CODEWITHSUNDEEP
androidandroid-widget
Erenwoid
Erenwoid

Reputation: 993

Update a widget from a service

I'm trying to update a widget from a service... the service start a thread that execute this code

AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(Worker.this);
RemoteViews remoteViews = new RemoteViews(Worker.this.getPackageName(), R.layout.mywidget);
ComponentName projectWidget = new ComponentName(Worker.this, MyWidget.class);
remoteViews.setTextViewText(R.id.widgetstate, "update");
appWidgetManager.updateAppWidget(projectWidget, remoteViews);

the onUpdate method just print a log, but this log is printed only when I create the widget, not everytime the thread cycles... where I'm wrong?

Thanks in advance

Upvotes: 0

Views: 434

Answers (1)

user658042
user658042

Reputation:

You're not wrong. You just update the widget without calling onUpdate(). It's just a convinience method that gets called in response to the ACTION_APPWIDGET_UPDATE broadcast by the system. You don't have to call it to update a widget, it also just works like you did here. ¹

To invoke it you can send the broadcast or call it by hand though, it's a good idea to keep the widget update functionality in one place from a code structure point of view to find things easily.

¹ Take a look at the AppWidgetProvider source, line 56. The whole AppWidgetProvider is just a BroadcastReceiver that does some work for you already - and it does start the update in the same way.

Upvotes: 2

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