/*
* Copyright (C) 2016 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.example.android.commitcontent.app;
import android.support.v13.view.inputmethod.EditorInfoCompat;
import android.support.v13.view.inputmethod.InputConnectionCompat;
import android.support.v13.view.inputmethod.InputContentInfoCompat;
import android.app.Activity;
import android.graphics.Color;
import android.net.Uri;
import android.os.Bundle;
import android.os.Parcelable;
import android.text.TextUtils;
import android.util.Log;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputConnection;
import android.webkit.WebView;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.Arrays;
public class MainActivity extends Activity {
private static final String INPUT_CONTENT_INFO_KEY = "COMMIT_CONTENT_INPUT_CONTENT_INFO";
private static final String COMMIT_CONTENT_FLAGS_KEY = "COMMIT_CONTENT_FLAGS";
private static String TAG = "CommitContentSupport";
private WebView mWebView;
private TextView mLabel;
private TextView mContentUri;
private TextView mLinkUri;
private TextView mMimeTypes;
private TextView mFlags;
private InputContentInfoCompat mCurrentInputContentInfo;
private int mCurrentFlags;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.commit_content);
final LinearLayout layout =
(LinearLayout) findViewById(R.id.commit_content_sample_edit_boxes);
// This declares that the IME cannot commit any content with
// InputConnectionCompat#commitContent().
layout.addView(createEditTextWithContentMimeTypes(null));
// This declares that the IME can commit contents with
// InputConnectionCompat#commitContent() if they match "image/gif".
layout.addView(createEditTextWithContentMimeTypes(new String[]{"image/gif"}));
// This declares that the IME can commit contents with
// InputConnectionCompat#commitContent() if they match "image/png".
layout.addView(createEditTextWithContentMimeTypes(new String[]{"image/png"}));
// This declares that the IME can commit contents with
// InputConnectionCompat#commitContent() if they match "image/jpeg".
layout.addView(createEditTextWithContentMimeTypes(new String[]{"image/jpeg"}));
// This declares that the IME can commit contents with
// InputConnectionCompat#commitContent() if they match "image/webp".
layout.addView(createEditTextWithContentMimeTypes(new String[]{"image/webp"}));
// This declares that the IME can commit contents with
// InputConnectionCompat#commitContent() if they match "image/png", "image/gif",
// "image/jpeg", or "image/webp".
layout.addView(createEditTextWithContentMimeTypes(
new String[]{"image/png", "image/gif", "image/jpeg", "image/webp"}));
mWebView = (WebView) findViewById(R.id.commit_content_webview);
mMimeTypes = (TextView) findViewById(R.id.text_commit_content_mime_types);
mLabel = (TextView) findViewById(R.id.text_commit_content_label);
mContentUri = (TextView) findViewById(R.id.text_commit_content_content_uri);
mLinkUri = (TextView) findViewById(R.id.text_commit_content_link_uri);
mFlags = (TextView) findViewById(R.id.text_commit_content_link_flags);
if (savedInstanceState != null) {
final InputContentInfoCompat previousInputContentInfo = InputContentInfoCompat.wrap(
savedInstanceState.getParcelable(INPUT_CONTENT_INFO_KEY));
final int previousFlags = savedInstanceState.getInt(COMMIT_CONTENT_FLAGS_KEY);
if (previousInputContentInfo != null) {
onCommitContentInternal(previousInputContentInfo, previousFlags);
}
}
}
private boolean onCommitContent(InputContentInfoCompat inputContentInfo, int flags,
Bundle opts, String[] contentMimeTypes) {
// Clear the temporary permission (if any). See below about why we do this here.
try {
if (mCurrentInputContentInfo != null) {
mCurrentInputContentInfo.releasePermission();
}
} catch (Exception e) {
Log.e(TAG, "InputContentInfoCompat#releasePermission() failed.", e);
} finally {
mCurrentInputContentInfo = null;
}
mWebView.loadUrl("about:blank");
mMimeTypes.setText("");
mContentUri.setText("");
mLabel.setText("");
mLinkUri.setText("");
mFlags.setText("");
boolean supported = false;
for (final String mimeType : contentMimeTypes) {
if (inputContentInfo.getDescription().hasMimeType(mimeType)) {
supported = true;
break;
}
}
if (!supported) {
return false;
}
return onCommitContentInternal(inputContentInfo, flags);
}
private boolean onCommitContentInternal(InputContentInfoCompat inputContentInfo, int flags) {
if ((flags & InputConnectionCompat.INPUT_CONTENT_GRANT_READ_URI_PERMISSION) != 0) {
try {
inputContentInfo.requestPermission();
} catch (Exception e) {
Log.e(TAG, "InputContentInfoCompat#requestPermission() failed.", e);
return false;
}
}
mMimeTypes.setText(
Arrays.toString(inputContentInfo.getDescription().filterMimeTypes("*/*")));
mContentUri.setText(inputContentInfo.getContentUri().toString());
mLabel.setText(inputContentInfo.getDescription().getLabel());
Uri linkUri = inputContentInfo.getLinkUri();
mLinkUri.setText(linkUri != null ? linkUri.toString() : "null");
mFlags.setText(flagsToString(flags));
mWebView.loadUrl(inputContentInfo.getContentUri().toString());
mWebView.setBackgroundColor(Color.TRANSPARENT);
// Due to the asynchronous nature of WebView, it is a bit too early to call
// inputContentInfo.releasePermission() here. Hence we call IC#releasePermission() when this
// method is called next time. Note that calling IC#releasePermission() is just to be a
// good citizen. Even if we failed to call that method, the system would eventually revoke
// the permission sometime after inputContentInfo object gets garbage-collected.
mCurrentInputContentInfo = inputContentInfo;
mCurrentFlags = flags;
return true;
}
@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
if (mCurrentInputContentInfo != null) {
savedInstanceState.putParcelable(INPUT_CONTENT_INFO_KEY,
(Parcelable) mCurrentInputContentInfo.unwrap());
savedInstanceState.putInt(COMMIT_CONTENT_FLAGS_KEY, mCurrentFlags);
}
mCurrentInputContentInfo = null;
mCurrentFlags = 0;
super.onSaveInstanceState(savedInstanceState);
}
/**
* Creates a new instance of {@link EditText} that is configured to specify the given content
* MIME types to EditorInfo#contentMimeTypes so that developers can locally test how the current
* input method behaves for such content MIME types.
*
* @param contentMimeTypes A {@link String} array that indicates the supported content MIME
* types
* @return a new instance of {@link EditText}, which specifies EditorInfo#contentMimeTypes with
* the given content MIME types
*/
private EditText createEditTextWithContentMimeTypes(String[] contentMimeTypes) {
final CharSequence hintText;
final String[] mimeTypes; // our own copy of contentMimeTypes.
if (contentMimeTypes == null || contentMimeTypes.length == 0) {
hintText = "MIME: []";
mimeTypes = new String[0];
} else {
hintText = "MIME: " + Arrays.toString(contentMimeTypes);
mimeTypes = Arrays.copyOf(contentMimeTypes, contentMimeTypes.length);
}
EditText exitText = new EditText(this) {
@Override
public InputConnection onCreateInputConnection(EditorInfo editorInfo) {
final InputConnection ic = super.onCreateInputConnection(editorInfo);
EditorInfoCompat.setContentMimeTypes(editorInfo, mimeTypes);
final InputConnectionCompat.OnCommitContentListener callback =
new InputConnectionCompat.OnCommitContentListener() {
@Override
public boolean onCommitContent(InputContentInfoCompat inputContentInfo,
int flags, Bundle opts) {
return MainActivity.this.onCommitContent(
inputContentInfo, flags, opts, mimeTypes);
}
};
return InputConnectionCompat.createWrapper(ic, editorInfo, callback);
}
};
exitText.setHint(hintText);
exitText.setTextColor(Color.WHITE);
exitText.setHintTextColor(Color.WHITE);
return exitText;
}
/**
* Converts {@code flags} specified in {@link InputConnectionCompat#commitContent(
* InputConnection, EditorInfo, InputContentInfoCompat, int, Bundle)} to a human readable
* string.
*
* @param flags the 2nd parameter of
* {@link InputConnectionCompat#commitContent(InputConnection, EditorInfo,
* InputContentInfoCompat, int, Bundle)}
* @return a human readable string that corresponds to the given {@code flags}
*/
private static String flagsToString(int flags) {
final ArrayList<String> tokens = new ArrayList<>();
if ((flags & InputConnectionCompat.INPUT_CONTENT_GRANT_READ_URI_PERMISSION) != 0) {
tokens.add("INPUT_CONTENT_GRANT_READ_URI_PERMISSION");
flags &= ~InputConnectionCompat.INPUT_CONTENT_GRANT_READ_URI_PERMISSION;
}
if (flags != 0) {
tokens.add("0x" + Integer.toHexString(flags));
}
return TextUtils.join(" | ", tokens);
}
}