动态启用/禁用隐藏/取消隐藏Android的动作条操作图标 [英] dynamically enable/disable hide/unhide Android ActionBar action icon
问题描述
我开发一个Android应用程序,它采用一个标准动作条。
某个用户屏幕上我有一个条件需要一个过滤器图标,
根据数据的特征被显示,如一些数据是可过滤
其他人没有。
我找不到动作条,看起来可能的候选人为programmaticaly任何方法
隐藏的动作条操作图标。
如何启用/禁用动作条操作图标?
或者
如何隐藏/取消隐藏的动作条操作图标?
I am developing an Android application that employs a standard ActionBar.
on a certain screen i have a Filter icon that is conditionally required,
depending on characteristics of the data being displayed, e.g. some data is filterable
Others not.
i cannot find any methods on actionbar that look likely candidates for programmaticaly
hiding an actionbar action icon.
how can i enable/disable an actionbar action icon?
Or
how can i hide/unhide an actionbar action icon?
推荐答案
看一看这一点,就说明了如何在运行时更改菜单项。
Have a look at this, it shows how to change menu items at runtime.
<一个href="http://developer.android.com/guide/topics/ui/menus.html#ChangingTheMenu">http://developer.android.com/guide/topics/ui/menus.html#ChangingTheMenu
例如,你可以保存菜单为您的活动里面onCreateOpionsMenu(成员变量),然后做这样的事情:
You could for example save the menu as a member variable of your Activity inside onCreateOpionsMenu() and then do something like this:
MenuItem item = mMenu.findItem(R.id.addAction);
item.doSomething()
当你想改变的东西在一个特定的菜单项
when you want to change something on a specific menu item.
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