@Override
public void computeScroll() {
boolean invalidate = mDragHelper.continueSettling(true);
if (!mTouchDown && mScroller.computeScrollOffset()) {
if (!invalidate) {
offsetHeaderBy(mScroller.getCurrY() - getHeaderTop());
}
invalidate = true;
}
updateViewOffset();
if (invalidate) {
ViewCompat.postInvalidateOnAnimation(this);
}
}
