Question

我正在使用可扩展列表视图开发android应用程序。其实我需要的是，我正在列出包含孩子的群组。

如果我选择一个不可扩展的组，它应该展开，在我选择第二组之后，第一组应该被折叠。我做谷歌，但我找不到我想要的东西。请帮帮我。

Answer 1

将当前扩展的组位置存储在变量中。在onGroupExpanded中执行以下操作。

private int lastExpandedPosition = -1;
private ExpandableListView lv; //your expandable listview
...

lv.setOnGroupExpandListener(new OnGroupExpandListener() {

    @Override
    public void onGroupExpand(int groupPosition) {
            if (lastExpandedPosition != -1
                    && groupPosition != lastExpandedPosition) {
                lv.collapseGroup(lastExpandedPosition);
            }
            lastExpandedPosition = groupPosition;
    }
});

Answer 2

使用此代码可以使用

expandableList.setOnGroupExpandListener(new OnGroupExpandListener() {
    int previousItem = -1;

    @Override
    public void onGroupExpand(int groupPosition) {
        if(groupPosition != previousItem )
            expandableList.collapseGroup(previousItem );
        previousItem = groupPosition;
    }
});

Answer 3

@Override
    public void onGroupExpanded(int groupPosition){
        //collapse the old expanded group, if not the same
        //as new group to expand
        if(groupPosition != lastExpandedGroupPosition){
            listView.collapseGroup(lastExpandedGroupPosition);
        }

        super.onGroupExpanded(groupPosition);           
        lastExpandedGroupPosition = groupPosition;
    }

Answer 4

如果ExpandableListView有两个以上的组：

/opt/docker/lib/containers

除了点击的组外，它将折叠所有组。

Answer 5

获取ExpendableListView，然后覆盖以下方法 - setOnGroupExpandListener

expandableListView = (ExpandableListView) findViewById(R.id.exp_listview);

expandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
        int previousItem = -1;

        @Override
        public void onGroupExpand(int groupPosition) {
            if (groupPosition != previousItem)
                expandableListView.collapseGroup(previousItem);
            previousItem = groupPosition;
        }
    });

Answer 6

尝试将它放在ExpandableListAdapter中，listView是对ExpandableListView本身的引用。 lastExpandedGroupPosition是在ExpandableListAdapter中定义的整数成员变量。

 @Override
    public void onGroupExpanded(int groupPosition)

{

//collapse the old expanded group, if not the same

//as new group to expand

if(groupPosition != lastExpandedGroupPosition)

{

  listView.collapseGroup(lastExpandedGroupPosition);

  }

        super.onGroupExpanded(groupPosition);           
        lastExpandedGroupPosition = groupPosition;
    }

Answer 7

   elstListView1.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
        @Override
        public void onGroupExpand(int groupPosition) {
            for(int i=0;i<listDataHeader.size();i++){
                if(i==groupPosition){
                    //do nothing}
                    else{
                        elstListView1.collapseGroup(i);
                    }
                }
            }
        });

Answer 8

我也遇到了同样的问题。但我可以通过以下代码解决我的问题：

因为我在可扩展列表中有4个Header，基于我这样写的

expListView.setOnGroupExpandListener(new OnGroupExpandListener() {

            @Override
            public void onGroupExpand(int groupPos) {
                // TODO Auto-generated method stub
                expListView.collapseGroup(groupPos+1);
                expListView.collapseGroup(groupPos-1);
                expListView.collapseGroup(groupPos-2);
                expListView.collapseGroup(groupPos+2);
                expListView.collapseGroup(groupPos+3);
                expListView.collapseGroup(groupPos-3);
            }
        });`

在expandable listview android中折叠除选定组之外的所有组

8 个答案: