（十一）Menu及其使用

1、Menu的一级菜单与二级菜单的新建，以及单选与复选。值得一提，复选需要对状态进行手工设定

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);

		SubMenu sub1 = menu.addSubMenu(0, 1, 0, "您的性别是");
		SubMenu sub2 = menu.addSubMenu(0, 1, 0, "喜欢的书是");
		// SUB1
		sub1.setHeaderIcon(R.drawable.ic_launcher);
		sub1.setHeaderTitle("请选择您的性别");
		sub1.addSubMenu(0, FEMALE, 0, "女士");
		sub1.addSubMenu(0, MALE, 0, "男士");

		sub1.setGroupCheckable(0, true, true);
		// SUB2

		items[0] = sub2.add(1, Green, 0, book[0]).setCheckable(true);
		items[1] = sub2.add(1, RED, 0, book[1]).setCheckable(true);

		return true;
	}

	public boolean onOptionsItemSelected(MenuItem mi) {
		switch (mi.getItemId()) {
		case MALE:
			edittext.setText("您选择的是：男士");
			mi.setChecked(true);
			break;
		case FEMALE:
			edittext.setText("您选择的是：女士");
			mi.setChecked(true);
			break;
		case Green:
			if (mi.isChecked()) {
				mi.setChecked(false);
			} else {
				mi.setChecked(true);
			}
			break;
		case RED:
			if (mi.isChecked()) {
				mi.setChecked(false);
			} else {
				mi.setChecked(true);
			}
			break;
		}
		return true;
	}