“布局”是否与 Android Studio 中的“布局资源”相同？ 如何以编程方式创建 XML 布局资源？

Question

I am really confused by these two concepts. I have known "layout resource" refer to some XML format files such as "activity_main.xml", and inside an XML file there is a layout. So "layout" and "layout resource" may be different, I assume.

Today when I am using inflate (int resource, ViewGroup root, boolean attachToRoot) , I don't know how I can get the ID of the "resource" (aka the XML file) , because I just programmingly create a new layout for ListView to display items, and I can only get the ID of the new layout by using mylayout.setId(View.generateViewId()) . But I don't know the ID of the "resource", since I never create an XML file. Is the ID of a layout equal to the ID of its XML file?

So the question is here: when I only create a layout programmingly, how can I get its XML file? Should I create a XML file rather than a layout? If so, how can I make a new XML file programmingly?

Answer 1

You can directly access the id of your xml file through: int id = R.layout.activity_main

Note that this id is associated with the xml file itself. To access the id of a specific view within your layout file, replace layout with id : R.id.my_view_id .

For example, if you want to inflate my_layout.xml , you can pass R.layout.my_layout in the resource parameter of inflate (int resource, ViewGroup root, boolean attachToRoot) .

When you're inflating a layout at run-time, you are using an existing xml file to create your layout. A layout resource is a layout . Layout is just an abstraction to represent your UI. It does not refer to anything specific.

Also, you cannot 'create' an xml layout programmatically (rather you shouldn't) to generate your UI at run-time. But, you can create a view or a set of views contained within a ViewGroup programmatically.