自定义ListView适配器-优快云博客

本文链接：https://blog.youkuaiyun.com/haodada520/article/details/53728976

本文介绍了一个基于Android平台的自定义ListView适配器实现方法。该适配器使用BaseAdapter进行扩展，并通过XUtils库加载图片资源。文章展示了如何在构造函数中初始化数据源和上下文，以及如何在getView()方法中实现视图缓存，从而提高列表滚动的流畅度。

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package com.bwie.xlistview;

import java.util.List;

import com.bwie.bean.Data;
import com.lidroid.xutils.BitmapUtils;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class MyAdapter extends BaseAdapter {

private List<Data> list;
private Context context;

public MyAdapter(List<Data> list, Context context) {
this.list = list;
// TODO Auto-generated constructor stub
this.context = context;
}

@Override
public int getCount() {
// TODO Auto-generated method stub
return list.size();
}

@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}

@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHordle hordle;
if(convertView==null){
convertView=View.inflate(context, R.layout.item,null);
hordle=new ViewHordle();
hordle.textView=(TextView) convertView.findViewById(R.id.textView1);
hordle.imageView=(ImageView) convertView.findViewById(R.id.imageView1);
convertView.setTag(hordle);
}else{
hordle=(ViewHordle) convertView.getTag();
}
BitmapUtils bitmapUtils=new BitmapUtils(context);
Data data = list.get(position);
bitmapUtils.display(hordle.imageView,data.pic_url);
hordle.textView.setText(data.news_title);
return convertView;
}
class ViewHordle{
TextView textView;
ImageView imageView;
}
}

一些高级代码2