谁有关于电池显示电量的源码

求。。

图上的软件

围观

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
int level = intent.getIntExtra("level", 0);
//电量的总刻度
int scale = intent.getIntExtra("scale", 100);
//把它转成百分比
tv.setText("电池电量为"+((level*100)/scale)+"%");
}
}
}
//注册广播接受者java代码
IntentFilter intentFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
//创建广播接受者对象
BatteryReceiver batteryReceiver = new BatteryReceiver();
//注册receiver
registerReceiver(batteryReceiver, intentFilter);