当应用程序处于前台时需要关闭点击通知 - android

Question

我正在用我的应用测试推送通知。

当App在前台时：

Step 1. Received the notification (in system tray). 
     2. now, I'm in some other screen than the home screen.
     3. Actual Problem: On tap on the notification, it is going to the home screen.
     4. Expected: If the app is in the foreground, just I need to cancel on tap of the notification. (No need to swipe.)

当应用程序在后台/被杀死时：（运行良好）

Step 1. Received the notification (in the system tray)
     2. On tap, open the home screen of the app.

尝试在意图中设置启动模式标志。没有帮助。下面是我的代码。请各位大侠提出解决方案。

    Intent resultIntent = new Intent(this, MainActivity.class);
    //resultIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    // resultIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK);

    PendingIntent resultPendingIntent =
            PendingIntent.getActivity(
                    this,
                    0,
                    resultIntent,
                    PendingIntent.FLAG_UPDATE_CURRENT
            );


    NotificationCompat.Builder mBuilder =
            new NotificationCompat.Builder(this);

    mBuilder.setContentIntent(resultPendingIntent);
    mBuilder.setSmallIcon(R.mipmap.ic_launcher);
    mBuilder.setContentTitle(title);
    mBuilder.setContentText(body);
    mBuilder.setAutoCancel(true);
    mBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(body));
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        mBuilder.setChannelId(TestUtils.creatChanel(this).getId());
    }

    NotificationManager mNotificationManager =
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    mNotificationManager.notify(642, mBuilder.build());

Answer 1

不确定点击时关闭通知，但因为您担心导航错误。

我们可以检查应用是否在前台，如果应用在前台，我们可以防止点击通知打开新的活动。

//If app is in foreground setting pending intent to null
PendingIntent pendingIntent;
        Intent notificationIntent = new Intent(getApplicationContext(), Main2Activity.class);

        if(isAppInForeground()){
            Log.e("--^","inForeground");
            pendingIntent = null;
        }else{
            Log.e("--^","inBackground");
            notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        }

添加此功能（来源：link）

private boolean isAppInForeground() {
        ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
        List<ActivityManager.RunningAppProcessInfo> services = activityManager.getRunningAppProcesses();
        boolean isActivityFound = false;

        if (services.get(0).processName
                .equalsIgnoreCase(getPackageName()) && services.get(0).importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
            isActivityFound = true;
        }

        return isActivityFound;
    }

在这种情况下，如果应用程序在前台时收到通知，则单击它不会执行任何操作。所以用户只有一个选项可以滑动删除。

Answer 2

您可以使用关闭按钮创建自定义通知以使用 RemoteViews 关闭通知

// 使用 RemoteViews 创建通知：

RemoteViews remoteViews= new RemoteViews(getApplicationContext().getPackageName(), R.layout.your_custom_notification);
Intent closeIntent = new Intent(context, CloseNotificationService.class);
hangUpIntent.setAction("close");

PendingIntent pendingCloseIntent = PendingIntent.getBroadcast(this, 0, closeNotification, PendingIntent.FLAG_UPDATE_CURRENT);

remoteViews.setOnClickPendingIntent(R.id.cancel_notification, pendingCloseIntent);

// create notification here..
Notification customNotification = new NotificationCompat.Builder(context, CHANNEL_ID)
    .setSmallIcon(R.drawable.notification_icon)
    .setStyle(new NotificationCompat.DecoratedCustomViewStyle())
    .setCustomContentView(remoteViews)
    .build();

关闭按钮的 OnClick 将重定向到服务类：

public class CloseNotificationService extends IntentService {

        /**
         * Creates an IntentService.  Invoked by your subclass's constructor.
         */
        public CloseNotificationService() {
            super("notificationIntentService");
        }

        @Override
        protected void onHandleIntent(@Nullable Intent intent) {
            switch (intent.getAction()) {

                case "close":
                    Handler hangUpHandler = new Handler(Looper.getMainLooper());
                    hangUpHandler.post(new Runnable() {
                        @Override
                        public void run() {
                            NotificationManager notifManager = 
                                    (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
                            notifManager.cancel(notificationId); // get notification id from intent.
                        }
                    });
                    break;
            }
        }
    }

RemoteViews的更多信息可以参考谷歌官方开发者网站https://developer.android.com/training/notify-user/custom-notification

Answer 3

而不是这个：

Intent resultIntent = new Intent(this, MainActivity.class);

这样做：

Intent resultIntent = getPackageManager().getLaunchIntentForPackage("your.package.name");

并将其放入您的Notification。如果应用程序尚未运行，这将启动应用程序，否则它只会将应用程序的任务以用户上次使用它时的任何状态带到前台。如果用户已经在应用程序中（即：在另一个屏幕上），当用户单击Notification 时，这将不会执行任何操作。

应该正是您正在寻找的。​​p>

Answer 4

在您的启动器活动中，您是否尝试过通知管理器类 cancelAll() 方法？？ 这样，如果启动时已经有通知，则会自动取消