简单适配器结合ListView控件的使用

  这里介绍简单适配器和ListView控件的结合使用。

一、建立工程，如图

一、Activity_main.xml中代码

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
     >

    <LinearLayout 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >
        <TextView 
            android:id="@+id/pname"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="3dp"
            android:layout_weight="1"
            android:textSize="15sp"
            android:text="产品名称"
            
            />
        <TextView 
            android:id="@+id/price"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="3dp"
            android:layout_weight="1"
            android:text="产品价格"
            android:textSize="15sp"
            />
        <TextView 
            android:id="@+id/address"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="3dp"
            android:layout_weight="1"
            android:text="产品产地"
            android:textSize="15sp"
            />
        
    </LinearLayout>
    
    <ListView 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/listview"
        ></ListView>

</LinearLayout>

二、MyDataSource.java中代码

package com.study.listview2;

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

public class MyDataSource {

    
    public static List<Map<String, String>> getDataSource(){
        List<Map<String, String>> data = new ArrayList<Map<String,String>>();
        Map<String, String> map1 = new HashMap<String, String>();
        map1.put("pname", "西瓜");
        map1.put("price", "￥2.3");
        map1.put("address", "海南");
        Map<String, String> map2 = new HashMap<String, String>();
        map2.put("pname", "香蕉");
        map2.put("price", "￥6.3");
        map2.put("address", "广西");
        Map<String, String> map3 = new HashMap<String, String>();
        map3.put("pname", "苹果");
        map3.put("price", "￥5.1");
        map3.put("address", "贵州");
        data.add(map1);
        data.add(map2);
        data.add(map3);
        return data;        
    }
}

三、MainActivity.java中代码

package com.study.listview2;

import java.util.List;
import java.util.Map;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.ListView;
import android.widget.SimpleAdapter;

public class MainActivity extends Activity {

    private ListView listView;
    private SimpleAdapter adapter;
    private List<Map<String, String>> data = null;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        listView = (ListView)this.findViewById(R.id.listview);
        data = MyDataSource.getDataSource();
        adapter = new SimpleAdapter(MainActivity.this, data, R.layout.activity_main, new String[]{"pname","price","address"}, new int[]{R.id.pname,R.id.price,R.id.address});
        listView.setAdapter(adapter);
        
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    
}

四、效果图