code: private static void clearSharedPreferences(Context context) {
          SharedPreferences pref = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);
          Editor editor = pref.edit();
          editor.remove(KEY_INSTALL_DATE);
          editor.remove(KEY_LAUNCH_TIMES);
          editor.apply();
      }
docs: Clear data in shared preferences.<br>
  This API is called when the "Later" is pressed or canceled.
  @param context