Android ExpandableListView单选以及多选实现代码

一、概述

ExpandableListView是常用的一个控件，今天自己做了个小练习，主要需求是单选以及多选的实现，看似比较简单，但是还是比较复杂，把代码贴给大家，有这种需求的可以参考一下。

二、效果截图

三、实现过程

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"
  tools:context=".MainActivity" >

  <ExpandableListView
    android:id="@+id/exlistview"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:listSelector="@android:color/transparent" >
  </ExpandableListView>

</LinearLayout>

group_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:descendantFocusability="blocksDescendants"
  android:padding="10dp" >

  <TextView
    android:id="@+id/id_group_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerVertical="true"
    android:layout_marginLeft="10dp"
    android:padding="10dp"
    android:text="hao"
    android:textColor="@android:color/black"
    android:textIsSelectable="true"
    android:textSize="15sp" >
  </TextView>

  <CheckBox
    android:id="@+id/id_group_checkbox"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_centerVertical="true" />

</RelativeLayout>

listview_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:descendantFocusability="blocksDescendants"
  android:padding="10dp" >

  <TextView
    android:id="@+id/id_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerVertical="true"
    android:padding="10dp"
    android:layout_marginLeft="30dp"
    android:textColor="#55acac"
    android:textIsSelectable="true"
    android:textSize="15sp" >
  </TextView>

  <CheckBox
    android:id="@+id/id_checkbox"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:clickable="false"
    android:layout_alignParentRight="true"
    android:layout_centerVertical="true" />

</RelativeLayout>

 MainAcitivity.java

public class MainActivity extends Activity {
  private List<Map<String, String>> parentList = new ArrayList<Map<String, String>>();
  private List<List<Map<String, String>>> childData = new ArrayList<List<Map<String, String>>>();
  private ExpandableListView exListView;
  private Context context = this;
  private MyAdapter adapter;

  @Override
  protected void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    initView();
    initData();
    setListener();
  }

  /**
   * 记录正在选中的子listview的item条目 用hashset是为了去除重复值
   */
  private HashSet<String> hashSet;

  private void setListener()
  {
    exListView.setOnGroupExpandListener(new OnGroupExpandListener()
    {

      @Override
      public void onGroupExpand(int groupPosition)
      {
        //存取已选定的集合
        hashSet = new HashSet<String>();
      }
    });
    // ExpandableListView的Group的点击事件
    exListView.setOnGroupClickListener(new OnGroupClickListener()
    {

      @Override
      public boolean onGroupClick(ExpandableListView parent, View v,
          int groupPosition, long id)
      {
        // 可以写点击后实现的功能

        return false;
      }
    });
    // ExpandableListView的child的点击事件

    exListView.setOnChildClickListener(new OnChildClickListener()
    {

      @Override
      public boolean onChildClick(ExpandableListView parent, View v,
          int groupPosition, int childPosition, long id)
      {
        Map<String, String> map = childData.get(groupPosition).get(
            childPosition);
        String childChecked = map.get("isChecked");
        if ("No".equals(childChecked))
        {
          map.put("isChecked", "Yes");
          hashSet.add("选定" + childPosition);
        } else
        {
          map.put("isChecked", "No");
          if (hashSet.contains("选定" + childPosition))
          {
            hashSet.remove("选定" + childPosition);
          }
        }
        System.out.println("选定的长度==1" + hashSet.size());
        System.out.println("选定的长度==2"
            + childData.get(groupPosition).size());
        if (hashSet.size() == childData.get(groupPosition).size())
        {
          parentList.get(groupPosition).put("isGroupCheckd", "Yes");
        } else
        {
          parentList.get(groupPosition).put("isGroupCheckd", "No");
        }
        adapter.notifyDataSetChanged();
        return false;
      }
    });
  }

  // 初始化数据
  private void initData()
  {
    for (int i = 0; i < 10; i++)
    {
      Map<String, String> groupMap = new HashMap<String, String>();
      groupMap.put("groupText", "item" + i);
      groupMap.put("isGroupCheckd", "No");
      parentList.add(groupMap);
    }
    for (int i = 0; i < 10; i++)
    {
      List<Map<String, String>> list = new ArrayList<Map<String, String>>();
      for (int j = 0; j < 4; j++)
      {
        Map<String, String> map = new HashMap<String, String>();
        map.put("childItem", "childItem" + j);
        map.put("isChecked", "No");
        list.add(map);
      }
      childData.add(list);
    }
    adapter = new MyAdapter();
    exListView.setAdapter(adapter);
    exListView.expandGroup(0);
    hashSet = new HashSet<String>();
  }

  private void initView()
  {
    exListView = (ExpandableListView) findViewById(R.id.exlistview);
  }

  /**
   * 适配adapter
   */

  private class MyAdapter extends BaseExpandableListAdapter {
    @Override
    public Object getChild(int groupPosition, int childPosition)
    {
      // TODO Auto-generated method stub
      return childData.get(groupPosition).get(childPosition);
    }

    @Override
    public long getChildId(int groupPosition, int childPosition)
    {
      // TODO Auto-generated method stub
      return childPosition;
    }

    @Override
    public View getChildView(int groupPosition, int childPosition,
        boolean isLastChild, View convertView, ViewGroup parent)
    {

      ViewHolder holder = null;
      if (convertView == null)
      {
        holder = new ViewHolder();
        convertView = View.inflate(context, R.layout.listview_item,
            null);
        holder.childText = (TextView) convertView
            .findViewById(R.id.id_text);
        holder.childBox = (CheckBox) convertView
            .findViewById(R.id.id_checkbox);
        convertView.setTag(holder);
      } else
      {
        holder = (ViewHolder) convertView.getTag();
      }
      holder.childText.setText(childData.get(groupPosition)
          .get(childPosition).get("childItem"));
      String isChecked = childData.get(groupPosition).get(childPosition)
          .get("isChecked");
      if ("No".equals(isChecked))
      {
        holder.childBox.setChecked(false);
      } else
      {
        holder.childBox.setChecked(true);
      }
      return convertView;
    }

    @Override
    public int getChildrenCount(int groupPosition)
    {
      // TODO Auto-generated method stub
      return childData.get(groupPosition).size();
    }

    @Override
    public Object getGroup(int groupPosition)
    {
      return parentList.get(groupPosition);
    }

    @Override
    public int getGroupCount()
    {
      // TODO Auto-generated method stub
      return parentList.size();
    }

    @Override
    public long getGroupId(int groupPosition)
    {
      // TODO Auto-generated method stub
      return groupPosition;
    }

    @Override
    public View getGroupView(final int groupPosition,
        final boolean isExpanded, View convertView, ViewGroup parent)
    {
      ViewHolder holder = null;
      if (convertView == null)
      {
        holder = new ViewHolder();
        convertView = View.inflate(context, R.layout.group_item, null);
        holder.groupText = (TextView) convertView
            .findViewById(R.id.id_group_text);
        holder.groupBox = (CheckBox) convertView
            .findViewById(R.id.id_group_checkbox);
        convertView.setTag(holder);
      } else
      {
        holder = (ViewHolder) convertView.getTag();
      }
      holder.groupText.setText(parentList.get(groupPosition).get(
          "groupText"));
      final String isGroupCheckd = parentList.get(groupPosition).get(
          "isGroupCheckd");

      if ("No".equals(isGroupCheckd))
      {
        holder.groupBox.setChecked(false);
      } else
      {
        holder.groupBox.setChecked(true);
      }

      /*
       * groupListView的点击事件
       */
      holder.groupBox.setOnClickListener(new OnClickListener()
      {

        @Override
        public void onClick(View v)
        {
          CheckBox groupBox = (CheckBox) v
              .findViewById(R.id.id_group_checkbox);
          if (!isExpanded)
          {
            //展开某个group view
            exListView.expandGroup(groupPosition);
          } else
          {
            //关闭某个group view
            exListView.collapseGroup(groupPosition);
          }

          if ("No".equals(isGroupCheckd))
          {
            exListView.expandGroup(groupPosition);
            groupBox.setChecked(true);
            parentList.get(groupPosition).put("isGroupCheckd",
                "Yes");
            List<Map<String, String>> list = childData
                .get(groupPosition);
            for (Map<String, String> map : list)
            {
              map.put("isChecked", "Yes");
            }
          } else
          {
            groupBox.setChecked(false);
            parentList.get(groupPosition)
                .put("isGroupCheckd", "No");
            List<Map<String, String>> list = childData
                .get(groupPosition);
            for (Map<String, String> map : list)
            {
              map.put("isChecked", "No");
            }
          }
          notifyDataSetChanged();
        }
      });
      return convertView;
    }

    @Override
    public boolean hasStableIds()
    {
      return true;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition)
    {
      return true;
    }

  }

  private class ViewHolder {
    TextView groupText, childText;
    CheckBox groupBox, childBox;
  }
}

四、总结及注意点

1、设置CheckBox的点击事件，而非别的

2、exListView.collapseGroup(groupPosition); 关闭正展开的子ListView.

这是demo地址，欢迎下载：

Demo下载地址

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。

原文链接：https://blog.csdn.net/Hello201404/article/details/48546387