Changes

The previous chapters have introduced the key features of the ConstraintLayout class and outlined the best practices for ConstraintLayout-based user interface design within the Android Studio Layout Editor. Although the concepts of ConstraintLayout chains and ratios were outlined in the chapter entitled [[A Guide to the Android ConstraintLayout]], we have not yet addressed how to make use of these features within the Layout Editor. The focus of this chapter, therefore, is to provide practical steps on how to create and manage chains and ratios when using the ConstraintLayout class.

Chains may be implemented either by adding a few lines to the XML layout resource file of an activity or by using some chain specific features of the Layout Editor.