We are happy to announce the release of ConstraintLayout 2.1.0 alpha 2, with many new features :)

dependencies {
implementation 'androidx.constraintlayout:constraintlayout:2.1.0-alpha2'
}

What's new in 2.1.0 alpha 2

More information about the new features in 2.1.0 can be found on the wiki, the source code is available on https://github.com/androidx/constraintlayout

ConstraintLayout

android:layout_width and android:layout_height are now optional, with wrap_content as default behavior
new layout_constraintWidth and layout_constraintHeight attributes for expressing dimension constraints
supports negative margins for constraints
supports baseline to top and baseline to bottom constraints
supports baseline margin constraints
SharedValues allow to inject external values into ConstraintLayout

Support for overshoot interpolators (anticipate, overshoot)
Enhanced MotionHelper support
Add animated update of ConstraintSet to MotionLayout updateStateAnimate(id,cset,duration);
Shared value based ViewTransition
scheduleTransitonTo allow you to que a transition to run at the completion of the current transition.

Carousel now supports an infinite (wrap-around) mode
ReactiveGuide : A guideline that position itself automatically when a SharedValue changes
MotionEffect : inject Keyframes to referenced views moving in a given direction
MotionLabel - A View for animating single line text

ConstraintLayout.LayoutParams now inherits directly from ViewGroup.LayoutParams, not ViewGroup.MarginLayoutParams.