public void setDrawFullUnderline(boolean drawFull) {
    mDrawFullUnderline = drawFull;
    mDrawFullUnderlineSet = true;
    invalidate();
  }
Set whether this tab strip should draw a full-width underline in the
current tab indicator color.

@param drawFull true to draw a full-width underline, false otherwise
sample/src/main/java/android/support/v4/view/PagerTabStripV22.java