@Override
public boolean onTouchEvent(MotionEvent event) {
final int y = (int) event.getY();
mBounceHack = false;
switch (event.getAction()) {
case MotionEvent.ACTION_UP:
if (!isVerticalScrollBarEnabled()) {
setVerticalScrollBarEnabled(true);
}
if (getFirstVisiblePosition() == 0 && mRefreshState != REFRESHING) {
if ((mRefreshView.getBottom() >= mRefreshViewHeight || mRefreshView.getTop() >= 0)
&& mRefreshState == RELEASE_TO_REFRESH) {
// Initiate the refresh
mRefreshState = REFRESHING;
prepareForRefresh();
onRefresh();
} else if (mRefreshView.getBottom() < mRefreshViewHeight || mRefreshView.getTop() <= 0) {
// Abort refresh and scroll down below the refresh view
resetHeader();
setSelection(1);
}
}
break;
case MotionEvent.ACTION_DOWN:
mLastMotionY = y;
break;
case MotionEvent.ACTION_MOVE:
applyHeaderPadding(event);
break;
}
return super.onTouchEvent(event);
}
/** drop down complete, restore view status */
public void onDropDownComplete() {
if (isDropDownStyle) {
setHeaderStatusClickToLoad();
if (headerLayout.getBottom() > 0) {
invalidateViews();
setSecondPositionVisible();
}
}
}
@Override
public void onScroll(
AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
// When the refresh view is completely visible, change the text to say
// "Release to refresh..." and flip the arrow drawable.
if (refreshOn) {
if (mCurrentScrollState == SCROLL_STATE_TOUCH_SCROLL && mRefreshState != REFRESHING) {
if (firstVisibleItem == 0) {
mRefreshViewImage.setVisibility(View.VISIBLE);
if ((mRefreshView.getBottom() >= mRefreshViewHeight + 20 || mRefreshView.getTop() >= 0)
&& mRefreshState != RELEASE_TO_REFRESH) {
mRefreshViewText.setText("Release to refresh...");
mRefreshViewImage.clearAnimation();
mRefreshViewImage.startAnimation(mFlipAnimation);
mRefreshState = RELEASE_TO_REFRESH;
} else if (mRefreshView.getBottom() < mRefreshViewHeight + 20
&& mRefreshState != PULL_TO_REFRESH) {
mRefreshViewText.setText("Pull to refresh...");
if (mRefreshState != TAP_TO_REFRESH) {
mRefreshViewImage.clearAnimation();
mRefreshViewImage.startAnimation(mReverseFlipAnimation);
}
mRefreshState = PULL_TO_REFRESH;
}
} else {
mRefreshViewImage.setVisibility(View.GONE);
resetHeader();
}
} else if (mCurrentScrollState == SCROLL_STATE_FLING
&& firstVisibleItem == 0
&& mRefreshState != REFRESHING) {
setSelection(1);
mBounceHack = true;
} else if (mBounceHack && mCurrentScrollState == SCROLL_STATE_FLING) {
setSelection(1);
}
}
if (mOnScrollListener != null) {
mOnScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
}
}
/** Resets the list to a normal state after a refresh. */
public void onRefreshComplete() {
Log.d(TAG, "onRefreshComplete");
resetHeader();
// If refresh view is visible when loading completes, scroll down to
// the next item.
if (mRefreshView.getBottom() > 0) {
invalidateViews();
setSelection(1);
}
}
@Override
public void onScroll(
AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
if (isDropDownStyle) {
if (currentScrollState == SCROLL_STATE_TOUCH_SCROLL
&& currentHeaderStatus != HEADER_STATUS_LOADING) {
/**
* when state of ListView is SCROLL_STATE_TOUCH_SCROLL(ListView is scrolling and finger is
* on screen) and header status is not HEADER_STATUS_LOADING
*
* <ul>
* if header layout is visiable,
* <li>if height of header is higher than a fixed value, then set header status to
* HEADER_STATUS_RELEASE_TO_LOAD.
* <li>else set header status to HEADER_STATUS_DROP_DOWN_TO_LOAD.
* </ul>
*
* <ul>
* if header layout is not visiable,
* <li>set header status to HEADER_STATUS_CLICK_TO_LOAD.
* </ul>
*/
if (firstVisibleItem == 0) {
headerImage.setVisibility(View.VISIBLE);
int pointBottom = headerOriginalHeight + headerReleaseMinDistance;
if (headerLayout.getBottom() >= pointBottom) {
setHeaderStatusReleaseToLoad();
} else if (headerLayout.getBottom() < pointBottom) {
setHeaderStatusDropDownToLoad();
}
} else {
setHeaderStatusClickToLoad();
}
} else if (currentScrollState == SCROLL_STATE_FLING
&& firstVisibleItem == 0
&& currentHeaderStatus != HEADER_STATUS_LOADING) {
/**
* when state of ListView is SCROLL_STATE_FLING(ListView is scrolling but finger has leave
* screen) and first item(header layout) is visible and header status is not
* HEADER_STATUS_LOADING, then hide first item, set second item visible and set
* hasReachedTop true.
*/
setSecondPositionVisible();
hasReachedTop = true;
} else if (currentScrollState == SCROLL_STATE_FLING && hasReachedTop) {
/**
* when state of ListView is SCROLL_STATE_FLING(ListView is scrolling but finger has leave
* screen) and hasReachedTop is true(it's because flick back), then hide first item, set
* second item visible.
*/
setSecondPositionVisible();
}
}
// if isOnBottomStyle and isAutoLoadOnBottom and hasMore, then call
// onBottom function auto
if (isOnBottomStyle && isAutoLoadOnBottom && hasMore) {
if (firstVisibleItem > 0
&& totalItemCount > 0
&& (firstVisibleItem + visibleItemCount == totalItemCount)) {
onBottom();
}
}
if (onScrollListener != null) {
onScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
}
}