Launch android app from Notification or the widget similar to the launch from app icon

 private static PendingIntent getLaunchIntent(Context context) {

    Intent target = new Intent(Intent.ACTION_MAIN);    target.addCategory(Intent.CATEGORY_LAUNCHER);    target.setComponent(new ComponentName(context.getPackageName(),

                        <YourRootActivityName>.class.getName()));    PendingIntent intent = PendingIntent.getActivity(context, 0,target, 0);    return intent;

 }