package com.example.android_listview;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import android.os.Bundle;

import android.app.Activity;

import android.view.Menu;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import android.widget.SimpleAdapter;

public class MainActivity extends Activity {

private ListView listview;

private ArrayAdapter<String>arr_adapter;

private SimpleAdapter simple_adapter;

private List<Map<String, Object>>dataList;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

listview = (ListView) findViewById(R.id.listView);

String[] arr_date = {"T购1","T购2","T购3","T购4","T购5","T购6","T购7" };

//·1新建一个数据适配器

//1.上下文， 2.当前listView加载的每一个列表所对应的布局文件3.数据源

//simpleadapter

/**

* context 上下文

* date List<? extends Map<String, ?>> data 一个map所组成的list集合

* 每一个map都会都应listview列表中的一行

* 每一个map（键--值对）中的键必须包含所有在from中所指定的键

* 

* resouce: 列表项的布局文件ID

* from : Map中的键名 

* to : 绑定数据视图中的ID与from成对应关系

* 

*/

dataList = new ArrayList<Map<String, Object>>();

arr_adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, arr_date);

simple_adapter = new SimpleAdapter(this, getData(), R.layout.item, new String[]{"pic", "text"}, new int []{R.id.pic, R.id.text});

//使用师徒去加载适配器

//listview.setAdapter(arr_adapter);

listview.setAdapter(simple_adapter);

}

private List<Map<String, Object>> getData(){

for(int i = 0; i < 20; i++){

Map<String, Object> map = new HashMap<String, Object>();

map.put("pic", R.drawable.ic_launcher);

map.put("text", "慕课网 " + i);

dataList.add(map);

}

return dataList;

}

}