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 android.view.ViewGroup which allows you
 to position and size widgets in a flexible way. 
          
    
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| ConstraintLayout.LayoutParams | 
          This class contains the different attributes specifying how a view want to be laid out inside
 a ConstraintLayout. 
          
    
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| ConstraintProperties | 
          Added in 2.0
   
  ConstraintProperties provides an easy to use api to update the layout params
  of   | 
      
| 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. 
          
    
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| 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. 
          
    
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| Placeholder | 
          Added in 1.1
  
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