android - 推送通知不适用于 FCM

Question

我正尝试在我的 Android 应用程序中使用 Firebase 获取推送通知。问题是当应用程序在前台时，我收到通知并调用 onMessageReceived()，但是当我在后台时，我没有收到任何通知并且 onMessageRecieved 未被调用。

我做错了什么？

list .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());

    }
}

Answer 1

想通了。这是 Firebase SDK 处理服务器响应的方式的问题。我在服务器端使用“通知”字段发送通知。

Notification = 仅在应用程序处于前台时显示通知。这是 Firebase SDK/GCM SDK 的规则

Data = 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，我是这样做的:

body: JSON.stringify({
            notification: {
            data: {
                 title: message
             },
             to : '/topics/user_'+username

Further Info