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ConstraintLayout 1.0 is now available
Android Studio 2.3 RC 1 is Now Available
ConstraintLayout beta 5 is now available
Android Studio 2.3 Beta 4 is now available
Android Emulator Revision 25.3.0 (Feb 2017)
Android SDK Tools Revision 25.3.0 (Feb 2017)
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Release Updates
ConstraintLayout 1.0 is now available
Wednesday, February 22, 2017
After months of intensive development, we are delighted to announce the 1.0 release of the ConstraintLayout library. It's available as a small unbundled library, in the Android Studio SDK Manager (under the "Support Repository" section), compatible with API level 9 (Gingerbread and above). We recommend updating to this version, particularly if used in production.
Note:
with Android Studio 2.3 reaching release candidate status, we also encourage people to switch to it for editing layouts (ConstraintLayout included). Many improvements have been made since 2.2, providing a smoother experience.
The ConstraintLayout library allows you to create complex layouts easily, avoiding deep nested hierarchies and providing many powerful features for designing UIs:
Relative positioning of widgets to parent or siblings
Centering positioning and bias control
Flexible size control (min/max/wrap/constrained)
Per axis group behavior (chains, weights)
Advanced visibility behavior (gone handling and margins)
Horizontal and Vertical virtual guidelines (fixed positions or percentage-based)
Aspect Ratio support
Advanced API to set constraints programmatically, allowing easy animations between layouts
A
code lab
is available as an introduction to ConstraintLayout as well as a
developer guide
. A complete online
documentation
is also available. Many excellent tutorials have also been created by the developers’ community; you can find them on
YouTube
,
Medium
, or your
favorite search engine
.
Changes since beta5:
bug fixes related to wrap_content, support for MEASURE_STATE_TOO_SMALL.