1. First of all copy the following code into “activity_main.xml” file

<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" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

    <TextView android:text="@string/hello_world" android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignRight="@+id/button1"
        android:layout_alignEnd="@+id/button1"
        android:textSize="20dp"
        android:textColor="#ff00ff"/>


    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/button1"
        android:text="Show popup"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true" />

</RelativeLayout>


2. Copy the following code into "Main_Menu.xml" file
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" tools:context=".MainActivity">


    <Item
        android:id="@+id/one"
        android:text="One"/>

    <Item
        android:id="@+id/two"
        android:text="Two"/>

    <Item
        android:id="@+id/three"
        android:text="Three"/>

</menu>
3. Now, copy the following code and paste into "MainActivity.Java" file
package app.mitindia.com.popupmenu;

import android.app.Activity;
import android.support.v7.app.ActionBarActivity;
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.Toast;
import android.view.View.OnClickListener;

public class MainActivity extends Activity {

    Button button1;

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


        button1 = (Button) findViewById(R.id.button1);
        button1.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                PopupMenu popup = new PopupMenu(MainActivity.this, button1);

                popup.getMenuInflater().inflate(R.menu.menu_main, popup.getMenu());
                popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                    @Override
                    public boolean onMenuItemClick(MenuItem menuItem) {
                        Toast.makeText(MainActivity.this, "You Clicked :" + menuItem.getTitle(), Toast.LENGTH_LONG).show();

                        return false;
                    }
                });
                popup.show();

            }
        });

    }

}

4. Run, and see the output as following screen shot.