Firebase雲消息傳遞onMessageReceived沒有被觸發

Question

按照Firebase dev docs的指示，我已經實現了一個擴展FirebaseMessagingService並覆蓋onMessageReceived回調的服務。我在onMessageReceived方法的第一行放置了一條日誌消息。

應用程序運行在後臺 我沒有在日誌中看到logcat的，但我看到張貼在系統試的通知。

應用前景 我不能看日誌也沒有在系統托盤中的通知

任何想法是怎麼回事？

艙單

<service 
     android:name=".fcm.MovieMessagingService"> 
     <intent-filter> 
      <action android:name="com.google.firebase.MESSAGING_EVENT"/> 
     </intent-filter> 
    </service> 

服務類

public class MovieMessagingService extends FirebaseMessagingService { 

    private static final String LOG_TAG = MovieMessagingService.class.getSimpleName(); 

    @Override 
    public void onMessageReceived(RemoteMessage remoteMessage) { 


     Log.d(LOG_TAG, "From: " + remoteMessage.getFrom()); 

    } 

    /** 
    * Create and show a simple notification containing the received FCM message. 
    * 
    * @param messageBody FCM message body received. 
    */ 
    private void sendNotification(String messageBody) { 
     Log.d(LOG_TAG, "Presenting Notification with message body: " + messageBody); 
//more code 
    } 
} 

Answer 1

實際上，應用程序的行爲，而接收消息既包括通知和數據有效載荷，取決於該應用是否是在背景或前景等：

當在後臺時，應用程序會在通知托盤中收到通知有效內容，並且只在用戶ta時處理數據有效內容ps通知。

當處於前臺時，您的應用程序會收到一個消息對象，並且兩個負載均已附加。

因此，總結是，當應用程序在後臺，你可以看到在系統托盤中的通知，不能看到任何日誌，直到攻的通知，但你會看到開場僅活動日誌不是服務日誌中它已經被執行。

而當前臺應用程序中您可以看到logcat中的日誌，但在系統托盤中看不到任何通知，因爲您的應用程序已經打開狀態，您將只收到數據有效載荷。

Answer 2

以下是如何接收消息以及如何處理不同類型的代碼示例。這裏是代碼的source。

public class MyFirebaseMessagingService extends FirebaseMessagingService { 

private static final String TAG = "MyFirebaseMsgService"; 

/** 
* Called when message is received. 
* 
* @param remoteMessage Object representing the message received from Firebase Cloud Messaging. 
*/ 
// [START receive_message] 
@Override 
public void onMessageReceived(RemoteMessage remoteMessage) { 
    // [START_EXCLUDE] 
    // There are two types of messages data messages and notification messages. Data messages are handled 
    // here in onMessageReceived whether the app is in the foreground or background. Data messages are the type 
    // traditionally used with GCM. Notification messages are only received here in onMessageReceived when the app 
    // is in the foreground. When the app is in the background an automatically generated notification is displayed. 
    // When the user taps on the notification they are returned to the app. Messages containing both notification 
    // and data payloads are treated as notification messages. The Firebase console always sends notification 
    // messages. For more see: https://firebase.google.com/docs/cloud-messaging/concept-options 
    // [END_EXCLUDE] 

    Log.d(TAG, "From: " + remoteMessage.getFrom()); 

    // Check if message contains a data payload. 
    if (remoteMessage.getData().size() > 0) { 
     Log.d(TAG, "Message data payload: " + remoteMessage.getData()); 
    } 

    // Check if message contains a notification payload. 
    if (remoteMessage.getNotification() != null) { 
     Log.d(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody()); 
    } 

}