@Override
public void onPageScrollStateChanged(int state) {
if (state == ViewPager.SCROLL_STATE_IDLE) {
mScrolling = false;
TextView tv = getTabView(mSelectedPosition);
if (tv != null) updateIndicator(tv.getLeft(), tv.getMeasuredWidth());
} else mScrolling = true;
if (mListener != null) mListener.onPageScrollStateChanged(state);
}
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
if (mListener != null) mListener.onPageScrolled(position, positionOffset, positionOffsetPixels);
CheckedTextView tv_scroll = getTabView(position);
CheckedTextView tv_next = getTabView(position + 1);
if (tv_scroll != null && tv_next != null) {
int width_scroll = tv_scroll.getWidth();
int width_next = tv_next.getWidth();
float distance = (width_scroll + width_next) / 2f;
int width = (int) (width_scroll + (width_next - width_scroll) * positionOffset + 0.5f);
int offset =
(int)
(tv_scroll.getLeft()
+ width_scroll / 2f
+ distance * positionOffset
- width / 2f
+ 0.5f);
updateIndicator(offset, width);
}
}