now, if this is not yet visible to the
// user, then just add it without starting; it will
// get started when the user navigates back to it.
if (!startIt) {
if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task "
+ task, new RuntimeException("here").fillInStackTrace());
task.addActivityToTop(r);
r.putInHistory();
addConfigOverride(r, task);
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
ActivityOptions.abort(options);
return;
}
break;
} else if (task.numFullscreen > 0) {
startIt = false;
}
}
}
// Place a new activity at top of stack, so it is next to interact
// with the user.
// If we are not placing the new activity frontmost, we do not want
// to deliver the onUserLeaving callback to the actual frontmost
// activity
if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) {
mStackSupervisor.mUserLeaving = false;
if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING,
"startActivity() behind front, mUserLeaving=false");
}
task = r.task;
// Slot the activity into the history stack and proceed
if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task,
new RuntimeException("here").fillInStackTrace());
task.addActivityToTop(r);
task.setFrontOfTask();
r.putInHistory();
if (!isHomeStack() || numActivities() > 0) {
// We want to show the starting preview window if we are
// switching to a new task, or the next activity's process is
// not currently running.
boolean showStartingIcon = newTask;
ProcessRecord proc = r.app;
if (proc == null) {
proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid);
}
if (proc == null || proc.thread == null) {
showStartingIcon = true;
}
if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION,
"Prepare open transition: starting " + r);
if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) {
mWindowManager.prepareAppTransition(TRANSIT_NONE, keepCurTransition);
mNoAnimActivities.add(r);
} else {
mWindowManager.prepareAppTransition(newTask
? r.mLaunchTaskBehind
? TRANSIT_TASK_OPEN_BEHIND
: TRANSIT_TASK_OPEN
: TRANSIT_ACTIVITY_OPEN, keepCurTransition);
mNoAnimActivities.remove(r);
}
addConfigOverride(r, task);
boolean doShow = true;
if (newTask) {
// Even though this activity is starting fresh, we still need
// to reset it to make sure we apply affinities to move any
// existing activities from other tasks in to it.
// If the caller has requested that the target task be
// reset, then do so.
if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) {
resetTaskIfNeededLocked(r, r);
doShow = topRunningNonDelayedActivityLocked(null) == r;
}
} else if (options != null && options.getAnimationType()
== ActivityOptions.ANIM_SCENE_TRANSITION) {
doShow = false;
}
if (r.mLaunchTaskBehind) {
// Don't do a starting window for mLaunchTaskBehind. More importantly make sure we
// tell WindowManager that r is visible even though it is at the back of the stack.
mWindowManager.setAppVisibility(r.appToken, true);
ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS);
} else if (SHOW_APP_STARTING_PREVIEW && doShow) {
// Figure out if we are transitioning from another activity that is
// "has the same starting icon" as the next one. This allows the
// window manager to keep the previous window it had previously
// created, if it still had one.
ActivityRecord prev = r.task.topRunningActivityWithStartingWindowLocked();
if (prev != null) {
// We don't want to reuse the previous starting preview if:
// (1) The current activity is in a different task.
if (prev.task != r.task) {
prev = null;
}
// (2) The current activity is already displayed.
else if (prev.nowVisible) {
prev = null;
}
}
r.showStartingWindow(prev, showStartingIcon);
}
} else {
// If this is the first activity, don't do any fancy animations,
// because there is nothing for it to animate on top of.
addConfigOverride(r, task);
ActivityOptions.abort(options);
options = null;
}
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
}
final void validateAppTokensLocked() {
mValidateAppTokens.clear();
mValidateAppTokens.ensureCapacity(numActivities());
final int numTasks = mTaskHistory.size();
for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) {
TaskRecord task = mTaskHistory.get(taskNdx);
final ArrayList<ActivityRecord> activities = task.mActivities;
if (activities.isEmpty()) {
continue;
}
TaskGroup group = new TaskGroup();
group.taskId = task.taskId;
mValidateAppTokens.add(group);
final int numActivities = activities.size();
for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
group.tokens.add(r.appToken);
}
}
mWindowManager.validateAppTokens(mStackId, mValidateAppTokens);
}
/**
* Perform a reset of the given task, if needed as part of launching it.
* Returns the new HistoryRecord at the top of the task.
*/
/**
* Helper method for #resetTaskIfNeededLocked.
* We are inside of the task being reset... we'll either finish this activity, push it out
* for another task, or leave it as-is.
* @param task The task containing the Activity (taskTop) that might be reset.
* @param forceReset
* @return An ActivityOptions that needs to be processed.
*/
final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) {
ActivityOptions topOptions = null;
int replyChainEnd = -1;
boolean canMoveOptions = true;
// We only do this for activities that are not the root of the task (since if we finish
// the root, we may no longer have the task!).
final ArrayList<ActivityRecord> activities = task.mActivities;
final int numActivities = activities.size();
final int rootActivityNdx = task.findEffectiveRootIndex();
for (int i = numActivities - 1; i > rootActivityNdx; --i ) {
ActivityRecord target = activities.get(i);
if (target.frontOfTask)
break;
final int flags = target.info.flags;
final boolean finishOnTaskLaunch =
(flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0;
final boolean allowTaskReparenting =
(flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0;
final boolean clearWhenTaskReset =
(target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0;
if (!finishOnTaskLaunch
&& !clearWhenTaskReset
&& target.resultTo != null) {
// If this activity is sending a reply to a previous
// activity, we can't do anything with it now until
// we reach the start of the reply chain.
// XXX note that we are assuming the result is always
// to the previous activity, which is almost always
// the case but we really shouldn't count on.
if (replyChainEnd < 0) {
replyChainEnd = i;
}
} else if (!finishOnTaskLaunch
&& !clearWhenTaskReset
&& allowTaskReparenting
&& target.taskAffinity != null
&& !target.taskAffinity.equals(task.affinity)) {
// If this activity has an affinity for another
// task, then we need to move it out of here. We will
// move it as far out of the way as possible, to the
// bottom of the activity stack. This also keeps it
// correctly ordered with any activities we previously
// moved.
final TaskRecord targetTask;
final ActivityRecord bottom =
!mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ?
mTaskHistory.get(0).mActivities.get(0) : null;
if (bottom != null && target.taskAffinity != null
&& target.taskAffinity.equals(bottom.task.affinity)) {
// If the activity currently at the bottom has the
// same task affinity as the one we are moving,
// then merge it into the same task.
targetTask = bottom.task;
if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Start pushing activity " + target
+ " out to bottom task " + bottom.task);
} else {
targetTask = createTaskRecord(
mStackSupervisor.getNextTaskIdForUserLocked(target.userId),
target.info, null, null, null, false);
targetTask.affinityIntent = target.intent;
if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Start pushing activity " + target
+ " out to new task " + target.task);
}
setAppTask(target, targetTask);
boolean noOptions = canMoveOptions;
final int start = replyChainEnd < 0 ? i : replyChainEnd;
for (int srcPos = start; srcPos >= i; --srcPos) {
final ActivityRecord p = activities.get(srcPos);
if (p.finishing) {
continue;
}
canMoveOptions = false;
if (noOptions && topOptions == null) {
topOptions = p.takeOptionsLocked();
if (topOptions != null) {
noOptions = false;
}
}
if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE,
"Removing activity " + p + " from task=" + task + " adding to task="
+ targetTask + " Callers=" + Debug.getCallers(4));
if (DEBUG_TASKS) Slog.v(TAG_TASKS,
"Pushing next activity " + p + " out to target's task " + target.task);
p.setTask(targetTask, null);
targetTask.addActivityAtBottom(p);
setAppTask(p, targetTask);
}
mWindowManager.moveTaskToBottom(targetTask.taskId);
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
replyChainEnd = -1;
} else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) {
// If the activity should just be removed -- either
// because it asks for it, or the task should be
// cleared -- then finish it and anything that is
// part of its reply chain.
int end;
if (clearWhenTaskReset) {
// In this case, we want to finish this activity
// and everything above it, so be sneaky and pretend
// like these are all in the reply chain.
end = activities.size() - 1;
} else if (replyChainEnd < 0) {
end = i;
} else {
end = replyChainEnd;
}
boolean noOptions = canMoveOptions;
for (int srcPos = i; srcPos <= end; srcPos++) {
ActivityRecord p = activities.get(srcPos);
if (p.finishing) {
continue;
}
canMoveOptions = false;
if (noOptions && topOptions == null) {
topOptions = p.takeOptionsLocked();
if (topOptions != null) {
noOptions = false;
}
}
if (DEBUG_TASKS) Slog.w(TAG_TASKS,
"resetTaskIntendedTask: calling finishActivity on " + p);
if (finishActivityLocked(
p, Activity.RESULT_CANCELED, null, "reset-task", false)) {
end--;
srcPos--;
}
}
replyChainEnd = -1;
} else {
// If we were in the middle of a chain, well the
// activity that started it all doesn't want anything
// special, so leave it all as-is.
replyChainEnd = -1;
}
}
return topOptions;
}
/**
* Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given
* TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop.
* @param affinityTask The task we are looking for an affinity to.
* @param task Task that resetTaskIfNeededLocked.taskTop belongs to.
* @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked.
* @param forceReset Flag passed in to resetTaskIfNeededLocked.
*/
private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task,
boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) {
int replyChainEnd = -1;
final int taskId = task.taskId;
final String taskAffinity = task.affinity;
final ArrayList<ActivityRecord> activities = affinityTask.mActivities;
final int numActivities = activities.size();
final int rootActivityNdx = affinityTask.findEffectiveRootIndex();
// Do not operate on or below the effective root Activity.
for (int i = numActivities - 1; i > rootActivityNdx; --i) {
ActivityRecord target = activities.get(i);
if (target.frontOfTask)
break;
final int flags = target.info.flags;
boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0;
boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0;
if (target.resultTo != null) {
// If this activity is sending a reply to a previous
// activity, we can't do anything with it now until
// we reach the start of the reply chain.
// XXX note that we are assuming the result is always
// to the previous activity, which is almost always
// the case but we really shouldn't count on.
if (replyChainEnd < 0) {
replyChainEnd = i;
}
} else if (topTaskIsHigher
&& allowTaskReparenting
&& taskAffinity != null
&& taskAffinity.equals(target.taskAffinity)) {
// This activity has an affinity for our task. Either remove it if we are
// clearing or move it over to our task. Note that
// we currently punt on the case where we are resetting a
// task that is not at the top but who has activities above
// with an affinity to it... this is really not a normal
// case, and we will need to later pull that task to the front
// and usually at that point we will do the reset and pick
// up those remaining activities. (This only happens if
// someone starts an activity in a new task from an activity
// in a task that is not currently on top.)
if (forceReset || finishOnTaskLaunch) {
final int start = replyChainEnd >= 0 ? replyChainEnd : i;
if (DEBUG_TASKS) Slog.v(TAG_TASKS,
"Finishing task at index " + start + " to " + i);
for (int srcPos = start; srcPos >= i; --srcPos) {
final ActivityRecord p = activities.get(srcPos);
if (p.finishing) {
continue;
}
finishActivityLocked(
p, Activity.RESULT_CANCELED, null, "move-affinity", false);
}
} else {
if (taskInsertionPoint < 0) {
taskInsertionPoint = task.mActivities.size();
}
final int start = replyChainEnd >= 0 ? replyChainEnd : i;
if (DEBUG_TASKS) Slog.v(TAG_TASKS,
"Reparenting from task=" + affinityTask + ":" + start + "-" + i
+ " to task=" + task + ":" + taskInsertionPoint);
for (int srcPos = start; srcPos >= i; --srcPos) {
final ActivityRecord p = activities.get(srcPos);
p.setTask(task, null);
task.addActivityAtIndex(taskInsertionPoint, p);
if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE,
"Removing and adding activity " + p + " to stack at " + task
+ " callers=" + Debug.getCallers(3));
if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Pulling activity " + p
+ " from " + srcPos + " in to resetting task " + task);
setAppTask(p, task);
}
mWindowManager.moveTaskToTop(taskId);
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
// Now we've moved it in to place... but what if this is
// a singleTop activity and we have put it on top of another
// instance of the same activity? Then we drop the instance
// below so it remains singleTop.
if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) {
ArrayList<ActivityRecord> taskActivities = task.mActivities;
int targetNdx = taskActivities.indexOf(target);
if (targetNdx > 0) {
ActivityRecord p = taskActivities.get(targetNdx - 1);
if (p.intent.getComponent().equals(target.intent.getComponent())) {
finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace",
false);
}
}
}
}
replyChainEnd = -1;
}
}
return taskInsertionPoint;
}
final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop,
ActivityRecord newActivity) {
boolean forceReset =
(newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0;
if (ACTIVITY_INACTIVE_RESET_TIME > 0
&& taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) {
if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) {
forceReset = true;
}
}
final TaskRecord task = taskTop.task;
/** False until we evaluate the TaskRecord associated with taskTop. Switches to true
* for remaining tasks. Used for later tasks to reparent to task. */
boolean taskFound = false;
/** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */
ActivityOptions topOptions = null;
// Preserve the location for reparenting in the new task.
int reparentInsertionPoint = -1;
for (int i = mTaskHistory.size() - 1; i >= 0; --i) {
final TaskRecord targetTask = mTaskHistory.get(i);
if (targetTask == task) {
topOptions = resetTargetTaskIfNeededLocked(task, forceReset);
taskFound = true;
} else {
reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task,
taskFound, forceReset, reparentInsertionPoint);
}
}
int taskNdx = mTaskHistory.indexOf(task);
if (taskNdx >= 0) {
do {
taskTop = mTaskHistory.get(taskNdx--).getTopActivity();
} while (taskTop == null && taskNdx >= 0);
}
if (topOptions != null) {
// If we got some ActivityOptions from an activity on top that
// was removed from the task, propagate them to the new real top.
if (taskTop != null) {
taskTop.updateOptionsLocked(topOptions);
} else {
topOptions.abort();
}
}
return taskTop;
}
void sendActivityResultLocked(int callingUid, ActivityRecord r,
String resultWho, int requestCode, int resultCode, Intent data) {
if (callingUid > 0) {
mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName,
data, r.getUriPermissionsLocked(), r.userId);
}
if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r
+ " : who=" + resultWho + " req=" + requestCode
+ " res=" + resultCode + " data=" + data);
if (mResumedActivity == r && r.app != null && r.app.thread != null) {
try {
ArrayList<ResultInfo> list = new ArrayList<ResultInfo>();
list.add(new ResultInfo(resultWho, requestCode,
resultCode, data));
r.app.thread.scheduleSendResult(r.appToken, list);
return;
} catch (Exception e) {
Slog.w(TAG, "Exception thrown sending result to " + r, e);
}
}
r.addResultLocked(null, resultWho, requestCode, resultCode, data);
}
private void adjustFocusedActivityLocked(ActivityRecord r, String reason) {
if (!mStackSupervisor.isFocusedStack(this) || mService.mFocusedActivity != r) {
return;
}
final ActivityRecord next = topRunningActivityLocked();
final String myReason = reason + " adjustFocus";
if (next != r) {
if (next != null && StackId.keepFocusInStackIfPossible(mStackId) && isFocusable()) {
// For freeform, docked, and pinned stacks we always keep the focus within the
// stack as long as there is a running activity in the stack that we can adjust
// focus to.
mService.setFocusedActivityLocked(next, myReason);
return;
} else {
final TaskRecord task = r.task;
if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) {
final int taskToReturnTo = task.getTaskToReturnTo();
// For non-fullscreen stack, we want to move the focus to the next visible
// stack to prevent the home screen from moving to the top and obscuring
// other visible stacks.
if (!mFullscreen
&& adjustFocusToNextFocusableStackLocked(taskToReturnTo, myReason)) {
return;
}
// Move the home stack to the top if this stack is fullscreen or there is no
// other visible stack.
if (mStackSupervisor.moveHomeStackTaskToTop(taskToReturnTo, myReason)) {
// Activity focus was already adjusted. Nothing else to do...
return;
}
}
}
}
mService.setFocusedActivityLocked(mStackSupervisor.topRunningActivityLocked(), myReason);
}
private boolean adjustFocusToNextFocusableStackLocked(int taskToReturnTo, String reason) {
final ActivityStack stack = getNextFocusableStackLocked();
final String myReason = reason + " adjustFocusToNextFocusableStack";
if (stack == null) {
return false;
}
final ActivityRecord top = stack.topRunningActivityLocked();
if (stack.isHomeStack() && (top == null || !top.visible)) {
// If we will be focusing on the home stack next and its current top activity isn't
// visible, then use the task return to value to determine the home task to display next.
return mStackSupervisor.moveHomeStackTaskToTop(taskToReturnTo, reason);
}
return mService.setFocusedActivityLocked(top, myReason);
}
final void stopActivityLocked(ActivityRecord r) {
if (DEBUG_SWITCH) Slog.d(TAG_SWITCH, "Stopping: " + r);
if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0
|| (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) {
if (!r.finishing) {
if (!mService.isSleepingLocked()) {
if (DEBUG_STATES) Slog.d(TAG_STATES, "no-history finish of " + r);
if (requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null,
"stop-no-history", false)) {
// Activity was finished, no need to continue trying to schedule stop.
adjustFocusedActivityLocked(r, "stopActivityFinished");
r.resumeKeyDispatchingLocked();
return;
}
} else {
if (DEBUG_STATES) Slog.d(TAG_STATES, "Not finishing noHistory " + r
+ " on stop because we're just sleeping");
}
}
}
if (r.app != null && r.app.thread != null) {
adjustFocusedActivityLocked(r, "stopActivity");
r.resumeKeyDispatchingLocked();
try {
r.stopped = false;
if (DEBUG_STATES) Slog.v(TAG_STATES,
"Moving to STOPPING: " + r + " (stop requested)");
r.state = ActivityState.STOPPING;
if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY,
"Stopping visible=" + r.visible + " for " + r);
if (!r.visible) {
mWindowManager.setAppVisibility(r.appToken, false);
}
EventLogTags.writeAmStopActivity(
r.userId, System.identityHashCode(r), r.shortComponentName);
r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags);
if (mService.isSleepingOrShuttingDownLocked()) {
r.setSleeping(true);
}
Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r);
mHandler.sendMessageDelayed(msg, STOP_TIMEOUT);
} catch (Exception e) {
// Maybe just ignore exceptions here... if the process
// has crashed, our death notification will clean things
// up.
Slog.w(TAG, "Exception thrown during pause", e);
// Just in case, assume it to be stopped.
r.stopped = true;
if (DEBUG_STATES) Slog.v(TAG_STATES, "Stop failed; moving to STOPPED: " + r);
r.state = ActivityState.STOPPED;
if (r.deferRelaunchUntilPaused) {
destroyActivityLocked(r, true, "stop-except");
}
}
}
}
/**
* @return Returns true if the activity is being finished, false if for
* some reason it is being left as-is.
*/
final boolean requestFinishActivityLocked(IBinder token, int resultCode,
Intent resultData, String reason, boolean oomAdj) {
ActivityRecord r = isInStackLocked(token);
if (DEBUG_RESULTS || DEBUG_STATES) Slog.v(TAG_STATES,
"Finishing activity token=" + token + " r="
+ ", result=" + resultCode + ", data=" + resultData
+ ", reason=" + reason);
if (r == null) {
return false;
}
finishActivityLocked(r, resultCode, resultData, reason, oomAdj);
return true;
}
final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
ActivityRecord r = activities.get(activityNdx);
if (r.resultTo == self && r.requestCode == requestCode) {
if ((r.resultWho == null && resultWho == null) ||
(r.resultWho != null && r.resultWho.equals(resultWho))) {
finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub",
false);
}
}
}
}
mService.updateOomAdjLocked();
}
final TaskRecord finishTopRunningActivityLocked(ProcessRecord app, String reason) {
ActivityRecord r = topRunningActivityLocked();
TaskRecord finishedTask = null;
if (r == null || r.app != app) {
return null;
}
Slog.w(TAG, " Force finishing activity "
+ r.intent.getComponent().flattenToShortString());
int taskNdx = mTaskHistory.indexOf(r.task);
int activityNdx = r.task.mActivities.indexOf(r);
finishActivityLocked(r, Activity.RESULT_CANCELED, null, reason, false);
finishedTask = r.task;
// Also terminate any activities below it that aren't yet
// stopped, to avoid a situation where one will get
// re-start our crashing activity once it gets resumed again.
--activityNdx;
if (activityNdx < 0) {
do {
--taskNdx;
if (taskNdx < 0) {
break;
}
activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1;
} while (activityNdx < 0);
}
if (activityNdx >= 0) {
r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx);
if (r.state == ActivityState.RESUMED
|| r.state == ActivityState.PAUSING
|| r.state == ActivityState.PAUSED) {
if (!r.isHomeActivity() || mService.mHomeProcess != r.app) {
Slog.w(TAG, " Force finishing activity "
+ r.intent.getComponent().flattenToShortString());
finishActivityLocked(r, Activity.RESULT_CANCELED, null, reason, false);
}
}
}
return finishedTask;
}
final void finishVoiceTask(IVoiceInteractionSession session) {
IBinder sessionBinder = session.asBinder();
boolean didOne = false;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
TaskRecord tr = mTaskHistory.get(taskNdx);
if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) {
for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) {
ActivityRecord r = tr.mActivities.get(activityNdx);
if (!r.finishing) {
finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice",
false);
didOne = true;
}
}
} else {
// Check if any of the activities are using voice
for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) {
ActivityRecord r = tr.mActivities.get(activityNdx);
if (r.voiceSession != null
&& r.voiceSession.asBinder() == sessionBinder) {
// Inform of cancellation
r.clearVoiceSessionLocked();
try {
r.app.thread.scheduleLocalVoiceInteractionStarted((IBinder) r.appToken,
null);
} catch (RemoteException re) {
// Ok
}
mService.finishRunningVoiceLocked();
break;
}
}
}
}
if (didOne) {
mService.updateOomAdjLocked();
}
}
final boolean finishActivityAffinityLocked(ActivityRecord r) {
ArrayList<ActivityRecord> activities = r.task.mActivities;
for (int index = activities.indexOf(r); index >= 0; --index) {
ActivityRecord cur = activities.get(index);
if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) {
break;
}
finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true);
}
return true;
}
final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) {
// send the result
ActivityRecord resultTo = r.resultTo;
if (resultTo != null) {
if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, "Adding result to " + resultTo
+ " who=" + r.resultWho + " req=" + r.requestCode
+ " res=" + resultCode + " data=" + resultData);
if (resultTo.userId != r.userId) {
if (resultData != null) {
resultData.prepareToLeaveUser(r.userId);
}
}
if (r.info.applicationInfo.uid > 0) {
mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid,
resultTo.packageName, resultData,
resultTo.getUriPermissionsLocked(), resultTo.userId);
}
resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode,
resultData);
r.resultTo = null;
}
else if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, "No result destination from " + r);
// Make sure this HistoryRecord is not holding on to other resources,
// because clients have remote IPC references to this object so we
// can't assume that will go away and want to avoid circular IPC refs.
r.results = null;
r.pendingResults = null;
r.newIntents = null;
r.icicle = null;
}
/**
* @return Returns true if this activity has been removed from the history
* list, or false if it is still in the list and will be removed later.
*/
final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData,
String reason, boolean oomAdj) {
if (r.finishing) {
Slog.w(TAG, "Duplicate finish request for " + r);
return false;
}
r.makeFinishingLocked();
final TaskRecord task = r.task;
EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY,
r.userId, System.identityHashCode(r),
task.taskId, r.shortComponentName, reason);
final ArrayList<ActivityRecord> activities = task.mActivities;
final int index = activities.indexOf(r);
if (index < (activities.size() - 1)) {
task.setFrontOfTask();
if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) {
// If the caller asked that this activity (and all above it)
// be cleared when the task is reset, don't lose that information,
// but propagate it up to the next activity.
ActivityRecord next = activities.get(index+1);
next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
}
}
r.pauseKeyDispatchingLocked();
adjustFocusedActivityLocked(r, "finishActivity");
finishActivityResultsLocked(r, resultCode, resultData);
final boolean endTask = index <= 0;
final int transit = endTask ? TRANSIT_TASK_CLOSE : TRANSIT_ACTIVITY_CLOSE;
if (mResumedActivity == r) {
if (DEBUG_VISIBILITY || DEBUG_TRANSITION) Slog.v(TAG_TRANSITION,
"Prepare close transition: finishing " + r);
mWindowManager.prepareAppTransition(transit, false);
// Tell window manager to prepare for this one to be removed.
mWindowManager.setAppVisibility(r.appToken, false);
if (mPausingActivity == null) {
if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish needs to pause: " + r);
if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING,
"finish() => pause with userLeaving=false");
startPausingLocked(false, false, null, false);
}
if (endTask) {
mStackSupervisor.removeLockedTaskLocked(task);
}
} else if (r.state != ActivityState.PAUSING) {
// If the activity is PAUSING, we will complete the finish once
// it is done pausing; else we can just directly finish it here.
if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish not pausing: " + r);
if (r.visible) {
mWindowManager.prepareAppTransition(transit, false);
mWindowManager.setAppVisibility(r.appToken, false);
mWindowManager.executeAppTransition();
if (!mStackSupervisor.mWaitingVisibleActivities.contains(r)) {
mStackSupervisor.mWaitingVisibleActivities.add(r);
}
}
return finishCurrentActivityLocked(r, (r.visible || r.nowVisible) ?
FINISH_AFTER_VISIBLE : FINISH_AFTER_PAUSE, oomAdj) == null;
} else {
if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish waiting for pause of: " + r);
}
return false;
}
static final int FINISH_IMMEDIATELY = 0;
static final int FINISH_AFTER_PAUSE = 1;
static final int FINISH_AFTER_VISIBLE = 2;
final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) {
// First things first: if this activity is currently visible,
// and the resumed activity is not yet visible, then hold off on
// finishing until the resumed one becomes visible.
final ActivityRecord next = mStackSupervisor.topRunningActivityLocked();
if (mode == FINISH_AFTER_VISIBLE && (r.visible || r.nowVisible)
&& next != null && !next.nowVisible) {
if (!mStackSupervisor.mStoppingActivities.contains(r)) {
addToStopping(r, false /* immediate */);
}
if (DEBUG_STATES) Slog.v(TAG_STATES,
"Moving to STOPPING: "+ r + " (finish requested)");
r.state = ActivityState.STOPPING;
if (oomAdj) {
mService.updateOomAdjLocked();
}
return r;
}
// make sure the record is cleaned out of other places.
mStackSupervisor.mStoppingActivities.remove(r);
mStackSupervisor.mGoingToSleepActivities.remove(r);
mStackSupervisor.mWaitingVisibleActivities.remove(r);
if (mResumedActivity == r) {
mResumedActivity = null;
}
final ActivityState prevState = r.state;
if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to FINISHING: " + r);
r.state = ActivityState.FINISHING;
final boolean finishingActivityInNonFocusedStack
= r.task.stack != mStackSupervisor.getFocusedStack()
&& prevState == ActivityState.PAUSED && mode == FINISH_AFTER_VISIBLE;
if (mode == FINISH_IMMEDIATELY
|| (prevState == ActivityState.PAUSED
&& (mode == FINISH_AFTER_PAUSE || mStackId == PINNED_STACK_ID))
|| finishingActivityInNonFocusedStack
|| prevState == ActivityState.STOPPED
|| prevState == ActivityState.INITIALIZING) {
r.makeFinishingLocked();
boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm");
if (finishingActivityInNonFocusedStack) {
// Finishing activity that was in paused state and it was in not currently focused
// stack, need to make something visible in its place.
mStackSupervisor.ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS);
}
if (activityRemoved) {
mStackSupervisor.resumeFocusedStackTopActivityLocked();
}
if (DEBUG_CONTAINERS) Slog.d(TAG_CONTAINERS,
"destroyActivityLocked: finishCurrentActivityLocked r=" + r +
" destroy returned removed=" + activityRemoved);
return activityRemoved ? null : r;
}
// Need to go through the full pause cycle to get this
// activity into the stopped state and then finish it.
if (DEBUG_ALL) Slog.v(TAG, "Enqueueing pending finish: " + r);
mStackSupervisor.mFinishingActivities.add(r);
r.resumeKeyDispatchingLocked();
mStackSupervisor.resumeFocusedStackTopActivityLocked();
return r;
}
void finishAllActivitiesLocked(boolean immediately) {
boolean noActivitiesInStack = true;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
noActivitiesInStack = false;
if (r.finishing && !immediately) {
continue;
}
Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately");
finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false);
}
}
if (noActivitiesInStack) {
mActivityContainer.onTaskListEmptyLocked();
}
}
final boolean shouldUpRecreateTaskLocked(ActivityRecord srec, String destAffinity) {
// Basic case: for simple app-centric recents, we need to recreate
// the task if the affinity has changed.
if (srec == null || srec.task.affinity == null ||
!srec.task.affinity.equals(destAffinity)) {
return true;
}
// Document-centric case: an app may be split in to multiple documents;
// they need to re-create their task if this current activity is the root
// of a document, unless simply finishing it will return them to the the
// correct app behind.
if (srec.frontOfTask && srec.task != null && srec.task.getBaseIntent() != null
&& srec.task.getBaseIntent().isDocument()) {
// Okay, this activity is at the root of its task. What to do, what to do...
if (srec.task.getTaskToReturnTo() != ActivityRecord.APPLICATION_ACTIVITY_TYPE) {
// Finishing won't return to an application, so we need to recreate.
return true;
}
// We now need to get the task below it to determine what to do.
int taskIdx = mTaskHistory.indexOf(srec.task);
if (taskIdx <= 0) {
Slog.w(TAG, "shouldUpRecreateTask: task not in history for " + srec);
return false;
}
if (taskIdx == 0) {
// At the bottom of the stack, nothing to go back to.
return true;
}
TaskRecord prevTask = mTaskHistory.get(taskIdx);
if (!srec.task.affinity.equals(prevTask.affinity)) {
// These are different apps, so need to recreate.
return true;
}
}
return false;
}
final boolean navigateUpToLocked(ActivityRecord srec, Intent destIntent, int resultCode,
Intent resultData) {
final TaskRecord task = srec.task;
final ArrayList<ActivityRecord> activities = task.mActivities;
final int start = activities.indexOf(srec);
if (!mTaskHistory.contains(task) || (start < 0)) {
return false;
}
int finishTo = start - 1;
ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo);
boolean foundParentInTask = false;
final ComponentName dest = destIntent.getComponent();
if (start > 0 && dest != null) {
for (int i = finishTo; i >= 0; i--) {
ActivityRecord r = activities.get(i);
if (r.info.packageName.equals(dest.getPackageName()) &&
r.info.name.equals(dest.getClassName())) {
finishTo = i;
parent = r;
foundParentInTask = true;
break;
}
}
}
IActivityController controller = mService.mController;
if (controller != null) {
ActivityRecord next = topRunningActivityLocked(srec.appToken, 0);
if (next != null) {
// ask watcher if this is allowed
boolean resumeOK = true;
try {
resumeOK = controller.activityResuming(next.packageName);
} catch (RemoteException e) {
mService.mController = null;
Watchdog.getInstance().setActivityController(null);
}
if (!resumeOK) {
return false;
}
}
}
final long origId = Binder.clearCallingIdentity();
for (int i = start; i > finishTo; i--) {
ActivityRecord r = activities.get(i);
requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true);
// Only return the supplied result for the first activity finished
resultCode = Activity.RESULT_CANCELED;
resultData = null;
}
if (parent != null && foundParentInTask) {
final int parentLaunchMode = parent.info.launchMode;
final int destIntentFlags = destIntent.getFlags();
if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE ||
parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK ||
parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP ||
(destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) {
parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent,
srec.packageName);
} else {
try {
ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo(
destIntent.getComponent(), 0, srec.userId);
int res = mService.mActivityStarter.startActivityLocked(srec.app.thread,
destIntent, null /*ephemeralIntent*/, null, aInfo, null /*rInfo*/, null,
null, parent.appToken, null, 0, -1, parent.launchedFromUid,
parent.launchedFromPackage, -1, parent.launchedFromUid, 0, null,
false, true, null, null, null);
foundParentInTask = res == ActivityManager.START_SUCCESS;
} catch (RemoteException e) {
foundParentInTask = false;
}
requestFinishActivityLocked(parent.appToken, resultCode,
resultData, "navigate-top", true);
}
}
Binder.restoreCallingIdentity(origId);
return foundParentInTask;
}
/**
* Perform the common clean-up of an activity record. This is called both
* as part of destroyActivityLocked() (when destroying the client-side
* representation) and cleaning things up as a result of its hosting
* processing going away, in which case there is no remaining client-side
* state to destroy so only the cleanup here is needed.
*
* Note: Call before #removeActivityFromHistoryLocked.
*/
final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices,
boolean setState) {
if (mResumedActivity == r) {
mResumedActivity = null;
}
if (mPausingActivity == r) {
mPausingActivity = null;
}
mService.resetFocusedActivityIfNeededLocked(r);
r.deferRelaunchUntilPaused = false;
r.frozenBeforeDestroy = false;
if (setState) {
if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYED: " + r + " (cleaning up)");
r.state = ActivityState.DESTROYED;
if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during cleanUp for activity " + r);
r.app = null;
}
// Make sure this record is no longer in the pending finishes list.
// This could happen, for example, if we are trimming activities
// down to the max limit while they are still waiting to finish.
mStackSupervisor.mFinishingActivities.remove(r);
mStackSupervisor.mWaitingVisibleActivities.remove(r);
// Remove any pending results.
if (r.finishing && r.pendingResults != null) {
for (WeakReference<PendingIntentRecord> apr : r.pendingResults) {
PendingIntentRecord rec = apr.get();
if (rec != null) {
mService.cancelIntentSenderLocked(rec, false);
}
}
r.pendingResults = null;
}
if (cleanServices) {
cleanUpActivityServicesLocked(r);
}
// Get rid of any pending idle timeouts.
removeTimeoutsForActivityLocked(r);
if (getVisibleBehindActivity() == r) {
mStackSupervisor.requestVisibleBehindLocked(r, false);
}
// Clean-up activities are no longer relaunching (e.g. app process died). Notify window
// manager so it can update its bookkeeping.
mWindowManager.notifyAppRelaunchesCleared(r.appToken);
}
private void removeTimeoutsForActivityLocked(ActivityRecord r) {
mStackSupervisor.removeTimeoutsForActivityLocked(r);
mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r);
mHandler.removeMessages(STOP_TIMEOUT_MSG, r);
mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r);
r.finishLaunchTickingLocked();
}
private void removeActivityFromHistoryLocked(
ActivityRecord r, TaskRecord oldTop, String reason) {
mStackSupervisor.removeChildActivityContainers(r);
finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null);
r.makeFinishingLocked();
if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE,
"Removing activity " + r + " from stack callers=" + Debug.getCallers(5));
r.takeFromHistory();
removeTimeoutsForActivityLocked(r);
if (DEBUG_STATES) Slog.v(TAG_STATES,
"Moving to DESTROYED: " + r + " (removed from history)");
r.state = ActivityState.DESTROYED;
if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during remove for activity " + r);
r.app = null;
mWindowManager.removeAppToken(r.appToken);
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
final TaskRecord task = r.task;
final TaskRecord topTask = oldTop != null ? oldTop : topTask();
if (task != null && task.removeActivity(r)) {
if (DEBUG_STACK) Slog.i(TAG_STACK,
"removeActivityFromHistoryLocked: last activity removed from " + this);
if (mStackSupervisor.isFocusedStack(this) && task == topTask &&
task.isOverHomeStack()) {
mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo(), reason);
}
removeTask(task, reason);
}
cleanUpActivityServicesLocked(r);
r.removeUriPermissionsLocked();
}
/**
* Perform clean-up of service connections in an activity record.
*/
final void cleanUpActivityServicesLocked(ActivityRecord r) {
// Throw away any services that have been bound by this activity.
if (r.connections != null) {
Iterator<ConnectionRecord> it = r.connections.iterator();
while (it.hasNext()) {
ConnectionRecord c = it.next();
mService.mServices.removeConnectionLocked(c, null, r);
}
r.connections = null;
}
}
final void scheduleDestroyActivities(ProcessRecord owner, String reason) {
Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG);
msg.obj = new ScheduleDestroyArgs(owner, reason);
mHandler.sendMessage(msg);
}
final void destroyActivitiesLocked(ProcessRecord owner, String reason) {
boolean lastIsOpaque = false;
boolean activityRemoved = false;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if (r.finishing) {
continue;
}
if (r.fullscreen) {
lastIsOpaque = true;
}
if (owner != null && r.app != owner) {
continue;
}
if (!lastIsOpaque) {
continue;
}
if (r.isDestroyable()) {
if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Destroying " + r + " in state " + r.state
+ " resumed=" + mResumedActivity
+ " pausing=" + mPausingActivity + " for reason " + reason);
if (destroyActivityLocked(r, true, reason)) {
activityRemoved = true;
}
}
}
}
if (activityRemoved) {
mStackSupervisor.resumeFocusedStackTopActivityLocked();
}
}
final boolean safelyDestroyActivityLocked(ActivityRecord r, String reason) {
if (r.isDestroyable()) {
if (DEBUG_SWITCH) Slog.v(TAG_SWITCH,
"Destroying " + r + " in state " + r.state + " resumed=" + mResumedActivity
+ " pausing=" + mPausingActivity + " for reason " + reason);
return destroyActivityLocked(r, true, reason);
}
return false;
}
final int releaseSomeActivitiesLocked(ProcessRecord app, ArraySet<TaskRecord> tasks,
String reason) {
// Iterate over tasks starting at the back (oldest) first.
if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, "Trying to release some activities in " + app);
int maxTasks = tasks.size() / 4;
if (maxTasks < 1) {
maxTasks = 1;
}
int numReleased = 0;
for (int taskNdx = 0; taskNdx < mTaskHistory.size() && maxTasks > 0; taskNdx++) {
final TaskRecord task = mTaskHistory.get(taskNdx);
if (!tasks.contains(task)) {
continue;
}
if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, "Looking for activities to release in " + task);
int curNum = 0;
final ArrayList<ActivityRecord> activities = task.mActivities;
for (int actNdx = 0; actNdx < activities.size(); actNdx++) {
final ActivityRecord activity = activities.get(actNdx);
if (activity.app == app && activity.isDestroyable()) {
if (DEBUG_RELEASE) Slog.v(TAG_RELEASE, "Destroying " + activity
+ " in state " + activity.state + " resumed=" + mResumedActivity
+ " pausing=" + mPausingActivity + " for reason " + reason);
destroyActivityLocked(activity, true, reason);
if (activities.get(actNdx) != activity) {
// Was removed from list, back up so we don't miss the next one.
actNdx--;
}
curNum++;
}
}
if (curNum > 0) {
numReleased += curNum;
maxTasks--;
if (mTaskHistory.get(taskNdx) != task) {
// The entire task got removed, back up so we don't miss the next one.
taskNdx--;
}
}
}
if (DEBUG_RELEASE) Slog.d(TAG_RELEASE,
"Done releasing: did " + numReleased + " activities");
return numReleased;
}
/**
* Destroy the current CLIENT SIDE instance of an activity. This may be
* called both when actually finishing an activity, or when performing
* a configuration switch where we destroy the current client-side object
* but then create a new client-side object for this same HistoryRecord.
*/
final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) {
if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v(TAG_SWITCH,
"Removing activity from " + reason + ": token=" + r
+ ", app=" + (r.app != null ? r.app.processName : "(null)"));
EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY,
r.userId, System.identityHashCode(r),
r.task.taskId, r.shortComponentName, reason);
boolean removedFromHistory = false;
// If the activity is finishing, it's no longer considered in topRunningActivityLocked,
// and cleanUpActivityLocked() may change focus to another activity (or task).
// Get the current top task now, as removeActivityFromHistoryLocked() below need this
// to decide whether to return to home stack after removal.
final TaskRecord topTask = topTask();
cleanUpActivityLocked(r, false, false);
final boolean hadApp = r.app != null;
if (hadApp) {
if (removeFromApp) {
r.app.activities.remove(r);
if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) {
mService.mHeavyWeightProcess = null;
mService.mHandler.sendEmptyMessage(
ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG);
}
if (r.app.activities.isEmpty()) {
// Update any services we are bound to that might care about whether
// their client may have activities.
mService.mServices.updateServiceConnectionActivitiesLocked(r.app);
// No longer have activities, so update LRU list and oom adj.
mService.updateLruProcessLocked(r.app, false, null);
mService.updateOomAdjLocked();
}
}
boolean skipDestroy = false;
try {
if (DEBUG_SWITCH) Slog.i(TAG_SWITCH, "Destroying: " + r);
r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing,
r.configChangeFlags);
} catch (Exception e) {
// We can just ignore exceptions here... if the process
// has crashed, our death notification will clean things
// up.
//Slog.w(TAG, "Exception thrown during finish", e);
if (r.finishing) {
removeActivityFromHistoryLocked(
r, topTask, reason + " exceptionInScheduleDestroy");
removedFromHistory = true;
skipDestroy = true;
}
}
r.nowVisible = false;
// If the activity is finishing, we need to wait on removing it
// from the list to give it a chance to do its cleanup. During
// that time it may make calls back with its token so we need to
// be able to find it on the list and so we don't want to remove
// it from the list yet. Otherwise, we can just immediately put
// it in the destroyed state since we are not removing it from the
// list.
if (r.finishing && !skipDestroy) {
if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYING: " + r
+ " (destroy requested)");
r.state = ActivityState.DESTROYING;
Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r);
mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT);
} else {
if (DEBUG_STATES) Slog.v(TAG_STATES,
"Moving to DESTROYED: " + r + " (destroy skipped)");
r.state = ActivityState.DESTROYED;
if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during destroy for activity " + r);
r.app = null;
}
} else {
// remove this record from the history.
if (r.finishing) {
removeActivityFromHistoryLocked(r, topTask, reason + " hadNoApp");
removedFromHistory = true;
} else {
if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYED: " + r + " (no app)");
r.state = ActivityState.DESTROYED;
if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during destroy for activity " + r);
r.app = null;
}
}
r.configChangeFlags = 0;
if (!mLRUActivities.remove(r) && hadApp) {
Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list");
}
return removedFromHistory;
}
final void activityDestroyedLocked(IBinder token, String reason) {
final long origId = Binder.clearCallingIdentity();
try {
ActivityRecord r = ActivityRecord.forTokenLocked(token);
if (r != null) {
mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r);
}
if (DEBUG_CONTAINERS) Slog.d(TAG_CONTAINERS, "activityDestroyedLocked: r=" + r);
if (isInStackLocked(r) != null) {
if (r.state == ActivityState.DESTROYING) {
cleanUpActivityLocked(r, true, false);
removeActivityFromHistoryLocked(r, null, reason);
}
}
mStackSupervisor.resumeFocusedStackTopActivityLocked();
} finally {
Binder.restoreCallingIdentity(origId);
}
}
void releaseBackgroundResources(ActivityRecord r) {
if (hasVisibleBehindActivity() &&
!mHandler.hasMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG)) {
if (r == topRunningActivityLocked()
&& getStackVisibilityLocked(null) == STACK_VISIBLE) {
// Don't release the top activity if it has requested to run behind the next
// activity and the stack is currently visible.
return;
}
if (DEBUG_STATES) Slog.d(TAG_STATES, "releaseBackgroundResources activtyDisplay=" +
mActivityContainer.mActivityDisplay + " visibleBehind=" + r + " app=" + r.app +
" thread=" + r.app.thread);
if (r != null && r.app != null && r.app.thread != null) {
try {
r.app.thread.scheduleCancelVisibleBehind(r.appToken);
} catch (RemoteException e) {
}
mHandler.sendEmptyMessageDelayed(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG, 500);
} else {
Slog.e(TAG, "releaseBackgroundResources: activity " + r + " no longer running");
backgroundResourcesReleased();
}
}
}
final void backgroundResourcesReleased() {
mHandler.removeMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG);
final ActivityRecord r = getVisibleBehindActivity();
if (r != null) {
mStackSupervisor.mStoppingActivities.add(r);
setVisibleBehindActivity(null);
mStackSupervisor.scheduleIdleTimeoutLocked(null);
}
mStackSupervisor.resumeFocusedStackTopActivityLocked();
}
boolean hasVisibleBehindActivity() {
return isAttached() && mActivityContainer.mActivityDisplay.hasVisibleBehindActivity();
}
void setVisibleBehindActivity(ActivityRecord r) {
if (isAttached()) {
mActivityContainer.mActivityDisplay.setVisibleBehindActivity(r);
}
}
ActivityRecord getVisibleBehindActivity() {
return isAttached() ? mActivityContainer.mActivityDisplay.mVisibleBehindActivity : null;
}
private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list,
ProcessRecord app, String listName) {
int i = list.size();
if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP,
"Removing app " + app + " from list " + listName + " with " + i + " entries");
while (i > 0) {
i--;
ActivityRecord r = list.get(i);
if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "Record #" + i + " " + r);
if (r.app == app) {
if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "---> REMOVING this entry!");
list.remove(i);
removeTimeoutsForActivityLocked(r);
}
}
}
boolean removeHistoryRecordsForAppLocked(ProcessRecord app) {
removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities");
removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app,
"mStoppingActivities");
removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app,
"mGoingToSleepActivities");
removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app,
"mWaitingVisibleActivities");
removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app,
"mFinishingActivities");
boolean hasVisibleActivities = false;
// Clean out the history list.
int i = numActivities();
if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP,
"Removing app " + app + " from history with " + i + " entries");
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
--i;
if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP,
"Record #" + i + " " + r + ": app=" + r.app);
if (r.app == app) {
if (r.visible) {
hasVisibleActivities = true;
}
final boolean remove;
if ((!r.haveState && !r.stateNotNeeded) || r.finishing) {
// Don't currently have state for the activity, or
// it is finishing -- always remove it.
remove = true;
} else if (!r.visible && r.launchCount > 2 &&
r.lastLaunchTime > (SystemClock.uptimeMillis() - 60000)) {
// We have launched this activity too many times since it was
// able to run, so give up and remove it.
// (Note if the activity is visible, we don't remove the record.
// We leave the dead window on the screen but the process will
// not be restarted unless user explicitly tap on it.)
remove = true;
} else {
// The process may be gone, but the activity lives on!
remove = false;
}
if (remove) {
if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) Slog.i(TAG_ADD_REMOVE,
"Removing activity " + r + " from stack at " + i
+ ": haveState=" + r.haveState
+ " stateNotNeeded=" + r.stateNotNeeded
+ " finishing=" + r.finishing
+ " state=" + r.state + " callers=" + Debug.getCallers(5));
if (!r.finishing) {
Slog.w(TAG, "Force removing " + r + ": app died, no saved state");
EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY,
r.userId, System.identityHashCode(r),
r.task.taskId, r.shortComponentName,
"proc died without state saved");
if (r.state == ActivityState.RESUMED) {
mService.updateUsageStats(r, false);
}
}
} else {
// We have the current state for this activity, so
// it can be restarted later when needed.
if (DEBUG_ALL) Slog.v(TAG, "Keeping entry, setting app to null");
if (DEBUG_APP) Slog.v(TAG_APP,
"Clearing app during removeHistory for activity " + r);
r.app = null;
// Set nowVisible to previous visible state. If the app was visible while
// it died, we leave the dead window on screen so it's basically visible.
// This is needed when user later tap on the dead window, we need to stop
// other apps when user transfers focus to the restarted activity.
r.nowVisible = r.visible;
if (!r.haveState) {
if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE,
"App died, clearing saved state of " + r);
r.icicle = null;
}
}
cleanUpActivityLocked(r, true, true);
if (remove) {
removeActivityFromHistoryLocked(r, null, "appDied");
}
}
}
}
return hasVisibleActivities;
}
final void updateTransitLocked(int transit, ActivityOptions options) {
if (options != null) {
ActivityRecord r = topRunningActivityLocked();
if (r != null && r.state != ActivityState.RESUMED) {
r.updateOptionsLocked(options);
} else {
ActivityOptions.abort(options);
}
}
mWindowManager.prepareAppTransition(transit, false);
}
void updateTaskMovement(TaskRecord task, boolean toFront) {
if (task.isPersistable) {
task.mLastTimeMoved = System.currentTimeMillis();
// Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most
// recently will be most negative, tasks sent to the bottom before that will be less
// negative. Similarly for recent tasks moved to the top which will be most positive.
if (!toFront) {
task.mLastTimeMoved *= -1;
}
}
mStackSupervisor.invalidateTaskLayers();
}
void moveHomeStackTaskToTop(int homeStackTaskType) {
final int top = mTaskHistory.size() - 1;
for (int taskNdx = top; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
if (task.taskType == homeStackTaskType) {
if (DEBUG_TASKS || DEBUG_STACK) Slog.d(TAG_STACK,
"moveHomeStackTaskToTop: moving " + task);
mTaskHistory.remove(taskNdx);
mTaskHistory.add(top, task);
updateTaskMovement(task, true);
return;
}
}
}
final void moveTaskToFrontLocked(TaskRecord tr, boolean noAnimation, ActivityOptions options,
AppTimeTracker timeTracker, String reason) {
if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "moveTaskToFront: " + tr);
final int numTasks = mTaskHistory.size();
final int index = mTaskHistory.indexOf(tr);
if (numTasks == 0 || index < 0) {
// nothing to do!
if (noAnimation) {
ActivityOptions.abort(options);
} else {
updateTransitLocked(TRANSIT_TASK_TO_FRONT, options);
}
return;
}
if (timeTracker != null) {
// The caller wants a time tracker associated with this task.
for (int i = tr.mActivities.size() - 1; i >= 0; i--) {
tr.mActivities.get(i).appTimeTracker = timeTracker;
}
}
// Shift all activities with this task up to the top
// of the stack, keeping them in the same internal order.
insertTaskAtTop(tr, null);
// Don't refocus if invisible to current user
ActivityRecord top = tr.getTopActivity();
if (!okToShowLocked(top)) {
addRecentActivityLocked(top);
ActivityOptions.abort(options);
return;
}
// Set focus to the top running activity of this stack.
ActivityRecord r = topRunningActivityLocked();
mService.setFocusedActivityLocked(r, reason);
if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare to front transition: task=" + tr);
if (noAnimation) {
mWindowManager.prepareAppTransition(TRANSIT_NONE, false);
if (r != null) {
mNoAnimActivities.add(r);
}
ActivityOptions.abort(options);
} else {
updateTransitLocked(TRANSIT_TASK_TO_FRONT, options);
}
mStackSupervisor.resumeFocusedStackTopActivityLocked();
EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId);
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
}
/**
* Worker method for rearranging history stack. Implements the function of moving all
* activities for a specific task (gathering them if disjoint) into a single group at the
* bottom of the stack.
*
* If a watcher is installed, the action is preflighted and the watcher has an opportunity
* to premeptively cancel the move.
*
* @param taskId The taskId to collect and move to the bottom.
* @return Returns true if the move completed, false if not.
*/
final boolean moveTaskToBackLocked(int taskId) {
final TaskRecord tr = taskForIdLocked(taskId);
if (tr == null) {
Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId);
return false;
}
Slog.i(TAG, "moveTaskToBack: " + tr);
mStackSupervisor.removeLockedTaskLocked(tr);
// If we have a watcher, preflight the move before committing to it. First check
// for *other* available tasks, but if none are available, then try again allowing the
// current task to be selected.
if (mStackSupervisor.isFrontStack(this) && mService.mController != null) {
ActivityRecord next = topRunningActivityLocked(null, taskId);
if (next == null) {
next = topRunningActivityLocked(null, 0);
}
if (next != null) {
// ask watcher if this is allowed
boolean moveOK = true;
try {
moveOK = mService.mController.activityResuming(next.packageName);
} catch (RemoteException e) {
mService.mController = null;
Watchdog.getInstance().setActivityController(null);
}
if (!moveOK) {
return false;
}
}
}
if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare to back transition: task=" + taskId);
if (mStackId == HOME_STACK_ID && topTask().isHomeTask()) {
// For the case where we are moving the home task back and there is an activity visible
// behind it on the fullscreen stack, we want to move the focus to the visible behind
// activity to maintain order with what the user is seeing.
final ActivityStack fullscreenStack =
mStackSupervisor.getStack(FULLSCREEN_WORKSPACE_STACK_ID);
if (fullscreenStack != null && fullscreenStack.hasVisibleBehindActivity()) {
final ActivityRecord visibleBehind = fullscreenStack.getVisibleBehindActivity();
mService.setFocusedActivityLocked(visibleBehind, "moveHomeTaskToBack");
mStackSupervisor.resumeFocusedStackTopActivityLocked();
return true;
}
}
boolean prevIsHome = false;
// If true, we should resume the home activity next if the task we are moving to the
// back is over the home stack. We force to false if the task we are moving to back
// is the home task and we don't want it resumed after moving to the back.
final boolean canGoHome = !tr.isHomeTask() && tr.isOverHomeStack();
if (canGoHome) {
final TaskRecord nextTask = getNextTask(tr);
if (nextTask != null) {
nextTask.setTaskToReturnTo(tr.getTaskToReturnTo());
} else {
prevIsHome = true;
}
}
mTaskHistory.remove(tr);
mTaskHistory.add(0, tr);
updateTaskMovement(tr, false);
// There is an assumption that moving a task to the back moves it behind the home activity.
// We make sure here that some activity in the stack will launch home.
int numTasks = mTaskHistory.size();
for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
if (task.isOverHomeStack()) {
break;
}
if (taskNdx == 1) {
// Set the last task before tr to go to home.
task.setTaskToReturnTo(HOME_ACTIVITY_TYPE);
}
}
mWindowManager.prepareAppTransition(TRANSIT_TASK_TO_BACK, false);
mWindowManager.moveTaskToBottom(taskId);
if (VALIDATE_TOKENS) {
validateAppTokensLocked();
}
final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null;
if (prevIsHome || (task == tr && canGoHome) || (numTasks <= 1 && isOnHomeDisplay())) {
if (!mService.mBooting && !mService.mBooted) {
// Not ready yet!
return false;
}
final int taskToReturnTo = tr.getTaskToReturnTo();
tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE);
return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null,
"moveTaskToBackAndShowHome");
}
// Using currently focused activity value from service instead of mResumedActivity,
// because if this happens when device is locked the mResumedActivity will be null.
adjustFocusedActivityLocked(mService.mFocusedActivity, "moveTaskToBack");
mStackSupervisor.resumeFocusedStackTopActivityLocked();
return true;
}
static final void logStartActivity(int tag, ActivityRecord r,
TaskRecord task) {
final Uri data = r.intent.getData();
final String strData = data != null ? data.toSafeString() : null;
EventLog.writeEvent(tag,
r.userId, System.identityHashCode(r), task.taskId,
r.shortComponentName, r.intent.getAction(),
r.intent.getType(), strData, r.intent.getFlags());
}
/**
* Ensures all visible activities at or below the input activity have the right configuration.
*/
void ensureVisibleActivitiesConfigurationLocked(ActivityRecord start, boolean preserveWindow) {
if (start == null || !start.visible) {
return;
}
final TaskRecord startTask = start.task;
boolean behindFullscreen = false;
boolean updatedConfig = false;
for (int taskIndex = mTaskHistory.indexOf(startTask); taskIndex >= 0; --taskIndex) {
final TaskRecord task = mTaskHistory.get(taskIndex);
final ArrayList<ActivityRecord> activities = task.mActivities;
int activityIndex =
(start.task == task) ? activities.indexOf(start) : activities.size() - 1;
for (; activityIndex >= 0; --activityIndex) {
final ActivityRecord r = activities.get(activityIndex);
updatedConfig |= ensureActivityConfigurationLocked(r, 0, preserveWindow);
if (r.fullscreen) {
behindFullscreen = true;
break;
}
}
if (behindFullscreen) {
break;
}
}
if (updatedConfig) {
// Ensure the resumed state of the focus activity if we updated the configuration of
// any activity.
mStackSupervisor.resumeFocusedStackTopActivityLocked();
}
}
/**
* Make sure the given activity matches the current configuration. Returns false if the activity
* had to be destroyed. Returns true if the configuration is the same, or the activity will
* remain running as-is for whatever reason. Ensures the HistoryRecord is updated with the
* correct configuration and all other bookkeeping is handled.
*/
boolean ensureActivityConfigurationLocked(
ActivityRecord r, int globalChanges, boolean preserveWindow) {
if (mConfigWillChange) {
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
"Skipping config check (will change): " + r);
return true;
}
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
"Ensuring correct configuration: " + r);
// Short circuit: if the two configurations are equal (the common case), then there is
// nothing to do.
final Configuration newConfig = mService.mConfiguration;
r.task.sanitizeOverrideConfiguration(newConfig);
final Configuration taskConfig = r.task.mOverrideConfig;
if (r.configuration.equals(newConfig)
&& r.taskConfigOverride.equals(taskConfig)
&& !r.forceNewConfig) {
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
"Configuration unchanged in " + r);
return true;
}
// We don't worry about activities that are finishing.
if (r.finishing) {
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
"Configuration doesn't matter in finishing " + r);
r.stopFreezingScreenLocked(false);
return true;
}
// Okay we now are going to make this activity have the new config.
// But then we need to figure out how it needs to deal with that.
final Configuration oldConfig = r.configuration;
final Configuration oldTaskOverride = r.taskConfigOverride;
r.configuration = newConfig;
r.taskConfigOverride = taskConfig;
int taskChanges = getTaskConfigurationChanges(r, taskConfig, oldTaskOverride);
final int changes = oldConfig.diff(newConfig) | taskChanges;
if (changes == 0 && !r.forceNewConfig) {
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
"Configuration no differences in " + r);
// There are no significant differences, so we won't relaunch but should still deliver
// the new configuration to the client process.
r.scheduleConfigurationChanged(taskConfig, true);
return true;
}
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
"Configuration changes for " + r + " ; taskChanges="
+ Configuration.configurationDiffToString(taskChanges) + ", allChanges="
+ Configuration.configurationDiffToString(changes));
// If the activity isn't currently running, just leave the new
// configuration and it will pick that up next time it starts.
if (r.app == null || r.app.thread == null) {
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
"Configuration doesn't matter not running " + r);
r.stopFreezingScreenLocked(false);
r.forceNewConfig = false;
return true;
}
// Figure out how to handle the changes between the configurations.
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
"Checking to restart " + r.info.name + ": changed=0x"
+ Integer.toHexString(changes) + ", handles=0x"
+ Integer.toHexString(r.info.getRealConfigChanged()) + ", newConfig=" + newConfig
+ ", taskConfig=" + taskConfig);
if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) {
// Aha, the activity isn't handling the change, so DIE DIE DIE.
r.configChangeFlags |= changes;
r.startFreezingScreenLocked(r.app, globalChanges);
r.forceNewConfig = false;
preserveWindow &= isResizeOnlyChange(changes);
if (r.app == null || r.app.thread == null) {
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
"Config is destroying non-running " + r);
destroyActivityLocked(r, true, "config");
} else if (r.state == ActivityState.PAUSING) {
// A little annoying: we are waiting for this activity to finish pausing. Let's not
// do anything now, but just flag that it needs to be restarted when done pausing.
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
"Config is skipping already pausing " + r);
r.deferRelaunchUntilPaused = true;
r.preserveWindowOnDeferredRelaunch = preserveWindow;
return true;
} else if (r.state == ActivityState.RESUMED) {
// Try to optimize this case: the configuration is changing and we need to restart
// the top, resumed activity. Instead of doing the normal handshaking, just say
// "restart!".
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
"Config is relaunching resumed " + r);
if (DEBUG_STATES && !r.visible) {
Slog.v(TAG_STATES, "Config is relaunching resumed invisible activity " + r
+ " called by " + Debug.getCallers(4));
}
relaunchActivityLocked(r, r.configChangeFlags, true, preserveWindow);
} else {
if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
"Config is relaunching non-resumed " + r);
relaunchActivityLocked(r, r.configChangeFlags, false, preserveWindow);
}
// All done... tell the caller we weren't able to keep this activity around.
return false;
}
// Default case: the activity can handle this new configuration, so hand it over.
// NOTE: We only forward the task override configuration as the system level configuration
// changes is always sent to all processes when they happen so it can just use whatever
// system level configuration it last got.
r.scheduleConfigurationChanged(taskConfig, true);
r.stopFreezingScreenLocked(false);
return true;
}
private int getTaskConfigurationChanges(ActivityRecord record, Configuration taskConfig,
Configuration oldTaskOverride) {
// If we went from full-screen to non-full-screen, make sure to use the correct
// configuration task diff, so the diff stays as small as possible.
if (Configuration.EMPTY.equals(oldTaskOverride)
&& !Configuration.EMPTY.equals(taskConfig)) {
oldTaskOverride = record.task.extractOverrideConfig(record.configuration);
}
// Conversely, do the same when going the other direction.
if (Configuration.EMPTY.equals(taskConfig)
&& !Configuration.EMPTY.equals(oldTaskOverride)) {
taskConfig = record.task.extractOverrideConfig(record.configuration);
}
// Determine what has changed. May be nothing, if this is a config
// that has come back from the app after going idle. In that case
// we just want to leave the official config object now in the
// activity and do nothing else.
int taskChanges = oldTaskOverride.diff(taskConfig);
// We don't want to use size changes if they don't cross boundaries that are important to
// the app.
if ((taskChanges & CONFIG_SCREEN_SIZE) != 0) {
final boolean crosses = record.crossesHorizontalSizeThreshold(
oldTaskOverride.screenWidthDp, taskConfig.screenWidthDp)
|| record.crossesVerticalSizeThreshold(
oldTaskOverride.screenHeightDp, taskConfig.screenHeightDp);
if (!crosses) {
taskChanges &= ~CONFIG_SCREEN_SIZE;
}
}
if ((taskChanges & CONFIG_SMALLEST_SCREEN_SIZE) != 0) {
final int oldSmallest = oldTaskOverride.smallestScreenWidthDp;
final int newSmallest = taskConfig.smallestScreenWidthDp;
if (!record.crossesSmallestSizeThreshold(oldSmallest, newSmallest)) {
taskChanges &= ~CONFIG_SMALLEST_SCREEN_SIZE;
}
}
return catchConfigChangesFromUnset(taskConfig, oldTaskOverride, taskChanges);
}
private static int catchConfigChangesFromUnset(Configuration taskConfig,
Configuration oldTaskOverride, int taskChanges) {
if (taskChanges == 0) {
// {@link Configuration#diff} doesn't catch changes from unset values.
// Check for changes we care about.
if (oldTaskOverride.orientation != taskConfig.orientation) {
taskChanges |= CONFIG_ORIENTATION;
}
// We want to explicitly track situations where the size configuration goes from
// undefined to defined. We don't care about crossing the threshold in that case,
// because there is no threshold.
final int oldHeight = oldTaskOverride.screenHeightDp;
final int newHeight = taskConfig.screenHeightDp;
final int undefinedHeight = Configuration.SCREEN_HEIGHT_DP_UNDEFINED;
if ((oldHeight == undefinedHeight && newHeight != undefinedHeight)
|| (oldHeight != undefinedHeight && newHeight == undefinedHeight)) {
taskChanges |= CONFIG_SCREEN_SIZE;
}
final int oldWidth = oldTaskOverride.screenWidthDp;
final int newWidth = taskConfig.screenWidthDp;
final int undefinedWidth = Configuration.SCREEN_WIDTH_DP_UNDEFINED;
if ((oldWidth == undefinedWidth && newWidth != undefinedWidth)
|| (oldWidth != undefinedWidth && newWidth == undefinedWidth)) {
taskChanges |= CONFIG_SCREEN_SIZE;
}
final int oldSmallest = oldTaskOverride.smallestScreenWidthDp;
final int newSmallest = taskConfig.smallestScreenWidthDp;
final int undefinedSmallest = Configuration.SMALLEST_SCREEN_WIDTH_DP_UNDEFINED;
if ((oldSmallest == undefinedSmallest && newSmallest != undefinedSmallest)
|| (oldSmallest != undefinedSmallest && newSmallest == undefinedSmallest)) {
taskChanges |= CONFIG_SMALLEST_SCREEN_SIZE;
}
final int oldLayout = oldTaskOverride.screenLayout;
final int newLayout = taskConfig.screenLayout;
if ((oldLayout == SCREENLAYOUT_UNDEFINED && newLayout != SCREENLAYOUT_UNDEFINED)
|| (oldLayout != SCREENLAYOUT_UNDEFINED && newLayout == SCREENLAYOUT_UNDEFINED)) {
taskChanges |= CONFIG_SCREEN_LAYOUT;
}
}
return taskChanges;
}
private static boolean isResizeOnlyChange(int change) {
return (change & ~(CONFIG_SCREEN_SIZE | CONFIG_SMALLEST_SCREEN_SIZE | CONFIG_ORIENTATION
| CONFIG_SCREEN_LAYOUT)) == 0;
}
private void relaunchActivityLocked(
ActivityRecord r, int changes, boolean andResume, boolean preserveWindow) {
if (mService.mSuppressResizeConfigChanges && preserveWindow) {
r.configChangeFlags = 0;
return;
}
List<ResultInfo> results = null;
List<ReferrerIntent> newIntents = null;
if (andResume) {
results = r.results;
newIntents = r.newIntents;
}
if (DEBUG_SWITCH) Slog.v(TAG_SWITCH,
"Relaunching: " + r + " with results=" + results + " newIntents=" + newIntents
+ " andResume=" + andResume + " preserveWindow=" + preserveWindow);
EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY
: EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r),
r.task.taskId, r.shortComponentName);
r.startFreezingScreenLocked(r.app, 0);
mStackSupervisor.removeChildActivityContainers(r);
try {
if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_SWITCH,
"Moving to " + (andResume ? "RESUMED" : "PAUSED") + " Relaunching " + r
+ " callers=" + Debug.getCallers(6));
r.forceNewConfig = false;
mStackSupervisor.activityRelaunchingLocked(r);
r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, changes,
!andResume, new Configuration(mService.mConfiguration),
new Configuration(r.task.mOverrideConfig), preserveWindow);
// Note: don't need to call pauseIfSleepingLocked() here, because
// the caller will only pass in 'andResume' if this activity is
// currently resumed, which implies we aren't sleeping.
} catch (RemoteException e) {
if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_SWITCH, "Relaunch failed", e);
}
if (andResume) {
if (DEBUG_STATES) {
Slog.d(TAG_STATES, "Resumed after relaunch " + r);
}
r.state = ActivityState.RESUMED;
// Relaunch-resume could happen either when the app is already in the front,
// or while it's being brought to front. In the latter case, it's marked RESUMED
// but not yet visible (or stopped). We need to complete the resume here as the
// code in resumeTopActivityInnerLocked to complete the resume might be skipped.
if (!r.visible || r.stopped) {
mWindowManager.setAppVisibility(r.appToken, true);
completeResumeLocked(r);
} else {
r.results = null;
r.newIntents = null;
}
mService.showUnsupportedZoomDialogIfNeededLocked(r);
mService.showAskCompatModeDialogLocked(r);
} else {
mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r);
r.state = ActivityState.PAUSED;
}
r.configChangeFlags = 0;
r.deferRelaunchUntilPaused = false;
r.preserveWindowOnDeferredRelaunch = false;
}
boolean willActivityBeVisibleLocked(IBinder token) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if (r.appToken == token) {
return true;
}
if (r.fullscreen && !r.finishing) {
return false;
}
}
}
final ActivityRecord r = ActivityRecord.forTokenLocked(token);
if (r == null) {
return false;
}
if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false,"
+ " would have returned true for r=" + r);
return !r.finishing;
}
void closeSystemDialogsLocked() {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) {
finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true);
}
}
}
}
boolean finishDisabledPackageActivitiesLocked(String packageName, Set<String> filterByClasses,
boolean doit, boolean evenPersistent, int userId) {
boolean didSomething = false;
TaskRecord lastTask = null;
ComponentName homeActivity = null;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
int numActivities = activities.size();
for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) {
ActivityRecord r = activities.get(activityNdx);
final boolean sameComponent =
(r.packageName.equals(packageName) && (filterByClasses == null
|| filterByClasses.contains(r.realActivity.getClassName())))
|| (packageName == null && r.userId == userId);
if ((userId == UserHandle.USER_ALL || r.userId == userId)
&& (sameComponent || r.task == lastTask)
&& (r.app == null || evenPersistent || !r.app.persistent)) {
if (!doit) {
if (r.finishing) {
// If this activity is just finishing, then it is not
// interesting as far as something to stop.
continue;
}
return true;
}
if (r.isHomeActivity()) {
if (homeActivity != null && homeActivity.equals(r.realActivity)) {
Slog.i(TAG, "Skip force-stop again " + r);
continue;
} else {
homeActivity = r.realActivity;
}
}
didSomething = true;
Slog.i(TAG, " Force finishing activity " + r);
if (sameComponent) {
if (r.app != null) {
r.app.removed = true;
}
r.app = null;
}
lastTask = r.task;
if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop",
true)) {
// r has been deleted from mActivities, accommodate.
--numActivities;
--activityNdx;
}
}
}
}
return didSomething;
}
void getTasksLocked(List<RunningTaskInfo> list, int callingUid, boolean allowed) {
boolean focusedStack = mStackSupervisor.getFocusedStack() == this;
boolean topTask = true;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
if (task.getTopActivity() == null) {
continue;
}
ActivityRecord r = null;
ActivityRecord top = null;
ActivityRecord tmp;
int numActivities = 0;
int numRunning = 0;
final ArrayList<ActivityRecord> activities = task.mActivities;
if (!allowed && !task.isHomeTask() && task.effectiveUid != callingUid) {
continue;
}
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
tmp = activities.get(activityNdx);
if (tmp.finishing) {
continue;
}
r = tmp;
// Initialize state for next task if needed.
if (top == null || (top.state == ActivityState.INITIALIZING)) {
top = r;
numActivities = numRunning = 0;
}
// Add 'r' into the current task.
numActivities++;
if (r.app != null && r.app.thread != null) {
numRunning++;
}
if (DEBUG_ALL) Slog.v(
TAG, r.intent.getComponent().flattenToShortString()
+ ": task=" + r.task);
}
RunningTaskInfo ci = new RunningTaskInfo();
ci.id = task.taskId;
ci.stackId = mStackId;
ci.baseActivity = r.intent.getComponent();
ci.topActivity = top.intent.getComponent();
ci.lastActiveTime = task.lastActiveTime;
if (focusedStack && topTask) {
// Give the latest time to ensure foreground task can be sorted
// at the first, because lastActiveTime of creating task is 0.
ci.lastActiveTime = System.currentTimeMillis();
topTask = false;
}
if (top.task != null) {
ci.description = top.task.lastDescription;
}
ci.numActivities = numActivities;
ci.numRunning = numRunning;
ci.isDockable = task.canGoInDockedStack();
ci.resizeMode = task.mResizeMode;
list.add(ci);
}
}
public void unhandledBackLocked() {
final int top = mTaskHistory.size() - 1;
if (DEBUG_SWITCH) Slog.d(TAG_SWITCH, "Performing unhandledBack(): top activity at " + top);
if (top >= 0) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities;
int activityTop = activities.size() - 1;
if (activityTop > 0) {
finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null,
"unhandled-back", true);
}
}
}
/**
* Reset local parameters because an app's activity died.
* @param app The app of the activity that died.
* @return result from removeHistoryRecordsForAppLocked.
*/
boolean handleAppDiedLocked(ProcessRecord app) {
if (mPausingActivity != null && mPausingActivity.app == app) {
if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG_PAUSE,
"App died while pausing: " + mPausingActivity);
mPausingActivity = null;
}
if (mLastPausedActivity != null && mLastPausedActivity.app == app) {
mLastPausedActivity = null;
mLastNoHistoryActivity = null;
}
return removeHistoryRecordsForAppLocked(app);
}
void handleAppCrashLocked(ProcessRecord app) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord r = activities.get(activityNdx);
if (r.app == app) {
Slog.w(TAG, " Force finishing activity "
+ r.intent.getComponent().flattenToShortString());
// Force the destroy to skip right to removal.
r.app = null;
finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false);
}
}
}
}
boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll,
boolean dumpClient, String dumpPackage, boolean needSep, String header) {
boolean printed = false;
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final TaskRecord task = mTaskHistory.get(taskNdx);
printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw,
mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll,
dumpClient, dumpPackage, needSep, header,
" Task id #" + task.taskId + "\n" +
" mFullscreen=" + task.mFullscreen + "\n" +
" mBounds=" + task.mBounds + "\n" +
" mMinWidth=" + task.mMinWidth + "\n" +
" mMinHeight=" + task.mMinHeight + "\n" +
" mLastNonFullscreenBounds=" + task.mLastNonFullscreenBounds);
if (printed) {
header = null;
}
}
return printed;
}
ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) {
ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>();
if ("all".equals(name)) {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
activities.addAll(mTaskHistory.get(taskNdx).mActivities);
}
} else if ("top".equals(name)) {
final int top = mTaskHistory.size() - 1;
if (top >= 0) {
final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities;
int listTop = list.size() - 1;
if (listTop >= 0) {
activities.add(list.get(listTop));
}
}
} else {
ItemMatcher matcher = new ItemMatcher();
matcher.build(name);
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) {
if (matcher.match(r1, r1.intent.getComponent())) {
activities.add(r1);
}
}
}
}
return activities;
}
ActivityRecord restartPackage(String packageName) {
ActivityRecord starting = topRunningActivityLocked();
// All activities that came from the package must be
// restarted as if there was a config change.
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities;
for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) {
final ActivityRecord a = activities.get(activityNdx);
if (a.info.packageName.equals(packageName)) {
a.forceNewConfig = true;
if (starting != null && a == starting && a.visible) {
a.startFreezingScreenLocked(starting.app,
CONFIG_SCREEN_LAYOUT);
}
}
}
}
return starting;
}
void removeTask(TaskRecord task, String reason) {
removeTask(task, reason, REMOVE_TASK_MODE_DESTROYING);
}
/**
* Removes the input task from this stack.
* @param task to remove.
* @param reason for removal.
* @param mode task removal mode. Either {@link #REMOVE_TASK_MODE_DESTROYING},
* {@link #REMOVE_TASK_MODE_MOVING}, {@link #REMOVE_TASK_MODE_MOVING_TO_TOP}.
*/
void removeTask(TaskRecord task, String reason, int mode) {
if (mode == REMOVE_TASK_MODE_DESTROYING) {
mStackSupervisor.removeLockedTaskLocked(task);
mWindowManager.removeTask(task.taskId);
if (!StackId.persistTaskBounds(mStackId)) {
// Reset current bounds for task whose bounds shouldn't be persisted so it uses
// default configuration the next time it launches.
task.updateOverrideConfiguration(null);
}
}
final ActivityRecord r = mResumedActivity;
if (r != null && r.task == task) {
mResumedActivity = null;
}
final int taskNdx = mTaskHistory.indexOf(task);
final int topTaskNdx = mTaskHistory.size() - 1;
if (task.isOverHomeStack() && taskNdx < topTaskNdx) {
final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1);
if (!nextTask.isOverHomeStack()) {
nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE);
}
}
mTaskHistory.remove(task);
updateTaskMovement(task, true);
if (mode == REMOVE_TASK_MODE_DESTROYING && task.mActivities.isEmpty()) {
// TODO: VI what about activity?
final boolean isVoiceSession = task.voiceSession != null;
if (isVoiceSession) {
try {
task.voiceSession.taskFinished(task.intent, task.taskId);
} catch (RemoteException e) {
}
}
if (task.autoRemoveFromRecents() || isVoiceSession) {
// Task creator asked to remove this when done, or this task was a voice
// interaction, so it should not remain on the recent tasks list.
mRecentTasks.remove(task);
task.removedFromRecents();
}
}
if (mTaskHistory.isEmpty()) {
if (DEBUG_STACK) Slog.i(TAG_STACK, "removeTask: removing stack=" + this);
// We only need to adjust focused stack if this stack is in focus and we are not in the
// process of moving the task to the top of the stack that will be focused.
if (isOnHomeDisplay() && mode != REMOVE_TASK_MODE_MOVING_TO_TOP
&& mStackSupervisor.isFocusedStack(this)) {
String myReason = reason + " leftTaskHistoryEmpty";
if (mFullscreen
|| !adjustFocusToNextFocusableStackLocked(
task.getTaskToReturnTo(), myReason)) {
mStackSupervisor.moveHomeStackToFront(myReason);
}
}
if (mStacks != null) {
mStacks.remove(this);
mStacks.add(0, this);
}
if (!isHomeStack()) {
mActivityContainer.onTaskListEmptyLocked();
}
}
task.stack = null;
}
TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent,
IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor,
boolean toTop) {
TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession,
voiceInteractor);
// add the task to stack first, mTaskPositioner might need the stack association
addTask(task, toTop, "createTaskRecord");
final boolean isLockscreenShown = mService.mLockScreenShown == LOCK_SCREEN_SHOWN;
if (!layoutTaskInStack(task, info.windowLayout) && mBounds != null && task.isResizeable()
&& !isLockscreenShown) {
task.updateOverrideConfiguration(mBounds);
}
return task;
}
boolean layoutTaskInStack(TaskRecord task, ActivityInfo.WindowLayout windowLayout) {
if (mTaskPositioner == null) {
return false;
}
mTaskPositioner.updateDefaultBounds(task, mTaskHistory, windowLayout);
return true;
}
ArrayList<TaskRecord> getAllTasks() {
return new ArrayList<>(mTaskHistory);
}
void addTask(final TaskRecord task, final boolean toTop, String reason) {
final ActivityStack prevStack = preAddTask(task, reason, toTop);
task.stack = this;
if (toTop) {
insertTaskAtTop(task, null);
} else {
mTaskHistory.add(0, task);
updateTaskMovement(task, false);
}
postAddTask(task, prevStack);
}
void positionTask(final TaskRecord task, int position) {
final ActivityRecord topRunningActivity = task.topRunningActivityLocked();
final boolean wasResumed = topRunningActivity == task.stack.mResumedActivity;
final ActivityStack prevStack = preAddTask(task, "positionTask", !ON_TOP);
task.stack = this;
insertTaskAtPosition(task, position);
postAddTask(task, prevStack);
if (wasResumed) {
if (mResumedActivity != null) {
Log.wtf(TAG, "mResumedActivity was already set when moving mResumedActivity from"
+ " other stack to this stack mResumedActivity=" + mResumedActivity
+ " other mResumedActivity=" + topRunningActivity);
}
mResumedActivity = topRunningActivity;
}
}
private ActivityStack preAddTask(TaskRecord task, String reason, boolean toTop) {
final ActivityStack prevStack = task.stack;
if (prevStack != null && prevStack != this) {
prevStack.removeTask(task, reason,
toTop ? REMOVE_TASK_MODE_MOVING_TO_TOP : REMOVE_TASK_MODE_MOVING);
}
return prevStack;
}
private void postAddTask(TaskRecord task, ActivityStack prevStack) {
if (prevStack != null) {
mStackSupervisor.scheduleReportPictureInPictureModeChangedIfNeeded(task, prevStack);
} else if (task.voiceSession != null) {
try {
task.voiceSession.taskStarted(task.intent, task.taskId);
} catch (RemoteException e) {
}
}
}
void addConfigOverride(ActivityRecord r, TaskRecord task) {
final Rect bounds = task.updateOverrideConfigurationFromLaunchBounds();
// TODO: VI deal with activity
mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken,
r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen,
(r.info.flags & FLAG_SHOW_FOR_ALL_USERS) != 0, r.userId, r.info.configChanges,
task.voiceSession != null, r.mLaunchTaskBehind, bounds, task.mOverrideConfig,
task.mResizeMode, r.isAlwaysFocusable(), task.isHomeTask(),
r.appInfo.targetSdkVersion, r.mRotationAnimationHint);
r.taskConfigOverride = task.mOverrideConfig;
}
void moveToFrontAndResumeStateIfNeeded(
ActivityRecord r, boolean moveToFront, boolean setResume, String reason) {
if (!moveToFront) {
return;
}
// If the activity owns the last resumed activity, transfer that together,
// so that we don't resume the same activity again in the new stack.
// Apps may depend on onResume()/onPause() being called in pairs.
if (setResume) {
mResumedActivity = r;
}
// Move the stack in which we are placing the activity to the front. The call will also
// make sure the activity focus is set.
moveToFront(reason);
}
/**
* Moves the input activity from its current stack to this one.
* NOTE: The current task of the activity isn't moved to this stack. Instead a new task is
* created on this stack which the activity is added to.
* */
void moveActivityToStack(ActivityRecord r) {
final ActivityStack prevStack = r.task.stack;
if (prevStack.mStackId == mStackId) {
// You are already in the right stack silly...
return;
}
final boolean wasFocused = mStackSupervisor.isFocusedStack(prevStack)
&& (mStackSupervisor.topRunningActivityLocked() == r);
final boolean wasResumed = wasFocused && (prevStack.mResumedActivity == r);
final TaskRecord task = createTaskRecord(
mStackSupervisor.getNextTaskIdForUserLocked(r.userId),
r.info, r.intent, null, null, true);
r.setTask(task, null);
task.addActivityToTop(r);
setAppTask(r, task);
mStackSupervisor.scheduleReportPictureInPictureModeChangedIfNeeded(task, prevStack);
moveToFrontAndResumeStateIfNeeded(r, wasFocused, wasResumed, "moveActivityToStack");
if (wasResumed) {
prevStack.mResumedActivity = null;
}
}
private void setAppTask(ActivityRecord r, TaskRecord task) {
final Rect bounds = task.updateOverrideConfigurationFromLaunchBounds();
mWindowManager.setAppTask(r.appToken, task.taskId, mStackId, bounds, task.mOverrideConfig,
task.mResizeMode, task.isHomeTask());
r.taskConfigOverride = task.mOverrideConfig;
}
public int getStackId() {
return mStackId;
}
@Override
public String toString() {
return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this))
+ " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}";
}
void onLockTaskPackagesUpdatedLocked() {
for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) {
mTaskHistory.get(taskNdx).setLockTaskAuth();
}
}
}