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Android Option Menu

Option Menu:

The options menu is usually the default or one that is related with an activity or context of the application and is invoked when the user hits the ‘menu’ key on their device.

It commonly is situated in the application bar on top of the screen in Windows® operating systems.

The options menu offer a form by which users can get to other facets or functions within the app.

Example:

                                    
                                        // option_menu.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:id="@+id/item1"
            android:title="Item 1"/>
    
        <item android:id="@+id/item2"
            android:title="Item 2"/>
    
        <item android:id="@+id/item3"
            android:title="Item 3"/>
</menu>



// activity_option_menu_example.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
        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=".OptionMenuExample"
        android:orientation="vertical"
        android:padding="16dp"
        android:gravity="center">
   
       <TextView
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:text="To see option menu click on three dots right hand corner in ActionBar"
           android:textSize="20sp"
           android:textColor="@color/colorOrange"
           android:textStyle="bold"/>
   
</LinearLayout>

                                    
                                        // OptionMenuExample.java

package com.example.widgets;
    
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.Toast;
    
public class OptionMenuExample extends AppCompatActivity {
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_option_menu_example);
    }
   
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
   
        MenuInflater inflater=getMenuInflater();
        inflater.inflate(R.menu.option_menu,menu);
        return true;
    }
   
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
   
        switch (item.getItemId()){
   
            case R.id.item1:
                Toast.makeText(getApplicationContext(),"Item 1 clciked",Toast.LENGTH_SHORT).show();
                return true;
   
            case R.id.item2:
                Toast.makeText(getApplicationContext(),"Item 2 clciked",Toast.LENGTH_SHORT).show();
                return true;
   
            case R.id.item3:
                Toast.makeText(getApplicationContext(),"Item 3 clciked",Toast.LENGTH_SHORT).show();
                return true;
   
            default:
                return super.onOptionsItemSelected(item);
        }
   
    }

}

                                    
                                        // OptionMenuExample.kt

import android.os.Bundle
import android.view.Menu
import android.view.MenuInflater
import android.view.MenuItem
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import com.example.widgets.R

class OptionMenuExample : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_option_menu_example)
    }

    override fun onCreateOptionsMenu(menu: Menu): Boolean {
        val inflater: MenuInflater = menuInflater
        inflater.inflate(R.menu.option_menu, menu)
        return true
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        when (item.itemId) {
            R.id.item1 -> {
                Toast.makeText(applicationContext, "Item 1 clicked", Toast.LENGTH_SHORT).show()
                return true
            }
            R.id.item2 -> {
                Toast.makeText(applicationContext, "Item 2 clicked", Toast.LENGTH_SHORT).show()
                return true
            }
            R.id.item3 -> {
                Toast.makeText(applicationContext, "Item 3 clicked", Toast.LENGTH_SHORT).show()
                return true
            }
            else -> return super.onOptionsItemSelected(item)
        }
    }
}

Output