Detect NReal glasses connection in separate scene

Development & Help
1

I would like users to be able to launch our app without having the glasses connected (ie: without having to go through Nebula for AR features), then have them select a button to move experience onto NReal glasses.

In separate scenes in Unity, this works for the most part. However, if the glasses are not connected, when arriving at a scene that utilizes NReal features, the app will crash. Is there a way in the previous scene (without NReal features) to gracefully detect whether or not the glasses are connected in order to prevent a crash when arriving at scenes that use NReal features?

2

Hi developer. Currently, our Nebula doesn’t support this kind of function. But your suggestion is good, we will take this into consideration.

3

The issue would be that MR features won’t work unless they are launched within Nebula

4

Very late to this, but I needed to solve this today (basically launch my game in a regular Unity scene) then detect if the glasses are connected to choose whether I go to an AR foundation scene or an Nreal scene. Here is the method I made to check if the glasses are connected:

    public static bool IsGlassesConnected()
    {        
        if (AndroidJNI.AttachCurrentThread() == 0)
        {             
                return new AndroidJavaClass("com.unity3d.player.UnityPlayer")
                    .GetStatic<AndroidJavaObject>("currentActivity")
                    .Call<AndroidJavaObject>("getSystemService", new object[] { "usb" })
                    .Call<AndroidJavaObject>("getDeviceList")
                    .Call<AndroidJavaObject>("values")
                    .Call<AndroidJavaObject[]>("toArray")
                    .Any(x => x.Call<int>("getProductId") == 2313); // RGB camera Id    
        }

        return false;
    }

Basically just checks the USB devices and whether one of them has the RGB camera product ID. I am sure there are things that could go wrong, but if you need a quick check, this seems to work.

I then use it like this in my launch scene:

        if (IsGlassesConnected())
        {
            SceneManager.LoadScene("NrealScene");
        }
        else
        {
            SceneManager.LoadScene("PhoneScene");
        }
2 Likes
5

Just back on this. I’ll give this a go thanks.

6

Not sure if this is still any use, but finally got a sample published that creates a single APK supporting both Nreal and ARCore - selecting the scene based on whether the glasses are connected at launch:

martinpgrayson/nreal-multi-platform (github.com)

2 Likes