public void setDisplayTextAppearance(int resId) {
        applyTextAppearance(getContext(), resId, displayViews);
    }
Sets the text appearance for the entered duration (the large numbers in the upper area).

@param resId resource id of the style describing the text appearance.
android/third_party/time-duration-picker/src/main/java/mobi/upod/timedurationpicker/TimeDurationPicker.java