安卓appwidget不会从活动更新 [英] android appwidget won't update from activity

问题描述

我有一个简单appwidget，我要当一个动作发生在一个活动（在相同的应用程序）来更新它。中的OnUpdate（），我立刻更新小部件，它工作正常。在我的活动，我呼吁我的appwidget相同的静态更新方法被调用的OnUpdate（）来更新视图。窗口小部件不更新

I have a simple appwidget and I want to update it when an action occurs in an activity (in the same app). in onUpdate(), I immediately update the widget, which works fine. In my activity, I call the same static update method in my appwidget that is called in onUpdate() to update the views. the widget is not updated.

我可以跟踪code右进AppWidgetManager.updateAppWidget（）方法，而这一切的好，但小部件不更新。

I can trace the code right into the AppWidgetManager.updateAppWidget() method, and all this good, but the widget does not update.

唯一可能的区别，我可以看到的是，传递到我的静态更新方法的上下文对象是不同的，当它从一个活动与一个appwidget的的OnUpdate（）方法的上下文的情况下调用。不过，所以我希望它应该有很多的例子这在网络上。

The only possible difference I can see is that the context object passed into my static update method is different, when it's called from the context of an activity vs. the context of a appwidget's onUpdate() method. however, there are lots of examples on the web of this so I expect it should work.

推荐答案

没有看到你的code我不是100％肯定你是如何试图做到这一点，但这里是我使用的方法。在我的活动我有以下方法：

Without seeing your code I'm not 100% sure how you are trying to do it, however here is the method I use. Within my Activity I have the following method:

private void updateAllWidgets(){
    AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(getApplicationContext());
    int[] appWidgetIds = appWidgetManager.getAppWidgetIds(new ComponentName(this, MyWidget.class));
    if (appWidgetIds.length > 0) {
        new MyWidget().onUpdate(this, appWidgetManager, appWidgetIds);
    }
}

其中，进myWidget 是类appwidget的。我可以从我的活动的任何地方调用此方法来更新我的所有appwidgets。

Where MyWidget is the class of the appwidget. I can call this method from anywhere within my Activity to update all my appwidgets.

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