TextView not getting updated in android app widgets

Question

I am using asynctask to do my feature function and getting the values there. But my text view is not getting updated, though my log statements giving me the result.

I am not using custom intent here, just the basic one.

Here are my code snippets:

    public class ListViewWidget extends AppWidgetProvider{

     public void onUpdate(Context context, AppWidgetManager appWidgetManager,
                int[] appWidgetIds) {

        super.onUpdate(context, appWidgetManager, appWidgetIds);
        updateViews = new RemoteViews(context.getPackageName(), R.layout.list_layout);             
        thisWidget = new ComponentName(context, ListViewWidget.class);
        FetchTask fetchTask=new FetchTask();
        AppWidgetManager.getInstance(context.getApplicationContext());
        fetchTask.execute();

        }

//FetchTask

    public static class FetchTask extends AsyncTask<URL,Integer,String> implements ServerRequestEnvironment{

    protected String doInBackground(URL... arg0) {
    //logic part and stuff not entered

    //This is the end part that returns me the result, which is not getting printed to text view.

          String name="";
          int i = new Random().nextInt(27);
          storeObject=store.getStores().getItems().get(i).getStore();

          name= storeObject.getName();
          resultStuff(name);
          Log.i("StoreTag","storeval:"+name);   //returns name of the 0th item      

                return name;
    }//end of doInBackground() method

    protected void onPostExecute(String name) {
                // TODO Auto-generated method stub
          Intent intent=new Intent("android.appwidget.action.APPWIDGET_UPDATE");

          PendingIntent pendingIntent=PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
          updateViews.setTextViewText(R.id.text_view,resultStuff(name));
          updateViews.setOnClickPendingIntent(R.id.next, pendingIntent);

          AppWidgetManager manager = AppWidgetManager.getInstance(context.getApplicationContext());

          manager.updateAppWidget(thisWidget, updateViews);
    }//end of PostExecute

    }//End of async task class
    }//end of ListViewWidget class

What I am missing here? Please please guide..

UPDATE: Is this fine? Async task to be called both in onReceive and onUpdate??

@Override public void onReceive(Context context,Intent intent){

    if(intent.getAction().equals("android.appwidget.action.APPWIDGET_UPDATE")){
        fetchTask.execute();
    }
}

Update 2:

 public static String name="New text"

public void onUpdate(Context context, AppWidgetManager appWidgetManager,
            int[] appWidgetIds) {

        super.onUpdate(context, appWidgetManager, appWidgetIds);
        updateViews = new RemoteViews(context.getPackageName(), R.layout.list_layout);

//-----------NEW LINE ADDED-------------
            updateViews.setTextViewText(R.id.text_view,name);
        thisWidget = new ComponentName(context, ListViewWidget.class);

        //Now in onPostExecute()
        //AppWidgetManager manager = AppWidgetManager.getInstance(context.getApplicationContext());
        //manager.updateAppWidget(thisWidget, updateViews);

        fetchTask.execute();

    }
protected void onPostExecute(String name) {
            // TODO Auto-generated method stub
            Intent intent=new Intent("android.appwidget.action.APPWIDGET_UPDATE");

            PendingIntent pendingIntent=PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
            updateViews.setTextViewText(R.id.text_view,name);
            updateViews.setOnClickPendingIntent(R.id.next, pendingIntent);

            AppWidgetManager manager = AppWidgetManager.getInstance(context.getApplicationContext());
            manager.updateAppWidget(thisWidget, updateViews);
        }

@Dororo Didn't get you. Please explain. I have created public var in my class:

public static Context context;
        public static RemoteViews updateViews;
        public static ComponentName thisWidget;
        FetchTask fetchTask=new FetchTask();

Is the intent received? Can you post the code of the receiving end? — Saren Inden, Jun 19 '13 at 21:01
I haven't written onReceive() method as I am not getting what to call there out of these methods above. DO onReceive() needs to called for every intent even for this android.appwidget.action.APPWIDGET_UPDATE? — Atihska, Jun 19 '13 at 21:03

score 0 · Answer 1 · answered Jun 19 '13 at 21:02

0

Have you tried using this:

TextView textView = (TextView) findViewById(R.id.textView);
textView.setText(toThis);

answered Jun 19 '13 at 21:02

KingsInnerSoul

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I am using android app widget. It does not use findViewById. It has REmote Views and its set of calls. – Atihska Jun 19 '13 at 21:06

Dororo · Answer 2 · 2013-06-19T21:37:40.413

0

Are you sure you're not overwriting the updated value when you create new ComponentName(context, ListViewWidget.class);? onUpdate will be called when you call manager.updateAppWidget(thisWidget, updateViews); You shouldn't need to use static, you just need an initialisation boolean which is set to true after you've created the objects for the first time.

edited Jun 19 '13 at 21:37

answered Jun 19 '13 at 21:09

Dororo

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resultStuff(name) is getting the value in my debug mode. So do I need to use onReceive. I am setting Intent's Action in onPostExecute(). And textView.invalidate(), should I put before setting my textView ?? – Atihska Jun 19 '13 at 21:14
Are you sure you aren't getting into a loop? Shouldn't `android.appwidget.action.APPWIDGET_UPDATE` call `onUpdate()` which will reset your view (because you create a `new` one)? – Dororo Jun 19 '13 at 21:19
Didn't get you. Please explain. I have created public var in my class for RemoteViews object and ComponentName. – Atihska Jun 19 '13 at 21:31
After updating your text view in `onPostExecute(String name)`, you need to update the app widget by calling the code in the answer. – Dororo Jun 19 '13 at 21:34
I am updating in my onPostExecute..check above..Overwriting how? – Atihska Jun 19 '13 at 21:39
Yes but surely what you are doing is `onUpdate` -> `FetchTask.doInBackground` -> `FetchTask.onPostExecute` -> UPDATE -> `updateAppWidget` -> `onUpdate` -> remaking the view (so it will be set to the default value) – Dororo Jun 19 '13 at 21:42
In `onUpdate`, set the text view to be the value of a public var called `name` (set it to "unknown" or something initially). When you update in `onPostExecute` just set the `name` var and call `updateAppWidget` – Dororo Jun 19 '13 at 21:46
I did what you told but not getting updated..Even the name value that's default in .java class not printed but the one in the layout file. – Atihska Jun 19 '13 at 22:08
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/32043/discussion-between-atihska-and-dororo) – Atihska Jun 19 '13 at 22:27

score 0 · Accepted Answer · answered Jun 20 '13 at 00:07

0

Solved my exception and error. Was setting context to be null. I assigned context with the application context.

answered Jun 20 '13 at 00:07

Atihska

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TextView not getting updated in android app widgets

3 Answers3