/**
* Copyright (c) 2014, 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.notification;
import static android.content.Context.BIND_ALLOW_WHITELIST_MANAGEMENT;
import static android.content.Context.BIND_AUTO_CREATE;
import static android.content.Context.BIND_FOREGROUND_SERVICE;
import android.annotation.NonNull;
import android.app.ActivityManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.ServiceConnection;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.ResolveInfo;
import android.content.pm.ServiceInfo;
import android.content.pm.UserInfo;
import android.database.ContentObserver;
import android.net.Uri;
import android.os.Build;
import android.os.Handler;
import android.os.IBinder;
import android.os.IInterface;
import android.os.RemoteException;
import android.os.UserHandle;
import android.os.UserManager;
import android.provider.Settings;
import android.text.TextUtils;
import android.util.ArraySet;
import android.util.Log;
import android.util.Slog;
import android.util.SparseArray;
import com.android.server.notification.NotificationManagerService.DumpFilter;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Objects;
import java.util.Set;
/**
* Manages the lifecycle of application-provided services bound by system server.
*
* Services managed by this helper must have:
* - An associated system settings value with a list of enabled component names.
* - A well-known action for services to use in their intent-filter.
* - A system permission for services to require in order to ensure system has exclusive binding.
* - A settings page for user configuration of enabled services, and associated intent action.
* - A remote interface definition (aidl) provided by the service used for communication.
*/
abstract public class ManagedServices {
protected final String TAG = getClass().getSimpleName();
protected final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
protected static final String ENABLED_SERVICES_SEPARATOR = ":";
protected final Context mContext;
protected final Object mMutex;
private final UserProfiles mUserProfiles;
private final SettingsObserver mSettingsObserver;
private final Config mConfig;
private ArraySet<String> mRestored;
// contains connections to all connected services, including app services
// and system services
protected final ArrayList<ManagedServiceInfo> mServices = new ArrayList<ManagedServiceInfo>();
// things that will be put into mServices as soon as they're ready
private final ArrayList<String> mServicesBinding = new ArrayList<String>();
// lists the component names of all enabled (and therefore potentially connected)
// app services for current profiles.
private ArraySet<ComponentName> mEnabledServicesForCurrentProfiles
= new ArraySet<ComponentName>();
// Just the packages from mEnabledServicesForCurrentProfiles
private ArraySet<String> mEnabledServicesPackageNames = new ArraySet<String>();
// List of packages in restored setting across all mUserProfiles, for quick
// filtering upon package updates.
private ArraySet<String> mRestoredPackages = new ArraySet<>();
// List of enabled packages that have nevertheless asked not to be run
private ArraySet<ComponentName> mSnoozingForCurrentProfiles = new ArraySet<>();
// Kept to de-dupe user change events (experienced after boot, when we receive a settings and a
// user change).
private int[] mLastSeenProfileIds;
private final BroadcastReceiver mRestoreReceiver;
public ManagedServices(Context context, Handler handler, Object mutex,
UserProfiles userProfiles) {
mContext = context;
mMutex = mutex;
mUserProfiles = userProfiles;
mConfig = getConfig();
mSettingsObserver = new SettingsObserver(handler);
mRestoreReceiver = new SettingRestoredReceiver();
IntentFilter filter = new IntentFilter(Intent.ACTION_SETTING_RESTORED);
context.registerReceiver(mRestoreReceiver, filter);
rebuildRestoredPackages();
}
class SettingRestoredReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (Intent.ACTION_SETTING_RESTORED.equals(intent.getAction())) {
String element = intent.getStringExtra(Intent.EXTRA_SETTING_NAME);
if (Objects.equals(element, mConfig.secureSettingName)
|| Objects.equals(element, mConfig.secondarySettingName)) {
String prevValue = intent.getStringExtra(Intent.EXTRA_SETTING_PREVIOUS_VALUE);
String newValue = intent.getStringExtra(Intent.EXTRA_SETTING_NEW_VALUE);
settingRestored(element, prevValue, newValue, getSendingUserId());
}
}
}
}
abstract protected Config getConfig();
private String getCaption() {
return mConfig.caption;
}
abstract protected IInterface asInterface(IBinder binder);
abstract protected boolean checkType(IInterface service);
abstract protected void onServiceAdded(ManagedServiceInfo info);
protected void onServiceRemovedLocked(ManagedServiceInfo removed) { }
private ManagedServiceInfo newServiceInfo(IInterface service,
ComponentName component, int userid, boolean isSystem, ServiceConnection connection,
int targetSdkVersion) {
return new ManagedServiceInfo(service, component, userid, isSystem, connection,
targetSdkVersion);
}
public void onBootPhaseAppsCanStart() {
mSettingsObserver.observe();
}
public void dump(PrintWriter pw, DumpFilter filter) {
pw.println(" All " + getCaption() + "s (" + mEnabledServicesForCurrentProfiles.size()
+ ") enabled for current profiles:");
for (ComponentName cmpt : mEnabledServicesForCurrentProfiles) {
if (filter != null && !filter.matches(cmpt)) continue;
pw.println(" " + cmpt);
}
pw.println(" Live " + getCaption() + "s (" + mServices.size() + "):");
for (ManagedServiceInfo info : mServices) {
if (filter != null && !filter.matches(info.component)) continue;
pw.println(" " + info.component
+ " (user " + info.userid + "): " + info.service
+ (info.isSystem?" SYSTEM":"")
+ (info.isGuest(this)?" GUEST":""));
}
pw.println(" Snoozed " + getCaption() + "s (" +
mSnoozingForCurrentProfiles.size() + "):");
for (ComponentName name : mSnoozingForCurrentProfiles) {
pw.println(" " + name.flattenToShortString());
}
}
// By convention, restored settings are replicated to another settings
// entry, named similarly but with a disambiguation suffix.
public static String restoredSettingName(String setting) {
return setting + ":restored";
}
// The OS has done a restore of this service's saved state. We clone it to the
// 'restored' reserve, and then once we return and the actual write to settings is
// performed, our observer will do the work of maintaining the restored vs live
// settings data.
public void settingRestored(String element, String oldValue, String newValue, int userid) {
if (DEBUG) Slog.d(TAG, "Restored managed service setting: " + element
+ " ovalue=" + oldValue + " nvalue=" + newValue);
if (mConfig.secureSettingName.equals(element) ||
mConfig.secondarySettingName.equals(element)) {
if (element != null) {
Settings.Secure.putStringForUser(mContext.getContentResolver(),
restoredSettingName(element),
newValue,
userid);
updateSettingsAccordingToInstalledServices(element, userid);
rebuildRestoredPackages();
}
}
}
public boolean isComponentEnabledForPackage(String pkg) {
return mEnabledServicesPackageNames.contains(pkg);
}
public void onPackagesChanged(boolean queryReplace, String[] pkgList) {
if (DEBUG) Slog.d(TAG, "onPackagesChanged queryReplace=" + queryReplace
+ " pkgList=" + (pkgList == null ? null : Arrays.asList(pkgList))
+ " mEnabledServicesPackageNames=" + mEnabledServicesPackageNames);
boolean anyServicesInvolved = false;
if (pkgList != null && (pkgList.length > 0)) {
for (String pkgName : pkgList) {
if (mEnabledServicesPackageNames.contains(pkgName) ||
mRestoredPackages.contains(pkgName)) {
anyServicesInvolved = true;
}
}
}
if (anyServicesInvolved) {
// if we're not replacing a package, clean up orphaned bits
if (!queryReplace) {
updateSettingsAccordingToInstalledServices();
rebuildRestoredPackages();
}
// make sure we're still bound to any of our services who may have just upgraded
rebindServices(false);
}
}
public void onUserSwitched(int user) {
if (DEBUG) Slog.d(TAG, "onUserSwitched u=" + user);
rebuildRestoredPackages();
if (Arrays.equals(mLastSeenProfileIds, mUserProfiles.getCurrentProfileIds())) {
if (DEBUG) Slog.d(TAG, "Current profile IDs didn't change, skipping rebindServices().");
return;
}
rebindServices(true);
}
public void onUserUnlocked(int user) {
if (DEBUG) Slog.d(TAG, "onUserUnlocked u=" + user);
rebuildRestoredPackages();
rebindServices(false);
}
public ManagedServiceInfo getServiceFromTokenLocked(IInterface service) {
if (service == null) {
return null;
}
final IBinder token = service.asBinder();
final int N = mServices.size();
for (int i = 0; i < N; i++) {
final ManagedServiceInfo info = mServices.get(i);
if (info.service.asBinder() == token) return info;
}
return null;
}
public ManagedServiceInfo checkServiceTokenLocked(IInterface service) {
checkNotNull(service);
ManagedServiceInfo info = getServiceFromTokenLocked(service);
if (info != null) {
return info;
}
throw new SecurityException("Disallowed call from unknown " + getCaption() + ": "
+ service);
}
public void unregisterService(IInterface service, int userid) {
checkNotNull(service);
// no need to check permissions; if your service binder is in the list,
// that's proof that you had permission to add it in the first place
unregisterServiceImpl(service, userid);
}
public void registerService(IInterface service, ComponentName component, int userid) {
checkNotNull(service);
ManagedServiceInfo info = registerServiceImpl(service, component, userid);
if (info != null) {
onServiceAdded(info);
}
}
/**
* Add a service to our callbacks. The lifecycle of this service is managed externally,
* but unlike a system service, it should not be considered privledged.
* */
public void registerGuestService(ManagedServiceInfo guest) {
checkNotNull(guest.service);
if (!checkType(guest.service)) {
throw new IllegalArgumentException();
}
if (registerServiceImpl(guest) != null) {
onServiceAdded(guest);
}
}
public void setComponentState(ComponentName component, boolean enabled) {
boolean previous = !mSnoozingForCurrentProfiles.contains(component);
if (previous == enabled) {
return;
}
if (enabled) {
mSnoozingForCurrentProfiles.remove(component);
} else {
mSnoozingForCurrentProfiles.add(component);
}
// State changed
if (DEBUG) {
Slog.d(TAG, ((enabled) ? "Enabling " : "Disabling ") + "component " +
component.flattenToShortString());
}
synchronized (mMutex) {
final int[] userIds = mUserProfiles.getCurrentProfileIds();
for (int userId : userIds) {
if (enabled) {
registerServiceLocked(component, userId);
} else {
unregisterServiceLocked(component, userId);
}
}
}
}
private void rebuildRestoredPackages() {
mRestoredPackages.clear();
mSnoozingForCurrentProfiles.clear();
String secureSettingName = restoredSettingName(mConfig.secureSettingName);
String secondarySettingName = mConfig.secondarySettingName == null
? null : restoredSettingName(mConfig.secondarySettingName);
int[] userIds = mUserProfiles.getCurrentProfileIds();
final int N = userIds.length;
for (int i = 0; i < N; ++i) {
ArraySet<ComponentName> names =
loadComponentNamesFromSetting(secureSettingName, userIds[i]);
if (secondarySettingName != null) {
names.addAll(loadComponentNamesFromSetting(secondarySettingName, userIds[i]));
}
for (ComponentName name : names) {
mRestoredPackages.add(name.getPackageName());
}
}
}
protected @NonNull ArraySet<ComponentName> loadComponentNamesFromSetting(String settingName,
int userId) {
final ContentResolver cr = mContext.getContentResolver();
String settingValue = Settings.Secure.getStringForUser(
cr,
settingName,
userId);
if (TextUtils.isEmpty(settingValue))
return new ArraySet<>();
String[] restored = settingValue.split(ENABLED_SERVICES_SEPARATOR);
ArraySet<ComponentName> result = new ArraySet<>(restored.length);
for (int i = 0; i < restored.length; i++) {
ComponentName value = ComponentName.unflattenFromString(restored[i]);
if (null != value) {
result.add(value);
}
}
return result;
}
private void storeComponentsToSetting(Set<ComponentName> components,
String settingName,
int userId) {
String[] componentNames = null;
if (null != components) {
componentNames = new String[components.size()];
int index = 0;
for (ComponentName c: components) {
componentNames[index++] = c.flattenToString();
}
}
final String value = (componentNames == null) ? "" :
TextUtils.join(ENABLED_SERVICES_SEPARATOR, componentNames);
final ContentResolver cr = mContext.getContentResolver();
Settings.Secure.putStringForUser(
cr,
settingName,
value,
userId);
}
/**
* Remove access for any services that no longer exist.
*/
private void updateSettingsAccordingToInstalledServices() {
int[] userIds = mUserProfiles.getCurrentProfileIds();
final int N = userIds.length;
for (int i = 0; i < N; ++i) {
updateSettingsAccordingToInstalledServices(mConfig.secureSettingName, userIds[i]);
if (mConfig.secondarySettingName != null) {
updateSettingsAccordingToInstalledServices(
mConfig.secondarySettingName, userIds[i]);
}
}
rebuildRestoredPackages();
}
protected Set<ComponentName> queryPackageForServices(String packageName, int userId) {
Set<ComponentName> installed = new ArraySet<>();
final PackageManager pm = mContext.getPackageManager();
Intent queryIntent = new Intent(mConfig.serviceInterface);
if (!TextUtils.isEmpty(packageName)) {
queryIntent.setPackage(packageName);
}
List<ResolveInfo> installedServices = pm.queryIntentServicesAsUser(
queryIntent,
PackageManager.GET_SERVICES | PackageManager.GET_META_DATA,
userId);
if (DEBUG)
Slog.v(TAG, mConfig.serviceInterface + " services: " + installedServices);
if (installedServices != null) {
for (int i = 0, count = installedServices.size(); i < count; i++) {
ResolveInfo resolveInfo = installedServices.get(i);
ServiceInfo info = resolveInfo.serviceInfo;
ComponentName component = new ComponentName(info.packageName, info.name);
if (!mConfig.bindPermission.equals(info.permission)) {
Slog.w(TAG, "Skipping " + getCaption() + " service "
+ info.packageName + "/" + info.name
+ ": it does not require the permission "
+ mConfig.bindPermission);
continue;
}
installed.add(component);
}
}
return installed;
}
private void updateSettingsAccordingToInstalledServices(String setting, int userId) {
boolean restoredChanged = false;
boolean currentChanged = false;
Set<ComponentName> restored =
loadComponentNamesFromSetting(restoredSettingName(setting), userId);
Set<ComponentName> current =
loadComponentNamesFromSetting(setting, userId);
// Load all services for all packages.
Set<ComponentName> installed = queryPackageForServices(null, userId);
ArraySet<ComponentName> retained = new ArraySet<>();
for (ComponentName component : installed) {
if (null != restored) {
boolean wasRestored = restored.remove(component);
if (wasRestored) {
// Freshly installed package has service that was mentioned in restored setting.
if (DEBUG)
Slog.v(TAG, "Restoring " + component + " for user " + userId);
restoredChanged = true;
currentChanged = true;
retained.add(component);
continue;
}
}
if (null != current) {
if (current.contains(component))
retained.add(component);
}
}
currentChanged |= ((current == null ? 0 : current.size()) != retained.size());
if (currentChanged) {
if (DEBUG) Slog.v(TAG, "List of " + getCaption() + " services was updated " + current);
storeComponentsToSetting(retained, setting, userId);
}
if (restoredChanged) {
if (DEBUG) Slog.v(TAG,
"List of " + getCaption() + " restored services was updated " + restored);
storeComponentsToSetting(restored, restoredSettingName(setting), userId);
}
}
/**
* Called whenever packages change, the user switches, or the secure setting
* is altered. (For example in response to USER_SWITCHED in our broadcast receiver)
*/
private void rebindServices(boolean forceRebind) {
if (DEBUG) Slog.d(TAG, "rebindServices");
final int[] userIds = mUserProfiles.getCurrentProfileIds();
final int nUserIds = userIds.length;
final SparseArray<ArraySet<ComponentName>> componentsByUser = new SparseArray<>();
for (int i = 0; i < nUserIds; ++i) {
componentsByUser.put(userIds[i],
loadComponentNamesFromSetting(mConfig.secureSettingName, userIds[i]));
if (mConfig.secondarySettingName != null) {
componentsByUser.get(userIds[i]).addAll(
loadComponentNamesFromSetting(mConfig.secondarySettingName, userIds[i]));
}
}
final ArrayList<ManagedServiceInfo> removableBoundServices = new ArrayList<>();
final SparseArray<Set<ComponentName>> toAdd = new SparseArray<>();
synchronized (mMutex) {
// Rebind to non-system services if user switched
for (ManagedServiceInfo service : mServices) {
if (!service.isSystem && !service.isGuest(this)) {
removableBoundServices.add(service);
}
}
mEnabledServicesForCurrentProfiles.clear();
mEnabledServicesPackageNames.clear();
for (int i = 0; i < nUserIds; ++i) {
// decode the list of components
final ArraySet<ComponentName> userComponents = componentsByUser.get(userIds[i]);
if (null == userComponents) {
toAdd.put(userIds[i], new ArraySet<ComponentName>());
continue;
}
final Set<ComponentName> add = new HashSet<>(userComponents);
add.removeAll(mSnoozingForCurrentProfiles);
toAdd.put(userIds[i], add);
mEnabledServicesForCurrentProfiles.addAll(userComponents);
for (int j = 0; j < userComponents.size(); j++) {
final ComponentName component = userComponents.valueAt(j);
mEnabledServicesPackageNames.add(component.getPackageName());
}
}
}
for (ManagedServiceInfo info : removableBoundServices) {
final ComponentName component = info.component;
final int oldUser = info.userid;
final Set<ComponentName> allowedComponents = toAdd.get(info.userid);
if (allowedComponents != null) {
if (allowedComponents.contains(component) && !forceRebind) {
// Already bound, don't need to bind again.
allowedComponents.remove(component);
} else {
// No longer allowed to be bound, or must rebind.
Slog.v(TAG, "disabling " + getCaption() + " for user "
+ oldUser + ": " + component);
unregisterService(component, oldUser);
}
}
}
for (int i = 0; i < nUserIds; ++i) {
final Set<ComponentName> add = toAdd.get(userIds[i]);
for (ComponentName component : add) {
Slog.v(TAG, "enabling " + getCaption() + " for " + userIds[i] + ": " + component);
registerService(component, userIds[i]);
}
}
mLastSeenProfileIds = userIds;
}
/**
* Version of registerService that takes the name of a service component to bind to.
*/
private void registerService(final ComponentName name, final int userid) {
synchronized (mMutex) {
registerServiceLocked(name, userid);
}
}
/**
* Inject a system service into the management list.
*/
public void registerSystemService(final ComponentName name, final int userid) {
synchronized (mMutex) {
registerServiceLocked(name, userid, true /* isSystem */);
}
}
private void registerServiceLocked(final ComponentName name, final int userid) {
registerServiceLocked(name, userid, false /* isSystem */);
}
private void registerServiceLocked(final ComponentName name, final int userid,
final boolean isSystem) {
if (DEBUG) Slog.v(TAG, "registerService: " + name + " u=" + userid);
final String servicesBindingTag = name.toString() + "/" + userid;
if (mServicesBinding.contains(servicesBindingTag)) {
// stop registering this thing already! we're working on it
return;
}
mServicesBinding.add(servicesBindingTag);
final int N = mServices.size();
for (int i = N - 1; i >= 0; i--) {
final ManagedServiceInfo info = mServices.get(i);
if (name.equals(info.component)
&& info.userid == userid) {
// cut old connections
if (DEBUG) Slog.v(TAG, " disconnecting old " + getCaption() + ": "
+ info.service);
removeServiceLocked(i);
if (info.connection != null) {
mContext.unbindService(info.connection);
}
}
}
Intent intent = new Intent(mConfig.serviceInterface);
intent.setComponent(name);
intent.putExtra(Intent.EXTRA_CLIENT_LABEL, mConfig.clientLabel);
final PendingIntent pendingIntent = PendingIntent.getActivity(
mContext, 0, new Intent(mConfig.settingsAction), 0);
intent.putExtra(Intent.EXTRA_CLIENT_INTENT, pendingIntent);
ApplicationInfo appInfo = null;
try {
appInfo = mContext.getPackageManager().getApplicationInfo(
name.getPackageName(), 0);
} catch (NameNotFoundException e) {
// Ignore if the package doesn't exist we won't be able to bind to the service.
}
final int targetSdkVersion =
appInfo != null ? appInfo.targetSdkVersion : Build.VERSION_CODES.BASE;
try {
if (DEBUG) Slog.v(TAG, "binding: " + intent);
ServiceConnection serviceConnection = new ServiceConnection() {
IInterface mService;
@Override
public void onServiceConnected(ComponentName name, IBinder binder) {
boolean added = false;
ManagedServiceInfo info = null;
synchronized (mMutex) {
mServicesBinding.remove(servicesBindingTag);
try {
mService = asInterface(binder);
info = newServiceInfo(mService, name,
userid, isSystem, this, targetSdkVersion);
binder.linkToDeath(info, 0);
added = mServices.add(info);
} catch (RemoteException e) {
// already dead
}
}
if (added) {
onServiceAdded(info);
}
}
@Override
public void onServiceDisconnected(ComponentName name) {
Slog.v(TAG, getCaption() + " connection lost: " + name);
}
};
if (!mContext.bindServiceAsUser(intent,
serviceConnection,
BIND_AUTO_CREATE | BIND_FOREGROUND_SERVICE | BIND_ALLOW_WHITELIST_MANAGEMENT,
new UserHandle(userid))) {
mServicesBinding.remove(servicesBindingTag);
Slog.w(TAG, "Unable to bind " + getCaption() + " service: " + intent);
return;
}
} catch (SecurityException ex) {
Slog.e(TAG, "Unable to bind " + getCaption() + " service: " + intent, ex);
return;
}
}
/**
* Remove a service for the given user by ComponentName
*/
private void unregisterService(ComponentName name, int userid) {
synchronized (mMutex) {
unregisterServiceLocked(name, userid);
}
}
private void unregisterServiceLocked(ComponentName name, int userid) {
final int N = mServices.size();
for (int i = N - 1; i >= 0; i--) {
final ManagedServiceInfo info = mServices.get(i);
if (name.equals(info.component)
&& info.userid == userid) {
removeServiceLocked(i);
if (info.connection != null) {
try {
mContext.unbindService(info.connection);
} catch (IllegalArgumentException ex) {
// something happened to the service: we think we have a connection
// but it's bogus.
Slog.e(TAG, getCaption() + " " + name + " could not be unbound: " + ex);
}
}
}
}
}
/**
* Removes a service from the list but does not unbind
*
* @return the removed service.
*/
private ManagedServiceInfo removeServiceImpl(IInterface service, final int userid) {
if (DEBUG) Slog.d(TAG, "removeServiceImpl service=" + service + " u=" + userid);
ManagedServiceInfo serviceInfo = null;
synchronized (mMutex) {
final int N = mServices.size();
for (int i = N - 1; i >= 0; i--) {
final ManagedServiceInfo info = mServices.get(i);
if (info.service.asBinder() == service.asBinder()
&& info.userid == userid) {
if (DEBUG) Slog.d(TAG, "Removing active service " + info.component);
serviceInfo = removeServiceLocked(i);
}
}
}
return serviceInfo;
}
private ManagedServiceInfo removeServiceLocked(int i) {
final ManagedServiceInfo info = mServices.remove(i);
onServiceRemovedLocked(info);
return info;
}
private void checkNotNull(IInterface service) {
if (service == null) {
throw new IllegalArgumentException(getCaption() + " must not be null");
}
}
private ManagedServiceInfo registerServiceImpl(final IInterface service,
final ComponentName component, final int userid) {
ManagedServiceInfo info = newServiceInfo(service, component, userid,
true /*isSystem*/, null /*connection*/, Build.VERSION_CODES.LOLLIPOP);
return registerServiceImpl(info);
}
private ManagedServiceInfo registerServiceImpl(ManagedServiceInfo info) {
synchronized (mMutex) {
try {
info.service.asBinder().linkToDeath(info, 0);
mServices.add(info);
return info;
} catch (RemoteException e) {
// already dead
}
}
return null;
}
/**
* Removes a service from the list and unbinds.
*/
private void unregisterServiceImpl(IInterface service, int userid) {
ManagedServiceInfo info = removeServiceImpl(service, userid);
if (info != null && info.connection != null && !info.isGuest(this)) {
mContext.unbindService(info.connection);
}
}
private class SettingsObserver extends ContentObserver {
private final Uri mSecureSettingsUri = Settings.Secure.getUriFor(mConfig.secureSettingName);
private final Uri mSecondarySettingsUri;
private SettingsObserver(Handler handler) {
super(handler);
if (mConfig.secondarySettingName != null) {
mSecondarySettingsUri = Settings.Secure.getUriFor(mConfig.secondarySettingName);
} else {
mSecondarySettingsUri = null;
}
}
private void observe() {
ContentResolver resolver = mContext.getContentResolver();
resolver.registerContentObserver(mSecureSettingsUri,
false, this, UserHandle.USER_ALL);
if (mSecondarySettingsUri != null) {
resolver.registerContentObserver(mSecondarySettingsUri,
false, this, UserHandle.USER_ALL);
}
update(null);
}
@Override
public void onChange(boolean selfChange, Uri uri) {
update(uri);
}
private void update(Uri uri) {
if (uri == null || mSecureSettingsUri.equals(uri)
|| uri.equals(mSecondarySettingsUri)) {
if (DEBUG) Slog.d(TAG, "Setting changed: uri=" + uri);
rebindServices(false);
rebuildRestoredPackages();
}
}
}
public class ManagedServiceInfo implements IBinder.DeathRecipient {
public IInterface service;
public ComponentName component;
public int userid;
public boolean isSystem;
public ServiceConnection connection;
public int targetSdkVersion;
public ManagedServiceInfo(IInterface service, ComponentName component,
int userid, boolean isSystem, ServiceConnection connection, int targetSdkVersion) {
this.service = service;
this.component = component;
this.userid = userid;
this.isSystem = isSystem;
this.connection = connection;
this.targetSdkVersion = targetSdkVersion;
}
public boolean isGuest(ManagedServices host) {
return ManagedServices.this != host;
}
public ManagedServices getOwner() {
return ManagedServices.this;
}
@Override
public String toString() {
return new StringBuilder("ManagedServiceInfo[")
.append("component=").append(component)
.append(",userid=").append(userid)
.append(",isSystem=").append(isSystem)
.append(",targetSdkVersion=").append(targetSdkVersion)
.append(",connection=").append(connection == null ? null : "<connection>")
.append(",service=").append(service)
.append(']').toString();
}
public boolean enabledAndUserMatches(int nid) {
if (!isEnabledForCurrentProfiles()) {
return false;
}
if (this.userid == UserHandle.USER_ALL) return true;
if (this.isSystem) return true;
if (nid == UserHandle.USER_ALL || nid == this.userid) return true;
return supportsProfiles() && mUserProfiles.isCurrentProfile(nid);
}
public boolean supportsProfiles() {
return targetSdkVersion >= Build.VERSION_CODES.LOLLIPOP;
}
@Override
public void binderDied() {
if (DEBUG) Slog.d(TAG, "binderDied");
// Remove the service, but don't unbind from the service. The system will bring the
// service back up, and the onServiceConnected handler will readd the service with the
// new binding. If this isn't a bound service, and is just a registered
// service, just removing it from the list is all we need to do anyway.
removeServiceImpl(this.service, this.userid);
}
/** convenience method for looking in mEnabledServicesForCurrentProfiles */
public boolean isEnabledForCurrentProfiles() {
if (this.isSystem) return true;
if (this.connection == null) return false;
return mEnabledServicesForCurrentProfiles.contains(this.component);
}
}
/** convenience method for looking in mEnabledServicesForCurrentProfiles */
public boolean isComponentEnabledForCurrentProfiles(ComponentName component) {
return mEnabledServicesForCurrentProfiles.contains(component);
}
public static class UserProfiles {
// Profiles of the current user.
private final SparseArray<UserInfo> mCurrentProfiles = new SparseArray<>();
public void updateCache(@NonNull Context context) {
UserManager userManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
if (userManager != null) {
int currentUserId = ActivityManager.getCurrentUser();
List<UserInfo> profiles = userManager.getProfiles(currentUserId);
synchronized (mCurrentProfiles) {
mCurrentProfiles.clear();
for (UserInfo user : profiles) {
mCurrentProfiles.put(user.id, user);
}
}
}
}
public int[] getCurrentProfileIds() {
synchronized (mCurrentProfiles) {
int[] users = new int[mCurrentProfiles.size()];
final int N = mCurrentProfiles.size();
for (int i = 0; i < N; ++i) {
users[i] = mCurrentProfiles.keyAt(i);
}
return users;
}
}
public boolean isCurrentProfile(int userId) {
synchronized (mCurrentProfiles) {
return mCurrentProfiles.get(userId) != null;
}
}
}
public static class Config {
public String caption;
public String serviceInterface;
public String secureSettingName;
public String secondarySettingName;
public String bindPermission;
public String settingsAction;
public int clientLabel;
}
}