Menu

1。普通的Menu[size=medium]
　　在主Activity中覆盖onCreateOptionsMenu(Menu menu)方法。[/size]

/**初始化菜单*/
@Override
    public boolean onCreateOptionsMenu(Menu menu) {
    	//1 组 2 项 3 顺序 4 标题
    	menu.add(1, 1, 1, "apple");
    	menu.add(1, 2, 2, "bannae");
    	menu.add(1, 3, 3, "taozi");
    	return true;
    }
/**点击事件*/
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if(item.getItemId()==1){
        	System.out.println("apple");
        }
    	return true;
    }

2 Context Menu
　　类似于电脑上的右键，长按某个View之后弹出来的菜单。
　　首先在main.xml里定义若干个按钮。然后覆盖onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo)方法。

public class MainActivity extends Activity {
	private Button btn1;
	private Button btn2;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btn1=(Button) findViewById(R.id.button1);
        btn2=(Button) findViewById(R.id.button2);
        //为Button 注册
        registerForContextMenu(btn1);
        registerForContextMenu(btn2);
    }
    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
    		ContextMenuInfo menuInfo) {
    	if(v.getId()==btn1.getId()){
    		menu.setHeaderTitle("这是button1");
    		//1 组 2 项 3 顺序 4 标题
        	menu.add(1, 1, 1, "apple1");
        	menu.add(1, 2, 2, "bannae2");
        	menu.add(1, 3, 3, "taozi3");
    	}
    	if(v.getId()==btn2.getId()){
    		menu.setHeaderTitle("这是button2");
    		//1 组 2 项 3 顺序 4 标题
        	menu.add(1, 1, 1, "apple1");
        	menu.add(1, 2, 2, "bannae2");
        	menu.add(1, 3, 3, "taozi3");
    	}
    	super.onCreateContextMenu(menu, v, menuInfo);
    }
}

需长按button 键

3 SubMenu

 @Override
    public boolean onCreateOptionsMenu(Menu menu) {
    	//1 组 2 项 3 顺序 4 标题
    	menu.add(1, 1, 1, "apple");
    	menu.add(1, 2, 2, "bannae");
    	menu.add(1, 3, 3, "taozi");
    	//增加子项
    	SubMenu subMenu=menu.addSubMenu("桃子");
    	subMenu.add(10,10,100,"大桃子");
    	subMenu.add(10,11,101,"小桃子");
    	return true;
    }