![]() Using Android's XML vocabulary, you can quickly design UI layouts and the screen elements they contain, in the same way you create web pages in HTML - with a series of nested elements.Įach layout file must contain exactly one root element, which must be a View or ViewGroup object. Tip: To debug your layout at runtime, use the For example, you can declare your app's default layouts in XML, and then The Android framework gives you the flexibility to use either or both of these methods toīuild your app's UI. Using XML files also makes it easy to provide different layouts forĭifferent screen sizes and orientations (discussed further in Supporting Different Screen Sizes). YourĪpp can create View and ViewGroup objects (and manipulate their properties) programmatically.ĭeclaring your UI in XML allows you to separate the presentation of your app from the code thatĬontrols its behavior.
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