标签：
1. 训练目标
1) 掌握ListView 控件的使用
2) 理解Adapter 的作用并掌握自定义FruitAdapter 的使用方式
2.开发步骤
1）自定义适配器MyAdapter
package cn.edu.bzu.adapter; import java.util.List; import cn.edu.bzu.entity.Information;import cn.edu.bzu.weibo_looking.R;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView; /** * 自定义Adapter实现listView的显示 * @author monster * @date : 2015-04-28 */public class MyAdapter extends BaseAdapter { private List<Information> list; private Context mContext; private LayoutInflater mInflater; //定义构造方法 public MyAdapter(List<Information> list, Context mContext) { super(); this.list = list; this.mContext = mContext; } @Override public int getCount() { return list.size(); } @Override public Object getItem(int position) { return list.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder=null; if(convertView==null){ convertView=mInflater.from(mContext).inflate(R.layout.listview_item,null); //布局转换成视图 holder=new ViewHolder(); //实例化控件 holder.Image=(ImageView)convertView.findViewById(R.id.Iv); holder.Name=(TextView)convertView.findViewById(R.id.Name); holder.Time=(TextView)convertView.findViewById(R.id.Time); holder.Contents=(TextView)convertView.findViewById(R.id.Contents); convertView.setTag(holder); //设置setTag使得程序得以优化 }else{ holder=(ViewHolder) convertView.getTag(); } //给控件赋值 holder.Image.setBackgroundResource(list.get(position).getImgId()); holder.Name.setText(list.get(position).getName()); holder.Time.setText(list.get(position).getDate()); holder.Contents.setText(list.get(position).getContent()); return convertView; } class ViewHolder{ ImageView Image; TextView Name; TextView Time; TextView Contents; }}package cn.edu.bzu.weibo_looking;
import java.util.ArrayList;import java.util.List; import cn.edu.bzu.adapter.MyAdapter;import cn.edu.bzu.entity.Information;import android.os.Bundle;import android.widget.ListView;import android.app.Activity; public class MainActivity extends Activity { private ListView listView; private MyAdapter adapter; private List<Information> list; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); setData();//数据源 initView(); } private void initView() { // 初始化控件 listView=(ListView) findViewById(R.id.Lv); listView.setAdapter(adapter); //绑定适配器 } private void setData() { // 设置数据源 list=new ArrayList<Information>(); list.add(new Information(R.drawable.img1,"小白","2015-04-06","Lalala德玛西亚")); list.add(new Information(R.drawable.img2, "小明", "2015-05-06", "今天上班好累")); list.add(new Information(R.drawable.img3,"小红","2015-05-06","交个朋友吧")); list.add(new Information(R.drawable.img4,"小g","2015-05-06","快期中考试了，看来得好好学习了！")); list.add(new Information(R.drawable.img5,"大白","2015-05-06","妹子，约嘛~")); list.add(new Information(R.drawable.img6, "小Q", "2015-05-06", "啦啦啦")); list.add(new Information(R.drawable.img7, "涂涂", "2015-05-06", "好想吃炸小丸子哦")); list.add(new Information(R.drawable.img8, "小丸子", "2015-05-06", "为什么要吃我")); adapter=new MyAdapter(list, MainActivity.this); } }标签：
原文地址：http://www.cnblogs.com/zhengyuqi/p/4506186.html
