android 电池电量检测，充电显示效果

@Override
protected void onResume() {
super.onResume();
register();
}

@Override
protected void onPause() {
super.onPause();
unregister();
}

private void register() {
registerReceiver(batteryChangedReceiver,  new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
}

private void unregister() {
unregisterReceiver(batteryChangedReceiver);
}

// 接受广播
private BroadcastReceiver batteryChangedReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
if (Intent.ACTION_BATTERY_CHANGED.equals(intent.getAction())) {
int status = intent.getIntExtra("status", 0);
int level = intent.getIntExtra("level", 0);
int scale = intent.getIntExtra("scale", 100);
int power = level * 100 / scale;
Log.d("Deom", "电池电量：:" + power);
switch (status) {
case BatteryManager.BATTERY_STATUS_UNKNOWN:
break;
case BatteryManager.BATTERY_STATUS_CHARGING:
showMessage("充电");
mBatteryView.setImageResource(R.drawable.stat_sys_battery_charge);
mBatteryView.getDrawable().setLevel(level);
break;
case BatteryManager.BATTERY_STATUS_DISCHARGING:
showMessage(level+"");
mBatteryView.setImageResource(R.drawable.stat_sys_battery);
mBatteryView.getDrawable().setLevel(level);
break;
case BatteryManager.BATTERY_STATUS_NOT_CHARGING:
break;
case BatteryManager.BATTERY_STATUS_FULL:
break;
}

//                  mBatteryView.setPower(power);
}
}
};

<ImageView
android:id="@+id/battery_view"
android:layout_width="0px"
android:layout_height="match_parent"
android:layout_weight="1"
android:layout_marginRight="100px" />