android 双层listview,ExpandableListView 双层list view的使用案例

小灰灰 2022-10-05 05:58 158阅读 0赞

首先上图看效果

布局：此处我使用的是自定义的(因为我嵌套ScrollView)你可以直接使用ExpandableListView

android:id="@+id/expend\_list"

android:layoutDirection="rtl"

android:layout\_width="match\_parent"

android:layout\_height="match\_parent">

第一层item：

xmlns:tools="http://schemas.android.com/tools"

android:orientation="vertical" android:layout\_width="match\_parent"

android:layout\_height="match\_parent">

android:id="@+id/label\_group\_normal"

android:gravity="left|center\_vertical"

android:layoutDirection="ltr"

android:layout\_width="match\_parent"

android:layout\_height="wrap\_content"

android:background="\#faf4f4"

android:paddingBottom="8dp"

android:paddingLeft="32dp"

android:paddingTop="8dp"

android:textColor="\#727272"

android:textSize="20sp"

tools:text="测试数据"/>

第二层itme

xmlns:tools="http://schemas.android.com/tools"

android:orientation="vertical" android:layout\_width="match\_parent"

android:layout\_height="match\_parent">

android:id="@+id/expand\_child"

android:layout\_width="match\_parent"

android:layout\_height="wrap\_content"

android:gravity="center"

android:textSize="16sp"

android:paddingTop="8dp"

android:paddingBottom="8dp"

tools:text="测试数据"/>

activity中的实例使用及监听

@BindView(R.id.expend\_list)

NestedExpandaleListView expend\_list;

ApplyExtendableListViewAdapter expandableAdapter;

expandableAdapter=new ApplyExtendableListViewAdapter();

expend\_list.setAdapter(expandableAdapter); //设置分组的监听

// setListViewHeight(expend\_list);

expend\_list.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() \{

@Override

public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) \{

toast\_Base(""+groupPosition);

expandableAdapter.notifyDataSetChanged();

// setListViewHeight(expend\_list);

return false;

\}); //设置子项布局监听

expend\_list.setOnChildClickListener(new ExpandableListView.OnChildClickListener() \{

@Override

public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) \{

toast\_Base(groupPosition+""+childPosition);

return true;

\});

Adapter 适配器：

package adapter;

import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseExpandableListAdapter;

import android.widget.TextView;

import com.example.administrator.hospitalproject.R;

/\*\*

\* Created by Administrator on 2019/1/14.

\*/

public class ApplyExtendableListViewAdapter extends BaseExpandableListAdapter \{

private Context mcontext;

public String\[\] groupString = \{"21", "23", "34", "45"\};

public String\[\]\[\] childString = \{ \{"12", "23", "34", "45"\}, \{"56", "67", "78", "89"\}, \{"90", "87", "67", "43"\}, \{"32", "21", "34", "34"\} \};

@Override // 获取分组的个数

public int getGroupCount() \{

return groupString.length;

\} //获取指定分组中的子选项的个数

@Override

public int getChildrenCount(int groupPosition) \{

return childString\[groupPosition\].length;

\} // 获取指定的分组数据

@Override public Object getGroup(int groupPosition) \{

return groupString\[groupPosition\];

\} //获取指定分组中的指定子选项数据

@Override

public Object getChild(int groupPosition, int childPosition) \{

return childString\[groupPosition\]\[childPosition\];

\} //获取指定分组的ID, 这个ID必须是唯一的

@Override

public long getGroupId(int groupPosition) \{

return groupPosition;

\} //获取子选项的ID, 这个ID必须是唯一的

@Override public long getChildId(int groupPosition, int childPosition) \{

return childPosition;

\} //分组和子选项是否持有稳定的ID, 就是说底层数据的改变会不会影响到它们

@Override public boolean hasStableIds() \{

return true;

/\*\*

\* 获取显示指定组的视图对象

\* @param groupPosition 组位置

\* @param isExpanded 该组是展开状态还是伸缩状态

\* @param convertView 重用已有的视图对象

\* @param parent 返回的视图对象始终依附于的视图组

\*/ // 获取显示指定分组的视图

@Override

public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) \{

GroupViewHolder groupViewHolder;

if (convertView == null)\{

convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.partent\_item,parent,false);

groupViewHolder = new GroupViewHolder();

groupViewHolder.tvTitle = (TextView)convertView.findViewById(R.id.label\_group\_normal);

convertView.setTag(groupViewHolder);

\}else \{

groupViewHolder = (GroupViewHolder)convertView.getTag();

groupViewHolder.tvTitle.setText(groupString\[groupPosition\]);

return convertView;

/\*\*

\* 获取一个视图对象，显示指定组中的指定子元素数据。

\* @param groupPosition 组位置

\* @param childPosition 子元素位置

\* @param isLastChild 子元素是否处于组中的最后一个

\* @param convertView 重用已有的视图(View)对象

\* @param parent 返回的视图(View)对象始终依附于的视图组

\* @return

\* @see android.widget.ExpandableListAdapter\#getChildView(int, int, boolean, android.view.View,

\* android.view.ViewGroup)

\*/ //取得显示给定分组给定子位置的数据用的视图

@Override

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

ChildViewHolder childViewHolder;

if (convertView==null)\{

convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.child\_item,parent,false);

childViewHolder = new ChildViewHolder();

childViewHolder.tvTitle = (TextView)convertView.findViewById(R.id.expand\_child);

convertView.setTag(childViewHolder);

\}else \{

childViewHolder = (ChildViewHolder) convertView.getTag();

childViewHolder.tvTitle.setText(childString\[groupPosition\]\[childPosition\]);

return convertView;

\} //指定位置上的子元素是否可选中

@Override public boolean isChildSelectable(int groupPosition, int childPosition) \{

return true;

static class GroupViewHolder \{

TextView tvTitle;

static class ChildViewHolder \{

TextView tvTitle;

相信大家能看得懂，个人看法笔记  如有错误欢迎留言斧正

android 双层listview,ExpandableListView 双层list view的使用案例

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