private void clearMotionHistory() {
        if (mInitialMotionX == null) {
            return;
        }
        Arrays.fill(mInitialMotionX, 0);
        Arrays.fill(mInitialMotionY, 0);
        Arrays.fill(mLastMotionX, 0);
        Arrays.fill(mLastMotionY, 0);
        Arrays.fill(mInitialEdgesTouched, 0);
        Arrays.fill(mEdgeDragsInProgress, 0);
        Arrays.fill(mEdgeDragsLocked, 0);
        mPointersDown = 0;
    }
Like all callback events this must happen on the UI thread, but release
involves some extra semantics. During a release (mReleaseInProgress)
is the only time it is valid to call {@link #settleCapturedViewAt(int, int)}
or {@link #flingCapturedView(int, int, int, int)}.
app/src/main/java/home/smart/fly/animations/widget/slidepanel/ViewDragHelper.java