FirebaseMessagingService 中的反跳 FCM 通知

Question

场景

我定期从 FCM 接收数据通知。通知触发同步操作

问题

有时通知会突然出现，从而同时触发多个同步操作

解决方案

FirebaseMessagingService 的去抖动

public class MyFirebaseMessagingService extends FirebaseMessagingService {

    /**
     * Called when message is received.
     *
     * @param remoteMessage Object representing the message received from Firebase Cloud Messaging.
     */
    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
       if(remoteMessage.getData().containsKey("one_notification_key")){
            // DEBOUNCE -> execute the code only once after some cooling period
       }
    }
}

问题：如何在这种情况下实现去抖动？

*请注意，我不想执行第一个而忽略其余的一段时间。我宁愿从跨越一段时间的一系列通知中执行最后一个

Answer 1

示例如果另一条消息在不到 1 秒后到达，则如何忽略以前的消息。

        private RemoteMessage lastMessage;

        Handler handler =  new Handler(Looper.getMainLooper());
        Runnable runnable = new Runnable() {
            @Override
            public void run() {
                executeOperation(lastMessage);
            }
        };



        //When one message arrives
        lastMessage = remoteMessage;
        handler.removeCallbacks(runnable);
        handler.postDelayed(runnable, 1000);