android学习札记之三菜单

android学习笔记之三菜单

1,
  a,创建.重写public boolean onCreateOptionsMenu(Menu menu)
    menu.add添加菜单项
  b,监听菜单选中事件.重写public boolean onOptionsItemSelected(MenuItem item)//item.getItemId()为菜单项的id

 

2,带子菜单的菜单
 重写public boolean onCreateOptionsMenu(Menu menu)
 menu.addSubMenu(CharSequence title)返回父菜单SubMenu,SubMenu.add添加其下级菜单

 

3,从XML加载菜单
 getMenuInflater()返回MenuInflater实例或 new MenuInflater(Context context)
 MenuInflater.inflate(int menuRes, Menu menu) 加载XML
 
4,上下文菜单
 1,registerForContextMenu(View v)注册要显示上下文菜单的控件
 2,重写public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) 创建上下文菜单