code: public void setThemeType(ThemeType themeType) {
          if (themeType == ThemeType.ACTIVITY) {
              setTheme(android.R.style.Theme_Holo_Light);
          } else if (themeType == ThemeType.DIALOG) {
              setTheme(android.R.style.Theme_Holo_Light_Dialog);
          } else if (themeType == ThemeType.DIALOG_NO_ACTION_BAR) {
              setTheme(android.R.style.Theme_Holo_Light_Dialog_NoActionBar);
          }
      }
docs: Sets the theme for this activity
  
  @param themeType the {@code ThemeType} enum set in the calling intent.