private void applyTextAppearance(Context context, TypedArray attrs, int attributeIndex, final TextView[] targetViews) {
        final int id = attrs.getResourceId(attributeIndex, 0);
        if (id != 0) {
            applyTextAppearance(context, id, targetViews);
        }
    }
Sets the padding to be used for the number pad buttons.

@param padding padding in pixels
android/third_party/time-duration-picker/src/main/java/mobi/upod/timedurationpicker/TimeDurationPicker.java