Android Studio 三级树形列表

  前几篇详细介绍了二级树形列表的实现，以及通用方法封装，今天就详细介绍一下三级树形列表的基本实现。如果理解了前几篇的二级树形列表实现，那么三级列表实现就简单了。

   说直白点就是在二级列表里在嵌套一个二级列表，就简单解决了。不详细在去介绍了，直接上代码吧。

   模型：ThreeTreeModel

package com.example.appview.mian_page.Frament.Preject_Tance_Frament.ItemA_Model;

import java.util.Date;
import java.util.List;

public class ThreeTreeModel {
    private int CaiJiId;
    private String CaiJiSNO;
    private List<DianBiao> dianBiaoList;
    private Date AddTime;

    public void setCaiJiId(int caiJiId) {
        CaiJiId = caiJiId;
    }

    public void setCaiJiSNO(String caiJiSNO) {
        CaiJiSNO = caiJiSNO;
    }

    public void setDianBiaoList(List<DianBiao> dianBiaoList) {
        this.dianBiaoList = dianBiaoList;
    }

    public void setAddTime(Date addTime) {
        AddTime = addTime;
    }


    public int getCaiJiId() {
        return CaiJiId;
    }

    public String getCaiJiSNO() {
        return CaiJiSNO;
    }

    public List<DianBiao> getDianBiaoList() {
        return dianBiaoList;
    }

    public Date getAddTime() {
        return AddTime;
    }

  public   static class DianBiao{
        private int DianBiaoId;
        private String DianBiaoSNO;
        private List<SheBei> sheBeiList;
        private Date AddTime;

        public void setDianBiaoId(int dianBiaoId) {
            DianBiaoId = dianBiaoId;
        }

        public void setDianBiaoSNO(String dianBiaoSNO) {
            DianBiaoSNO = dianBiaoSNO;
        }

        public void setSheBeiList(List<SheBei> sheBeiList) {
            this.sheBeiList = sheBeiList;
        }

        public void setAddTime(Date addTime) {
            AddTime = addTime;
        }

        public int getDianBiaoId() {
            return DianBiaoId;
        }

        public String getDianBiaoSNO() {
            return DianBiaoSNO;
        }

        public List<SheBei> getSheBeiList() {
            return sheBeiList;
        }

        public Date getAddTime() {
            return AddTime;
        }
    }
   public static class SheBei{
        private int SheBeiId;
        private String SheBeiName;
        private Date AddTime;

        public void setSheBeiId(int sheBeiId) {
            SheBeiId = sheBeiId;
        }

        public void setSheBeiName(String sheBeiName) {
            SheBeiName = sheBeiName;
        }

        public void setAddTime(Date addTime) {
            AddTime = addTime;
        }

        public int getSheBeiId() {
            return SheBeiId;
        }

        public String getSheBeiName() {
            return SheBeiName;
        }

        public Date getAddTime() {
            return AddTime;
        }
    }
}

一级通用类：ParentAdapterHelper

package com.example.appview.mian_page.Frament.Preject_Tance_Frament.ItemA_Model.Tree;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

import com.example.appview.R;
import com.example.appview.mian_page.Frament.Preject_Tance_Frament.ItemA_Model.ThreeTreeModel;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.ListIterator;

public class ParentAdapterHelper<T1 extends ExpandableListViewInterface,T2 extends ExpandableListViewInterface,T3 extends ExpandableListViewInterface> extends BaseExpandableListAdapter {
    private Context context;
    private List<ThreeTreeModel> CaiJiModel;//国家的集合
    LayoutInflater layoutInflater;
    private T1 t1;
    private T2 t2;
    private T3 t3;
   public ChildenAdapterHelper<T2,T3> adapter;
    public ParentAdapterHelper(Context context, List<ThreeTreeModel> CaiJiModel,T1 t1,T2 t2,T3 t3){
        this.context=context;
        this.CaiJiModel=CaiJiModel;
        this.t1=t1;
        this.t2=t2;
        this.t3=t3;
        layoutInflater = LayoutInflater.from(context);
    }
    //添加一个组元素
    public void add(ThreeTreeModel data) {
        if (CaiJiModel == null) {
            CaiJiModel = new ArrayList<>();
        }
        CaiJiModel.add(data);
        notifyDataSetChanged();
    }

    //往特定位置，添加一个组元素
    public void add(int position, ThreeTreeModel data) {
        if (CaiJiModel == null) {
            CaiJiModel= new ArrayList<>();
        }
        CaiJiModel.add(position, data);
        notifyDataSetChanged();
    }
    //往特定位置，添加一个组元素
    public void addItem(int position,int childenposition, ThreeTreeModel.DianBiao data) {

        CaiJiModel.get(position).getDianBiaoList().add(data);

        notifyDataSetChanged();
    }
    //移除当前数据的组件
    public void remove(ThreeTreeModel data) {
        if (CaiJiModel != null) {
            CaiJiModel.remove(data);
        }
        notifyDataSetChanged();
    }
    //移除当前位置的组件
    public void remove(int position) {
        if (CaiJiModel != null) {
            CaiJiModel.remove(position);
        }
        notifyDataSetChanged();
    }

    public void clear() {
        if (CaiJiModel!= null) {
            CaiJiModel.clear();
        }
        notifyDataSetChanged();
    }
    // 组数量
    @Override
    public int getGroupCount() {
        return CaiJiModel.size();
    }
    //子View数量
    @Override
    public int getChildrenCount(int i) {
        return 1;
    }
    //获取组对象
    @Override
    public Object getGroup(int i) {
        return CaiJiModel.get(i);
    }
    //获取子View对象
    @Override
    public Object getChild(int i, int i1) {
        return CaiJiModel.get(i).getDianBiaoList().get(i1);
    }
    // 组View下标
    @Override
    public long getGroupId(int i) {
        return i;
    }
    //子View下标
    @Override
    public long getChildId(int i, int i1) {
        return i1;
    }

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

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
        convertView=  layoutInflater.inflate(R.layout.preject_item_addcaiji_onetree, null);
        TextView textView = convertView.findViewById(R.id.preject_item_caijiqi_onetree);
        textView.setText(CaiJiModel.get(groupPosition).getCaiJiSNO());
        return t1.getGroupView(groupPosition,convertView);
    }
    @Override
    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
        AbsListView.LayoutParams params = new AbsListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        ChildenExpandableListView childenExpandableListView=new ChildenExpandableListView(context);
        childenExpandableListView.setLayoutParams(params);
        adapter = new ChildenAdapterHelper(context,CaiJiModel.get(groupPosition).getDianBiaoList(),t2,t3);
        childenExpandableListView.setAdapter(adapter);
        childenExpandableListView.setPadding(30, 5, 0, 5);
        return childenExpandableListView;
    }
    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return false;
    }
}

接口：ExpandableListViewInterface

package com.example.appview.mian_page.Frament.Preject_Tance_Frament.ItemA_Model.Tree;

import android.view.View;
import android.view.ViewGroup;

public interface ExpandableListViewInterface {
    public View getGroupView(int groupPosition, View convertView);
    public View getChildView(int groupPosition, int childPosition, View convertView);
}

二级：ChildenAdapterHelper

package com.example.appview.mian_page.Frament.Preject_Tance_Frament.ItemA_Model.Tree;

import android.app.Activity;
import android.content.Context;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;
import com.example.appview.R;
import com.example.appview.mian_page.Frament.Preject_Tance_Frament.ItemA_Model.ThreeTreeModel;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TransferQueue;

public class ChildenAdapterHelper<T1 extends ExpandableListViewInterface,T2 extends ExpandableListViewInterface> extends BaseExpandableListAdapter {
    private Context context;
    private List<ThreeTreeModel.DianBiao> dianBiaoList;//电表集合
    LayoutInflater layoutInflater;
    private T1 t1;
    private T2 t2;
    //构造参数
    public ChildenAdapterHelper(Context context,List<ThreeTreeModel.DianBiao> dianBiaoList,T1 t1,T2 t2) {
       this.context=context;
       this.dianBiaoList=dianBiaoList;
       this.t1=t1;
       this.t2=t2;
        layoutInflater = LayoutInflater.from(context);
    }
    //添加一个组元素
    public void add(ThreeTreeModel.DianBiao data) {
        if (dianBiaoList == null) {
            dianBiaoList = new ArrayList<>();
        }
        dianBiaoList.add(data);
        notifyDataSetChanged();
    }
    //往特定位置，添加一个组元素
    public void add(int position, ThreeTreeModel.DianBiao data) {
        if (dianBiaoList == null) {
            dianBiaoList= new ArrayList<>();
        }
        dianBiaoList.add(position, data);
        notifyDataSetChanged();
    }

    //移除当前数据的组件
    public void remove(ThreeTreeModel.DianBiao data) {
        if (dianBiaoList != null) {
            dianBiaoList.remove(data);
        }
        notifyDataSetChanged();
    }
    //移除当前位置的组件
    public void remove(int position) {
        if (dianBiaoList != null) {
            dianBiaoList.remove(position);
        }
        notifyDataSetChanged();
    }
    //往特定位置，添加一个子元素
    public void addItem(int position, ThreeTreeModel.SheBei data) {
        dianBiaoList.get(position).getSheBeiList().add(data);
        notifyDataSetChanged();
    }
    //移除当前位置的组件
    public void removeItem(int position,int childenposition) {
        if (dianBiaoList.get(position).getSheBeiList() != null) {
            dianBiaoList.get(position).getSheBeiList().remove(childenposition);
        }
        notifyDataSetChanged();
    }
    //获取外层组个数
    @Override
    public int getGroupCount() {
        return dianBiaoList.size();
    }
    //获取内层组个数
    @Override
    public int getChildrenCount(int i) {
        return dianBiaoList.get(i).getSheBeiList().size();
    }
    //获取外层组
    @Override
    public Object getGroup(int i) {
        return dianBiaoList.get(i);
    }
    //获取内层数据
    @Override
    public Object getChild(int i, int i1) {
        return dianBiaoList.get(i).getSheBeiList().get(i1);
    }
    //组下标
    @Override
    public long getGroupId(int i) {
        return i;
    }
    //子View下标
    @Override
    public long getChildId(int i, int i1) {
        return i1;
    }
    //不知道做什么用
    @Override
    public boolean hasStableIds() {
        return false;
    }
    @Override
    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
        convertView=  layoutInflater.inflate(R.layout.preject_item_addcaiji_twotree, null);
        TextView textView = convertView.findViewById(R.id.preject_item_dianbiao);
        convertView.setPadding(10,5,0,5);
        textView.setGravity(Gravity.CENTER_VERTICAL|Gravity.LEFT);
        textView.setText(dianBiaoList.get(groupPosition).getDianBiaoSNO());
        return t1.getGroupView(groupPosition,convertView);
    }

    @Override
    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
        convertView=  layoutInflater.inflate(R.layout.preject_item_addcaiji_threetree, null);
        TextView textView = convertView.findViewById(R.id.preject_item_shebeiname);
        convertView.setPadding(30,5,0,5);
        textView.setGravity(Gravity.CENTER_VERTICAL|Gravity.LEFT);
        textView.setText(dianBiaoList.get(groupPosition).getSheBeiList().get(childPosition).getSheBeiName());
        return t2.getChildView(groupPosition,childPosition,convertView);
    }

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

自适应高度类：ChildenExpandableListView

package com.example.appview.mian_page.Frament.Preject_Tance_Frament.ItemA_Model.Tree;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ExpandableListView;

public class ChildenExpandableListView extends ExpandableListView {
    public ChildenExpandableListView(Context context) {
        super(context);
    }

    public ChildenExpandableListView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ChildenExpandableListView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }
    //通过此方法重新计算expandableListView的高度，使得里边的expandableListView全部显示
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2
                , MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);
    }


}

实现类：

package com.example.appview.mian_page.Frament.Preject_Tance_Frament;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.GradientDrawable;
import android.os.Build;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;
import androidx.fragment.app.Fragment;

import com.example.appview.Common.AdapterHelper;
import com.example.appview.Common.AdapterInterface;
import com.example.appview.MainActivity;
import com.example.appview.Model.main_menu.Preject_ItemModel;
import com.example.appview.R;
import com.example.appview.mian_page.Activity.LoginMainPage;
import com.example.appview.mian_page.Frament.Preject_Tance_Frament.ItemA_Activity.Preject_ItemA_AlterJZ;
import com.example.appview.mian_page.Frament.Preject_Tance_Frament.ItemA_Activity.Preject_Item_AddJL;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * 探测待处理页面
 */
public class Preject_ItemA_Frament extends Fragment {
    private List<Preject_ItemModel> preject_itemModels;
    private AdapterHelper<Preject_ItemModel,NoReceive> adapteritem;
    private ListView listView;
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState)
    {
        View view = inflater.inflate(R.layout.preject_item1_frament, container, false);
        listView=view.findViewById(R.id.preject_item1_listview);
        preject_itemModels=new ArrayList<>();
        preject_itemModels=getPreject_itemModels();
        adapteritem=new AdapterHelper<>(getContext(),preject_itemModels,new NoReceive(),R.layout.maingrid_layout4);
        listView.setAdapter(adapteritem);
        return view;
    }
    private List<Preject_ItemModel> getPreject_itemModels(){
        List<Preject_ItemModel> preject_itemModels=new ArrayList<>();
        preject_itemModels.add(new Preject_ItemModel(1,"XX端局",1,1,"待接收", new Date(System.currentTimeMillis())));
        preject_itemModels.add(new Preject_ItemModel(2,"XX支局",2,2,"待接收", new Date(System.currentTimeMillis())));
        preject_itemModels.add(new Preject_ItemModel(3,"XX基站",3,1,"待接收", new Date(System.currentTimeMillis())));
        preject_itemModels.add(new Preject_ItemModel(4,"XX一体化",4,1,"待接收", new Date(System.currentTimeMillis())));
        return  preject_itemModels;
    }

    @Override
    public void onHiddenChanged(boolean hidden) {
        super.onHiddenChanged(hidden);
        if(hidden){
            //TODO now visible to user
          //  Toast.makeText(getContext(), "你离开了该页面", Toast.LENGTH_SHORT).show();

        } else {
            //TODO now invisible to user

            preject_itemModels.add(new Preject_ItemModel(5,"XX宏基站",4,1,"待接收", new Date(System.currentTimeMillis())));

            adapteritem=new AdapterHelper<>(getContext(),preject_itemModels,new NoReceive(),R.layout.maingrid_layout4);
            listView.setAdapter(adapteritem);
        }
    }

    class NoReceive implements AdapterInterface{

        @Override
        public View getView(View view, int position){
            ImageView imageView1=view.findViewById(R.id.preject_item_jztype);
            TextView textView1=view.findViewById(R.id.preject_item_jzname);
            TextView textView2=view.findViewById(R.id.preject_item_jzstate);
            TextView textView3=view.findViewById(R.id.preject_item_addtime);
            ImageView imageView2=view.findViewById(R.id.preject_item_jzcaozuo);
            LinearLayout linearLayout=view.findViewById(R.id.preject_item_layoutcaozuo);
            textView1.setText(adapteritem.list.get(position).getJZ_Name());
            textView2.setText(adapteritem.list.get(position).getJZ_StateName());
             SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// HH:mm:ss
              textView3.setText(simpleDateFormat.format(adapteritem.list.get(position).getAddTime()));
            if (adapteritem.list.get(position).getJZ_TypeId()==1){
                imageView1.setImageResource(R.mipmap.duanju);
            }
            if (adapteritem.list.get(position).getJZ_TypeId()==2){
                imageView1.setImageResource(R.mipmap.zhiju);
            }
            if (adapteritem.list.get(position).getJZ_TypeId()==3){
                imageView1.setImageResource(R.mipmap.jizhan);
            }
            if (adapteritem.list.get(position).getJZ_TypeId()==4){
                imageView1.setImageResource(R.mipmap.qita);
            }
            if (adapteritem.list.get(position).getJZ_State()==1){
                textView2.setTextColor(getResources().getColor(R.color.preject_item1));
                imageView2.setImageResource(R.mipmap.preject_item_caozuo);
            }
            if (adapteritem.list.get(position).getJZ_State()==2){
                textView2.setTextColor(getResources().getColor(R.color.preject_item2));
                imageView2.setImageResource(R.mipmap.preject_itema_alter);
            }
            if (adapteritem.list.get(position).getJZ_State()==3){
                textView2.setTextColor(getResources().getColor(R.color.preject_item3));
            }

            imageView2.setOnClickListener(new View.OnClickListener() {
                @RequiresApi(api = Build.VERSION_CODES.KITKAT)
                @Override
                public void onClick(View v) {
                 View popupView = View.inflate(getContext(), R.layout.preject_item_pop, null);


                // PopupWindowFactory.getPopupWindowInCenter(popupView,ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT,linearLayout);
               getScreen(linearLayout,position);
                }
            });
            return view;
        }
    }

    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
    private void getScreen(LinearLayout linearLayout,int position){
        if (adapteritem.list.get(position).getJZ_State()==1){
            getNoreceive(linearLayout,position);
        }
        if (adapteritem.list.get(position).getJZ_State()==2){
            getAlter(linearLayout,position);
        }


    }
    private void getAlter(LinearLayout linearLayout,int position){
        View popupView = View.inflate(getContext(), R.layout.preject_item_pop_alter, null);
        Button btn1=popupView.findViewById(R.id.preject_item_alter_btn1);
        Button btn2=popupView.findViewById(R.id.preject_item_alter_btn2);
         if (adapteritem.list.get(position).getJZ_TypeId()==3){
             btn1.setText("添加采集器");
         }else{
             btn1.setText("添加机楼");
         }
        GradientDrawable drawable1 =(GradientDrawable)btn1.getBackground();
        drawable1.setColor(getResources().getColor(R.color.preject4));
        GradientDrawable drawable2 =(GradientDrawable)btn2.getBackground();
        drawable2.setColor(getResources().getColor(R.color.preject3));
        PopupWindow popupWindow = new PopupWindow(popupView, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        popupWindow.setFocusable(true);
        popupWindow.setOutsideTouchable(true);
        popupWindow.setAnimationStyle(R.anim.move_pop_left_in);
        popupWindow.setBackgroundDrawable(new BitmapDrawable());
        int popupWidth = popupView.getMeasuredWidth();
        int popupHeight =  popupView.getMeasuredHeight();
        int[] location = new int[2];
        linearLayout.getLocationOnScreen(location);
        popupWindow.showAtLocation(linearLayout, Gravity.NO_GRAVITY, location[0], location[1]);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                popupWindow.dismiss();
                Intent i = new Intent(getContext(), Preject_Item_AddJL.class);

                startActivity(i);
                Toast.makeText(getContext(), "添加机楼", Toast.LENGTH_SHORT).show();

            }
        });
        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                popupWindow.dismiss();
                Intent i = new Intent(getContext(), Preject_ItemA_AlterJZ.class);
                startActivity(i);
               // Toast.makeText(getContext(), "编辑站点", Toast.LENGTH_SHORT).show();
            }
        });

    }
    private void getNoreceive(LinearLayout linearLayout,int position){
        View popupView = View.inflate(getContext(), R.layout.preject_item_pop, null);
        Button btn1=popupView.findViewById(R.id.preject_itemA_btn1);
        Button btn2=popupView.findViewById(R.id.preject_itemA_btn2);
        Button btn3=popupView.findViewById(R.id.preject_itemA_btn3);
        GradientDrawable drawable1 =(GradientDrawable)btn1.getBackground();
        drawable1.setColor(getResources().getColor(R.color.preject4));
        GradientDrawable drawable2 =(GradientDrawable)btn2.getBackground();
        drawable2.setColor(getResources().getColor(R.color.preject3));
        GradientDrawable drawable3 =(GradientDrawable)btn3.getBackground();
        drawable3.setColor(getResources().getColor(R.color.preject2));
        PopupWindow popupWindow = new PopupWindow(popupView, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        popupWindow.setFocusable(true);
        popupWindow.setOutsideTouchable(true);
        popupWindow.setAnimationStyle(R.anim.move_pop_left_in);
        popupWindow.setBackgroundDrawable(new BitmapDrawable());
        int popupWidth = popupView.getMeasuredWidth();
        int popupHeight =  popupView.getMeasuredHeight();
        int[] location = new int[2];
        linearLayout.getLocationOnScreen(location);
        popupWindow.showAtLocation(linearLayout, Gravity.NO_GRAVITY, location[0], location[1]);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                popupWindow.dismiss();
                Toast.makeText(getContext(), "转派", Toast.LENGTH_SHORT).show();
                ShowChoise();
            }
        });
        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                popupWindow.dismiss();
                Toast.makeText(getContext(), "接收", Toast.LENGTH_SHORT).show();
            }
        });
        btn3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                popupWindow.dismiss();
                Toast.makeText(getContext(), "拒绝", Toast.LENGTH_SHORT).show();
            }
        });
    }
    private  void getReceive(){

    }
    private void ShowChoise()
    {

        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity(),android.R.style.Theme_Holo_Light_Dialog);
        //builder.setIcon(R.drawable.ic_launcher);
        builder.setTitle("请选择指派人");
        //    指定下拉列表的显示数据
        final String[] cities = {"张三", "李四", "王二","麻子"};
        //    设置一个下拉的列表选择项
        builder.setItems(cities, new DialogInterface.OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                Toast.makeText(getActivity(), "选择的指派人为：" + cities[which], Toast.LENGTH_SHORT).show();
            }
        });
        builder.show();
    }
}

其它的布局页面就不多说了，理解树形列表的话，这个可以自己定义了。下面是实现效果。

树形列表到这里基本就结束了，三级树形列表还没有做封装，这个可能要放到以后去做了。目前就先介绍到这里。