• 用SimpleAdapter来设置ListView的内容


    Mainactivit.java

     1 package com.kale.listview;
     2 
     3 import java.util.ArrayList;
     4 import java.util.HashMap;
     5 import java.util.List;
     6 import java.util.Map;
     7 
     8 import android.app.Activity;
     9 import android.os.Bundle;
    10 import android.view.View;
    11 import android.widget.AdapterView;
    12 import android.widget.AdapterView.OnItemClickListener;
    13 import android.widget.AdapterView.OnItemSelectedListener;
    14 import android.widget.ListView;
    15 import android.widget.SimpleAdapter;
    16 
    17 public class MainActivity extends Activity {
    18     
    19     ListView myLv;
    20     
    21     @Override
    22     protected void onCreate(Bundle savedInstanceState) {
    23         super.onCreate(savedInstanceState);
    24         setContentView(R.layout.activity_main);
    25         
    26         myLv = (ListView)findViewById(R.id.red_listView_id);
    27         //定义5个人名数组,5个性别数组,5个图片(图省事,我用一个图片代替了)
    28         final String []name = {"Jack","Tony","Tom","Luna","Nacy"};
    29         String []sex = {"male","male","male","female","female"};
    30         int []pic = {R.drawable.kale,R.drawable.kale,R.drawable.kale,R.drawable.kale,R.drawable.kale};
    31         
    32         //建立一个list,里面的元素师Map,Map中是String,object
    33         List<Map<String, Object>> list = new ArrayList<Map<String,Object>>();
    34         for (int i = 0; i < name.length; i++) {
    35             //建立list中的子元素,用键值对的形式来存放数据
    36             Map<String, Object> listItem = new HashMap<String, Object>();
    37             listItem.put("picture", pic[i]);
    38             listItem.put("name", name[i]);
    39             listItem.put("sex", sex[i]);
    40             //将子元素添加入list中
    41             list.add(listItem);
    42         }
    43         
    44         //建立一个simpleAdapter
    45         //1.Context对象,2.list对象,3.item的布局文件,4.各个元素来源的键名,5.各个元素对应控件的id
    46         SimpleAdapter adapter = new SimpleAdapter(this, list, R.layout.item, 
    47                 new String[] {"picture","name","sex"}, 
    48                 new int[] {R.id.pic_imageView_id,R.id.name_textView_id,R.id.sex_textView_id});
    49         
    50         myLv.setAdapter(adapter);
    51         myLv.setOnItemClickListener(new OnItemClickListener() {
    52 
    53             @Override
    54             public void onItemClick(AdapterView<?> arg0, View parent, int position,long id) {
    55                 // TODO 自动生成的方法存根
    56                 System.out.println("onItemClick"+name[position]+"被选中了");
    57                 
    58             }
    59         });
    60         //列表项被选中后的监听器,两个监听器的区别参考这篇文章:http://blog.csdn.net/bcai2/article/details/15028979
    61         //就和电视的菜单一样,上下选择来触发选中(selected)事件,按下确定才是点击(click)事件。
    62         myLv.setOnItemSelectedListener(new OnItemSelectedListener() {
    63 
    64             @Override
    65             public void onItemSelected(AdapterView<?> parent, View arg1,int position, long id) {
    66                 // TODO 自动生成的方法存根
    67                 System.out.println("onItemSelected"+name[position]+"被选中了");
    68             }
    69 
    70             @Override
    71             public void onNothingSelected(AdapterView<?> arg0) {
    72                 // TODO 自动生成的方法存根
    73                 
    74             }
    75         });
    76     }
    77 }

    activity_main.xml

    <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" >
    
        <!-- 设置红色分割线的listView -->
        <ListView 
            android:id="@+id/red_listView_id"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:divider="#f00"
            android:dividerHeight="2dp"
            android:layout_gravity="center"
            android:headerDividersEnabled="false"/>
        
    
    </LinearLayout>

    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="wrap_content"
        android:orientation="horizontal" >
    
        <ImageView
            android:id="@+id/pic_imageView_id"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_launcher" />
    
        <TextView
            android:id="@+id/name_textView_id"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Large Text"
            android:layout_marginLeft="10dp"
            android:layout_gravity="center_vertical"
            android:textAppearance="?android:attr/textAppearanceLarge" />
    
        <TextView
            android:id="@+id/sex_textView_id"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="10dp"
            android:textColor="#0000ff"
            android:text="Small Text"
            android:textAppearance="?android:attr/textAppearanceSmall" />
    
    </LinearLayout>
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  • 原文地址:https://www.cnblogs.com/tianzhijiexian/p/3850988.html
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