package com.example.optionmenu;

import android.content.Intent;

import android.os.Bundle;

import android.support.v7.app.ActionBarActivity;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

	}

	/**

	 * onCreateOptionMenu(Menu menu)

	 */

	@Override

	public boolean onCreateOptionsMenu(Menu menu) {

		// this.getMenuInflater().inflate(R.menu.main, menu);

		/*

		 * add(int groupId, int itemId, int order, CharSequence title)

		 * Add a new item to the menu.

		 */

		MenuItem item = menu.add(1, 100, 1, "准备跳转");

		item.setTitle("aaaaaa");

		item.setIcon(R.drawable.ic_launcher);

		menu.add(1, 101, 1, "菜单二");

		menu.add(1, 102, 1, "菜单三");

		return true;

	}

	@Override

	public boolean onOptionsItemSelected(MenuItem item) {

		// Intent intent = new Intent(this,SecondActivity.class);

		// System.out.println("=====准备item.setIntent(intent)======");

		// item.setIntent(intent);

		// System.out.println("=====已经item.setIntent(intent)======");

		// return super.onOptionsItemSelected(item);

		switch (item.getItemId()) {

		case 100:

			Intent intent = new Intent(MainActivity.this, SecondActivity.class);

			System.out.println("======准备item.setIntent(intent)2======");

			item.setIntent(intent);

			break;

		case 101:

			Toast.makeText(MainActivity.this, "点击了菜单一", Toast.LENGTH_SHORT)

					.show();

			break;

		case 102:

			Toast.makeText(MainActivity.this, "点击了菜单二", Toast.LENGTH_SHORT)

					.show();

			break;

		}

		return super.onOptionsItemSelected(item);

	}

}

package com.example.optionmenu;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.Toast;

public class SecondActivity extends Activity {

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		// TODO Auto-generated method stub

		super.onCreate(savedInstanceState);

		setContentView(R.layout.second_main);

		System.out.println("====== SecondActivity.onCreate()方法=========");

	}

	@Override

	public boolean onCreateOptionsMenu(Menu menu) {

		// this.getMenuInflater().inflate(R.menu.main, menu);

		/*

		 * add(int groupId, int itemId, int order, CharSequence title)

		 * Add a new item to the menu.

		 */

		System.out.println("======onCreateOptionMenu(Menu menu)方法=====");

		menu.add(1, 101, 1, "fuck01");

		menu.add(1,102,1,"fuck02");

		return true;

	}

	@Override

	public boolean onOptionsItemSelected(MenuItem item) {

		System.out.println("======onOptionsItemSelected(MenuItem item)方法=====");

		int itemid = item.getItemId();

		if(itemid==101){

			Intent intent = new Intent(SecondActivity.this,MainActivity.class);

			item.setIntent(intent);//跳转,实现activity的切换

		}else if(itemid==102){

			Toast.makeText(SecondActivity.this, "i am the secondActivity's item2", Toast.LENGTH_SHORT).show();

		}

		return super.onOptionsItemSelected(item);

	}

	@Override

	protected void onStart() {

		super.onStart();

		System.out.println("====== SecondActivity.onStart()方法=========");

	}

	@Override

	protected void onResume() {

		super.onResume();

		System.out.println("====== SecondActivity.onResume()方法=========");

	}

	@Override

	protected void onRestart() {

		super.onRestart();

		System.out.println("====== SecondActivity.onRestart()方法=========");

	}

	@Override

	protected void onStop() {

		super.onStop();

		System.out.println("====== SecondActivity.onStop()方法=========");

	}

	@Override

	protected void onDestroy() {

		super.onDestroy();

		System.out.println("====== SecondActivity.onDestroy()方法=========");

	}

}

<menu 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"

    tools:context="com.example.optionmenu.MainActivity" >

    <item

        android:id="@+id/action_settings"

        android:orderInCategory="100"

        android:title="@string/action_settings"

        app:showAsAction="never"/>

</menu>

<?xml version="1.0" encoding="utf-8"?>

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

    tools:context="com.example.optionmenu.SecondActivity">

    <item

        android:id="@+id/action_settings2"

        android:orderInCategory="100"

        android:title="我是第二个activity的title"

        app:showAsAction="never"/>

</menu>