當應用程序處於後臺或未運行時，推送通知無法正常工作

我正在使用Firebase雲消息傳遞發送推送通知。當應用程序處於後臺或未運行時，推送通知無法正常工作

這是我FirebaseMessageService：

public class FireBaseMessageService extends FirebaseMessagingService { 


@Override 
public void onMessageReceived(RemoteMessage remoteMessage) { 
    Log.e("TAG", "From: " + remoteMessage.getFrom()); 
    Log.e("TAG", "Notification Message Body: " + remoteMessage.getData().get("CardName")+" : "+remoteMessage.getData().get("CardCode")); 
    sendNotification(remoteMessage.getNotification().getBody()); 
} 


private void sendNotification(String messageBody) { 
    Intent intent = new Intent(this, StartActivity.class); 
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent, 
      PendingIntent.FLAG_ONE_SHOT); 

    Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION); 
    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this) 
      .setSmallIcon(R.mipmap.ic_launcher_final) 
      .setContentTitle("Notification") 
      .setContentText(messageBody) 
      .setTicker("Test") 
      .setAutoCancel(true) 
      .setDefaults(Notification.DEFAULT_SOUND) 
      .setContentIntent(pendingIntent); 

    NotificationManager notificationManager = 
      (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); 

     notificationManager.notify(0 /* ID of notification */, notificationBuilder.build()); 
    } 
}

而且FirebaseInstanceServer：

public class FirebaseInstanceService extends FirebaseInstanceIdService { 


@Override 
public void onTokenRefresh() { 
    // Get updated InstanceID token. 
    String refreshedToken = FirebaseInstanceId.getInstance().getToken(); 
    Log.e("TAG", "Refreshed token: " + refreshedToken); 

    // TODO: Implement this method to send any registration to your app's servers. 
    sendRegistrationToServer(refreshedToken); 

} 

private void sendRegistrationToServer(String token) { 


     // Add custom implementation, as needed. 
     Log.e("TAG", "Refreshed token2: " + token); 
    } 
}

這是在AndroidManifest聲明：

<service 
    android:name=".util.notifications.FireBaseMessageService"> 
    <intent-filter> 
     <action android:name="com.google.firebase.MESSAGING_EVENT"/> 
    </intent-filter> 
</service> 

<service 
    android:name=".util.notifications.FirebaseInstanceService"> 
    <intent-filter> 
     <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/> 
    </intent-filter> 
</service>

所以問題是，當應用程序正在運行ticker是表現良好，通知com e默認聲音，但是當App處於前臺或未運行通知時，沒有任何聲音，並且ticker未顯示在狀態欄中。
爲什麼會發生這種情況，我該如何解決？

來源

2016-06-17 Ololoking