在使用Android Studio 3.0编辑包含ConstraintLayout元素的布局时,我遇到了问题。
我的依赖关系如下:
project.ext.support_library_version = '26.0.0-beta2'
dependencies {
compile 'com.android.support.constraint:constraint-layout:1.1.0-beta1'
compile "com.android.support:palette-v7:${project.ext.support_library_version}"
compile "com.android.support:support-v13:${project.ext.support_library_version}"
compile "com.android.support:customtabs:${project.ext.support_library_version}"
compile "com.android.support:cardview-v7:${project.ext.support_library_version}"
...
}
UI编辑器中显示的错误为:
The following classes could not be instantiated:
- android.support.constraint.ConstraintLayout (Open Class, Show Exception, Clear Cache)
Tip: Use View.isInEditMode() in your custom views to skip code or show sample data when shown in the IDE. If this is an unexpected error you can also try to build the project, then manually refresh the layout.
显示的堆栈跟踪如下:
java.lang.AssertionError: Entries for a declare-styleable should be after the array declaration.
at com.android.tools.idea.res.AppResourceRepository.getDeclaredArrayValues(AppResourceRepository.java:634)
at com.android.tools.idea.res.ResourceClassGenerator.generateStyleable(ResourceClassGenerator.java:249)
at com.android.tools.idea.res.ResourceClassGenerator.generate(ResourceClassGenerator.java:120)
at com.android.tools.idea.res.ResourceClassRegistry.findClassDefinition(ResourceClassRegistry.java:102)
at org.jetbrains.android.uipreview.ModuleClassLoader.findClass(ModuleClassLoader.java:101)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.jetbrains.android.uipreview.ModuleClassLoader.loadClass(ModuleClassLoader.java:215)
at android.support.constraint.ConstraintLayout.init(ConstraintLayout.java:494)
at android.support.constraint.ConstraintLayout.<init>(ConstraintLayout.java:466)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:481)
at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:264)
at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:222)
at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:206)
at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:337)
at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:348)
at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:248)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:733)
at android.view.LayoutInflater.inflate(LayoutInflater.java:495)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:334)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:382)
at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:193)
at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:591)
at com.android.tools.idea.rendering.RenderTask.lambda$inflate$3(RenderTask.java:739)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
清理/构建/使缓存失效等都无法解决问题。请注意,该应用程序功能完好,只有 UI 编辑器不再工作。
谁面临同样的问题或者有解决方案?