@Override public void setPadding(int left, int top, int right, int bottom) {
    if (bottom < mMinPaddingBottom) {
      bottom = mMinPaddingBottom;
    }
    super.setPadding(left, top, right, bottom);
  }
@return The current tab indicator color as an 0xRRGGBB value.
sample/src/main/java/android/support/v4/view/PagerTabStripV22.java