Program to create three Menu items |Android Program|

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"
    tools:context=".MainActivity"
    android:orientation="vertical">

    <TextView
        android:id="@+id/textView"
        android:text="categories"
        android:textSize="18sp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />
    <Spinner
        android:id="@+id/spinner"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</LinearLayout>

MainActivity.java

package com.example.menuprogram;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener {


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

        Spinner spinner=findViewById(R.id.spinner);
        spinner.setOnItemSelectedListener(this);

        List<String> categories=new ArrayList<>();
        categories.add("Customer Service");
        categories.add("Business Development");
        categories.add("Information Technology");


        ArrayAdapter<String> dataAdapter=new ArrayAdapter<String>(this,
                android.R.layout.simple_spinner_item,categories);

        dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(dataAdapter);
    }


    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
        String item=parent.getItemAtPosition(position).toString();
        Toast.makeText(parent.getContext(),"Selected: "+item,
                Toast.LENGTH_LONG).show();
    }

    @Override
    public void onNothingSelected(AdapterView<?> parent) {

    }
}