android的listview+BaseAdapter的例子

准备一个listview的xml，绑定到activity里面的listView的变量

准备一个继承自BaseAdapter的的MyAdapter，构造函数里面传入一个datasource的array，一个context，一般为绑定listview的activity（用来把item的xml实例化为layout）

准备一个数据模型，可以用hashmap，也可以用list

MainActivity.java

package com.example.testapp;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends Activity {

    private List<ObjectEntity> dataSource;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
//        initListView();
        initGridView();
    }
    
    private void initListView() {
        
        setContentView(R.layout.activity_list_main);
        ListView listView = (ListView)findViewById(R.id.listView1);
        
        dataSource = new ArrayList<ObjectEntity>();
        
        for (int i = 0; i < 10; i++) {
            ObjectEntity object = new ObjectEntity();
            
            object.imgUrl = "http://a.hiphotos.baidu.com/album/w%3D2048/sign=3da6584ff2deb48ffb69a6dec4273b29/960a304e251f95ca11945098c8177f3e670952bf.jpg";
            object.desc = "这是list描述信息";
            
            dataSource.add(object);
        }
                
        MyAdapter myAdapter = new MyAdapter(dataSource,MainActivity.this);
        listView.setAdapter(myAdapter);
        
        listView.setOnItemClickListener(new OnItemClickListener() {
        
            public void onItemClick(AdapterView<?> parent, View view, int position, long id)
            {
                ObjectEntity data = dataSource.get(position);
                
                Toast.makeText(getApplicationContext(),  
                        data.desc, 
                        Toast.LENGTH_SHORT).show(); 
            }
        });
    }
    
    private void initGridView() {

        setContentView(R.layout.ctivity_grid_main);
        GridView gridView = (GridView)findViewById(R.id.gridView1);
        
        dataSource = new ArrayList<ObjectEntity>();
        
        for (int i = 0; i < 10; i++) {
            ObjectEntity object = new ObjectEntity();
            
            object.imgUrl = "http://a.hiphotos.baidu.com/album/w%3D2048/sign=3da6584ff2deb48ffb69a6dec4273b29/960a304e251f95ca11945098c8177f3e670952bf.jpg";
            object.desc = "这是grid描述信息";
            
            dataSource.add(object);
        }
    
        MyAdapter myAdapter = new MyAdapter(dataSource,MainActivity.this);
        gridView.setAdapter(myAdapter);
        
        gridView.setOnItemClickListener(new OnItemClickListener() {
            
            public void onItemClick(AdapterView<?> parent, View view, int position, long id)
            {
                ObjectEntity data = dataSource.get(position);
                
                Toast.makeText(getApplicationContext(),  
                        data.desc, 
                        Toast.LENGTH_SHORT).show(); 
            }
        });
    }
}

MyAdapter.java

package com.example.testapp;
import java.util.List;

import net.tsz.afinal.FinalBitmap;
import android.app.Activity;
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;


public class MyAdapter extends BaseAdapter {

    private FinalBitmap fb;
    
    private List<ObjectEntity> dataSourceArray;
    private Context activityContext;
    
    public MyAdapter(List<ObjectEntity> dataSource,Context context) {
        // TODO Auto-generated constructor stub
        
        this.dataSourceArray = dataSource;
        this.activityContext = context;
        
        fb = FinalBitmap.create(context);//初始化FinalBitmap模块
    }

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

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

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        
        ObjectEntity data = dataSourceArray.get(position);
        
        if ( null == convertView )
        {
            LayoutInflater inflater = ((Activity)activityContext).getLayoutInflater();
            convertView = inflater.inflate(R.layout.item, null);
            
            ImageView imgView = (ImageView)convertView.findViewById(R.id.listitem_pic);
            
            //AFinal很好很强大
            fb.configLoadingImage(R.drawable.ic_launcher);
            fb.display(imgView,data.imgUrl);
        }
        
        TextView info = (TextView)convertView.findViewById(R.id.listitem_title);
        info.setText(data.desc);
        
        return convertView;
    }
}

ObjectEntity.java

package com.example.testapp;

public class ObjectEntity {

    public String imgUrl;
    public String desc;
}