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I am just making some AppWidget and I want to pass some Strings through UpdateView to an Activity. But the Bundle is null. I try this: -Widget.java                       Intent defineIntent = new Intent(context, Visor.class);                        defineIntent.putExtra ("org.rss.androides.post2","artist");                        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, defineIntent, 0);                        updateViews.setOnClickPendingIntent (R.id.widget, pendingIntent); -Viewer.java           Bundle b = intent.getExtras();                 if (b == null) {                     finish();                     return;                 } b is always null.

Remember that PendingIntents aren't keyed using extras: http://groups.google.com/group/android-developers/msg/b296f43ae70c4587 You could hack the extras through by mangling them into Uri parameters, or if you're using a ContentProvider, just point to a specific row.

Or use PendingIntent.FLAG_UPDATE_CURRENT; just be careful that each active instance has its own unique Intent.

Then i've tried PendingIntent.FLAG_UPDATE_CURRENT i'm no longer crashing, but it always launches the activity with extras were put in the widget that was updated the last. It looks like pending intent is shared among my widget instances

I've changed the call to  PendingIntent pending = PendingIntent.getActivity(context, appWidgetId, intent, PendingIntent.FLAG_UPDATE_CURRENT); Now everything is cool except based on discussions i'm not sure how reliable it'll be . ( Doc says it's not supported yet )

I am just getting started with Android development and I have created a nice little widget that displays some info on my home screen. However, I now want to implement a Button on my widget that updates the info in my widget TextView.

Solved - I can confirm that an Activity is NOT needed if you want create a Button to update an Android AppWidget. I have been able to implement my AppWidgetProvider class such that it registers an android.appwidget.action.APPWIDGET_UPDATE intent-filter with the Broadcast receiver in the AndroidManifest.xml, which then fires the onUpdate event in the AppWidgetProvider class (which in turn then runs the UpdateService).

The UpdateService in my AppWidgetProvider class then uses onHandleIntent to run a private buildUpdate method - which registers the onClick event with a call to setOnClickPendingIntent as follows: