@Override
public void scrollBy(int x, int y) {
super.scrollBy(x, y);
progressUpdate();
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
/*
* 记录起始信息
*/
mStartY = ev.getY();
mLastY = ev.getY();
mDispatched = true;
mCanceledScroll = false;
break;
case MotionEvent.ACTION_MOVE:
float dy = ev.getY() - mLastY;
float dySinceStart = (ev.getY() - mStartY) / RATIO;
mLastY = ev.getY();
/*
* 自动切换卡片事件触发
*/
if ((mMovingAnimation == null || mMovingAnimation.isAnimationEnded())
&& mDispatched
&& mCurrentCardView != null
&& Math.abs(dySinceStart) > mCurrentCardView.getCardShrinkHeight()) {
int indexNext = -1;
if (dySinceStart > 0) {
indexNext = mCardLayouts.indexOf(mCurrentCardView) - 1;
} else {
indexNext = mCardLayouts.indexOf(mCurrentCardView) + 1;
}
if (indexNext >= 0 && indexNext < mCardLayouts.size()) {
onCardClick(mCardLayouts.get(indexNext));
mDispatched = false;
mCanceledScroll = true;
}
}
/*
* 操作滚动条
*/
if (!mCanceledScroll) {
mContainerScrollView.scrollBy(0, -(int) (dy / RATIO));
}
break;
case MotionEvent.ACTION_UP:
/*
* 松开手指，自动回弹效果
*/
if ((mMovingAnimation == null || mMovingAnimation.isAnimationEnded())
&& mCurrentCardView != null) {
mContainerScrollView.smoothScrollTo(
0,
mCardLayouts.indexOf(mCurrentCardView) * mCurrentCardView.getCardShrinkHeight()
- (getMeasuredHeight() - mCurrentCardView.getCardExpandHeight()) / 2);
}
/*
* 恢复初始状态
*/
mDispatched = false;
mCanceledScroll = false;
break;
}
return super.dispatchTouchEvent(ev);
}
