是否可以检查通知是否可见或已取消?

本文介绍了是否可以检查通知是否可见或已取消?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想更新通知数据，但我找到的唯一方法是启动一个具有相同 ID 的新通知.

I would like to update notification data, but the only way I found is to launch a new one with the same Id.

问题是如果原来的被取消了，我不想再提出一个新的.有没有办法判断通知是否可见或已取消?或者只有在通知存在时才更新通知的方法?

The problem is that I don't want to raise a new one if the original has beed canceled. Is there a way to tell if a notification is visible or canceled? Or a way to update a notification only if it exists?

推荐答案

我是这样解决的:

private boolean isNotificationVisible() { Intent notificationIntent = new Intent(context, MainActivity.class); PendingIntent test = PendingIntent.getActivity(context, MY_ID, notificationIntent, PendingIntent.FLAG_NO_CREATE); return test != null; }

这是我生成通知的方式:

This is how I generate the notification:

/** * Issues a notification to inform the user that server has sent a message. */ private void generateNotification(String text) { int icon = R.drawable.notifiaction_icon; long when = System.currentTimeMillis(); NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); Notification notification = new Notification(icon, text, when); String title = context.getString(R.string.app_name); Intent notificationIntent = new Intent(context, MainActivity.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, MY_ID, notificationIntent, 0); notification.setLatestEventInfo(context, title, text, intent); notification.flags |= Notification.FLAG_AUTO_CANCEL; //PendingIntent.FLAG_ONE_SHOT notificationManager.notify(MY_ID, notification); }