Android 从一个按钮打开菜单 [英] Android Open Menu from a button

问题描述

有没有办法让按钮调用子菜单?

Is there a way for a button to call a submenu?

我目前有一个菜单，如果他们选择其中一个选项，它会打开一个子菜单，但是我希望能够从 Button 小部件而不是 Menu 对象启动子菜单.

I currently have a menu where if they select one of the options it opens a submenu, however I want to be able to start the submenu from the Button widget instead of the Menu object.

谢谢！

推荐答案

我不一定推荐这个，但我能够以编程方式调用子菜单.首先，在 onCreateOptionsMenu 的覆盖中，我将菜单参数存储到活动中的私有 Menu 变量中.然后，我可以简单地从 onClick() 执行以下操作:

I am not necessarily recommending this, but I was able to call the submenu programatically. First, in the override of onCreateOptionsMenu I stored the menu parameter to a private Menu variable in the activity. Then, I was able to simply do the following from the onClick():

MyActivity.this.openOptionsMenu(); // activity's onCreateOptionsMenu gets called
optionsMenu.performIdentifierAction(R.id.miSubMenu1, 0);

在一个特定的例子中，这为我节省了很多时间，因为子菜单是在请求直接进入子菜单之前几个月建立的.

In a particular instance this saved me a lot of time since the submenu was built months before the request to have an additional button go directly to the submenu.

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