Android Studio 3.1 Canary 1 now available

Android Studio 3.0 now available

Android Emulator 26.2.0 canary with Quick Boot

Android Studio 3.0 RC 2 now available

Android Studio 3.0 RC 1 now available

ConstraintLayout 1.1.0 beta 3 is now available

Android Studio 3.0 Beta 7 is now Available

ConstraintLayout 1.1.0 beta 2

It’s available from the maven repository:

dependencies {
  compile 'com.android.support.constraint:constraint-layout:1.1.0-beta2'
Changes:

Many bug fixes (mostly in complex behavior in chains, match constraint, min/max/ratio/percent)
Redesign of the constraint optimizer, performances are improved
Change in behavior with 0dp in packed chain (0dp elements will spread)
Added a new attribute to enforce constraints on wrap_content if needed (previously, wrap_content was considered a fixed dimension not subject to the constraints):
app:layout_constrainedWidth=”true|false”
app:layout_constrainedHeight=”true|false”
Note that the setting to have a match_constraint set to wrap behavior has been deprecated, instead you should use the above layout_constrainedWidth/Height attribute along with width=wrap_content.