我做错了什么？
Manifest.xml $ b
< service android：name =。 notifications.MyFirebaseMessagingService> < intent-filter android：priority =2147483647> < action android：name =com.google.firebase.MESSAGING_EVENT/> < / intent-filter> < / service>MyFirebaseMessagingService.class
public class MyFirebaseMessagingService extends FirebaseMessagingService { $ b @Override public void onCreate（）{ super.onCreate（）; Log.e（MessagingService，onCreate Firebase服务）; $ b @Override public void onMessageReceived（RemoteMessage remoteMessage）{ Log.e（MessagingService，onMessageRecieved）; String body = remoteMessage.getData（）。get（body）; ooVooSdkSampleShowApp application =（ooVooSdkSampleShowApp）getApplication（）; Intent intent = new Intent（application.getContext（），MainActivity.class）; PendingIntent contentIntent = PendingIntent.getActivity（application.getContext（），0，intent，PendingIntent.FLAG_UPDATE_CURRENT）; NotificationCompat.Builder b = new NotificationCompat.Builder（application.getContext（））; b.setAutoCancel（false） .setDefaults（Notification.DEFAULT_ALL） .setWhen（System.currentTimeMillis（）） .setSmallIcon（R.drawable.image_calendar_red ） .setContentText（body） .setDefaults（Notification.DEFAULT_LIGHTS | Notification.DEFAULT_SOUND） .setContentIntent（contentIntent） .setContentInfo（Info）; NotificationManager notificationManager =（NotificationManager）application.getContext（）。getSystemService（Context.NOTIFICATION_SERVICE）; notificationManager.notify（1，b.build（））; $ b $ / code $ / $ p 解决方案算出来了。这是由Firebase SDK处理服务器响应的问题。我通过服务器端的通知字段发送通知。
通知 =只在应用程序处于前台时显示通知。这是Firebase SDK / GCM SDK的规则
$ b 数据 =当应用程序处于后台时显示通知。这是Firebase SDK / GCM SDK的规则。在服务器端，我这样做了：
body：JSON.stringify（{ notification：{ data：{ title：message }， to ：'/ topics / user _'+ username更多信息
I am trying to get push notifications using Firebase in my Android app. The problem is when the app is in the foreground, I receive the notification and onMessageReceived() is called, however when I am on the background, I don't receive any notification and the onMessageRecieved isn't called.
What am I doing wrong?
Manifest.xml
<service android:name=".notifications.MyFirebaseMessagingService"> <intent-filter android:priority="2147483647"> <action android:name="com.google.firebase.MESSAGING_EVENT"/> </intent-filter> </service>MyFirebaseMessagingService.class
public class MyFirebaseMessagingService extends FirebaseMessagingService { @Override public void onCreate() { super.onCreate(); Log.e("MessagingService", "onCreate Firebase Service"); } @Override public void onMessageReceived(RemoteMessage remoteMessage) { Log.e("MessagingService", "onMessageRecieved"); String body = remoteMessage.getData().get("body"); ooVooSdkSampleShowApp application = (ooVooSdkSampleShowApp) getApplication(); Intent intent = new Intent(application.getContext(), MainActivity.class); PendingIntent contentIntent = PendingIntent.getActivity(application.getContext(), 0, intent, PendingIntent.FLAG_UPDATE_CURRENT); NotificationCompat.Builder b = new NotificationCompat.Builder(application.getContext()); b.setAutoCancel(false) .setDefaults(Notification.DEFAULT_ALL) .setWhen(System.currentTimeMillis()) .setSmallIcon(R.drawable.image_calendar_red) .setContentText(body) .setDefaults(Notification.DEFAULT_LIGHTS | Notification.DEFAULT_SOUND) .setContentIntent(contentIntent) .setContentInfo("Info"); NotificationManager notificationManager = (NotificationManager) application.getContext().getSystemService(Context.NOTIFICATION_SERVICE); notificationManager.notify(1, b.build()); } }解决方案
Figured it out. It was the problem with the way server response being handled by Firebase SDK. I was sending notification using "notification" field from the server side.
Notification = Just show Notification when the app is in foreground. This is the rule for Firebase SDK/ GCM SDK
Data = Show Notification when the app is in background. This is the rule for Firebase SDK/GCM SDK.
On server side, I have done it like this:
body: JSON.stringify({ notification: { data: { title: message }, to : '/topics/user_'+usernameFurther Info
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