Android学习历程-子菜单(Sub Menu)

 

package com.example.testcontextmenu;

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

public class TestSubMenu extends Activity {

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

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		SubMenu sub = menu.addSubMenu("文件");
		SubMenu edit = menu.addSubMenu("编辑");
		sub.add(0, Menu.FIRST, 0, "新建");
		sub.add(0, Menu.FIRST + 1, 0, "打开");
		edit.add(0, Menu.FIRST + 2, 0,"剪切");
		edit.add(0, Menu.FIRST + 3, 0,"复制");
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case Menu.FIRST:
			setTitle("新建文件");
			break;
		case (Menu.FIRST+1):
			setTitle("打開文件");
			break;
		case (Menu.FIRST+2):
			setTitle("剪切文件");
			break;
		case (Menu.FIRST+3):
			setTitle("复制文件");
			break;
		}
		return true;
	}

}