@Override
public void run() {
/**
* Only set mStartTime if this is the first time we're starting, else actually calculate the Y
* delta
*/
if (mStartTime == -1) {
mStartTime = System.currentTimeMillis();
} else {
/**
* We do do all calculations in long to reduce software float calculations. We use 1000 as
* it gives us good accuracy and small rounding errors
*/
long normalizedTime = (1000 * (System.currentTimeMillis() - mStartTime)) / mDuration;
normalizedTime = Math.max(Math.min(normalizedTime, 1000), 0);
final int deltaY =
Math.round(
(mScrollFromY - mScrollToY)
* mInterpolator.getInterpolation(normalizedTime / 1000f));
mCurrentY = mScrollFromY - deltaY;
setHeaderScroll(mCurrentY);
}
// If we're not at the target Y, keep going...
if (mContinueRunning && mScrollToY != mCurrentY) {
ViewCompat.postOnAnimation(PullToRefreshBase.this, this);
} else {
if (null != mListener) {
mListener.onSmoothScrollFinished();
}
}
}
