1 /*
2  * Copyright (C) 2012 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.gallery3d.util;
18 
19 import android.content.Context;
20 import android.support.v4.view.accessibility.AccessibilityRecordCompat;
21 import android.view.View;
22 import android.view.accessibility.AccessibilityEvent;
23 import android.view.accessibility.AccessibilityManager;
24 
25 import com.android.gallery3d.common.ApiHelper;
26 
27 /**
28  * AccessibilityUtils provides functions needed in accessibility mode. All the functions
29  * in this class are made compatible with gingerbread and later API's
30 */
31 public class AccessibilityUtils {
makeAnnouncement(View view, CharSequence announcement)32     public static void makeAnnouncement(View view, CharSequence announcement) {
33         if (view == null)
34             return;
35         if (ApiHelper.HAS_ANNOUNCE_FOR_ACCESSIBILITY) {
36             view.announceForAccessibility(announcement);
37         } else {
38             // For API 15 and earlier, we need to construct an accessibility event
39             Context ctx = view.getContext();
40             AccessibilityManager am = (AccessibilityManager) ctx.getSystemService(
41                     Context.ACCESSIBILITY_SERVICE);
42             if (!am.isEnabled()) return;
43             AccessibilityEvent event = AccessibilityEvent.obtain(
44                     AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED);
45             AccessibilityRecordCompat arc = new AccessibilityRecordCompat(event);
46             arc.setSource(view);
47             event.setClassName(view.getClass().getName());
48             event.setPackageName(view.getContext().getPackageName());
49             event.setEnabled(view.isEnabled());
50             event.getText().add(announcement);
51             am.sendAccessibilityEvent(event);
52         }
53     }
54 }