Android

Question

跟大家讨论一个场景，让app在前台Activity "X"打开。现在我的应用程序通过 Firebase 消息服务收到了通知。我想要的是？我希望如果我的应用程序在前台，我的 activity "X" 可以检测到我是否收到通知，以便我可以切换图标。

这是我的 Firebase 消息服务代码：

 @Override
public void onMessageReceived(RemoteMessage message){
    type=message.getData().get("type");
    CrucialData.setReceivedNotificationWithoutChecking(true);
    createNotification(message);
}

private void createNotification(RemoteMessage message) {
    Context context = getBaseContext();
    checkingIfAppIsInForeground(context);
    if(!inForeground){
        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context)
                .setSmallIcon(R.drawable.appicon)
                .setColor(getResources().getColor(R.color.colorPrimaryDark))
                .setContentTitle("Your chat is going to expire tomorrow!")
                .setAutoCancel(true);

        // Creates an explicit intent for an Activity in your app
        Intent resultIntent = new Intent(this, main_activity.class);

        resultIntent.putExtra("launchedFromNotification",true);

        // The stack builder object will contain an artificial back stack for the
        // started Activity.
        // This ensures that navigating backward from the Activity leads out of
        // your app to the Home screen.
        TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
        // Adds the back stack for the Intent (but not the Intent itself)
        stackBuilder.addParentStack(main_activity.class);
        // Adds the Intent that starts the Activity to the top of the stack
        stackBuilder.addNextIntent(resultIntent);
        PendingIntent resultPendingIntent =
                stackBuilder.getPendingIntent(
                        0,
                        PendingIntent.FLAG_UPDATE_CURRENT
                );

        mBuilder.setContentIntent(resultPendingIntent);
        NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        // mNotificationId is a unique integer your app uses to identify the
        mNotificationManager.notify(1231, mBuilder.build());
    }

Answer 1

您可以使用 Local Broadcast 在您的服务和 activity 之间进行通信。

这是一个 example。

Android - 我的 Activity 如何检测到我在 Firebase 消息服务中收到通知？

Android - How can my Activity detect that I received a notification in Firebase Messaging Service?

notifications

foreground

push-notification