xamarin andriod ExpandableListView：从组中删除或隐藏子视图

Question

如何在单击子视图按钮后从组中删除子视图？

class ExpandableListAdapter : BaseExpandableListAdapter { 

    private ListView listview; 
    private LinearLayout mainLayout; 
    private View linearLayout; 

    public Activity _context; 

    TextView txtListChild; 

    private List<string> _listDataHeader; // header titles 
    private Dictionary<string, List<string>> _listDataChild; 

    public ExpandableListAdapter(Activity activity, List<string> listDataHeader, Dictionary<String, List<string>> listChildData) { 
     //, Dictionary<String, List<string>> listChildData2 
     this._context = activity; 
     this._listDataHeader = listDataHeader; 
     this._listDataChild = listChildData; 
     // this._listDataChild2 = listChildData2; 
    } 


    public override Java.Lang.Object GetChild(int groupPosition, int childPosition) { 
     return _listDataChild[_listDataHeader[groupPosition]][childPosition]; 
    } 


    public override long GetChildId(int groupPosition, int childPosition) { 
     return childPosition; 
    } 



    public override View GetChildView(int groupPosition, int childPosition, bool isLastChild, View convertView, ViewGroup parent) { 
     string childText = (string)GetChild(groupPosition, childPosition); 
     convertView = null; 

     if (convertView == null) { 
      convertView = _context.LayoutInflater.Inflate(Resource.Layout.childRowWithButton, null); 

      Button no = (Button)convertView.FindViewById(Resource.Id.gono); 

      no.Click += delegate{ 
       // I want hide my child 
      }; 

      txtListChild.Text = childText; 
     } 
     return convertView; 
    } 

    public override int GetChildrenCount(int groupPosition) { 
     return _listDataChild[_listDataHeader[groupPosition]].Count; 
    } 

    public override Java.Lang.Object GetGroup(int groupPosition) { 
     return _listDataHeader[groupPosition]; 
    } 


    public override long GetGroupId(int groupPosition){ 
     return groupPosition; 
    } 


    public override View GetGroupView(int groupPosition, bool isExpanded, View convertView, ViewGroup parent){ 
     string headerTitle = (string)GetGroup(groupPosition); 

     convertView = convertView ? ? _context.LayoutInflater.Inflate(Resource.Layout.HeaderCustomLayout, null); 
     var lblListHeader = (TextView)convertView.FindViewById(Resource.Id.Header); 

     //string headerTitle2 = (string)GetGroup(groupPosition); 
     //var ListHeader2 = (TextView)convertView.FindViewById(Resource.Id.Header2); 
     //ListHeader2.Text = headerTitle2; 

     lblListHeader.Text = headerTitle; 

     return convertView; 
    } 


    public override int GroupCount{ 
     get{ 
      return _listDataHeader.Count; 
     } 
    } 


    public override bool HasStableIds{ 
     get{ 
      return false; 
     } 
    } 


    public override bool IsChildSelectable(int groupPosition, int childPosition){ 
     return true; 
    } 
} 

Answer 1

您可以使用listView.SetOnChildClickListener()删除您的孩子查看下面的代码：

public class MainActivity : Activity , IOnChildClickListener 
    { 
     ExpandableListView listView; 
     List<Data> newDataList; 
     ExpandableDataAdapter myadapter; 
     public bool OnChildClick(ExpandableListView parent, View clickedView, int groupPosition, int childPosition, long id) 
     {  
      newDataList.RemoveAt(0); 
      myadapter.NotifyDataSetChanged(); 
      return true; 
     } 

     protected override void OnCreate (Bundle bundle) 
     { 
      base.OnCreate (bundle); 
      SetContentView (Resource.Layout.Main);  
      newDataList = Data.SampleData(); 
      myadapter = new ExpandableDataAdapter(this, newDataList); 
      listView = FindViewById<ExpandableListView> (Resource.Id.myExpandableListview); 
      listView.SetAdapter (myadapter); 
      listView.SetOnChildClickListener(this); 


     } 
    } 

在我的示例，我只是删除了孩子的第一个项目，您可以使用int groupPosition, int childPosition来获得当前您点击的位置。并将其从您的listData中删除。请记住，在更改数据集时请致电adapter.NotifyDataSetChanged();。

我现在用的是ExpandableListView样品从github

屏幕截图：