在可扩展ListView Android中更改单击子项的背景颜色

Question

I want to change the background color of the child which is clicked in an ExpandableListView. That is, when any child is clicked, it's background color should get changed. I am trying to go it in this way but it selects some other row, not the one which has been clicked.

public boolean onChildClick(ExpandableListView parent, View v,
        int groupPosition, int childPosition, long id) {

    parent.getChildAt(childPosition).setBackgroundColor(Color.DKGRAY);

    return false;
}

Please tell me what I might be missing.

Answer 1

This is how I solved it.

View _lastColored;
public boolean onChildClick(ExpandableListView parent, View v,
        int groupPosition, int childPosition, long id) {
    _groupPosition = groupPosition;


    if(_lastColored != null)
    {
    _lastColored.setBackgroundColor(Color.TRANSPARENT);
    _lastColored.invalidate();
    }
    _lastColored = v;
    v.setBackgroundColor(Color.rgb(214, 214, 214));


    return false;
}

Answer 2

How about lets say you try to directly refer your view and set the background like this,

public boolean onChildClick(ExpandableListView parent, View v,
        int groupPosition, int childPosition, long id) {

         v.setBackgroundColor(Color.BLUE);

    return false;
}

Answer 3

I think you should use

public boolean onChildClick(ExpandableListView parent, View v,
        int groupPosition, int childPosition, long id) {


    Object obj = parent.getTag();
      if(obj instanceof View){
             ((View) obj).findViewByID(<id of main ViewGroup of row>).setBackgroundColor(Color.<your normal color>);
         }


    v.findViewByID(<id of main ViewGroup of row>).setBackgroundColor(Color.DKGRAY);


 parent.setTag(v);



    return false;
}


parent.getChildAt(childPosition).findViewByID(<id of main ViewGroup of row >).setBackgroundColor(Color.DKGRAY);

or 


v.findViewByID(<id of main ViewGroup of row>).setBackgroundColor(Color.DKGRAY);

for second one http://developer.android.com/reference/android/widget/ExpandableListView.OnChildClickListener.html#onChildClick(android.widget.ExpandableListView, android.view.View, int, int, long)