Android - ViewGroup (Layout)

About

A viewGroup is:

• a composite (%%view|widget) GUI (ie a container for simple GUI)
• also the top element of the Android user interface design and is then the start point of GUI definition.

The ViewGroup are invisible user interface containers that:

• hold:
  • other Views
  • or other ViewGroups
• and define their layout properties.

A viewGroup definition are subclasses of the ViewGroup interface.

Articles Related

Declaration

See Android - GUI (Layout)

Type of layout

• Android - LinearLayout (Vertical|Horizontal). Row or column layout.
• RelativeLayout Api and doc A Layout where the positions of the children can be described in relation to each other or to the parent.
• GridLayout Api and Grid View doc
• Android - FrameLayout. FrameLayout is great for simple layouts when you only have one child to view, like a list View that fills the entire content area

• CoordinatorLayout is a super-powered FrameLayout. CoordinatorLayout is intended for two primary use cases:
  • As a top-level application decor or chrome layout
  • As a container for a specific interaction with one or more child views
• A ConstraintLayout is a ViewGroup which allows you to position and size widgets in a flexible way.

Documentation / Reference

• Layout Guide