重构为motionlayout 2.0.0-beta1后，我不断收到构建错误（我知道它不是最新版本-beta2会产生相同的错误）。
这是堆栈跟踪：
AAPT: /Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:6514: error: resource attr/flow_horizontalSeparator (aka com.example:attr/flow_horizontalSeparator) not found.
/Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:6514: error: resource attr/flow_verticalSeparator (aka com.example:attr/flow_verticalSeparator) not found.
/Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:6515: error: resource attr/flow_horizontalSeparator (aka com.example:attr/flow_horizontalSeparator) not found.
/Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:6515: error: resource attr/flow_verticalSeparator (aka com.example:attr/flow_verticalSeparator) not found.
/Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:6517: error: resource attr/flow_horizontalSeparator (aka com.example:attr/flow_horizontalSeparator) not found.
/Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:6517: error: resource attr/flow_verticalSeparator (aka com.example:attr/flow_verticalSeparator) not found.
/Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:6517: error: resource attr/motionProgress (aka com.example:attr/motionProgress) not found.
/Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:6860: error: resource attr/motionProgress (aka com.example:attr/motionProgress) not found.
/Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:6861: error: resource attr/motionProgress (aka com.example:attr/motionProgress) not found.
/Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:6876: error: resource attr/motionProgress (aka com.example:attr/motionProgress) not found.
/Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:6877: error: resource attr/motionProgress (aka com.example:attr/motionProgress) not found.
/Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:6877: error: resource attr/waveDecay (aka com.example:attr/waveDecay) not found.
/Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:7288: error: resource attr/motionPathRotate (aka com.example:attr/motionPathRotate) not found.
/Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:7290: error: resource attr/motionProgress (aka com.example:attr/motionProgress) not found.
/Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:7549: error: resource attr/motionProgress (aka com.example:attr/motionProgress) not found.
/Users/TBS/StudioProjects/ExampleApp/app/build/intermediates/incremental/mergeDebugResources/merged.dir/values/values.xml:8270: error: resource attr/duration (aka com.example:attr/duration) not found.
error: failed linking references.
没有迹象表明哪个文件会产生错误，据我所知，我在项目的任何地方都没有使用任何这些属性。
最佳答案
此问题与2.0.0-beta3之前的Android Studio 3.6和ConstraintLayout版本有关-我已经报告了问题here。在ConstraintLayout 2.0.0-beta3中已修复此问题。
Android Studio 3.5不会产生此错误。
要使其在AS 3.6 beta中工作，请升级到ConstraintLayout 2.0.0-beta3或更高版本。