Android Motionlayout：Android 资源链接失败

Question

重构 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 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.

没有关于哪个文件产生错误的指示，据我所知，我没有在我的项目中的任何地方使用这些属性中的任何一个。

Answer 1

此问题与 Android Studio 3.6 和早于 2.0.0-beta3 的 ConstraintLayout 版本有关 - 我已报告此问题 here。这已在 ConstraintLayout 2.0.0-beta3 中修复。

Android Studio 3.5 不会产生此错误。

要使其在 AS 3.6 beta 中运行，请升级到 ConstraintLayout 2.0.0-beta3 或更高版本。

Answer 2

如果即使升级 ConstraintLayout 也无济于事，请尝试将 format 属性添加到您的 attr 在你的 attrs.xml 文件中声明。

<resources>
    <attr name="yourAttrName" format="string" />
</resources>

为您的属性选择合适的格式。

Answer 3

升级到 constraintlayout:2.0.0-beta4，对我有用，或更高版本。将 android studio 升级到 3.6

后会发生这种情况

Answer 4

我将 gradle 版本升级到 com.android.tools.build:gradle:3.6.0 然后遇到这个问题，只需将 gradle 版本降级到 com.android.tools.build:gradle:3.5.3 并解决问题

Answer 5

你必须做两件事：

更新您的 android 工作室。
添加最新的依赖实现

'androidx.constraintlayout:constraintlayout:2.0.0-rc1'

Android Motionlayout：Android 资源链接失败

Android Motionlayout: Android resource linking failed

android

android-motionlayout