在firebase_messaging dev14中，如何在用户单击通知时打开屏幕(背景)

// 在你的MainActivity中注册广播接收器
public class MainActivity extends AppCompatActivity {
    private BroadcastReceiver notificationReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            // 处理用户点击通知的事件
            String notificationTitle = intent.getStringExtra("title");
            String notificationContent = intent.getStringExtra("content");
            
            // 打开指定的屏幕（背景）
            Intent openScreenIntent = new Intent(MainActivity.this, YourBackgroundScreen.class);
            openScreenIntent.putExtra("title", notificationTitle);
            openScreenIntent.putExtra("content", notificationContent);
            startActivity(openScreenIntent);
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 注册广播接收器
        IntentFilter filter = new IntentFilter("com.yourapp.ACTION_NOTIFICATION_CLICKED");
        registerReceiver(notificationReceiver, filter);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        // 取消注册广播接收器
        unregisterReceiver(notificationReceiver);
    }
}

// 在你的FirebaseMessagingService中发送广播
public class MyFirebaseMessagingService extends FirebaseMessagingService {
    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        // 处理收到的通知消息
        String notificationTitle = remoteMessage.getNotification().getTitle();
        String notificationContent = remoteMessage.getNotification().getBody();

        // 发送广播，通知MainActivity用户点击了通知
        Intent notificationClickedIntent = new Intent("com.yourapp.ACTION_NOTIFICATION_CLICKED");
        notificationClickedIntent.putExtra("title", notificationTitle);
        notificationClickedIntent.putExtra("content", notificationContent);
        sendBroadcast(notificationClickedIntent);
    }
}