Mise à jour d'un appWidget

J'ai trouvé un exemple de widget qui se met à jour à un intervalle de temps paramétrable.

je ferai un tuto complet, mais en attendant, la méthode se trouve dans le onReceive :
Code:
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// Fix SDK 1.5 Bug per note here:
// http://developer.android.com/guide/topics/appwidgets/index.html#AppWidgetProvider
// linking to this post:
// http://groups.google.com/group/android-developers/msg/e405ca19df2170e2
@Override
public void onReceive(Context context, Intent intent) {
 
    final String action = intent.getAction();
 
    if (AppWidgetManager.ACTION_APPWIDGET_DELETED.equals(action)) 
    {
        final int appWidgetId = intent.getExtras().getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
 
        if (appWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID) {
            this.onDeleted(context, new int[] { appWidgetId });
      }
    } else if (AppWidgetManager.ACTION_APPWIDGET_UPDATE.equals(action)) {
 
        if (!URI_SCHEME.equals(intent.getScheme())) {
            // if the scheme doesn't match, that means it wasn't from the
            // alarm
            // either it's the first time in (even before the configuration
            // is done) or after a reboot or update
 
            final int[] appWidgetIds = intent.getExtras().getIntArray(AppWidgetManager.EXTRA_APPWIDGET_IDS);
 
            for (int appWidgetId : appWidgetIds) {
 
                // get the user settings for how long to schedule the update
                // time for
                SharedPreferences config = context.getSharedPreferences(ImagesWidgetConfiguration.PREFS_NAME, 0);
                int updateRateSeconds = config.getInt(String.format(ImagesWidgetConfiguration.PREFS_UPDATE_RATE_FIELD_PATTERN, appWidgetId), -1);
 
                if (updateRateSeconds != -1) 
                  {
                    Log.i(LOG_TAG, "Starting recurring alarm for id " + appWidgetId);
 
                    Intent widgetUpdate = new Intent();
                    widgetUpdate.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
                    widgetUpdate.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] { appWidgetId });
 
                    // make this pending intent unique by adding a scheme to
                    // it
                    widgetUpdate.setData(Uri.withAppendedPath(Uri.parse(ImagesWidgetProvider.URI_SCHEME + "://widget/id/"), String.valueOf(appWidgetId)));
                    PendingIntent newPending = PendingIntent.getBroadcast(context, 0, widgetUpdate, PendingIntent.FLAG_UPDATE_CURRENT);
 
                    // schedule the updating
                    AlarmManager alarms = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
                    alarms.setRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime(), updateRateSeconds * 1000, newPending);
                }
            }
        }
        super.onReceive(context, intent);
    } else {
        super.onReceive(context, intent);
    }
}
NB : voir la FAQ pour le code complet