Android:ListViewAdapter

package com.wyl.listview;

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.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;

public class MainActivity extends Activity {
	ListView listview;
	ListAdapter adapter;
	ListAdapter la;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        init();
        
    }
	private void init() {
		listview = (ListView) findViewById(R.id.listview01);
////		adapter.a
//		//数据源，
//		//1.新建适配器
//		//
//		String[] a = {"the first","the second","第三个","张雅岚"};
////		List<String> b = new ArrayList<String>();
////		b.add("张雅岚");
////		b.add("wyl");
//		adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, a);
//		listview.setAdapter(adapter);
		
		
		
//		
//		String[] c = {"one","two","three","four"};
//		adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1 , c);
//		System.out.println("=============");
//		listview.setAdapter(adapter);
//		la = new SimpleAdapter(this, getData(), resource, from, to)
		
//		
//		public SimpleAdapter (Context context, List<? extends Map<String, ?>> data, int resource, String[] from, int[] to)
//
//		Added in API level 1
//		Constructor
//
//		Parameters
//		context	The context where the View associated with this SimpleAdapter is running
//		data		  A List of Maps. Each entry in the List corresponds to one row in the list. 
//				    The Maps contain the data for each row, and should include all the entries specified in "from"
//		resource	  Resource identifier of a view layout that defines the views for this list item. The layout 
//					file should include at least those named views defined in "to"
//		from	     A list of column names that will be added to the Map associated with each item.
//		to	          The views that should display column in the "from" parameter. These should all be TextViews. 
//					The first N views in this list are given the values of the first N columns in the from parameter.
		
		la = new SimpleAdapter(this,getData(),R.layout.item,new String[]{"pic","text"},new int[]{R.id.pic,R.id.text});
		
		listview.setAdapter(la);
		
		
		
		
		
		
		
	}
	private List<Map<String, Object>> getData() {
		
		List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
		Map map = new HashMap<String,Object>();
		for(int i=0;i<10;i++){
			map.put("pic", R.drawable.ic_launcher);
			map.put("text", "wyl"+i);
			System.out.println("i:"+i);
			list.add(map);
			
		}
		
		return list;
		
	}

    
}

<?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" >
    <ImageView 
        android:id="@+id/pic"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="15dp"
        android:src="@drawable/ic_launcher"
        />
	<TextView 
	    android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        
        android:textSize="20sp"
        android:textColor="#000000"
        android:text="demo"
        />
</LinearLayout>