1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/*
* Copyright (C) 2020 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.systemui.media.systemsounds;
import android.Manifest;
import android.app.ActivityManager;
import android.app.WindowConfiguration;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.media.AudioManager;
import android.util.Slog;
import com.android.systemui.CoreStartable;
import com.android.systemui.R;
import com.android.systemui.dagger.SysUISingleton;
import com.android.systemui.shared.system.ActivityManagerWrapper;
import com.android.systemui.shared.system.TaskStackChangeListener;
import com.android.systemui.shared.system.TaskStackChangeListeners;
import javax.inject.Inject;
/**
* If a sound effect is defined for {@link android.media.AudioManager#FX_HOME}, a
* {@link TaskStackChangeListener} is registered to play a home sound effect when conditions
* documented at {@link #handleTaskStackChanged} apply.
*/
@SysUISingleton
public class HomeSoundEffectController implements CoreStartable {
private static final String TAG = "HomeSoundEffectController";
private final AudioManager mAudioManager;
private final TaskStackChangeListeners mTaskStackChangeListeners;
private final ActivityManagerWrapper mActivityManagerWrapper;
private final PackageManager mPm;
private final boolean mPlayHomeSoundAfterAssistant;
private final boolean mPlayHomeSoundAfterDream;
// Initialize true because home sound should not be played when the system boots.
private boolean mIsLastTaskHome = true;
// mLastHomePackageName could go out of sync in rare circumstances if launcher changes,
// but it's cheaper than the alternative and potential impact is low
private String mLastHomePackageName;
private @WindowConfiguration.ActivityType int mLastActivityType;
private boolean mLastActivityHasNoHomeSound = false;
private int mLastTaskId;
@Inject
public HomeSoundEffectController(
Context context,
AudioManager audioManager,
TaskStackChangeListeners taskStackChangeListeners,
ActivityManagerWrapper activityManagerWrapper,
PackageManager packageManager) {
mAudioManager = audioManager;
mTaskStackChangeListeners = taskStackChangeListeners;
mActivityManagerWrapper = activityManagerWrapper;
mPm = packageManager;
mPlayHomeSoundAfterAssistant = context.getResources().getBoolean(
R.bool.config_playHomeSoundAfterAssistant);
mPlayHomeSoundAfterDream = context.getResources().getBoolean(
R.bool.config_playHomeSoundAfterDream);
}
@Override
public void start() {
if (mAudioManager.isHomeSoundEffectEnabled()) {
mTaskStackChangeListeners.registerTaskStackListener(
new TaskStackChangeListener() {
@Override
public void onTaskStackChanged() {
ActivityManager.RunningTaskInfo currentTask =
mActivityManagerWrapper.getRunningTask();
if (currentTask == null || currentTask.topActivityInfo == null) {
return;
}
handleTaskStackChanged(currentTask);
}
});
}
}
private boolean hasFlagNoSound(ActivityInfo activityInfo) {
if ((activityInfo.privateFlags & ActivityInfo.PRIVATE_FLAG_HOME_TRANSITION_SOUND) == 0) {
// Only allow flag if app has permission
if (mPm.checkPermission(Manifest.permission.DISABLE_SYSTEM_SOUND_EFFECTS,
activityInfo.packageName) == PackageManager.PERMISSION_GRANTED) {
return true;
} else {
Slog.w(TAG,
"Activity has flag playHomeTransition set to false but doesn't hold "
+ "required permission "
+ Manifest.permission.DISABLE_SYSTEM_SOUND_EFFECTS);
return false;
}
}
return false;
}
/**
* The home sound is played if all of the following conditions are met:
* <ul>
* <li>The last task which moved to front was not home. This avoids playing the sound
* e.g. after FallbackHome transitions to home, another activity of the home app like a
* notification panel moved to front, or in case the home app crashed.</li>
* <li>The current activity which moved to front is home</li>
* <li>The topActivity of the last task has {@link android.R.attr#playHomeTransitionSound} set
* to <code>true</code>.</li>
* <li>The topActivity of the last task is not of type
* {@link WindowConfiguration#ACTIVITY_TYPE_ASSISTANT} if config_playHomeSoundAfterAssistant is
* set to <code>false</code> (default).</li>
* <li>The topActivity of the last task is not of type
* {@link WindowConfiguration#ACTIVITY_TYPE_DREAM} if config_playHomeSoundAfterDream is
* set to <code>false</code> (default).</li>
* </ul>
*/
private boolean shouldPlayHomeSoundForCurrentTransition(
ActivityManager.RunningTaskInfo currentTask) {
boolean isHomeActivity =
currentTask.topActivityType == WindowConfiguration.ACTIVITY_TYPE_HOME;
if (currentTask.taskId == mLastTaskId) {
return false;
}
if (mIsLastTaskHome || !isHomeActivity) {
return false;
}
if (mLastActivityHasNoHomeSound) {
return false;
}
if (mLastActivityType == WindowConfiguration.ACTIVITY_TYPE_ASSISTANT
&& !mPlayHomeSoundAfterAssistant) {
return false;
}
if (mLastActivityType == WindowConfiguration.ACTIVITY_TYPE_DREAM
&& !mPlayHomeSoundAfterDream) {
return false;
}
return true;
}
private void updateLastTaskInfo(ActivityManager.RunningTaskInfo currentTask) {
mLastTaskId = currentTask.taskId;
mLastActivityType = currentTask.topActivityType;
mLastActivityHasNoHomeSound = hasFlagNoSound(currentTask.topActivityInfo);
boolean isHomeActivity =
currentTask.topActivityType == WindowConfiguration.ACTIVITY_TYPE_HOME;
boolean isHomePackage = currentTask.topActivityInfo.packageName.equals(
mLastHomePackageName);
mIsLastTaskHome = isHomeActivity || isHomePackage;
if (isHomeActivity && !isHomePackage) {
mLastHomePackageName = currentTask.topActivityInfo.packageName;
}
}
private void handleTaskStackChanged(ActivityManager.RunningTaskInfo frontTask) {
if (shouldPlayHomeSoundForCurrentTransition(frontTask)) {
mAudioManager.playSoundEffect(AudioManager.FX_HOME);
}
updateLastTaskInfo(frontTask);
}
}
|
