Question

FCM（Firebase云消息传递）中有两种类型的消息：

显示消息：仅当您的应用处于前台时，这些消息才会触发onMessageReceived（）回调

数据讯息：即使您的应用处于前台/后台/被杀，这些消息也会触发onMessageReceived（）回调

当在前台收到通知时，我可以在通知时打开特定活动，但是当在后台中收到通知时，我无法处理通知按（它会自动启动主要活动）

我做了一些搜索并发现：

我将这些intent-filter添加到我的通知活动中：

<activity android:name="com.mahdi.tiger.alahedclubnewtesting.activity.News_description"
            android:exported="true">
            <intent-filter>
                <action android:name="com.mahdi.tiger.alahedclubnewtesting.activity.News_description"></action>
                <category android:name="android.intent.category.DEFAULT"></category>
            </intent-filter>
        </activity>

但它不起作用..

我也找到了：

When your app is in the background, Android directs notification messages to the system tray. A user tap on the notification opens the app launcher by default.

那我该怎么办？我希望在后台收到通知以处理点击并打开我的特定活动。

这是我正在使用的代码：

    public class myFirebaseMessagingService extends FirebaseMessagingService {

        private static final String TAG = "FirebaseMessageService";
        Bitmap bitmap;

        /**
         * Called when message is received.
         *
         * @param remoteMessage Object representing the message received from Firebase Cloud Messaging.
         */
        @Override
        public void onMessageReceived(RemoteMessage remoteMessage) {
            // 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
            //
            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());

                String title=remoteMessage.getNotification().getTitle();
                String body=remoteMessage.getNotification().getBody();
                String action=remoteMessage.getNotification().getClickAction();



                sendNotification2(title,body,action);
            }

            //The message which i send will have keys named [message, image, AnotherActivity] and corresponding values.
            //You can change as per the requirement.
            String text = remoteMessage.getData().get("title");
            //message will contain the Push Message
            String message = remoteMessage.getData().get("message");
            //imageUri will contain URL of the image to be displayed with Notification
            //If the key AnotherActivity has  value as True then when the user taps on notification, in the app AnotherActivity will be opened.
            //If the key AnotherActivity has  value as False then when the user taps on notification, in the app MainActivity will be opened.
            String TrueOrFlase = remoteMessage.getData().get("AnotherActivity");

            //To get a Bitmap image from the URL received
            sendNotification(message, text,TrueOrFlase);

        }


        /**
         * Create and show a simple notification containing the received FCM message.
         */

        private void sendNotification(String messageBody,String text, String TrueOrFalse) {
            Intent intent = new Intent(this, Slider_description.class);
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            intent.putExtra("AnotherActivity", TrueOrFalse);
            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.ahed_me)
                    .setContentTitle(text)
                    .setAutoCancel(true)
                    .setContentText(messageBody)
                    .setSound(defaultSoundUri)
                    .setContentIntent(pendingIntent);

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

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

注意：我正在使用Firebase控制台发送通知。

非常感谢。

Answer 1

经过一些测试后我发现了这一点。

https://github.com/firebase/quickstart-android/blob/master/messaging/app/src/main/java/com/google/firebase/quickstart/fcm/MyFirebaseMessagingService.java

有趣的部分适合你。

有两种类型的消息数据消息和通知消息。数据消息在onMessageReceived中处理是否该应用程序位于前台或后台。数据消息是类型传统上与GCM一起使用。仅接收通知消息这里是onMessageReceived，当应用程序在前台时。当。。。的时候 app是在后台自动生成的通知显示。当用户点击通知时，他们将返回该应用程序。包含通知和数据有效负载的消息是作为通知消息处理。 Firebase控制台始终发送 notificationmessages。

有关详情，请参阅：https://firebase.google.com/docs/cloud-messaging/concept-options

如果您想要完全控制通知，则需要发送数据信息。根据我的理解，你不能使用firebase控制台。

在后台单击通知时打开特定活动

1 个答案: