How to Create Popup Menu and Set Onclick Listener on Menus in Android Studio Tutorials

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activity_main.xml 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center"
    tools:context=".MainActivity">


    <!--Selected item from popup menu will display here-->
    <TextView
        android:id="@+id/selectedTv"
        android:layout_width="wrap_content"
        android:textColor="#000"
        android:textSize="16sp"
        android:textStyle="bold"
        android:layout_height="wrap_content" />

    <!--click to show popup menu-->
    <Button
        android:id="@+id/showMenuBtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        style="@style/Widget.AppCompat.Button.Colored"
        android:text="Show Popup Menu"/>


</LinearLayout>

MainActivity.java

package com.usmtip.myapplication;

import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.PopupMenu;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;


public class MainActivity extends AppCompatActivity {

    //UI Views
    TextView selectedTv;
    Button showMenuBtn;



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



        //init UI views
        selectedTv = findViewById(R.id.selectedTv);
        showMenuBtn = findViewById(R.id.showMenuBtn);

        //popup menu
        final PopupMenu popupMenu = new PopupMenu(this, showMenuBtn);

        //add menu items in popup menu
        popupMenu.getMenu().add(Menu.NONE, 0, 0, "Copy"); //parm 2 is menu id, param 3 is position of this menu item in menu items list, param 4 is title of the menu
        popupMenu.getMenu().add(Menu.NONE, 1, 1, "Share");
        popupMenu.getMenu().add(Menu.NONE, 2, 2, "Save");
        popupMenu.getMenu().add(Menu.NONE, 3, 3, "Delete");

        //handle menu item clicks
        popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem menuItem) {
                //get id of the clicked item
                int id = menuItem.getItemId();
                //handle clicks
                if (id==0){
                    //Copy clicked
                    //set text
                    selectedTv.setText("Copy clicked");
                }
                else if (id==1){
                    //Share clicked
                    //set text
                    selectedTv.setText("Share clicked");
                }
                else if (id==2){
                    //Save clicked
                    //set text
                    selectedTv.setText("Save clicked");
                }
                else if (id==3){
                    //Delete clicked
                    //set text
                    selectedTv.setText("Delete clicked");
                }
                return false;
            }
        });


        //handle button click, show popup menu
        showMenuBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                popupMenu.show();
            }
        });


    }
}