android listadapter

Question

protected void onListItemClick(ListView l, View v, int position, long id) {
    // TODO Auto-generated method stub
    super.onListItemClick(l, v, position, id);      
    Cursor c = (Cursor) mAdapter.getItem(position);     
    String a = c.getString(c.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));      
    String b = c.getString(c.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

    if (names != null)
    {
        if(numbers.contains(b))
        {
            names = names.replace(a+";", "");
            numbers = numbers.replace(b+";", "");
            v.setBackgroundResource(R.drawable.background);             
        }
        else{
            names = names + a + ";";
            numbers = numbers + b + ";";
            v.setBackgroundResource(R.drawable.background_sel);
        }
    }
    else
    {
        names = a+";";
        numbers = b+";";
        v.setBackgroundResource(R.drawable.background_sel);
    }   
}

当我随机选择一个项目时，其他项目的背景也会发生变化，尽管它们没有添加到数组名称和编号中。

我只需要所选项目的背景就可以更改...有没有办法在不创建自己的listadapter的情况下做到这一点？

Answer 1

您应该查看状态列表可绘制项，它允许您为每种可能的状态(焦点、选定、按下等)定义不同的可绘制项。

https://developer.android.com/guide/topics/resources/drawable-resource.html#StateList