AppWidgetProvider variable problem

public class MainWidget extends AppWidgetProvider {

    public static final String ACTION_WIDGET_UPDATE_FROM_WIDGET = "ACTION_WIDGET_UPDATE_FROM_WIDGET";

    private int myNum = 0;

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager,
            int[] appWidgetIds) {
        // TODO Auto-generated method stub
        super.onUpdate(context, appWidgetManager, appWidgetIds);

        // set the action to broadcast when user clicks button
        Intent intent = new Intent(context, MainWidget.class);
        intent.setAction(ACTION_WIDGET_UPDATE_FROM_WIDGET);

        PendingIntent actionPendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);

        RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widgetlayout);
        remoteViews.setOnClickPendingIntent(R.id.button1, actionPendingIntent);

        // update the widget with the above settings
        ComponentName thisWidget = new ComponentName(context, MainWidget.class);
        AppWidgetManager manager = AppWidgetManager.getInstance(context);
        manager.updateAppWidget(thisWidget, remoteViews);

    }

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        super.onReceive(context, intent);

        if (intent.getAction().equals(ACTION_WIDGET_UPDATE_FROM_WIDGET)) {
            myNum += 1;
            Toast.makeText(context, "myNum:" + myNum, Toast.LENGTH_LONG).show();
        }
    }
}