Android学习之ListView的优化01

最新推荐文章于 2025-11-24 15:06:53 发布

原创最新推荐文章于 2025-11-24 15:06:53 发布 · 228 阅读

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#android #listview #优化

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本文介绍了一种提高Android应用中ListView滚动性能的方法，通过重用convertView和创建ViewHolder内部类来减轻内存负担并提升用户体验。

Listview的优化：
1.重用convertView
2.编写ViewHolder内部类

public View getView(int i, View convertView, ViewGroup viewGroup) {
        ViewHolder viewHolder = null;
        View view;
        if(convertView==null)
        {
            viewHolder = new ViewHolder();
            view = View.inflate(mContext,R.layout.item_list,null);
            viewHolder.mImageView = (ImageView) view.findViewById(R.id.id_iv);
            viewHolder.mTextViewDes = (TextView) view.findViewById(R.id.id_tv_description);
            viewHolder.getmTextViewPrice = (TextView) view.findViewById(R.id.id_tv_price);
            view.setTag(viewHolder);
        }else{
            view = convertView;
            viewHolder = (ViewHolder) view.getTag();
        }
        viewHolder.mImageView.setImageResource(mList.get(i).image);
        viewHolder.mTextViewDes.setText(mList.get(i).des);
        viewHolder.getmTextViewPrice.setText(mList.get(i).price);
        return view;
    }
    class ViewHolder{
        public ImageView mImageView;
        public TextView mTextViewDes;
        public TextView getmTextViewPrice;
    }