ListView优化

// 返回视图,这个方法很主要
    public View getView(int position, View arg, ViewGroup arg2) {
        View view = null;
        
　　　　//判断是否有缓存，如果没有填充布局，有的话利用缓存。不管是缓存还是新获取的都要重新设置内容
　　　　if(arg==null){
            
            view = View.inflate(context, R.layout.lisviewt_item1, null);
        }else{
            view = arg;
        }
        
        FriendBean fb = data.get(position);
        ImageView img = (ImageView) view.findViewById(R.id.iv);
        TextView name = (TextView) view.findViewById(R.id.tv_1);
        TextView gexing = (TextView) view.findViewById(R.id.tv_2);
        img.setImageResource(fb.getImgID());
        name.setText(fb.getName());
        gexing.setText(fb.getGexing());
        return view;
    }