下面列出了怎么用android.widget.AbsListView.OnScrollListener的API类实例代码及写法，或者点击链接到github查看源代码。
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
switch (scrollState) {
case OnScrollListener.SCROLL_STATE_IDLE:
//控制上拉加载更多
if (isSuspend && view.getLastVisiblePosition() == (view.getCount() - 1)) {
mListView.setType(UIListView.TYPE_ONLY_UP_LOADMORD);
}else {
mListView.setType(UIListView.TYPE_NONE);
}
break;
default:
break;
}
}
private String getScrollStateString(int flag) {
String str = "";
switch (flag) {
case OnScrollListener.SCROLL_STATE_IDLE:
str = "SCROLL_STATE_IDLE";
break;
case OnScrollListener.SCROLL_STATE_TOUCH_SCROLL:
str = "SCROLL_STATE_TOUCH_SCROLL";
break;
case OnScrollListener.SCROLL_STATE_FLING:
str = "SCROLL_STATE_FLING";
break;
default:
str = "wrong state";
}
return str;
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
switch (scrollState) {
case OnScrollListener.SCROLL_STATE_IDLE:
taskHandler.resume();
break;
case OnScrollListener.SCROLL_STATE_TOUCH_SCROLL:
if (pauseOnScroll) {
taskHandler.pause();
}
break;
case OnScrollListener.SCROLL_STATE_FLING:
if (pauseOnFling) {
taskHandler.pause();
}
break;
}
if (externalListener != null) {
externalListener.onScrollStateChanged(view, scrollState);
}
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
switch (scrollState) {
case OnScrollListener.SCROLL_STATE_IDLE:
imageLoader.resume();
break;
case OnScrollListener.SCROLL_STATE_TOUCH_SCROLL:
if (pauseOnScroll) {
imageLoader.pause();
}
break;
case OnScrollListener.SCROLL_STATE_FLING:
if (pauseOnFling) {
imageLoader.pause();
}
break;
}
if (externalListener != null) {
externalListener.onScrollStateChanged(view, scrollState);
}
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// Store the scrolling state of the listview
Log.v(TAG, "Scrolling state: " + scrollState);
switch (scrollState) {
case OnScrollListener.SCROLL_STATE_IDLE:
mListScrolling = false;
break;
case OnScrollListener.SCROLL_STATE_TOUCH_SCROLL:
// List is scrolling under the direct touch of the user
mListScrolling = true;
break;
case OnScrollListener.SCROLL_STATE_FLING:
// The user did a 'fling' on the list and it's still
// scrolling
mListScrolling = true;
break;
}
}
public final void onScrollStateChanged(final AbsListView view, final int state)
{
/**
* Check that the scrolling has stopped, and that the last item is
* visible.
*/
if (state == OnScrollListener.SCROLL_STATE_IDLE && null != mOnLastItemVisibleListener && mLastItemVisible)
{
mOnLastItemVisibleListener.onLastItemVisible();
}
if (null != mOnScrollListener)
{
mOnScrollListener.onScrollStateChanged(view, state);
}
}
/**
* 当View在进行滚动的时候，回调的onScrollStateChanged方法，在其中根据滚动的事件相关类型判断，
* 暂停和开启ImageLoader加载图片
* @param view
* @param scrollState
*/
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
switch (scrollState) {
case OnScrollListener.SCROLL_STATE_IDLE:
//恢复ImageLoader加载
imageLoader.resume();
break;
case OnScrollListener.SCROLL_STATE_TOUCH_SCROLL:
//判断标记,是否暂停ImageLoader加载
if (pauseOnScroll) {
imageLoader.pause();
}
break;
case OnScrollListener.SCROLL_STATE_FLING:
//判断标记,是否暂停ImageLoader加载
if (pauseOnFling) {
imageLoader.pause();
}
break;
}
if (externalListener != null) {
externalListener.onScrollStateChanged(view, scrollState);
}
}
public final void onScrollStateChanged(final AbsListView view, final int state) {
/**
* Check that the scrolling has stopped, and that the last item is
* visible.
*/
if (state == OnScrollListener.SCROLL_STATE_IDLE && null != mOnLastItemVisibleListener && mLastItemVisible) {
mOnLastItemVisibleListener.onLastItemVisible();
}
if (null != mOnScrollListener) {
mOnScrollListener.onScrollStateChanged(view, state);
}
}
public void postSetSelection(final int position) {
clearFocus();
post(new Runnable() {
@Override
public void run() {
setSelection(position);
}
});
onScrollStateChanged(this, OnScrollListener.SCROLL_STATE_IDLE);
}
@Override
public void run() {
mCurrentScrollState = mNewState;
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG,
"new scroll state: " + mNewState + " old state: " + mPreviousScrollState);
}
// Fix the position after a scroll or a fling ends
if (mNewState == OnScrollListener.SCROLL_STATE_IDLE
&& mPreviousScrollState != OnScrollListener.SCROLL_STATE_IDLE
&& mPreviousScrollState != OnScrollListener.SCROLL_STATE_TOUCH_SCROLL) {
mPreviousScrollState = mNewState;
int i = 0;
View child = getChildAt(i);
while (child != null && child.getBottom() <= 0) {
child = getChildAt(++i);
}
if (child == null) {
// The view is no longer visible, just return
return;
}
int firstPosition = getFirstVisiblePosition();
int lastPosition = getLastVisiblePosition();
boolean scroll = firstPosition != 0 && lastPosition != getCount() - 1;
final int top = child.getTop();
final int bottom = child.getBottom();
final int midpoint = getHeight() / 2;
if (scroll && top < LIST_TOP_OFFSET) {
if (bottom > midpoint) {
smoothScrollBy(top, GOTO_SCROLL_DURATION);
} else {
smoothScrollBy(bottom, GOTO_SCROLL_DURATION);
}
}
} else {
mPreviousScrollState = mNewState;
}
}
public final void onScrollStateChanged(final AbsListView view, final int state) {
/**
* Check that the scrolling has stopped, and that the last item is
* visible.
*/
if (state == OnScrollListener.SCROLL_STATE_IDLE && null != mOnLastItemVisibleListener && mLastItemVisible) {
mOnLastItemVisibleListener.onLastItemVisible();
}
if (null != mOnScrollListener) {
mOnScrollListener.onScrollStateChanged(view, state);
}
}
public void postSetSelection(final int position) {
clearFocus();
post(new Runnable() {
@Override
public void run() {
setSelection(position);
}
});
onScrollStateChanged(this, OnScrollListener.SCROLL_STATE_IDLE);
}
@Override
public void run() {
mCurrentScrollState = mNewState;
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG,
"new scroll state: " + mNewState + " old state: " + mPreviousScrollState);
}
// Fix the position after a scroll or a fling ends
if (mNewState == OnScrollListener.SCROLL_STATE_IDLE
&& mPreviousScrollState != OnScrollListener.SCROLL_STATE_IDLE
&& mPreviousScrollState != OnScrollListener.SCROLL_STATE_TOUCH_SCROLL) {
mPreviousScrollState = mNewState;
int i = 0;
View child = getChildAt(i);
while (child != null && child.getBottom() <= 0) {
child = getChildAt(++i);
}
if (child == null) {
// The view is no longer visible, just return
return;
}
int firstPosition = getFirstVisiblePosition();
int lastPosition = getLastVisiblePosition();
boolean scroll = firstPosition != 0 && lastPosition != getCount() - 1;
final int top = child.getTop();
final int bottom = child.getBottom();
final int midpoint = getHeight() / 2;
if (scroll && top < LIST_TOP_OFFSET) {
if (bottom > midpoint) {
smoothScrollBy(top, GOTO_SCROLL_DURATION);
} else {
smoothScrollBy(bottom, GOTO_SCROLL_DURATION);
}
}
} else {
mPreviousScrollState = mNewState;
}
}
public final void onScrollStateChanged(final AbsListView view, final int state) {
/**
* Check that the scrolling has stopped, and that the last item is
* visible.
*/
if (state == OnScrollListener.SCROLL_STATE_IDLE && null != mOnLastItemVisibleListener && mLastItemVisible) {
mOnLastItemVisibleListener.onLastItemVisible();
}
if (null != mOnScrollListener) {
mOnScrollListener.onScrollStateChanged(view, state);
}
}
public final void onScrollStateChanged(final AbsListView view, final int state) {
/**
* Check that the scrolling has stopped, and that the last item is
* visible.
*/
if (state == OnScrollListener.SCROLL_STATE_IDLE && null != mOnLastItemVisibleListener && mLastItemVisible) {
mOnLastItemVisibleListener.onLastItemVisible();
}
if (null != mOnScrollListener) {
mOnScrollListener.onScrollStateChanged(view, state);
}
}
public void postSetSelection(final int position) {
clearFocus();
post(new Runnable() {
@Override
public void run() {
setSelection(position);
}
});
onScrollStateChanged(this, OnScrollListener.SCROLL_STATE_IDLE);
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if (isScrollLoadEnabled() && hasMoreData()) {
if (scrollState == OnScrollListener.SCROLL_STATE_IDLE
|| scrollState == OnScrollListener.SCROLL_STATE_FLING) {
if (isReadyForPullUp()) {
startLoading();
}
}
}
if (null != mScrollListener) {
mScrollListener.onScrollStateChanged(view, scrollState);
}
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// Pause disk cache access to ensure smoother scrolling
if (scrollState == AbsListView.OnScrollListener.SCROLL_STATE_FLING) {
mImageLoader.stopProcessingQueue();
} else {
mImageLoader.startProcessingQueue();
}
}
@Override
public void run() {
mCurrentScrollState = mNewState;
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG,
"new scroll state: " + mNewState + " old state: " + mPreviousScrollState);
}
// Fix the position after a scroll or a fling ends
if (mNewState == OnScrollListener.SCROLL_STATE_IDLE
&& mPreviousScrollState != OnScrollListener.SCROLL_STATE_IDLE
&& mPreviousScrollState != OnScrollListener.SCROLL_STATE_TOUCH_SCROLL) {
mPreviousScrollState = mNewState;
int i = 0;
View child = getChildAt(i);
while (child != null && child.getBottom() <= 0) {
child = getChildAt(++i);
}
if (child == null) {
// The view is no longer visible, just return
return;
}
int firstPosition = getFirstVisiblePosition();
int lastPosition = getLastVisiblePosition();
boolean scroll = firstPosition != 0 && lastPosition != getCount() - 1;
final int top = child.getTop();
final int bottom = child.getBottom();
final int midpoint = getHeight() / 2;
if (scroll && top < LIST_TOP_OFFSET) {
if (bottom > midpoint) {
smoothScrollBy(top, GOTO_SCROLL_DURATION);
} else {
smoothScrollBy(bottom, GOTO_SCROLL_DURATION);
}
}
} else {
mPreviousScrollState = mNewState;
}
}
public final void onScrollStateChanged(final AbsListView view, final int state) {
/**
* Check that the scrolling has stopped, and that the last item is visible.
*/
if(state == OnScrollListener.SCROLL_STATE_IDLE && null != mOnLastItemVisibleListener && mLastItemVisible) {
mOnLastItemVisibleListener.onLastItemVisible();
}
if(null != mOnScrollListener) {
mOnScrollListener.onScrollStateChanged(view, state);
}
canInvoke = true;
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// TODO Auto-generated method stub
if (scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE) {
showImage(mFirstVisibleItem, mVisibleItemCount);
} else {
cancleTask();
}
}
public final void onScrollStateChanged(final AbsListView view,
final int state) {
/**
* Check that the scrolling has stopped, and that the last item is
* visible.
*/
if (state == OnScrollListener.SCROLL_STATE_IDLE
&& null != mOnLastItemVisibleListener && mLastItemVisible) {
mOnLastItemVisibleListener.onLastItemVisible();
}
if (null != mOnScrollListener) {
mOnScrollListener.onScrollStateChanged(view, state);
}
}
@Override
public void run() {
mCurrentScrollState = mNewState;
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG,
"new scroll state: " + mNewState + " old state: " + mPreviousScrollState);
}
// Fix the position after a scroll or a fling ends
if (mNewState == OnScrollListener.SCROLL_STATE_IDLE
&& mPreviousScrollState != OnScrollListener.SCROLL_STATE_IDLE
&& mPreviousScrollState != OnScrollListener.SCROLL_STATE_TOUCH_SCROLL) {
mPreviousScrollState = mNewState;
int i = 0;
View child = getChildAt(i);
while (child != null && child.getBottom() <= 0) {
child = getChildAt(++i);
}
if (child == null) {
// The view is no longer visible, just return
return;
}
int firstPosition = getFirstVisiblePosition();
int lastPosition = getLastVisiblePosition();
boolean scroll = firstPosition != 0 && lastPosition != getCount() - 1;
final int top = child.getTop();
final int bottom = child.getBottom();
final int midpoint = getHeight() / 2;
if (scroll && top < LIST_TOP_OFFSET) {
if (bottom > midpoint) {
smoothScrollBy(top, GOTO_SCROLL_DURATION);
} else {
smoothScrollBy(bottom, GOTO_SCROLL_DURATION);
}
}
} else {
mPreviousScrollState = mNewState;
}
}
public final void onScrollStateChanged(final AbsListView view, final int state) {
/**
* Check that the scrolling has stopped, and that the last item is
* visible.
*/
if (state == OnScrollListener.SCROLL_STATE_IDLE && null != mOnLastItemVisibleListener && mLastItemVisible) {
mOnLastItemVisibleListener.onLastItemVisible();
}
if (null != mOnScrollListener) {
mOnScrollListener.onScrollStateChanged(view, state);
}
}
public void postSetSelection(final int position) {
clearFocus();
post(new Runnable() {
@Override
public void run() {
setSelection(position);
}
});
onScrollStateChanged(this, OnScrollListener.SCROLL_STATE_IDLE);
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if(OnScrollListener.SCROLL_STATE_IDLE == scrollState){
isScrolling = false;
notifyDataSetChanged();
}
else{
isScrolling = true;
}
if(outScrollListener != null){
outScrollListener.onScrollStateChanged(view, scrollState);
}
}
public final void onScrollStateChanged(final AbsListView view, final int state) {
/**
* Check that the scrolling has stopped, and that the last item is
* visible.
*/
if (state == OnScrollListener.SCROLL_STATE_IDLE && null != mOnLastItemVisibleListener && mLastItemVisible) {
mOnLastItemVisibleListener.onLastItemVisible();
}
if (null != mOnScrollListener) {
mOnScrollListener.onScrollStateChanged(view, state);
}
}
private void ifNeedLoad(AbsListView view, int scrollState) {
if (!loadEnable) {
return;
}
try {
if (scrollState == OnScrollListener.SCROLL_STATE_IDLE
&& !isLoading
&& view.getLastVisiblePosition() == view
.getPositionForView(footer) && !isLoadFull) {
onLoad();
isLoading = true;
}
} catch (Exception e) {
}
}
@Test
public void shouldNotifyAdditionalScrollListenerOnScrollStateChanged() {
OnScrollListener mockedScrollListener = mock(OnScrollListener.class);
scrollAnimator.setAdditionalScrollListener(mockedScrollListener);
scrollAnimator.configureListView(listView);
doAnyScrollAction();
verify(mockedScrollListener).onScrollStateChanged(listView, ANY_SCROLL_ACTION);
}
public void setOnScrollListener(OnScrollListener l) {
this.mOnScrollListenerDelegate = l;
}