CODEWITHSUNDEEP
javaandroidandroid-widgetwidget
user1460819
user1460819

Reputation: 2112

runOnUiThread method analog for widget?

I have a widget which needs to do some operations in another thread. It has a method which processes some data and shows the result in a TextView on the widget.
To implement this, I need to call my method in a separate thread. Then I need to include some code to the end of that method to show the results on the widget (something like textView1.setText("my results");.
This has to be done in a UI thread. I want to use the method runOnUiThread. But it exists only for an activity. Is there an analog of this method for widget class? What can I do to use that method in my widget?

Here is my code:

public class MyWidgetProvider extends AppWidgetProvider {

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
            int[] appWidgetIds) 
{
//...
//here I need to launch a method toBeLaunchedInASeparateThread in a separate thread
}

public void toBeLaunchedInASeparateThread()
{
 // ... many operations
 int result = 0;

//here I need to launch the following line in the UI thread to follow Android guidelines
 setTextToTextView(context, "My result is " + result);
}

public static void setTextToTextView(Context context, String text)
    {
        RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_sample);
        views.setTextViewText(R.id.widgetTextViewCard, text);
        ComponentName myWidget = new ComponentName(context, MyWidgetProvider.class);
        AppWidgetManager manager = AppWidgetManager.getInstance(context);
        manager.updateAppWidget(manager.getAppWidgetIds(myWidget), views);      
    }

}

Upvotes: 1

Views: 1153

Answers (2)

Sipka
Sipka

Reputation: 2311

blackbelt's answer is great, however you can also use textView1.post(runnable) and methods like that. This way you don't have to create a Handler instance, and the code will run on UI thread. AFAIK both solution will do the exactly same things.

For RemoteViews:

Handler mHandler = new Handler();//this must be ran on the UI thread.
....
mHandler.post(new Runnable(){
    public void run() {
        toBeLaunchedInASeparateThread();
    }
});

Upvotes: 1

Blackbelt
Blackbelt

Reputation: 157437

you can use an Handler, to connect with the UI Thread and post on its queue. Handler.post(Runnable). Here the documentation

Upvotes: 2

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