BaseAdapter简单用法

package com.example.baseadapter;
import java.util.List;
import java.util.Map;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

public class MyListAdapter extends BaseAdapter {
	private LayoutInflater inflater = null;
	private Context context = null;
	private List> listdata = null;

	/*
	 * 一行元素
	 */
	public final class ListItem {
		public ImageView icon;
		public TextView name;
		public Button but;
	}

	public MyListAdapter(Context ui, List> listdata) {
		this.context = ui;
		this.inflater = LayoutInflater.from(this.context);
		this.listdata = listdata;
	}

	@Override
	public int getCount() {
		return listdata.size();
	}

	@Override
	public Object getItem(int position) {
		return position;
	}

	@Override
	public long getItemId(int position) {
		return position;
	}

	/*
	 * 这是渲染的重点，包括行内的点击事件也需要在这里定义
	 */
	@Override
	public View getView(int position, View v, ViewGroup parent) {
		// 初始化一行元素,这里也有部分优化
		ListItem listitem = null;
		if (v == null) {
			v = inflater.inflate(R.layout.listitem, null);
			listitem = new ListItem();
			listitem.icon = (ImageView) v
					.findViewById(R.id.image);
			listitem.name = (TextView) v
					.findViewById(R.id.text);
			listitem.but = (Button) v
					.findViewById(R.id.button);
			v.setTag(listitem);
		} else {
			listitem = (ListItem) v.getTag();
		}
		// 填充数据
		listitem.name.setText(listdata.get(position).get("name").toString());
		listitem.but.setText(listdata.get(position).get("but").toString());
		listitem.icon.setImageResource(Integer.parseInt(listdata.get(position).get("icon").toString()));
		return v;
	}

}

package com.example.baseadapter;

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

import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;

public class BaseActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.baseactivity);
		ListView lv = (ListView) findViewById(R.id.listview1);
        List> list = new ArrayList>();
        for (int i = 0; i < 5; i++) {
            Map m = new HashMap();
            m.put("name", "Text" + i);
            m.put("icon", R.drawable.f001);
            m.put("but", "Button" + i);
            list.add(m);
        }
        MyListAdapter adapter = new MyListAdapter(
        		this,//listview的运行环境界面上下文
        		list
        		);
        lv.setAdapter(adapter);
	}

}