[Android]expandablelistview默认展开以及记录已展开或关闭的子布局

1.声明变量

//声明记录停止滚动时候，可见的位置 private int scrollPos,scrollTop; //记录是否展开 private HashMap<Integer, Boolean> gxmap = new HashMap<Integer, Boolean>();

2.默认展开

if(subBaseList.size()>0) { //设置adapter mAdapter = new EqStateExAdapter(context, subBaseList); lvState.setAdapter(mAdapter); } for (int i = 0; i < mAdapter.getGroupCount(); i++) { //默认记录为已展开 gxmap.put(i, true); //全部展开 lvState.expandGroup(i); }

3.listview回调中处理记录

lvState.setOnScrollListener(new AbsListView.OnScrollListener() { @Override public void onScrollStateChanged(AbsListView view, int scrollState) { //滑动时记录当前可见的位置 scrollPos = lvState.getFirstVisiblePosition(); View v1 = lvState.getChildAt(0); scrollTop = (v1 == null) ? 0 : v1.getTop(); } @Override public void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount) {} }); lvState.setOnGroupCollapseListener(new ExpandableListView.OnGroupCollapseListener() { //关闭监听 @Override public void onGroupCollapse(int groupPosition) { gxmap.put(groupPosition, false);//记录 } }); lvState.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() { //展开监听 @Override public void onGroupExpand(int groupPosition) { gxmap.put(groupPosition, true);//记录 } });

4.数据更新后刷新listview

for (int i = 0; i < mAdapter.getGroupCount(); i++) { if(gxmap.size()>0) { //根据记录展开或关闭 Boolean isgx = gxmap.get(i); if (isgx) { lvState.expandGroup(i); } else { lvState.collapseGroup(i); } }else{ //默认展开 lvState.expandGroup(i); } } 记录.