读取 android 设备的电池信息，android电池,通过创建Broadcas

读取 android 设备的电池信息，android电池,通过创建Broadcas

通过创建BroadcastReceiver来侦测系统中有关电池Intent(ACTION_BATTERY_CHANGED)的变化，一旦有接收到相关事件，将会读取当前电量情况，并通过TextViews显示在当前屏幕。```java

public class Main extends Activity {

private TextView contentTxt; private BroadcastReceiver mBatInfoReceiver = newBroadcastReceiver(){

 @Override  public void onReceive(Context arg0, Intent intent) {    // TODO Auto-generated method stub    int level = intent.getIntExtra("level", 0);    contentTxt.setText(String.valueOf(level) + "%");  }

};

@Override public void onCreate(Bundle) { super.onCreate(icicle); setContentView(R.layout.main); contentTxt = (TextView) this.findViewById(R.id.monospaceTxt); this.registerReceiver(this.mBatInfoReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED)); }

}

```