code: public void setDrawerIndicatorEnabled(boolean enable) {
          if (enable != mDrawerIndicatorEnabled) {
              if (enable) {
                  setActionBarUpIndicator((Drawable) mSlider,
                          mDrawerLayout.isDrawerOpen(GravityCompat.START) ?
                                  mCloseDrawerContentDescRes : mOpenDrawerContentDescRes);
                  ((DrawerArrowDrawableToggle) mSlider).setSmoothPosition(0f);
              } else {
                  if (mHomeAsUpIndicator != null) {
                      setActionBarUpIndicator(mHomeAsUpIndicator, 0);
                  } else {
                      setActionBarUpIndicator((Drawable) mSlider, 0);
                      ((DrawerArrowDrawableToggle) mSlider).setSmoothPosition(1f);
                  }
              }
              mDrawerIndicatorEnabled = enable;
          }
      }
docs: Enable or disable the drawer indicator. The indicator defaults to enabled.
  <p/>
  <p>When the indicator is disabled, the <code>ActionBar</code> will revert to displaying
  the home-as-up indicator provided by the <code>Activity</code>'s theme in the
  <code>android.R.attr.homeAsUpIndicator</code> attribute instead of the animated
  drawer glyph.</p>
  
  @param enable true to enable, false to disable