关于安卓广播无法启动接收器的问题

Unable to start receiver activitytest.example.com.receive.MyBroadcastReceiver: java.lang.UnsupportedOperationException: 接收不到

public class MyBroadcastReceiver extends BroadcastReceiver {
    public MyBroadcastReceiver() {
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO: This method is called when the BroadcastReceiver is receiving
        // an Intent broadcast.
        Toast.makeText(context, "received in MyBroadcastReceiver", Toast.LENGTH_SHORT).show();
//        throw new UnsupportedOperationException("接收不到");
    }
}

要去掉throw new UnsupportedOperationException 才不会报错