Create Option Menu in Android Application

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item
        android:id="@+id/action_settings"
        android:orderInCategory="100"
        android:title="@string/action_settings"/>
</menu>


enter a label for your option in 
android:title="@string/action_settings
==============================================================

and type this coding in your layout java page
// this for create a menu in the layout
public boolean onCreateOptionsMenu(Menu menu) {

=============================================================

        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.page, menu);
        return true;
    }
  //to catch the click option from the menu to identify which option selected  
// import MenuItem Library also
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle item selection
        switch (item.getItemId()) {
        
        case R.id.action_settings:
//if action_setting id is chosen it will cal newproductactivity class
            Intent i = new Intent(getApplicationContext(), NewProductActivity.class);
            startActivity(i);
            return true;

        default:
            return super.onOptionsItemSelected(item);

        }
    }

===================================================
now we have one option in option menu 
 import MenuItem Library also

Create Option Menu in Android Application

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item
        android:id="@+id/action_settings"
        android:orderInCategory="100"
        android:title="@string/action_settings"/>
</menu>

Call Another Activity From one Activity in Android Development

to Open new activity or page
here is the android code to open new activity from one another activity

package com.one.click;//Package name
//libraries want to import
import android.R.string;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;

public class MainScreenActivity extends Activity{
    
  //Declare a button
    Button btnNewProduct;
    
    //declare a layout which is want to open when this class called
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_screen);//here is the place to enter layout name
        
        // Buttons assign the id of the buton in our layout
        btnNewProduct = (Button) findViewById(R.id.btnCreateProduct);
      
        
        // here is the place show when click btnNewProduct    buton which class want to open              btnNewProduct.setOnClickListener(new View.OnClickListener() {
            
                       public void onClick(View view) {
                // Launching create new product activity
                Intent i = new Intent(getApplicationContext(), NewProductActivity.class);
                startActivity(i);
                
            }
        });
    }

Call Another Activity From one Activity in Android Development

to Open new activity or page
here is the android code to open new activity from one another activity