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Strange issue with Unity project on Android

December 9, 2019 - 12:37pm #1

Hello,

I face a  strange issue with my Unity project on Android. I do simple Model Target recognition projects with advanced 360 trained target. It works fine in the Unity player on PC and on some Android devices (Samsung Galaxy Note 10, Google Pixel C for example). But on other Android devices in doesn't recognize the target for some reason. Looks like engine is not getting initialized properly or so. I see camera background fine but target is not recognized. The most suspicious line in the log is

E/AR: VideoBackgroundConfig with screen size of zero received, skipping config step

I don't see this line on the devices which work fine.

What cat be an issue here and how to work around it ?

Android log is attached. 

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Plain text icon Android Log.txt22.78 KB

Strange issue with Unity project on Android

December 11, 2019 - 7:44am #6

Log is attached. Includes the app start, pointing at target and away and app quit. There is only one trackable event line in there

I/Unity: Trackable QLn320 NO_POSE -- UNKNOWN

Nothing more.

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Plain text icon Android Log 2.txt247.17 KB

Strange issue with Unity project on Android

December 11, 2019 - 7:24am #5

Hi, 

It's surely not a license issue. The same APK works on the Pixel C just fine. And on a few other devices I have around. Including other Zebra model.

Will provide log soon.

Strange issue with Unity project on Android

December 11, 2019 - 1:40am #4

Hi,

ARCore is not required for MT. I was under the impression that an ARCore device was used. ( don't ask me why :) )

If the Vuforia Core sample work as expected, maybe the issue is the license, could you please confirm that you are using a developer license when testing on the Zebra L10?

Moving forward, if the license check doesn't solve the problem, could you please provide a logcat dump when you are pointing the device to the model and it is not being recognized? ( please include also the startup sequence)

Thank you.

Vuforia Engine Support

 

Strange issue with Unity project on Android

December 10, 2019 - 8:42am #3

Hi,

Unity's package manager says it is Vuforia 8.5.9.

I see video feed just fine but target is not recognized. 

ARCore? Does Advanced Model Targets 360 require ARCore? The device which I have issue with is not ARCore certified so it doesn't have ARCore. I'll try again but it used to work on Pixel C which in not ARCore device. But last time I have tried on the Pixel C it was Vuforia 8.3.8.

Device is Zebra L10 Rugged tablet with Android 8.1. Android Vuforia samples run just fine. Haven't tried model recognition sample though since don't have physical objects for this one.

Strange issue with Unity project on Android

December 10, 2019 - 12:50am #2

Hi,

I see from the logs that you are using 8.5.8 with 2019.2.15.

The error identified is spot on, however I would expect for you to see a Black-screen based on the error. Could you please re-confirm the behavior? ( target is not recognized, video feed is good)

Could you please let us know the Android model and ARCore version being used on the devices where the target is not recognized?

Thank you.

Vuforia Engine Support

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