InactivityTimer.java
3.45 KB
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
/*
* Copyright (C) 2010 ZXing authors
*
* 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.yzq.zxinglibrary.android;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.AsyncTask;
import android.os.BatteryManager;
import android.util.Log;
/**
*
* Finishes an activity after a period of inactivity if the device is on battery
* power. 如果设备使用电池供电，一段时间不活动之后结束activity
*
* 供电控制
*/
public final class InactivityTimer {
private static final String TAG = InactivityTimer.class.getSimpleName();
private static final long INACTIVITY_DELAY_MS = 5 * 60 * 1000L;
private final Activity activity;
private final BroadcastReceiver powerStatusReceiver;
private boolean registered;
private AsyncTask<Object, Object, Object> inactivityTask;
public InactivityTimer(Activity activity) {
this.activity = activity;
powerStatusReceiver = new PowerStatusReceiver();
registered = false;
onActivity();
}
@SuppressLint("NewApi")
public
synchronized void onActivity() {
cancel();
inactivityTask = new InactivityAsyncTask();
inactivityTask.execute();
}
public synchronized void onPause() {
cancel();
if (registered) {
activity.unregisterReceiver(powerStatusReceiver);
registered = false;
} else {
Log.w(TAG, "PowerStatusReceiver was never registered?");
}
}
public synchronized void onResume() {
if (registered) {
Log.w(TAG, "PowerStatusReceiver was already registered?");
} else {
activity.registerReceiver(powerStatusReceiver, new IntentFilter(
Intent.ACTION_BATTERY_CHANGED));
registered = true;
}
onActivity();
}
private synchronized void cancel() {
AsyncTask<?, ?, ?> task = inactivityTask;
if (task != null) {
task.cancel(true);
inactivityTask = null;
}
}
public void shutdown() {
cancel();
}
/**
* 电量状态receiver
* @author qichunjie
*
*/
private final class PowerStatusReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (Intent.ACTION_BATTERY_CHANGED.equals(intent.getAction())) {
// 0 indicates that we're on battery
boolean onBatteryNow = intent.getIntExtra(
BatteryManager.EXTRA_PLUGGED, -1) <= 0;
if (onBatteryNow) {
InactivityTimer.this.onActivity();
} else {
InactivityTimer.this.cancel();
}
}
}
}
/**
* 设备休眠5分钟，关闭activity
* @author qichunjie
*
*/
private final class InactivityAsyncTask extends
AsyncTask<Object, Object, Object> {
@Override
protected Object doInBackground(Object... objects) {
try {
Thread.sleep(INACTIVITY_DELAY_MS);
Log.i(TAG, "Finishing activity due to inactivity");
activity.finish();
} catch (InterruptedException e) {
// continue without killing
}
return null;
}
}
}