Android--ListView和SimpleAdapter

一、File：MainActivity.java

package com.jiangge.simpleadapterdemo;

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;
import android.widget.SimpleAdapter;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		ListView listView = (ListView) findViewById(R.id.list_view);
		List<Map<String, Object>> data = new ArrayList<Map<String,Object>>();
		
		Map<String, Object> map1 = new HashMap<String, Object>();
		map1.put("nametext","这是第一个功能--帮助");
		map1.put("iconid",R.drawable.help);
		
		Map<String, Object> map2 = new HashMap<String, Object>();
		map2.put("nametext","这是第二个功能--查找");
		map2.put("iconid",R.drawable.search);
		
		Map<String, Object> map3 = new HashMap<String, Object>();
		map3.put("nametext","这是第三个功能--帮助");
		map3.put("iconid",R.drawable.collections);
		
		data.add(map1);
		data.add(map2);
		data.add(map3);
		//Context context, List<? extends Map<String, ?>> data,int resource, String[] from, int[] to)
		listView.setAdapter(new SimpleAdapter(this, data, R.layout.list_item, new String[]{"nametext","iconid"}, new int[]{R.id.text_view,R.id.image_view}));
	}


}

注：SimpleAdapter(Context context, List<? extends Map<String, ?>> data,int resource, String[] from, int[] to) 参数的意义

参数意义：

data --> 绑定的数据，list集合

R.layout.list_item --> 数据显示对应的布局

要记数据和 view 对象建立一个映射关系

from [] --> map集合里的数据 key

to [] --> 布局文件里面的 id

二、布局文件：

res/layout/activity_main.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="vertical" >

    <ListView
        android:id="@+id/list_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </ListView>

</LinearLayout>

res/layout/list_item.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" >

    <ImageView
        android:id="@+id/image_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/text_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

三、效果图：

项目结构图片：