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Vuforia fails to initialize when deployed to Android (BlackScreen)

July 3, 2018 - 8:55am #1

Hello,

I am currently upgrading a Vuforia based Unity project from Vuforia 6.2 to 7.1.35

However I am unable to build a working version of the project onto an Android device now that I have updated the Vuforia version the project uses.

All I see when I go to scan something, is a black screen.

When I check the logs it appears that Vuforia is failing to initialize:

- - - - - - -

AndroidJavaException: java.lang.ClassNotFoundException: com.vuforia.VuforiaUnityPlayer.VuforiaInitializer

java.lang.ClassNotFoundException: com.vuforia.VuforiaUnityPlayer.VuforiaInitializer

at java.lang.Class.classForName(Native Method)

at java.lang.Class.forName(Class.java:400)

at java.lang.Class.forName(Class.java:326)

at com.unity3d.player.UnityPlayer.nativeRender(Native Method)

at com.unity3d.player.UnityPlayer.c(Unknown Source)

at com.unity3d.player.UnityPlayer$d$1.handleMessage(Unknown Source)

at android.os.Handler.dispatchMessage(Handler.java:98)

at android.os.Looper.loop(Looper.java:154)

at com.unity3d.player.UnityPlayer$d.run(Unknown Source)

Caused by: java.lang.ClassNotFoundException: Didn't find class "com.vuforia.VuforiaUnityPlayer.VuforiaInitializer" on path: DexPathList[[zip file "/data/app/APPID-1/base.apk"],nativeLibraryDirectories=[/data/app/APPID-1/lib/arm, /data/app/APPID-1/base.apk!/lib/armeabi-v7a, /system/lib, /vendor/lib]]

at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)

at java.lang.ClassLoader.loadClass(ClassLoader.java:380)

at java.lang.ClassLoader.loadClass(ClassLoader.java:312)

... 9 more

  at UnityEngine.AndroidJNISafe.CheckException () [0x0008c] in /Users/builduser/buildslave/unity/build/Runtime/Export/AndroidJNISafe.cs:24

  at UnityEngine.AndroidJNISafe.CallStaticObjectMethod (IntPtr clazz, IntPtr methodID, UnityEngine.jvalue[] args) [0x00011] in /Users/builduser/buildslave/unity/build/Runtime/Export/AndroidJNISafe.cs:207

  at UnityEngine.AndroidJavaObject._CallStatic[AndroidJavaObject] (System.String methodName, System.Object[] args) [0x002d8] in /Users/builduser/buildslave/unity/build/Runtime/Export/AndroidJavaImpl.cs:460

  at UnityEngine.AndroidJavaObject.CallStatic[AndroidJavaObject] (System.String methodName, System.Object[] args) [0x00004] in /Users/builduser/buildslave/unity/build/artifacts/generated/common/runtime/AndroidJavaBindings.gen.cs:82

  at UnityEngine.AndroidJavaObject.FindClass (System.String name) [0x0001e] in /Users/builduser/buildslave/unity/build/Runtime/Export/AndroidJavaImpl.cs:591

  at UnityEngine.AndroidJavaClass._AndroidJavaClass (System.String className) [0x00013] in /Users/builduser/buildslave/unity/build/Runtime/Export/AndroidJavaImpl.cs:611

  at UnityEngine.AndroidJavaClass..ctor (System.String className) [0x00009] in /Users/builduser/buildslave/unity/build/artifacts/generated/common/runtime/AndroidJavaBindings.gen.cs:92

  at Vuforia.AndroidUnityPlayer.LoadNativeLibrariesFromJava () [0x00000] in <filename unknown>:0

  at Vuforia.AndroidUnityPlayer.InitAndroidPlatform () [0x00000] in <filename unknown>:0

  at Vuforia.AndroidUnityPlayer.InitializePlatform () [0x00000] in <filename unknown>:0

  at Vuforia.VuforiaRuntime.InitPlatform (IUnityPlayer player) [0x00000] in <filename unknown>:0

  at Vuforia.PlatformRuntimeInitialization.InitPlatform () [0x00000] in <filename unknown>:0

(Filename: /Users/builduser/buildslave/unity/build/Runtime/Export/AndroidJNISafe.cs Line: 24)

- - - - - - -

Does anyone know what could possibly be causing this error/behaviour?

Thanks,

SmithDavis

SmithDavis
Joined:
March 11, 2013
Posts: 9
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Vuforia fails to initialize when deployed to Android (BlackScreen)

July 19, 2018 - 1:18am #5

Hi Strasza,

I figured out that this problem was simply being caused by a directory naming issue, where a * was being used where it shouldn't have been.

This didn't appear to prevent Vuforia 6.2 from working but now prevents Vuforia 6.5+ from being compiled properly.

Thanks,

SmithDavis

SmithDavis
Joined:
March 11, 2013
Posts: 9
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Vuforia fails to initialize when deployed to Android (BlackScreen)

July 11, 2018 - 12:15pm #4

I am seeing this issue in Unity 2018.1 and Unity 2018.2. I have Vuforia 7.2.20 installed. When running on Android the logs state it cannot find the Dll files for Vuforia.

adocracy
Joined:
August 4, 2012
Posts: 8
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Vuforia fails to initialize when deployed to Android (BlackScreen)

July 9, 2018 - 11:54am #3

Hello SmithDavis,

Are you seeing this in any new projects created in 7.1.35? We have migration guides in our Library such as this one: https://library.vuforia.com/content/vuforia-library/en/articles/Solution/migrate-vuforia-62-to-65.html Can you confirm that you followed such steps?

Thanks,

Vuforia Support

Strasza
Joined:
June 13, 2017
Posts: 1721
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Vuforia fails to initialize when deployed to Android (BlackScreen)

July 4, 2018 - 12:51am #2

Same here.

 

Unity 2018.1.0f2

Vuforia 7.2.20

Android build using IL2CPP

 

AndroidJavaException: java.lang.ClassNotFoundException: com.vuforia.VuforiaUnityPlayer.VuforiaInitializer

 

Note: Vuforia works correctly when built on debug mode.

 

What is happening?

 

 

Sithdown
Joined:
December 21, 2017
Posts: 8
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