BufferedInputStream cannot be cast to class AssetManager$AssetInputStream [226457466]

Fixed

Bug

Status Update

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Description

tn...@google.com

created issue #1

Mar 23, 2022 11:34PM

My custom view hits a cast exception when running in layoutlib (Tiramisu preview).

java.lang.ClassCastException: class java.io.BufferedInputStream cannot be cast to class android.content.res.AssetManager$AssetInputStream (java.io.BufferedInputStream is in module java.base of loader 'bootstrap'; android.content.res.AssetManager$AssetInputStream is in unnamed module of loader com.intellij.ide.plugins.cl.PluginClassLoader @7ad8bb39)
	at android.graphics.ImageDecoder$ResourceSource.createImageDecoder(ImageDecoder.java:486)
	at android.graphics.ImageDecoder.decodeBitmapImpl_Original(ImageDecoder.java:1870)
	at android.graphics.ImageDecoder_Delegate.decodeBitmapImpl(ImageDecoder_Delegate.java:42)
	at android.graphics.ImageDecoder.decodeBitmapImpl(ImageDecoder.java:1870)
	at android.graphics.ImageDecoder.decodeBitmap(ImageDecoder.java:1969)
	at com.android.tools.test.shaderexperiment.BitmapTransitionView.<init>(BitmapTransitionView.kt:18)
	at com.android.tools.test.shaderexperiment.BitmapTransitionView.<init>(BitmapTransitionView.kt:11)
	at com.android.tools.test.shaderexperiment.BitmapTransitionView.<init>(BitmapTransitionView.kt)
	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:325)
	at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:174)
	at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:135)
	at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:294)
	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:360)
	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:719)
	at com.android.tools.idea.rendering.RenderTask.lambda$inflate$9(RenderTask.java:875)
	at com.android.tools.idea.rendering.RenderExecutor$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)

The purpose of this was to test AGSL in layoutlib but I think I'm hitting an earlier problem related to loading assets from a custom view in layoutlib, using this call:

ImageDecoder.decodeBitmap(
        ImageDecoder.createSource(context.resources, R.drawable.large_photo))

ShaderExperiment.zip

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Comments

uc...@google.com <uc...@google.com> Mar 28, 2022 05:23AM

Reassigned to an...@google.com.

jg...@google.com <jg...@google.com> Mar 28, 2022 10:31AM

Reassigned to jg...@google.com.

ku...@google.com <ku...@google.com> #2Oct 13, 2022 09:06PM

Marked as fixed, reassigned to ku...@google.com.

Looks like ContextWrapper.getClassLoader() is throwing an NPE.

java_vm_ext.cc:591] JNI DETECTED ERROR IN APPLICATION: JNI FindClass called with pending exception java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.ClassLoader android.content.Context.getClassLoader()' on a null object reference
java_vm_ext.cc:591]   at java.lang.ClassLoader android.content.ContextWrapper.getClassLoader() (ContextWrapper.java:176)
java_vm_ext.cc:591]   at java.lang.ClassLoader com.android.tools.agent.app.inspection.AppInspectionService.findClassLoader() (AppInspectionService.java:435)
java_vm_ext.cc:591]   at void com.android.tools.agent.app.inspection.AppInspectionService.<init>(long) (AppInspectionService.java:88)
java_vm_ext.cc:591]   at com.android.tools.agent.app.inspection.AppInspectionService com.android.tools.agent.app.inspection.AppInspectionService.createAppInspectionService() (AppInspectionService.java:-2)
java_vm_ext.cc:591]   at com.android.tools.agent.app.inspection.AppInspectionService com.android.tools.agent.app.inspection.AppInspectionService.instance() (AppInspectionService.java:55)
java_vm_ext.cc:591] 
java_vm_ext.cc:591]     in call to FindClass

Screen Shot 2022-10-13 at 22.05.41.png

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an...@google.com <an...@google.com> #3Sep 6, 2023 06:23PM

I added NPE protection that resorts to a "safe" way to get a classloader.

an...@google.com <an...@google.com> #4Sep 12, 2024 06:57PM

Thank you for your patience while our engineering team worked to resolve this issue. A fix for this issue is now available in:

Android Studio Ladybug Feature Drop | 2024.2.2 Canary 2
Android Gradle Plugin 8.8.0-alpha02

We encourage you to try the latest update.

If you notice further issues or have questions, please file a new bug report.

Thank you for taking the time to submit feedback — we really appreciate it!

Issue 226457466