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Black screen android unity build

Hello,

So I have a unity project in which I dragged a WikitudeCamera (deleted the original one that comes with a scene) and and ImageTracker. That's all there is in the scene. If I run it in unity with a webcam, it works perfectly. The image gets detected and the model gets show accordingly. But when I build for Android using my phone, I only get a black screen and nothing else.

Building and running the main menu scene from the example scenes does work. But only when I go from Menu Scene to any other scene, only then it works. If I build any example scene seperately, I get the same result. A black screen,

I have looked around on the forum trying to find a solution, but so far I haven't found one that works.

  • Wikitude_Unity_8-9-0_8-9-0_2019_09_24_03_43_11
  • Unity 2019.2.14f1
  • Device: Huawei P9
  • Platform: Android 7.0

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It's been a while since I did it. Sorry... 

In my start scene I created an empty game object and attached this script on it. So when I start my app for the first time it asks for permission.

Hope this works...

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Hi,


Is this issue still happening on Android, as the original post mentions, or is it iOS? Could you please tell us on which devices it is happening, and if you've tested on multiple devices? Is the problem reproducible on all of them, or just on some?

Additionally, could you please send us the logs from the device when the issue is occurring, so that we have more information to work with?


Thank you,

Alexandru

Yes, it's an android device ( Nokia 6.1 plus ). Will try it on other devices and update you with log if the same problem persists.

Hi,


The issue is that when you're building just the samples, the camera permissions are not requested anymore. The code that does this can be found in the MenuController.cs script, so if the Main Menu scene is missing, the camera cannot be accessed.


Best regards,

Alexandru

I get the same error but the .apk file does not open at all in my device. I am using:


Wikitude_Unity_9-0-0_9-0-0_2020_03_31_00_16_22
Unity 2019.3.12f1

Device: Huawei Honor 7 Lite

Platform: Android 7.0


I attacked the error I am getting inside Unity.

Dragging the menu controller onto a gameobject did fix this. Thank you.

Hello,


I am also facing the same problem. I dragged a WikitudeCamera (deleted the original one that comes with a scene) and and ImageTracker. That's all there is in the scene. If I run it in unity with a webcam, it works. But when I build and run for my Android phone, I only get a black screen along with Wikitude logo and nothing else.


Wikitude_Unity_9-0-0_9-0-0_2020_03_31_00_16_22

Unity 2019.4.5f1

Android Device: POCO F1

OS: Android 10

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You have to give permission to your camera in the AndroidManifest.xml file.

<uses-permission android:name="android.permission.CAMERA" />

<uses-feature android:name="android.hardware.camera" android:required="true" />

These 2 permissions were already there in the AndroidManifest.xml.

@elli karyati. Thank you. The camera is now working.

@Abhishek: did you manage to try it on other devices? Could you still reproduce it there, or is it just happening on the Nokia 6.1 plus?


@Elli: it seems like you have a problem either with your project or with your Unity / Android SDK installation in general. Is this happening with the project bundled inside the downloaded zip, or did you create a new Unity project and imported the .unitypackage into it manually?

I finally managed to fix it and is running on my Android device.

I am not sure if it was a wikitude or unity problem. I started with a new project and imported the wikitude package at the beginning, but I had to make some changes on the script of the ManifestAR and ContinuousRecognitionController files in order to work. 

Attaching the menu controller to what game object worked?


Hi,


This shouldn't be needed anymore in the latest 9.0.0 release.


Best regards,

Alexandru

So, I added the Wikitude camera and Image tracker. I set the wtc and also replaced the app id. Still a black screen shows up without asking camera permission on build with the wikitude watermark. Using the latest sdk.
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