如何从服务更新小部件?

How to update widgets from a service?(如何从服务更新小部件?)

问题描述

我有一个后台服务，可以配置为每 x 分钟执行一次操作.我想实现一个小部件，每次我的服务执行该操作时都会更新.但是，我无法以任何方式调用 AppWidgetProvider 的 onUpdate 方法，除非将小部件添加到主屏幕.

I have a background service that can be configured to perform some action every x minutes. I want to implement a widget that gets updated every time my service performs that action. However, I can't get the onUpdate method of my AppWidgetProvider called in any way, except when adding a widget to the homescreen.

我尝试发送 APPWIDGET_UPDATE 意图，但 onUpdate 没有被调用，尽管 AppWidgetProvider 确实收到了意图，因为调用了 onReceive 方法.有什么方法可以从服务触发小部件更新?

I tried sending APPWIDGET_UPDATE intents but onUpdate did not get called although the AppWidgetProvider did receive the intent since the onReceive method was called. Is there any way I can trigger widget updates from a service?

推荐答案

只需让自己成为一个 RemoteViews 并直接在 Service 中更新小部件.您将通过以下方式获得 AppWidgetManager:

Just make yourself a RemoteViews and update the widget(s) directly in the Service. You'll get your AppWidgetManager via:

AppWidgetManager mgr=AppWidgetManager.getInstance(this);

其他一切正常.

注意:-如果您真的想强制现有的 AppWidgetProvider 完成工作，请向您的组件发送带有自定义操作的广播，然后调用 onUpdate() 自己从 onReceive() 获取时.

Note:- If you really want to force the existing AppWidgetProvider to do the work, send a broadcast with a custom action to your component, and call onUpdate() yourself from onReceive() when you get it.

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