ExpandableListView箭头右边显示方法

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1首先 ExpandableListView elistview;

elistview.setGroupIndicator(null);//将控件默认的左边箭头去掉，

2在自定义的继承自BaseExpandableListAdapter的adapter中有一个方法

/**
* 父类view
*/
    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
            View convertView, ViewGroup parent) {
        Log.i("zhaoxiong","parent view");
            LinearLayout parentLayout=(LinearLayout) View.inflate(context, R.layout.wowocoupons_parent_item, null);
            TextView parentTextView=(TextView) parentLayout.findViewById(R.id.parentitem);
            parentTextView.setText(parentlist.get(groupPosition));
            ImageView parentImageViw=(ImageView) parentLayout.findViewById(R.id.arrow);

//判断isExpanded就可以控制是按下还是关闭，同时更换图片
            if(isExpanded){
                parentImageViw.setBackgroundResource(R.drawable.arrow_down);
            }else{
                parentImageViw.setBackgroundResource(R.drawable.arrow_up);
            }

        return parentLayout;
    }

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