We are very happy to announce the release of ConstraintLayout 1.1.0. It’s available from the google maven repository:

dependencies {
implementation 'com.android.support.constraint:constraint-layout:1.1.0'
}

This stable release fixes various issues in the 1.0 release, as well as introducing a new Optimizer to increase layout performances. The main additions from 1.0 are new helper objects (notably barriers), complex chain support, dimension constraints and circular constraints.

Documentation is available on https://developer.android.com/reference/android/support/constraint/ConstraintLayout.html