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
|
/*
* Copyright (C) 2018 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.quickstep;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import com.android.launcher3.MainThreadExecutor;
import com.android.quickstep.ActivityControlHelper.ActivityInitListener;
import com.android.quickstep.util.RemoteAnimationProvider;
import java.lang.ref.WeakReference;
import java.util.function.BiPredicate;
/**
* Utility class to track create/destroy for some {@link BaseRecentsActivity}.
*/
@TargetApi(Build.VERSION_CODES.P)
public class RecentsActivityTracker<T extends BaseRecentsActivity> implements ActivityInitListener {
private static WeakReference<BaseRecentsActivity> sCurrentActivity =
new WeakReference<>(null);
private static final Scheduler sScheduler = new Scheduler();
private final BiPredicate<T, Boolean> mOnInitListener;
public RecentsActivityTracker(BiPredicate<T, Boolean> onInitListener) {
mOnInitListener = onInitListener;
}
@Override
public void register() {
sScheduler.schedule(this);
}
@Override
public void unregister() {
sScheduler.clearReference(this);
}
private boolean init(T activity, boolean visible) {
return mOnInitListener.test(activity, visible);
}
public static <T extends BaseRecentsActivity> T getCurrentActivity() {
return (T) sCurrentActivity.get();
}
@Override
public void registerAndStartActivity(Intent intent, RemoteAnimationProvider animProvider,
Context context, Handler handler, long duration) {
register();
Bundle options = animProvider.toActivityOptions(handler, duration, context).toBundle();
context.startActivity(intent, options);
}
public static void onRecentsActivityCreate(BaseRecentsActivity activity) {
sCurrentActivity = new WeakReference<>(activity);
sScheduler.initIfPending(activity, false);
}
public static void onRecentsActivityNewIntent(BaseRecentsActivity activity) {
sScheduler.initIfPending(activity, activity.isStarted());
}
public static void onRecentsActivityDestroy(BaseRecentsActivity activity) {
if (sCurrentActivity.get() == activity) {
sCurrentActivity.clear();
}
}
private static class Scheduler implements Runnable {
private WeakReference<RecentsActivityTracker> mPendingTracker = new WeakReference<>(null);
private MainThreadExecutor mMainThreadExecutor;
public synchronized void schedule(RecentsActivityTracker tracker) {
mPendingTracker = new WeakReference<>(tracker);
if (mMainThreadExecutor == null) {
mMainThreadExecutor = new MainThreadExecutor();
}
mMainThreadExecutor.execute(this);
}
@Override
public void run() {
BaseRecentsActivity activity = sCurrentActivity.get();
if (activity != null) {
initIfPending(activity, activity.isStarted());
}
}
public synchronized boolean initIfPending(BaseRecentsActivity activity,
boolean alreadyOnHome) {
RecentsActivityTracker tracker = mPendingTracker.get();
if (tracker != null) {
if (!tracker.init(activity, alreadyOnHome)) {
mPendingTracker.clear();
}
return true;
}
return false;
}
public synchronized boolean clearReference(RecentsActivityTracker tracker) {
if (mPendingTracker.get() == tracker) {
mPendingTracker.clear();
return true;
}
return false;
}
}
}
|
