android获取当前电量

2019-04-14 19:19发布

站内文章 / 模拟电子
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新建一个Receiver用于接受ACTION_BATTERY_CHANGED广播。    private int mBatteryLevel; private int mBatteryScale; class BatteryReceiver extends BroadcastReceiver{ @Override public void onReceive(Context context, Intent intent) { // TODO Auto-generated method stub //判断它是否是为电量变化的Broadcast Action if(Intent.ACTION_BATTERY_CHANGED.equals(intent.getAction())){ //获取当前电量 mBatteryLevel = intent.getIntExtra("level", 0); //电量的总刻度 mBatteryScale = intent.getIntExtra("scale", 100); } } }
在onCreate中： IntentFilter intentFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED); BatteryReceiver batteryReceiver = new BatteryReceiver(); registerReceiver(batteryReceiver, intentFilter); mBackupManager = IBackupManager.Stub.asInterface( ServiceManager.getService(Context.BACKUP_SERVICE));
这里有一点需要注意，ACTION_BATTERY_CHANGED广播为粘性广播，所以已注册就会会调用onReceive,获取到当前的电量信息。

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