Unable to Export APK from Unity - Build Prompts for Folder Instead (Magic Leap 2 Developer Pro)

Unity Development
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Give us as much detail as possible regarding the issue you’re experiencing:

Unity Editor version: 6000.1.5f, Unity 2022.3
ML2 OS version: v1.12.0
Unity SDK version: 2.6.0
Host OS: Windows, MacOS

My name is Junsu Song, a graduate student at POSTECH (Pohang University of Science and Technology) in South Korea. I am currently working with the Magic Leap 2 Developer Pro device and am attempting to deploy content developed in Unity onto the headset.

I got to know more about the Magic Leap 2 device through your documentation and guides, which were incredibly helpful.
I was able to successfully set up my Unity environment using the Magic Leap Setup Tool available on the Unity Asset Store.

However, I am currently encountering an issue I cannot resolve.

After importing and applying the Magic Leap Setup Tool in Unity, when I try to Build or Build and Run for Android, Unity does not export an APK file. Instead, it prompts me to select a folder, as shown in the attached screenshots.

I did not enable the “Export Project” option, so I don’t understand why it’s prompting me to select a folder instead of exporting an APK.
This time, I tried setting everything up based on the instructions in the following YouTube video:

However, the same issue still occurred.

I tested this on both Windows and macOS, using Unity 2022.3 LTS and Unity 6, and the result is the same — the build process always asks for a folder instead of generating an APK.

Could you please help me understand why this is happening?

In addition, I have a few more questions:

  1. In many YouTube videos and guides, I see that there is a Magic Leap tab under Preferences > External Tools.
    However, as shown in my screenshot, I do not see that tab in my setup. I’d like to understand why it’s missing.

  2. In Magic Leap Hub 3, under the Developer tab, I have set the custom ADB path as follows:
    /Applications/Unity/Hub/Editor/6000.1.5f1/PlaybackEngines/AndroidPlayer/SDK/platform-tools/adb
    Is this the correct setup, or is there another recommended configuration?

I’m very excited about building content using Magic Leap 2 and sharing XR experiences with others. I truly appreciate the tools and ecosystem you provide, and I would be grateful for your help in resolving this issue.

Window_Unity2022
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MacOS_Unity6
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Preferences
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2

Hey @JunsuSong the issue you are facing is definitely a tricky one to track down in the Unity editor. The issue is a Player setting that exports APKs based on their architecture. It does so by putting all of them into a folder. The option continues to perform the same way, even when a single architecture is selected.

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Additionally, if you have issues with your application rendering black, make sure you have the standard Activity selected instead of the GameActivity option in the Player settings.

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Unity6_NoAPK
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Thank you very much for your previous response — I really appreciate your help.

On macOS using Unity 2022.3.56f1 LTS, I was able to successfully export an APK file after disabling the Split APKs by target architecture option as shown in the first screenshot you provided.
I then tested Build and Run for Magic Leap 2, and I was happy to see that it worked properly.

However, when I tried using Unity 6000.1.5f1, I encountered a new issue.
As shown in the attached screenshot, the build fails with the following error:

Gradle Error: Resource Not Found
Resource ‘style/BaseUnityGameActivityTheme’ not found in AndroidManifest.xml:88

Because of this error, I’m unable to export the APK.

Would you be able to help me understand what is causing this issue?

Thank you again for your support — I really appreciate it.

4

This is a simple fix
In Assets/Plugins/Android, find the file AndroidManifest.xml
Open it in a text editor

It will have a line that starts with

<activity android:name=“com.unity3d.player.UnityPlayerGameActivity”

And it will have an attribute with value “style/BaseUnityGameActivityTheme”. Remove attribute and value, so you only have

<activity android:name=“com.unity3d.player.UnityPlayerGameActivity”>

And then it will work

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