public void flingHeader(float velocity) {
if (mTouchDown) {
mScroller.abortAnimation();
return;
}
mScroller.fling(
0,
getHeaderTop(),
0,
(int) velocity,
0,
0,
mContainer.getHeaderTopMinimum(),
mContainer.getHeaderTopMaximum());
ViewCompat.postInvalidateOnAnimation(this);
}
private void offsetHeaderBy(int dy) {
final int prevTop = mContainer.getTop();
final int clampedDy =
MathUtils.clamp(prevTop + dy, getHeaderTopMinimum(), getHeaderTopMaximum()) - prevTop;
mContainer.offsetTopAndBottom(clampedDy);
}
private int getScrollRange() {
return mContainer.getScrollRange();
}
public int getHeaderTopMinimum() {
return mContainer.getHeaderTopMinimum();
}
public int getHeaderTop() {
return mContainer.getTop();
}
public View getHeader() {
return mContainer.getHeader();
}
public View getContent() {
return mContainer.getContent();
}