Android 之 ListView使用BaseAdapter展示列表

simpleitem.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <TextView
        android:id="@+id/id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:layout_weight="2" />

    <TextView
        android:id="@+id/name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="left"
        android:layout_weight="10"/>

    <TextView
        android:id="@+id/age"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_weight="3"/>

</LinearLayout>

BaseAdapterDemo.java

package com.example.phonedemo;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.example.phonedemo.util.Utils;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class BaseAdapterDemo extends Activity {

    private ListView listView = null;
    private LinearLayout layout = null;
    private MyBaseAdapter adapter = null;

    /**
     * 功能：静态类，优化list
     * 
     * @author qinxijuan
     * 
     */
    static class ViewHolder {
        TextView id = null;
        TextView name = null;
        TextView age = null;
    }

    class MyBaseAdapter extends BaseAdapter {

        public List<Map<String, Object>> list = null;
        private LayoutInflater lif = null;

        public MyBaseAdapter(List<Map<String, Object>> l, Context context) {
            this.list = l;
            this.lif = LayoutInflater.from(context);
        }

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

        @Override
        public Object getItem(int arg0) {
            // TODO Auto-generated method stub
            return null;
        }

        @Override
        public long getItemId(int arg0) {
            // TODO Auto-generated method stub
            return 0;
        }

        @Override
        public View getView(int postion, View convertView, ViewGroup parent) {
            ViewHolder holder = null;
            if (convertView == null) {
                holder = new ViewHolder();
                convertView = lif.inflate(R.layout.simpleitem, null);
                holder.id = (TextView) convertView.findViewById(R.id.id);
                holder.name = (TextView) convertView.findViewById(R.id.name);
                holder.age = (TextView) convertView.findViewById(R.id.age);
                convertView.setTag(holder);
            } else {
                holder = (ViewHolder) convertView.getTag();
            }
            holder.id.setText(this.list.get(postion).get("id").toString());
            holder.name.setText(this.list.get(postion).get("name").toString());
            holder.age.setText(this.list.get(postion).get("age").toString());
            return convertView;
        }

    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        this.layout = new LinearLayout(this);
        this.layout.setOrientation(LinearLayout.VERTICAL);
        this.listView = new ListView(this);
        this.adapter = new MyBaseAdapter(initList(), this);
        this.listView.setAdapter(this.adapter);
        this.listView.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1,
                    int position, long arg3) {
                // TODO Auto-generated method stub
                Toast.makeText(
                        BaseAdapterDemo.this,
                        "您选择了："
                                + BaseAdapterDemo.this.adapter.list
                                        .get(position).get("id").toString(),
                        Toast.LENGTH_SHORT).show();
            }
        });
        this.layout.addView(this.listView, Utils.match);
        super.addContentView(this.layout, Utils.match);
    }

    private List<Map<String, Object>> initList() {
        List<Map<String, Object>> temp = new ArrayList<Map<String, Object>>();
        Map<String, Object> map = null;
        for (int i = 0; i < 20; i++) {
            map = new HashMap<String, Object>();
            map.put("id", i);
            map.put("name", "张三" + i + "号");
            map.put("age", 28);
            map.put("email", "zhangsan@163.com");
            temp.add(map);
        }
        return temp;
    }

}