android.support.constraint

Classes

Barrier Added in 1.1

A Barrier references multiple widgets as input, and creates a virtual guideline based on the most extreme widget on the specified side. 

ConstraintLayout A ConstraintLayout is a ViewGroup which allows you to position and size widgets in a flexible way. 
ConstraintLayout.LayoutParams This class contains the different attributes specifying how a view want to be laid out inside a ConstraintLayout
ConstraintProperties Added in 2.0

ConstraintProperties provides an easy to use api to update the layout params of ConstraintLayout children

 
ConstraintsChangedListener Added in 2.0

Callbacks on state change

 
ConstraintSet This class allows you to define programmatically a set of constraints to be used with ConstraintLayout
Group Added in 1.1

This class controls the visibility of a set of referenced widgets. 

Guideline Utility class representing a Guideline helper object for ConstraintLayout
Placeholder Added in 1.1

A Placeholder provides a virtual object which can position an existing object.