• Android ExpandableListView的简单应用


    Expandablelistview1Activity.java

    package com.wangzhu.demoexpandablelistview;
    
    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.ExpandableListView;
    import android.widget.SimpleExpandableListAdapter;
    
    public class Expandablelistview1Activity extends Activity {
    
        private ExpandableListView expandableListView1;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.expandablelistview1);
    
            init();
        }
    
        private void init() {
            expandableListView1 = (ExpandableListView) findViewById(R.id.expandableListView1);
            getDatas();
        }
    
        private void getDatas() {
            // 创建两个一级条目标题
            Map<String, String> title_1 = new HashMap<String, String>();
            title_1.put("group", "移动开发");
            Map<String, String> title_2 = new HashMap<String, String>();
            title_2.put("group", "男人的需求");
    
            // 创建一级条目容器
            List<Map<String, String>> groups = new ArrayList<Map<String, String>>();
            groups.add(title_1);
            groups.add(title_2);
    
            // 创建二级条目内容
    
            // 内容一
            Map<String, String> content_1 = new HashMap<String, String>();
            content_1.put("child", "Android");
            Map<String, String> content_2 = new HashMap<String, String>();
            content_2.put("child", "Ios");
    
            List<Map<String, String>> childs_1 = new ArrayList<Map<String, String>>();
            childs_1.add(content_1);
            childs_1.add(content_2);
    
            // 内容二
            Map<String, String> content_3 = new HashMap<String, String>();
            content_3.put("child", "金钱");
            Map<String, String> content_4 = new HashMap<String, String>();
            content_4.put("child", "权利");
            Map<String, String> content_5 = new HashMap<String, String>();
            content_5.put("child", "女人");
    
            List<Map<String, String>> childs_2 = new ArrayList<Map<String, String>>();
            childs_2.add(content_3);
            childs_2.add(content_4);
            childs_2.add(content_5);
    
            // 存放两个内容,以便显示在列表中
            List<List<Map<String, String>>> childs = new ArrayList<List<Map<String, String>>>();
            childs.add(childs_1);
            childs.add(childs_2);
    
            /**
             * 参数1:上下文对象context 参数2:一级条目目录集合 参数3:一级条目对应的布局文件
             * 参数4:fromto,就是map中的key,指定要显示的对象 参数5:与参数4对应,指定要显示在groups中的id
             * 参数6:二级条目目录集合 参数7:二级条目对应的布局文件 参数8:fromto,就是map中的key,指定要显示的对象
             * 参数9:与参数8对应,指定要显示在childs中的id
             */
            SimpleExpandableListAdapter adapter = new SimpleExpandableListAdapter(
                    this, groups, R.layout.expandablelistview1_groups,
                    new String[] { "group" }, new int[] { R.id.textGroup }, childs,
                    R.layout.expandablelistview1_child, new String[] { "child" },
                    new int[] { R.id.textChild });
            expandableListView1.setAdapter(adapter);
        }
    
    }

    expandablelistview1.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" >
    
        <ExpandableListView
            android:id="@+id/expandableListView1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" >
        </ExpandableListView>
    
    </LinearLayout>

    expandablelistview1_groups.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" >
    
        <TextView
            android:id="@+id/textGroup"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:paddingBottom="6dp"
            android:paddingLeft="40dp"
            android:paddingTop="6dp"
            android:text="No data"
            android:textSize="15sp" />
    
    </LinearLayout>

    expandablelistview1_child.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" >
    
        <TextView
            android:id="@+id/textChild"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:paddingBottom="10dp"
            android:paddingLeft="40dp"
            android:paddingTop="10dp"
            android:text="No data"
            android:textSize="20sp" />
    
    </LinearLayout>

    备注:

    简单的应用,网上导出都可见,理论就不写了,直接源码吧!

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  • 原文地址:https://www.cnblogs.com/xiaoxian1369/p/3694253.html
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