UI Development in Android
Description
At the heart of the common controls in Android are two classes:
android.view.Viewandroid.view.ViewGroup
The View class represents a general-purpose View object.
The common controls in Android ultimately extend the View class.
ViewGroup is a view and it contains other views.
ViewGroup is the base class for a list of layout classes.
Layout
Android uses the concept of layouts to manage how controls are laid out within a container view.
You can choose from several approaches to build UIs in Android.
- You can construct UIs entirely in code.
- You can also define UIs in XML.
- You can even combine the two-define the UI in XML and then refer to it, and modify it, in code.