What is XML layout?

It is formatted with tags like HTML tags and other XML-based file types include EDS, FDX, and DAE files. An XML file acts as a database to store the data. The most commonly used example of an XML-based file is RSS Feed .

XML is a markup language based on Standard Generalized Markup Language (SGML) used for defining markup languages. XML’s primary function is to create formats for data that is used to encode information for documentation, database records, transactions and many other types of data .

XML tags define the data and used to store and organize data. It’s easily scalable and simple to develop. In Android, the XML is used to implement UI-related data , and it’s a lightweight markup language that doesn’t make layout heavy. XML only contains tags, while implementing they need to be just invoked.

In Android, an XML-based layout is a file that defines the different widgets to be used in the UI and the relations between those widgets and their containers . Android treats the layout files as resources. Hence the layouts are kept in the folder reslayout.