android - 如何使用android中的Broadcast Receiver来振动设备？

Question

public class MyBroadcastReceiver extends BroadcastReceiver{
    public void onReceive(Context context , Intent intent){
        Toast.makeText(context, "Your time is up", Toast.LENGTH_LONG).show();
        Vibrator vibrator; 
        // ERROR here (vibrator)context.getSystemService(Context.VIBRATOR_SERVICE);
        vibrator.vibrate(2000);
    }
}

在使用Alarm时使用Broadcast Receiver振动设备时，出现如上图所示的错误。这里出错的可能原因是什么？

Answer 1

试试这个

Vibrator v;
v=(Vibrator)context.getSystemService(Context.VIBRATOR_SERVICE);
v.vibrate(3000);