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#compose
Title
# compose
b

brabo-hi

04/21/2022, 12:06 AM
Hi all, am i the only one who is having issue with the preview when using
androidx.activity:activity-compose:	1.6.0-alpha01
?
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java.lang.ClassNotFoundException: android.view.OnBackInvokedCallback
at com.android.tools.idea.rendering.classloading.loaders.DelegatingClassLoader.findClass(DelegatingClassLoader.kt:81)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
at com.android.tools.idea.rendering.classloading.loaders.DelegatingClassLoader.loadClass(DelegatingClassLoader.kt:65)
at androidx.compose.ui.tooling.ComposeViewAdapter$FakeOnBackPressedDispatcherOwner$1.<init>(ComposeViewAdapter.kt:744)
at androidx.compose.ui.tooling.ComposeViewAdapter.<init>(ComposeViewAdapter.kt:743)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:352)
at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:189)
at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:149)
at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:301)
at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:417)
at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:428)
at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:332)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:965)
at android.view.LayoutInflater.inflate(LayoutInflater.java:663)
at android.view.LayoutInflater.inflate(LayoutInflater.java:505)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:361)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:436)
at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:121)
at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:736)
at com.android.tools.idea.rendering.RenderTask.lambda$inflate$7(RenderTask.java:892)
at com.android.tools.idea.rendering.RenderExecutor$runAsyncActionWithTimeout$2.run(RenderExecutor.kt:187)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
i

Ian Lake

04/21/2022, 1:33 AM
Activity 1.6 is only compatible when compiling with the specific Android T Dev Preview 2 build as per the release notes: https://developer.android.com/jetpack/androidx/releases/activity#1.6.0-alpha01
You should be using Activity 1.5 if you aren't using that Dev Preview build
Are you using the Android T Dev Preview 2?
b

brabo-hi

04/21/2022, 11:54 PM
no i am not using this version, i will keep the version 1.5 for now. Thank you
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