@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if (mContentView.getLastVisiblePosition() >= totalCount - 1 && !isLoading) {
footerContent.setVisibility(View.VISIBLE);
searchNextPage();
}
}
/** 判断是否到了最底部 */
private boolean isBottom() {
if (mListView != null && mListView.getAdapter() != null) {
return mListView.getLastVisiblePosition() == (mListView.getAdapter().getCount() - 1);
}
return false;
}
/**
* Notifies the menu that the contents of the menu item specified by {@code menuRowId} have
* changed. This should be called if icons, titles, etc. are changing for a particular menu item
* while the menu is open.
*
* @param menuRowId The id of the menu item to change. This must be a row id and not a child id.
*/
public void menuItemContentChanged(int menuRowId) {
// Make sure we have all the valid state objects we need.
if (mAdapter == null || mMenu == null || mPopup == null || mPopup.getListView() == null) {
return;
}
// Calculate the item index.
int index = -1;
int menuSize = mMenu.size();
for (int i = 0; i < menuSize; i++) {
if (mMenu.getItem(i).getItemId() == menuRowId) {
index = i;
break;
}
}
if (index == -1) return;
// Check if the item is visible.
ListView list = mPopup.getListView();
int startIndex = list.getFirstVisiblePosition();
int endIndex = list.getLastVisiblePosition();
if (index < startIndex || index > endIndex) return;
// Grab the correct View.
View view = list.getChildAt(index - startIndex);
if (view == null) return;
// Cause the Adapter to re-populate the View.
list.getAdapter().getView(index, view, list);
}
private void reset() {
int begin = mListView.getFirstVisiblePosition();
int end = mListView.getLastVisiblePosition();
if (mAdapter.cancelSelection(mListView, begin, end) < 1 && mFromMenu) {
mActionMode.finish();
}
}
public View getView(int position, View convertView, ViewGroup parent) {
AlbumDescriptor albumDescriptor = mData.get(position);
if (null == convertView || !albumDescriptor.getAlbumId().equals(convertView.getTag())) {
LayoutInflater inflater = LayoutInflater.from(mContext);
convertView = (ViewGroup) inflater.inflate(R.layout.album_list_item, parent, false);
convertView.setTag(albumDescriptor.getAlbumId());
}
ListView theListView = null;
if (parent instanceof ListView) {
theListView = (ListView) parent;
}
final TextView albumText = (TextView) convertView.findViewById(R.id.item_title);
albumText.setText("" + albumDescriptor.getPhotosCount() + " hot photos");
final ImageViewProxy imgView = (ImageViewProxy) convertView.findViewById(R.id.album_cover);
imgView.setImageLink(albumDescriptor.getCoverLinkage());
imgView.setLoadingIcon(Constants.IMG_LOADING);
imgView.setImageChangeListener(
new ImageViewProxy.OnImageChangeListiner() {
@Override
public void onImageChanged() {
Rect rect = imgView.getDrawable().copyBounds();
Point size = GraphicsUtil.getDisplaySize(imgView.getContext());
if (0 == rect.width() || 0 == size.x) {
// wrong, possible 'divided by 0'
return;
}
// TODO HERE TO CALC
// suppose the image is wider than screen width
int height =
rect.height()
* imgView.getLayoutParams().width
/ rect.width(); // size.x is screen width.
/*
if(size.x > rect.width()) {
//TODO HERE TO CALC
height = (int)(rect.height() * 1.1);
}
imgView.setScaleType(ImageView.ScaleType.FIT_CENTER);
imgView.getLayoutParams().height = height;
imgView.requestLayout();
*/
}
});
if (position > theListView.getFirstVisiblePosition() - PRE_LOAD_COUNT
|| position < theListView.getLastVisiblePosition() + PRE_LOAD_COUNT) {
imgView.show();
}
albumDescriptor.printInfo();
return convertView;
}
private void setAllUnselected() {
for (int i = 0;
i <= (mListView.getLastVisiblePosition() - mListView.getFirstVisiblePosition());
i++)
mListView
.getChildAt(i)
.setBackgroundColor(getActivity().getResources().getColor(R.color.non_selected_color));
}
private void reprioritizeDownloads() {
int lastVisibleItem = listView.getLastVisiblePosition();
if (lastVisibleItem >= 0) {
int firstVisibleItem = listView.getFirstVisiblePosition();
adapter.prioritizeViewRange(
firstVisibleItem, lastVisibleItem, PROFILE_PICTURE_PREFETCH_BUFFER);
}
}
/**
* Highlight current playing item Make the playing item can be seen.
*
* @param position
*/
private void onItemPlay(int position) {
// Make the the playing item can be seen.
mMusicListView.smoothScrollToPosition(position);
int prePlayingPosition = mMusicListAdapter.getPlayingPosition();
if (prePlayingPosition >= mMusicListView.getFirstVisiblePosition()
&& prePlayingPosition <= mMusicListView.getLastVisiblePosition()) {
int preItem = prePlayingPosition - mMusicListView.getFirstVisiblePosition();
((ViewGroup) mMusicListView.getChildAt(preItem)).getChildAt(0).setVisibility(View.INVISIBLE);
}
mMusicListAdapter.setPlayingPosition(position);
if (mMusicListView.getLastVisiblePosition() < position
|| mMusicListView.getFirstVisiblePosition() > position) return;
int currentItem = position - mMusicListView.getFirstVisiblePosition();
((ViewGroup) mMusicListView.getChildAt(currentItem)).getChildAt(0).setVisibility(View.VISIBLE);
}
public static void ensureVisible(ListView list, int positionToShow) {
// TODO could be enhanced by using setSelectionFromTop(). setSelection
// always scrolls the list to the same offset, would prefer to show item
// at top/bottom depending on direction
if (positionToShow < list.getFirstVisiblePosition()
|| positionToShow > list.getLastVisiblePosition()) {
list.setSelection(positionToShow);
}
}
public void loadImage() {
int start = mListView.getFirstVisiblePosition();
int end = mListView.getLastVisiblePosition();
if (end >= getCount()) {
end = getCount() - 1;
}
syncImageLoader.setLoadLimit(start, end);
syncImageLoader.unlock();
}
private boolean isBottom() {
if (mListView.getCount() > 0) {
if (mListView.getLastVisiblePosition() == mListView.getAdapter().getCount() - 1
&& mListView.getChildAt(mListView.getChildCount() - 1).getBottom()
<= mListView.getHeight()) {
return true;
}
}
return false;
}
private void updateSubTabUI(boolean refresh) {
int lastPosition = contentList.getLastVisiblePosition();
Log.d(TAG, "lastVisible position is " + lastPosition);
FacebookEventAdapter fea =
new FacebookEventAdapter(FacebookEventActivity.this, event, withFooterView, simpleViewMode);
contentList.setAdapter(fea);
// if after refreshing, do not set select position.
if (refresh == false) {
contentList.setSelection(lastPosition + 1);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// Refresh the app that was just edited, if it's visible in the list
ListView list = (ListView) findViewById(R.id.lstApps);
if (requestCode >= list.getFirstVisiblePosition()
&& requestCode <= list.getLastVisiblePosition()) {
View v = list.getChildAt(requestCode - list.getFirstVisiblePosition());
list.getAdapter().getView(requestCode, v, list);
}
}
@Override
public boolean getIsListViewToBottom() {
if ((singleChatLv.getChildAt(-1 + singleChatLv.getChildCount()).getBottom()
> singleChatLv.getHeight())
|| (singleChatLv.getLastVisiblePosition()
!= -1 + singleChatLv.getAdapter().getCount())) {
return false;
} else {
return true;
}
}
private void updateView(int index) {
int firstVisiblePosition = lv_no_receive.getFirstVisiblePosition();
int lastVisiblePosition = lv_no_receive.getLastVisiblePosition();
if (index >= firstVisiblePosition && index <= lastVisiblePosition) {
View view = lv_no_receive.getChildAt(index - firstVisiblePosition);
if (view.getTag() instanceof NoReceivedAdapter.ExpressHolder) {
NoReceivedAdapter.ExpressHolder vh = (NoReceivedAdapter.ExpressHolder) view.getTag();
vh.tv_express_notice.setBackgroundDrawable(CommonUtils.creatRectangleDrawble("#d0d0d0"));
// 改变状态 不能再通知
noReceivedAdapter.getItem(index).canNotify = false;
}
}
}
/**
* Scroll view to the center of the list
*
* @param view
* @param parent
*/
public static void scrollViewToCenter(View view, ListView parent) {
ListAdapter items = parent.getAdapter();
int viewY = view.getTop() + view.getHeight() / 2 - parent.getHeight() / 2;
if (viewY < 0 && parent.getFirstVisiblePosition() == 0) {
parent.smoothScrollToPosition(0);
} else if (viewY > 0 && parent.getLastVisiblePosition() == items.getCount() - 1) {
parent.smoothScrollToPosition(items.getCount() - 1);
} else {
Command.invoke(SCROLL_LIST_FOR_DISTANCE_IN_ANY_MILLIS)
.args(parent, viewY, 300)
.only()
.sendDelayed(100);
}
}
// 肯定是在当前的session内
private void onMsgRecv(MessageEntity entity) {
logger.d("message_activity#onMsgRecv");
imService.getUnReadMsgManager().ackReadMsg(entity);
logger.d("chat#start pushList");
pushList(entity);
ListView lv = lvPTR.getRefreshableView();
if (lv != null) {
if (lv.getLastVisiblePosition() < adapter.getCount()) {
textView_new_msg_tip.setVisibility(View.VISIBLE);
} else {
scrollToBottomListItem();
}
}
}
private void changeListView() {
int visiblePosition = leftView.getFirstVisiblePosition();
int lastVisiblePosition = leftView.getLastVisiblePosition();
int selectedItemNum = selectItemPosition - visiblePosition;
// Log.d("LogonActivity", String.format("SildingLayout：visiblePosition:%d ,lastVisiblePosition
// %d",visiblePosition,lastVisiblePosition));
for (int i = 0; i <= lastVisiblePosition - visiblePosition; i++) // 获取ListView的所有Item数目
{
// LinearLayout linearlayout = (LinearLayout)mListView.getChildAt(i);
View view = leftView.getChildAt(i);
if (view != null && view.getTag() != null) {
LeftViewAdapter.ViewHolder holder = (LeftViewAdapter.ViewHolder) view.getTag();
// holder.textView.setText(String.valueOf(parentViewScrollX));
holder.description.setAlpha(Math.abs(parentView.getX()) / viewWidth);
if (i == selectedItemNum) {
holder.textView.setText("我被选中了！");
}
}
}
}
private void updateRead() {
Log.d(TAG, "Updating buffer read, chat is visible: " + getUserVisibleHint());
if (adapter.buffer != null) {
// Don't save position if list is at bottom
if (backlogList.getLastVisiblePosition() == adapter.getCount() - 1) {
adapter.buffer.setTopMessageShown(0);
} else {
adapter.buffer.setTopMessageShown(adapter.getListTopMessageId());
}
if (adapter.buffer.getUnfilteredSize() != 0) {
BusProvider.getInstance()
.post(new ManageChannelEvent(adapter.getBufferId(), ChannelAction.MARK_AS_READ));
BusProvider.getInstance()
.post(
new ManageMessageEvent(
adapter.getBufferId(),
adapter.buffer.getUnfilteredBacklogEntry(adapter.buffer.getUnfilteredSize() - 1)
.messageId,
MessageAction.LAST_SEEN));
}
}
}
private boolean isCurrentListViewItemVisible(int position) {
int first = listView.getFirstVisiblePosition();
int last = listView.getLastVisiblePosition();
return first <= position && position <= last;
}
public void testTouchEvents() {
TouchUtils.scrollToBottom(this, getActivity(), list);
getInstrumentation().waitForIdleSync();
assertEquals(list.getLastVisiblePosition(), 24);
}
package com.chang.news.util;
@Override
public int[] findLastVisibleItemPositions() {
return new int[] {mListView.getLastVisiblePosition()};
}