Android_menu_optionMenu

xml文件：
<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:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context="com.example.menudemo.OptionMenuDemo" >

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/hello_world" />

</RelativeLayout>

源代码：

package com.example.menudemo;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.Toast;

/**

 * 选项菜单：optionMenu

 *

 * 创建选项菜单：重写onCreateMenu()

 * |--设置菜单项

 *         可用代码动态设置menu.add()

 *         还可通过xml设置MenuInflater.inflate()

 * |--设置菜单项点击事件：onOptionsItemSelected()

 * @author Administrator

 *

 */

public class OptionMenuDemo extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        //通过xml加载布局文件的形式创建菜单

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

        MenuItem item = menu.add(1, 1, 1, "menu1");

        item.setTitle("高级 menu");

        item.setIcon(R.drawable.ic_launcher);//api>=11不显示图标

        menu.add(1, 2, 1, "menu2");

        menu.add(1, 3, 1, "menu3");

        menu.add(1, 4, 1, "menu4");

        menu.add(1, 5, 1, "menu5");

        return true;

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        switch(item.getItemId()){

        /*case R.id.menu1:

            Toast.makeText(this, "clicked menu1", Toast.LENGTH_SHORT).show();

            break;

        case R.id.menu2:

            Toast.makeText(this, "clicked menu2", Toast.LENGTH_SHORT).show();

            break;*/

        case 1:{

            //点击菜单1跳转到第二个页面

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

            item.setIntent(intent);

            Toast.makeText(this, "clicked menu1", Toast.LENGTH_SHORT).show();

            break;

        }

        case 2:

            Toast.makeText(this, "clicked menu2", Toast.LENGTH_SHORT).show();

            break;

        case 3:

            Toast.makeText(this, "clicked menu3", Toast.LENGTH_SHORT).show();

            break;

        case 4:

            Toast.makeText(this, "clicked menu4", Toast.LENGTH_SHORT).show();

            break;

        case 5:

            Toast.makeText(this, "clicked menu5", Toast.LENGTH_SHORT).show();

            break;

        }

        return super.onOptionsItemSelected(item);

    }

}