在活动AppWidgetManager.getAppWidgetIds返回一个空列表 [英] AppWidgetManager.getAppWidgetIds in activity returns an empty list

问题描述

我有我试图从活动更新appwidget。

I have an appwidget that I'm trying to update from an activity.

要做到这一点，我需要的appwidget ID。

To do that, I need the appwidget id.

我用 AppWidgetManager.getAppWidgetIds ，但它总是返回一个空列表。

I've used AppWidgetManager.getAppWidgetIds but it always returns an empty list.

我还用 AppWidgetManager.getInstalledProviders 来确保我的组件名是正确的，但我仍然得到一个空列表中。

I also used AppWidgetManager.getInstalledProviders to make sure that my ComponentName is correct, but still I get an empty list.

我已经看到了所有关于这个的其他问题，但我无法找到的东西，为我工作。

I've seen all the other questions about this, but I couldn't find something that worked for me.

有另一种方式来解决这个问题？或者另一种方式来更新窗口小部件？

Is there another way to solve this? or another way to update the widget?

我的code：

ComponentName name = new ComponentName(packageName, boardcastReceiverClass);
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(this);
int[] ids = appWidgetManager.getAppWidgetIds(name);
if (ids != null && ids.length > 0) {
   getApplicationContext().sendBroadcast(getUpdateIntent(ids[0]));
}

感谢。

更新：我要指出，我AppWidgetProvider在库项目。根据我与 getInstalledProviders 的组件名，我用我的应用程序的包名和库的包名的类名。

UPDATE: I should mention that my AppWidgetProvider is in a library project. According to the ComponentName I get with getInstalledProviders, I used the package name of my app and the class name with the package name of the library.

推荐答案

您可以访问你的widget不知道ID

You can access your widget without knowing id

appWidgetManager.updateAppWidget(new ComponentName(this.getPackageName(),Widget.class.getName()), views);

这允许您访问的小部件，而无需知道appWidgetID。然后，在活动：

This let you access the widget without having to know the 'appWidgetID'. Then in activity:

Intent intent = new Intent(this, Settings.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);

views.setOnClickPendingIntent(R.id.btnActivate, pendingIntent);

AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(this);
appWidgetManager.updateAppWidget(new ComponentName(this.getPackageName(), Widget.class.getName()), views);
finish();

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