WidgetOnClickHelp

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
    RemoteViews view = new RemoteViews(context.getPackageName(), R.layout.widget); // A widget.xml-ben van a layout
    Intent intent = new Intent(context, Main.class); // A fő osztályt akrjuk elindítani
    PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);

    view.setOnClickPendingIntent(R.id.widget_layout, pendingIntent); // widget_layout a layout ID-ja
}