如何在选定的特定项目下方显示列表？

Question

我正在动态listview显示下面perticular项selected.can任何人建议我怎么可能？我在这里证实了快照。

我做了如下的代码。

root.setOnClickListener(new OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       // im++; 

       final ListPopupWindow listPopupWindow = new ListPopupWindow(getActivity()); 
       ArrayList<String> a=new ArrayList<String>(); 
       a.add("a"); 
       a.add("b"); 
       listPopupWindow.setAdapter(new ArrayAdapter(
         getActivity(), 
         R.layout.raw_comment,a.size())); 
       listPopupWindow.setAnchorView(v); 
       listPopupWindow.show(); 
       //showAlertDialog(getActivity(), "List display 1"); 
      } 
     }); 

你的回答将不胜感激

Answer 1

试试这个

final ListPopupWindow listPopupWindow = new ListPopupWindow(
        context); 
      listPopupWindow.setAdapter(new ArrayAdapter(
        context, 
        R.layout.list_row_layout, arrayOfValues)); 
      listPopupWindow.setAnchorView(your_view); 
      listPopupWindow.setWidth(300); 
      listPopupWindow.show(); 

Answer 2

〔实施例：

findViewById(R.id.btn).setOnTouchListener(new OnTouchListener() { 
    @Override 
    public boolean onTouch(View v, MotionEvent event) { 

     //use MotionEvent event : getX() and getY() will return your pressing 
     location in the button. 
    } 
});