PopupWindow的二级菜单的简单demo

MainActivity.java

package tech.androidstudio.threelevelpopupwindowsimpledemo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private TextView mClickMe;
    private ArrayList<Item> mItemsList;
    private int firstItemPosition;


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

        mClickMe = (TextView)findViewById(R.id.main_clickMe);
        mClickMe.setOnClickListener(this);

        mItemsList = new ArrayList<Item>();
        ArrayList<String> list_HangZhou = new ArrayList<>();
        list_HangZhou.add("哈里哈里配送中心");
        list_HangZhou.add("冷冻配送中心");
        list_HangZhou.add("饮料配送中心");

        Item item_HangZhou = new Item("杭州市场",list_HangZhou);
        mItemsList.add(item_HangZhou);


        ArrayList<String> list_XiaoShan = new ArrayList<>();
        list_XiaoShan.add("萧山配送中心");
        list_XiaoShan.add("萧山冷冻配送中心");
        list_XiaoShan.add("萧山配送中心");

        Item item_XiaoShan = new Item("萧山滨江站市场",list_XiaoShan);
        mItemsList.add(item_XiaoShan);

    }

    /**处理点击的事件,弹出第一级的popupWindow*/
    @Override
    public void onClick(View v) {
        PopupWindow firstPopupWindow = new PopupWindow(this);

        ListView firstListView = new ListView(this);
        firstListView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));

        //获取第一级别的Item的名字的列表
        final ArrayList<String> firstItemNameList = new ArrayList<String>();
        for (int i = 0; i < mItemsList.size(); i++) {
            firstItemNameList.add(mItemsList.get(i).getName());
        }
        ArrayAdapter<String> firstAdapter = new ArrayAdapter<String>(this,R.layout.item_layout,firstItemNameList);
        firstListView.setAdapter(firstAdapter);

        //设置fristListView 到popupWindow里面
        firstPopupWindow.setContentView(firstListView);

        firstPopupWindow.setOutsideTouchable(true);
        firstPopupWindow.setTouchable(true);
        firstPopupWindow.setFocusable(true);

        //一定要设置这个宽和高，不然没有宽度和高度就显示不出来的
        firstPopupWindow.setHeight(v.getHeight()*mItemsList.size());
        firstPopupWindow.setWidth(v.getWidth());

        //获取点击的控件的在屏幕中的位置
        int[] location = new int[2];
        v.getLocationOnScreen(location);

        firstPopupWindow.showAtLocation(v, Gravity.NO_GRAVITY, location[0] +v.getWidth(),location[1]);

        //给这个firstListView 添加点击事件，弹出二级菜单
        firstListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                firstItemPosition =position;

                PopupWindow secondPopupWindow = new PopupWindow(MainActivity.this);//注意这里是用的MainActivity.this
                ListView secondListView = new ListView(MainActivity.this);
                secondListView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));

                final ArrayList<String> secondItemList = mItemsList.get(position).getSubItemList();
                ArrayAdapter<String> secondAdapter = new ArrayAdapter<String>(MainActivity.this,R.layout.item_layout,secondItemList);
                secondListView.setAdapter(secondAdapter);

                secondPopupWindow.setContentView(secondListView);
                secondPopupWindow.setFocusable(true);
                secondPopupWindow.setTouchable(true);
                secondPopupWindow.setOutsideTouchable(true);

                secondPopupWindow.setHeight(view.getHeight() * secondItemList.size());
                secondPopupWindow.setWidth(view.getWidth());

                int[] secondLocation = new int[2];
                view.getLocationOnScreen(secondLocation);

                //注意这里的不要使用view，而要使用mClickMe，不然会如下的报错
                //android.view.WindowManager$BadTokenException: Unable to add window -- token android.view.ViewRootImpl$W@41947150 is not valid; is your activity running?

                secondPopupWindow.showAtLocation(mClickMe,Gravity.NO_GRAVITY,secondLocation[0]+view.getWidth(),secondLocation[1]);


                //最后给secondListView 添加一个点击事件的
                secondListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                    @Override
                    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                        String secondItemName = secondItemList.get(position);
                        String firstItemName = firstItemNameList.get(firstItemPosition);
                        String toastText = "Clicked 第一级:" + firstItemName + " 第二级别：" + secondItemName;
                        Toast.makeText(MainActivity.this, toastText,Toast.LENGTH_SHORT).show();
                        Log.d("kodulf",toastText);

                    }
                });
            }
        });
    }

    //为了实现二级菜单需要有一个类Item，里面有一个list是subItem
    public class Item {
        private String name;
        private ArrayList<String> subItemList;

        public Item(String name, ArrayList<String> subItemList) {
            this.name = name;
            this.subItemList = subItemList;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public ArrayList<String> getSubItemList() {
            return subItemList;
        }

        public void setSubItemList(ArrayList<String> subItemList) {
            this.subItemList = subItemList;
        }

        @Override
        public String toString() {
            return "Item{" +
                    "name='" + name + '\'' +
                    ", subItemList=" + subItemList +
                    '}';
        }
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"  tools:context=".MainActivity">

    <TextView
        android:id="@+id/main_clickMe"
        android:text="切换市场"
        android:gravity="center"
        android:background="@android:color/holo_blue_light"
        android:layout_width="100dp"
        android:layout_height="50dp"
        android:textSize="12sp"
        android:clickable="true"/>
</RelativeLayout>

item_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="100dp"
    android:layout_height="50dp"
    android:id="@+id/text_item"
    android:textSize="12sp"
    android:gravity="center"
    android:background="@android:color/holo_green_light">

</TextView>

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