如何实现下拉刷新，并拉起的扩展列表视图刷新 [英] How to implement Pull down to Refresh and pull up to refresh in Expandable List View
本文介绍了如何实现下拉刷新，并拉起的扩展列表视图刷新的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我要实现下拉刷新，并拉起扩展列表视图刷新。
我使用的扩展列表视图。下面是用java code包含可扩展列表视图。
公共类LoadMoreListView扩展ExpandableListView实现OnScrollListener {私有静态最后弦乐TAG =LoadMoreListView;/ **
*监听，每次都会收到通知的列表滚动。
* /
私人OnScrollListener mOnScrollListener;
私人LayoutInflater mInflater;//页脚视图
私人的RelativeLayout mFooterView;
//私人TextView的mLabLoadMore;
私人进度mProgressBarLoadMore;//监听器来处理负载更多的物品，当用户到达列表的末尾
私人OnLoadMoreListener mOnLoadMoreListener;
//要知道如果列表加载多个项目
私人布尔mIsLoadingMore = FALSE;
私人诠释mCurrentScrollState;公共LoadMoreListView（上下文的背景下）{
超级（上下文）;
初始化（上下文）;
}公共LoadMoreListView（上下文的背景下，ATTRS的AttributeSet）{
超（背景下，ATTRS）;
初始化（上下文）;
}公共LoadMoreListView（上下文的背景下，ATTRS的AttributeSet，诠释defStyle）{
超（背景下，ATTRS，defStyle）;
初始化（上下文）;
}私人无效的init（上下文的背景下）{ mInflater =（LayoutInflater）上下文
.getSystemService（Context.LAYOUT_INFLATER_SERVICE）; //页脚
mFooterView =（RelativeLayout的）mInflater.inflate（
R.layout.load_more_footer，这一点，假）;
/ *
* mLabLoadMore =（TextView中）mFooterView
* .findViewById（R.id.load_more_lab_view）;
* /
mProgressBarLoadMore =（进度）mFooterView
.findViewById（R.id.load_more_progressBar）; addFooterView（mFooterView）; super.setOnScrollListener（本）;
}@覆盖
公共无效setAdapter（ListAdapter适配器）{
super.setAdapter（适配器）;
}/ **
*设置将收到通知，每次列表中的监听器
*卷轴。
*
* @参数升
*滚动侦听器。
* /
@覆盖
公共无效setOnScrollListener（AbsListView.OnScrollListener L）{
mOnScrollListener = 1;
}/ **
*注册一个回调被调用时，这个名单到达终点（最后
*项目可见）
*
* @参数onLoadMoreListener
*回调运行。
* /公共无效setOnLoadMoreListener（OnLoadMoreListener onLoadMoreListener）{
mOnLoadMoreListener = onLoadMoreListener;
}公共无效onScroll（AbsListView观点，诠释firstVisibleItem，
INT visibleItemCount，诠释totalItemCount）{ 如果（mOnScrollListener！= NULL）{
mOnScrollListener.onScroll（查看，firstVisibleItem，
visibleItemCount，totalItemCount）;
} 如果（mOnLoadMoreListener！= NULL）{ 如果（visibleItemCount == totalItemCount）{
mProgressBarLoadMore.setVisibility（View.GONE）;
// mLabLoadMore.setVisibility（View.GONE）;
返回;
} 布尔loadMore = firstVisibleItem + visibleItemCount＆GT; = totalItemCount; 如果（mIsLoadingMore＆安培;！＆安培; loadMore
＆功放;＆安培; mCurrentScrollState！= SCROLL_STATE_IDLE）{
mProgressBarLoadMore.setVisibility（View.VISIBLE）;
// mLabLoadMore.setVisibility（View.VISIBLE）;
mIsLoadingMore = TRUE;
onLoadMore（）;
} }}公共无效onScrollStateChanged（AbsListView观点，诠释scrollState）{
mCurrentScrollState = scrollState; 如果（mOnScrollListener！= NULL）{
mOnScrollListener.onScrollStateChanged（查看，scrollState）;
}}公共无效onLoadMore（）{
Log.d（TAGonLoadMore）;
如果（mOnLoadMoreListener！= NULL）{
mOnLoadMoreListener.onLoadMore（）;
}
}/ **
*通知装载更多的操作已完成
* /
公共无效onLoadMoreComplete（）{
mIsLoadingMore = FALSE;
mProgressBarLoadMore.setVisibility（View.GONE）;
}/ **
当列表到达被调用*回调接口定义
*最后一个项目（在列表中的用户负载更多的物品）
* /
公共接口OnLoadMoreListener {
/ **
*当列表到达最后一个项目叫（最后一个项目是可见
*给用户）
* /
公共无效onLoadMore（）;
}
}
下面是我将使用XML布局文件：
＆LT;？XML版本=1.0编码=UTF-8＆GT？;
＆LT; LinearLayout中的xmlns：机器人=http://schemas.android.com/apk/res/android
机器人：layout_width =match_parent
机器人：layout_height =match_parent
机器人：方向=垂直＆GT; ＆LT;的LinearLayout
机器人：layout_width =match_parent
机器人：layout_height =match_parent
机器人：layout_marginBottom =15dp
机器人：layout_marginLeft =10dp
机器人：layout_marginRight =10dp
机器人：方向=垂直＆GT; ＆LT; ExpandableListView
机器人：ID =@ + ID / listViewMeeting
机器人：layout_width =match_parent
机器人：layout_height =WRAP_CONTENT
机器人：cacheColorHint =@色/白
机器人：listSelector =@颜色/反式preNT
机器人：groupIndicator =@颜色/反式preNT＆GT; ＆LT; / ExpandableListView＆GT; ＆LT; / LinearLayout中＆GT;＆LT; / LinearLayout中＆GT;
解决方案
该库支持ExpandableListView与PullToRefresh。
替换您的＆LT; ExpandableListView＆GT; 与＆LT; com.handmark.pulltorefresh.library。 PullToRefreshExpandableListView方式＆gt;
I want to implement Pull down to Refresh and pull up to refresh with Expandable List View. I am using Expandable List View. Below is java code that contain Expandable List View.
public class LoadMoreListView extends ExpandableListView implements OnScrollListener {
private static final String TAG = "LoadMoreListView";
/**
* Listener that will receive notifications every time the list scrolls.
*/
private OnScrollListener mOnScrollListener;
private LayoutInflater mInflater;
// footer view
private RelativeLayout mFooterView;
// private TextView mLabLoadMore;
private ProgressBar mProgressBarLoadMore;
// Listener to process load more items when user reaches the end of the list
private OnLoadMoreListener mOnLoadMoreListener;
// To know if the list is loading more items
private boolean mIsLoadingMore = false;
private int mCurrentScrollState;
public LoadMoreListView(Context context) {
super(context);
init(context);
}
public LoadMoreListView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public LoadMoreListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context);
}
private void init(Context context) {
mInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// footer
mFooterView = (RelativeLayout) mInflater.inflate(
R.layout.load_more_footer, this, false);
/*
* mLabLoadMore = (TextView) mFooterView
* .findViewById(R.id.load_more_lab_view);
*/
mProgressBarLoadMore = (ProgressBar) mFooterView
.findViewById(R.id.load_more_progressBar);
addFooterView(mFooterView);
super.setOnScrollListener(this);
}
@Override
public void setAdapter(ListAdapter adapter) {
super.setAdapter(adapter);
}
/**
* Set the listener that will receive notifications every time the list
* scrolls.
*
* @param l
* The scroll listener.
*/
@Override
public void setOnScrollListener(AbsListView.OnScrollListener l) {
mOnScrollListener = l;
}
/**
* Register a callback to be invoked when this list reaches the end (last
* item be visible)
*
* @param onLoadMoreListener
* The callback to run.
*/
public void setOnLoadMoreListener(OnLoadMoreListener onLoadMoreListener) {
mOnLoadMoreListener = onLoadMoreListener;
}
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
if (mOnScrollListener != null) {
mOnScrollListener.onScroll(view, firstVisibleItem,
visibleItemCount, totalItemCount);
}
if (mOnLoadMoreListener != null) {
if (visibleItemCount == totalItemCount) {
mProgressBarLoadMore.setVisibility(View.GONE);
// mLabLoadMore.setVisibility(View.GONE);
return;
}
boolean loadMore = firstVisibleItem + visibleItemCount >= totalItemCount;
if (!mIsLoadingMore && loadMore
&& mCurrentScrollState != SCROLL_STATE_IDLE) {
mProgressBarLoadMore.setVisibility(View.VISIBLE);
// mLabLoadMore.setVisibility(View.VISIBLE);
mIsLoadingMore = true;
onLoadMore();
}
}
}
public void onScrollStateChanged(AbsListView view, int scrollState) {
mCurrentScrollState = scrollState;
if (mOnScrollListener != null) {
mOnScrollListener.onScrollStateChanged(view, scrollState);
}
}
public void onLoadMore() {
Log.d(TAG, "onLoadMore");
if (mOnLoadMoreListener != null) {
mOnLoadMoreListener.onLoadMore();
}
}
/**
* Notify the loading more operation has finished
*/
public void onLoadMoreComplete() {
mIsLoadingMore = false;
mProgressBarLoadMore.setVisibility(View.GONE);
}
/**
* Interface definition for a callback to be invoked when list reaches the
* last item (the user load more items in the list)
*/
public interface OnLoadMoreListener {
/**
* Called when the list reaches the last item (the last item is visible
* to the user)
*/
public void onLoadMore();
}
}
Below is Xml Layout File that i will use:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="15dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:orientation="vertical" >
<ExpandableListView
android:id="@+id/listViewMeeting"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:cacheColorHint="@color/White"
android:listSelector="@color/transprent"
android:groupIndicator="@color/transprent" >
</ExpandableListView>
</LinearLayout>
</LinearLayout>
解决方案
This library supports ExpandableListView with PullToRefresh.
Replace your <ExpandableListView> with <com.handmark.pulltorefresh.library. PullToRefreshExpandableListView>.
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