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Xml file viewer for android android#
The following three layout types may be the root element in an Android XML Layout:Ī Linear Layout aligns its contents into a single direction, whether vertical or horizontal.Ī Relative Layout displays its child content in positions relative to the parent. Text, images, and buttons are all Views in Android.Ī ViewGroup is a subclass of View, and is essentially an 'invisible container' that holds multiple Views or ViewGroups together, and defines their layout properties. It represents a rectangular area of the screen, and is responsible for displaying information or content, and event handling. All other XML elements will reside within this root object.Ī View is simply an object from Android's built-in View class. Linear Layouts, Relative Layouts, and Frame Layouts (see Root Views section below) may all be root elements. Anatomy of Android XML LayoutsĮach layout file must contain one (and only one!) root element. Resources are the additional files and static content an application needs, such as animations, color schemes, layouts, menu layouts. Much like creating an HTML layout and later altering it with jQuery, as we've done in previous courses, we can create XML layouts in Android, and later alter them using Java logic.Īndroid XML layouts are also part of a larger umbrella of Android files and components called resources. However, unlike HTML, XML is case-sensitive, requires each tag is closed properly, and preserves whitespace. It was created as a standard way to encode data in internet-based applications. Much like HTML (or HyperText Markup Language), XML is also a markup language. As we'll see firsthand when we create our first layout in the next lesson, Android layouts are written in eXtensible Markup Language, also known as XML.