Android 如果在应用程序处于后台时单击firebase通知，则应用程序将重新加载

当应用程序运行时，如果我单击它，通知将发出警报，通知将转到那里（

onMessageReceived

正在运行）

但当应用程序位于后台，并且如果我单击它，通知将发出警报时，应用程序将再次重新加载（最初如启动屏幕），而不是转到那里，并且

onMessageReceived

未运行

如何修复它

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ps.对不起，我的英语不好。

您需要将所需的活动作为intent传递，而不是主活动

将活动名称指定给待定intent

      Intent intent = new Intent(this, NotificationCheck.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);
    notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.drawable.ic_launcher)
                .setContentTitle("App Name")
                .setContentText(messageBody)
                .setAutoCancel(true)
                .setStyle(new NotificationCompat.BigTextStyle().bigText(messageBody))
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent);

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

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

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请参阅下面的代码。我正在使用它，它开启了我的家庭活动

NotificationManager notificationManager = (NotificationManager) context
        .getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification(icon, message, when);
//change HomeActivity.class which activity you want to open after clicking notification
Intent notificationIntent = new Intent(context, HomeActivity.class);

notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
        | Intent.FLAG_ACTIVITY_SINGLE_TOP);

PendingIntent intent = PendingIntent.getActivity(context, 0,
        notificationIntent, 0);

notification.setLatestEventInfo(context, title, message, intent);
notification.flags |= Notification.FLAG_AUTO_CANCEL;
notificationManager.notify(0, notification);

更改HomeActivity.class单击通知后要打开的活动。。希望它能起作用

/**
 * Method checks if the app is in background or not
 */
public static boolean isAppIsInBackground(Context context) {
    boolean isInBackground = true;
    ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT_WATCH) {
        List<ActivityManager.RunningAppProcessInfo> runningProcesses = am.getRunningAppProcesses();
        for (ActivityManager.RunningAppProcessInfo processInfo : runningProcesses) {
            if (processInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
                for (String activeProcess : processInfo.pkgList) {
                    if (activeProcess.equals(context.getPackageName())) {
                        isInBackground = false;
                    }
                }
            }
        }
    } else {
        List<ActivityManager.RunningTaskInfo> taskInfo = am.getRunningTasks(1);
        ComponentName componentInfo = taskInfo.get(0).topActivity;
        if (componentInfo.getPackageName().equals(context.getPackageName())) {
            isInBackground = false;
        }
    }

    return isInBackground;
}

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我希望它能帮助您。

Intent-Intent=新的Intent（context，TargetActivity.class）；我的应用程序当应用程序在后台时，如果我单击它，通知将发出警报，onMessageReceived未运行。请将代码放在此处。。没有代码的bocaz我们无法理解这个问题。要推送方法的类在哪里

isAppIsInBackground

将此方法放在NotificationUtils类中，然后您可以在MyFirebaseMessagingService类中使用它。

private void handleNotification(String message) {
    if (!NotificationUtils.isAppIsInBackground(getApplicationContext())) {
        // app is in foreground, broadcast the push message
        Intent pushNotification = new Intent(Config.PUSH_NOTIFICATION);
        pushNotification.putExtra("message", message);
        LocalBroadcastManager.getInstance(this).sendBroadcast(pushNotification);

        // play notification sound
        NotificationUtils notificationUtils = new NotificationUtils(getApplicationContext());
        notificationUtils.playNotificationSound();
    }else{
        // If the app is in background, firebase itself handles the notification
    }
}