牛骨文教育服务平台(让学习变的简单)
前言
Java内部类
从一个View向一个Activity跳转
Android 与 SQLite
Android工程A依赖B，B依赖C
Android重要控件概览(上)
Installation error: INSTALL_PA
Android布局概览
动态引用APK文件
Android重要控件概览(中)
Android重要控件概览(下)
Gallery和ImageSwitcher
Android之Toast
Android之Dialog
Android之Notification
Android之Menu
Android Menu中android:showAsAct
Android SharedPreferences存储数据的
Android手势识别之GestureDetector
不同APP通过SharedPreferences传递数据（共
一个自定义的Topbar模板
关于Activity回收造成View选中不对应的问题
Android之Fragment静态加载
当前位置:牛骨文教育服务平台 》开发手册 》 学习手册 》 Android基础与异常处理 》 Android之Menu

1、选项菜单（OptionsMenu）：

（1）创建选项菜单：重写onCreateOptionsMenu(Menu menu)：     1)通过xml设置MenuInflater.inflate();      2)动态设置；

（2）设置菜单项点击事件：onOptionsItemSelected();

（3）通过xml设置MenuInflater.inflate();

         res ——> menu ——>main.xml 

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

    <item
        android:id="@+id/action_settings1"
        android:orderInCategory="100"
        android:showAsAction="never"
        android:title="菜单一"/>

    <item
        android:id="@+id/action_settings2"
        android:orderInCategory="100"
        android:showAsAction="never"
        android:title="菜单二"/>
</menu>

           MainActivity.java 

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.

		// 创建选项菜单
		// (1)通过xml设置MenuInflater.inflate();	

		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

        // 设置菜单项点击事件：onOptionsItemSelected();
	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		switch (item.getItemId()) {
		case R.id.action_settings1:
			Toast.makeText(this, "点击了菜单项一", Toast.LENGTH_SHORT).show();
			break;

		case R.id.action_settings2:
			Toast.makeText(this, "点击了菜单项二", Toast.LENGTH_SHORT).show();
			break;
		}
		return super.onOptionsItemSelected(item);
	}

（4）动态添加菜单项
         MainActivity.java 

        @Override
	public boolean onCreateOptionsMenu(Menu menu) {
		
		//menu.add(groupId, itemId, order, title):返回值是MenuItem
		
		//(2)动态设置
		MenuItem menuItem = menu.add(1, 100, 1, "菜单一");
		menuItem.setTitle("Menu一");
		menuItem.setIcon(R.drawable.ic_launcher);  //API>=11时不显示图标
		
		menu.add(1, 101, 2, "菜单二");
		menu.add(1, 102, 3, "菜单三");
		menu.add(1, 103, 4, "菜单四");
		
		return super.onCreateOptionsMenu(menu);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		switch (item.getItemId()) {
		case 100:
			Intent intent=new Intent(MainActivity.this,Menu1.class);
			item.setIntent(intent);      //设置点击跳转页面
			Toast.makeText(this, "点击了菜单项一", Toast.LENGTH_SHORT).show();
			break;
		case 101:
			Toast.makeText(this, "点击了菜单项二", Toast.LENGTH_SHORT).show();
			break;
		case 102:
			Toast.makeText(this, "点击了菜单项三", Toast.LENGTH_SHORT).show();
			break;
		case 103:
			Toast.makeText(this, "点击了菜单项四", Toast.LENGTH_SHORT).show();
			break;
		}
		return super.onOptionsItemSelected(item);
	}

2、上下文菜单（ContextMenu）

在一个Activity里面只有一个“选项菜单”，它是针对整个Activity的。如果长按Activity里面的某个View（ListView、GridView等），也会弹出一个菜单操作，这个就是上下文菜单。

（1）创建方法：
1）首先给View（ListView、GridView等）注册上下文菜单registerForContextMenu()；
2）添加上下文菜单内容onCreateContextMenu()；  A.通过加载xml文件中的菜单项；   B.通过代码动态添加；
3）设置菜单点击后的响应事件：onContextItemSelected()； 

public class MainActivity extends Activity {

	private ListView listView;
	private SimpleAdapter simpleAdapter;
	private List<Map<String, Object>> data;

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

		listView = (ListView) findViewById(R.id.listView);

		data = new ArrayList<Map<String, Object>>();
		simpleAdapter = new SimpleAdapter(this, getData(), R.layout.item,
				new String[] { "image", "text" }, new int[] { R.id.imageView,
						R.id.textView });

		listView.setAdapter(simpleAdapter);

		// 为ListVIew注册上下文菜单
		this.registerForContextMenu(listView);
	}

	private List<Map<String, Object>> getData() {
		Map<String, Object> map1 = new HashMap<String, Object>();
		map1.put("image", R.drawable.calendar);
		map1.put("text", "日历");
		data.add(map1);
		Map<String, Object> map2 = new HashMap<String, Object>();
		map2.put("image", R.drawable.camera);
		map2.put("text", "照相机");
		data.add(map2);
		Map<String, Object> map3 = new HashMap<String, Object>();
		map3.put("image", R.drawable.clock);
		map3.put("text", "时钟");
		data.add(map3);
		Map<String, Object> map4 = new HashMap<String, Object>();
		map4.put("image", R.drawable.games_control);
		map4.put("text", "游戏");
		data.add(map4);
		Map<String, Object> map5 = new HashMap<String, Object>();
		map5.put("image", R.drawable.world);
		map5.put("text", "地图");
		data.add(map5);

		return data;
	}

	//选项菜单
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// TODO Auto-generated method stub
		return super.onCreateOptionsMenu(menu);
	}
	

	// 重写上下文菜单
	@Override
	public void onCreateContextMenu(ContextMenu menu, View v,
			ContextMenuInfo menuInfo) {
		menu.setHeaderTitle("应用程序扩展操作");
		menu.setHeaderIcon(R.drawable.ic_launcher);
		
		//动态添加菜单项
		//menu.add(1, 100, 1, "粘贴");
		//menu.add(1, 101, 1, "复制");
		//menu.add(1, 102, 1, "剪切");
		//menu.add(1, 103, 1, "重命名");
		
		//通过XML加载菜单项
		MenuInflater inflater=getMenuInflater();
		inflater.inflate(R.menu.main_context, menu);
	}

	// 设置上下文菜单的点击事件
	@Override
	public boolean onContextItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		/*switch (item.getItemId()) {
		case 100:
			Toast.makeText(MainActivity.this, "点击了粘贴", Toast.LENGTH_SHORT).show();
			break;

		case 101:
			Toast.makeText(MainActivity.this, "点击了复制", Toast.LENGTH_SHORT).show();

			break;
		case 102:
			Toast.makeText(MainActivity.this, "点击了剪切", Toast.LENGTH_SHORT).show();

			break;
		case 103:
			Toast.makeText(MainActivity.this, "点击了重命名", Toast.LENGTH_SHORT).show();

			break;
		}*/
		
		switch (item.getItemId()) {
		case R.id.action_settings1:
			Toast.makeText(MainActivity.this, "点击了粘贴", Toast.LENGTH_SHORT).show();
			break;

		case R.id.action_settings2:
			Toast.makeText(MainActivity.this, "点击了复制", Toast.LENGTH_SHORT).show();

			break;
		case R.id.action_settings3:
			Toast.makeText(MainActivity.this, "点击了剪切", Toast.LENGTH_SHORT).show();

			break;
		case R.id.action_settings4:
			Toast.makeText(MainActivity.this, "点击了重命名", Toast.LENGTH_SHORT).show();

			break;
		}
		return super.onContextItemSelected(item);

	}
}

3、子菜单（SubMenu）

res——》menu——》main.xml（子菜单的布局方法） 

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

    <item
        android:showAsAction="never"
        android:title="文件">
        
        <menu >
            <item 
                android:id="@+id/new_file"
                android:showAsAction="never"
                android:title="新建"/>
            
            <item 
                android:id="@+id/open_file"
                android:showAsAction="never"
                android:title="打开"/>
            
            <item 
                android:id="@+id/save_file"
                android:showAsAction="never"
                android:title="保存"/>
            
            <item 
                android:id="@+id/rename_file"
                android:showAsAction="never"
                android:title="重命名"/>
        </menu>
                
    </item>
    
    <item
        android:showAsAction="never"
        android:title="编辑">
        
        <menu >
            <item 
                android:id="@+id/v_file"
                android:showAsAction="never"
                android:title="粘贴"/>
            
            <item 
                android:id="@+id/c_edit"
                android:showAsAction="never"
                android:title="复制"/>
            
            <item 
                android:id="@+id/x_edit"
                android:showAsAction="never"
                android:title="剪切"/>
            
            <item 
                android:id="@+id/rename_edit"
                android:showAsAction="never"
                android:title="重命名"/>                 
        </menu>
        
    </item>

</menu>

MainActivity.java（以下代码将动态添加子菜单注释起来了） 

package com.example.testsubmenu;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.SubMenu;
import android.widget.Toast;

public class MainActivity 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.
		// getMenuInflater().inflate(R.menu.main, menu);
		
		//动态添加子菜单项
		/*SubMenu subMenu1 = menu.addSubMenu("文件");
		SubMenu subMenu2 = menu.addSubMenu("编辑");
		
		subMenu1.setHeaderTitle("文件操作");
		subMenu1.setHeaderIcon(R.drawable.ic_launcher);
		subMenu1.add(1, 100, 1, "新建");
		subMenu1.add(1, 101, 1, "打开");
		subMenu1.add(1, 102, 1, "保存");
		subMenu1.add(1, 103, 1, "重命名");
		
		subMenu2.setHeaderTitle("编辑操作");
		subMenu2.setHeaderIcon(R.drawable.ic_launcher);
		subMenu2.add(2, 100, 1, "粘贴");
		subMenu2.add(2, 101, 1, "复制");
		subMenu2.add(2, 102, 1, "剪切");
		subMenu2.add(2, 103, 1, "重命名");*/
		
		//通过加载XML静态加载子菜单
		MenuInflater menuInflater=getMenuInflater();
		menuInflater.inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		//动态的点击事件
		/*if (item.getGroupId()==1) {
			switch (item.getItemId()) {
			case 100:
				Toast.makeText(this, "点击了新建", Toast.LENGTH_SHORT).show();
				break;

			case 101:
				Toast.makeText(this, "点击了打开", Toast.LENGTH_SHORT).show();
				break;
			case 102:
				Toast.makeText(this, "点击了保存", Toast.LENGTH_SHORT).show();
				break;
			case 103:
				Toast.makeText(this, "点击了重命名", Toast.LENGTH_SHORT).show();
				break;
			}
		} 
		else {
			
			switch (item.getItemId()) {
			case 100:
				Toast.makeText(this, "点击了粘贴", Toast.LENGTH_SHORT).show();
				break;

			case 101:
				Toast.makeText(this, "点击了复制", Toast.LENGTH_SHORT).show();
				break;
			case 102:
				Toast.makeText(this, "点击了剪切", Toast.LENGTH_SHORT).show();
				break;
			case 103:
				Toast.makeText(this, "点击了重命名", Toast.LENGTH_SHORT).show();
				break;
		}
			
		}*/
		
		//静态的点击事件
		switch (item.getItemId()) {
		case R.id.new_file:
			Toast.makeText(this, "点击了新建", Toast.LENGTH_SHORT).show();
			break;
		case R.id.open_file:
			Toast.makeText(this, "点击了打开", Toast.LENGTH_SHORT).show();
			break;
		case R.id.save_file:
			Toast.makeText(this, "点击了保存", Toast.LENGTH_SHORT).show();
			break;
		case R.id.rename_file:
			Toast.makeText(this, "点击了重命名", Toast.LENGTH_SHORT).show();
			break;

		case R.id.v_file:
			Toast.makeText(this, "点击了粘贴", Toast.LENGTH_SHORT).show();
			break;
		case R.id.c_edit:
			Toast.makeText(this, "点击了复制", Toast.LENGTH_SHORT).show();
			break;
		case R.id.x_edit:
			Toast.makeText(this, "点击了剪切", Toast.LENGTH_SHORT).show();
			break;
		case R.id.rename_edit:
			Toast.makeText(this, "点击了重命名", Toast.LENGTH_SHORT).show();
			break;
		}

		return super.onOptionsItemSelected(item);
	}
}
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