建立在Android Studio中新的空白活动时意外添加文件 [英] Unexpected file added when creating new blank activity in android studio

问题描述

我得到了新的Andr​​oid工作室，并创建一个新的空白的活动时，我注意到一件事。

I got the new android studio, and I noticed one thing when creating a new blank activity.

与Java的活性对应的布局是由两次，一次是为一个内容：

The layout that corresponds with the java for the activity is made twice, once as a content:

这新布局的精确副本的常规 activity_menu.xml 除了这一个被称为 content_menu.xml 。我也注意到这块code在布局code activity_menu.xml ：

This new layout is an exact replica of the regular activity_menu.xml except this one is called content_menu.xml. I also noticed this piece of code in the layout code of activity_menu.xml:

    <include layout="@layout/content_menu" />

这是什么额外的布局呢？我能删除吗？我发现这官方文件，但我仍不很不懂为什么它是必要的。这是不存在的第一个更新...

What is the point of this extra layout? Can I delete it? I found this on the official documentation, but I still don't understand why it is necessary. This wasn't there in the first update...

推荐答案

下面 content_menu 是只为你的 XML名称版面内容。不要让这个困惑。正如你在菜单中看到活动你会看到的setContentView（R.layout.activity_menu）

Here content_menu is just a name for your xml layout content. Don't get confused by this. As you see in your Menu Activity you'll see setContentView(R.layout.activity_menu)

下面的活动被告知，它的布局是在 activity_menu.xml 内容，但在这（ activity_menu.xml ）文件，你看到一个包含标记。在包括标签意味着，在 content_menu.xml 另一个名为 XML 文件中的内容必须包含在当前布局内用于地方包括标签。所以，如果要改变内部的内容您可以在 activity_menu.xml 放下一切，因为它，并在 content_menu.xml ，这一切都会在你的设计中可见。

Here the activity is told that its layout is the content inside activity_menu.xml but in this(activity_menu.xml) file you see an include tag. the include tag means that the content inside another xml file named content_menu.xml must be included inside the current layout at the place where include tag is used. so if want to change the internal content you can leave everything in activity_menu.xml as it is and make your changes in content_menu.xml and it'll all be visible in your design.

如果你不想让 content_menu.xml 文件，你可以一切从这个文件只是复制到 activity_menu.xml 代替＆LT;＆包括GT;标签和删除 content_menu.xml 文件。

and if you don't want the content_menu.xml file you can just copy everything from this file to activity_menu.xml in place of <include > tag and delete the content_menu.xml file.

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