将通知固定到通知区域的顶部 [英] Pin Notification to top of notification area

问题描述

我有一个每三秒刷新(即发送)一次的通知.我已经设置了 FLAG_ONGOING_EVENT 标志和 FLAG_NO_CLEAR 标志，以便始终显示.问题是，如果例如下载处于活动状态(在通知区域显示进度条)两个通知不断切换位置，因为它们都每隔几秒钟刷新一次.

I have a Notification which is refreshed (i.e. sent) every three seconds. I've set the FLAG_ONGOING_EVENT flag and the FLAG_NO_CLEAR flag so that is always shown. The problem is, that if e.g. a download is active (which displays a progress bar in the notification area) both notifications constantly switch positions as they are both refreshed every few seconds.

如何将我的通知固定到列表的顶部(或某个静态位置)，以便在我每次通过调用 NotificationManager.notify() 更新它时停止跳动?

How can I pin my notification to the top of the list (or to some static position), so that it stops jumping around every time I update it by calling NotificationManager.notify()?

编辑:这是更新通知的代码.每三秒运行一次.

Here's the code to update the notification. It's run every three seconds.

Notification notification = new Notification();
notification.contentView = appBarNotification; // this sets the changed notification content
notification.flags |= Notification.FLAG_ONGOING_EVENT;  
notification.flags |= Notification.FLAG_NO_CLEAR; 

Intent notificationIntent = new Intent();
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
notification.contentIntent = contentIntent;
notification.icon = R.drawable.icon;

nm.notify(APP_BAR_NOTIFICATION, notification);

推荐答案

有一个解决方案可以满足您的需求.

There is a solution that does exactly what you want.

在Notification 类中，有一个名为何时.根据 API:

In the Notification class, there is a public field called when. According to the API:

通知的时间戳.图标和展开的视图按此键排序.

The timestamp for the notification. The icons and expanded views are sorted by this key.

默认行为(对于代码和编码人员来说:)是给 when 通知的时间戳:

The default behaviour (for code and coders alike :) is to give when the timestamp of the notification:

notification.when = System.currentTimeMillis();

所以 - 为了保持通知的正确顺序，您需要做的就是给它一个预设的时间戳:

So - in order to maintain the correct order of notifications, all you need to do is give it a preset timestamp instead:

notification.when = previousTimestamp;

当您对所有通知执行此操作时，它们会保持顺序.我遇到了和你一样的问题，就是这样解决的.

When you do this with all of your notifications, they maintain their order. I had the same problem as you and solved it this way.

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