private void applyIcon(TypedArray attrs, int attributeIndex, ImageView targetView) {
        final Drawable icon = attrs.getDrawable(attributeIndex);
        if (icon != null) {
            targetView.setImageDrawable(icon);
        }
    }
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