android - 当应用程序在前台运行时，在警报框中显示推送通知

Question

我正在由 GCM 触发的我的 android 应用程序中进行推送通知。如果应用程序正在警告框中运行，我想显示通知，如果应用程序未运行意味着不在前台仅显示状态栏通知，您如何确定应用程序是否正在运行并且在前台？是这可以显示这样的通知。现在正在使用此代码显示状态栏推送通知

  NotificationManager notificationManager = (NotificationManager)
                context.getSystemService(Context.NOTIFICATION_SERVICE);
        Notification notification = new Notification(icon, message, when);

        String title = context.getString(R.string.app_name);

         Intent notificationIntent = new Intent(context, BottomActivity.class);
        // set intent so it does not start a new activity
        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;

        // Play default notification sound
        notification.defaults |= Notification.DEFAULT_SOUND;

        //notification.sound = Uri.parse("android.resource://" + context.getPackageName() + "your_sound_file_name.mp3");

        // Vibrate if vibrate is enabled
        notification.defaults |= Notification.DEFAULT_VIBRATE;
        notificationManager.notify(0, notification); 

Answer 1

您可以创建一个新的 Activity 和主题作为 Dialog 并检查前台 Activity 。检查以下代码。

         ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        List<RunningTaskInfo> services = activityManager
                .getRunningTasks(Integer.MAX_VALUE);
        boolean isActivityFound = false;

        if (services.get(0).topActivity.getPackageName().toString()
                .equalsIgnoreCase(context.getPackageName().toString())) {
            isActivityFound = true;
        }

       if (isActivityFound) {
            resultIntent = new Intent(context, AlertDialogNotification.class);
            resultIntent.putExtra(EXTRA_ALERT_MESSAGE_BEAUTIFUL, "anyMessage");
            resultIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(resultIntent); 
        }

在 list 中将主题设置为 Activity 的对话框。希望能帮助到你。让我们知道您是否有问题。