# Frequently Asked Questions

#### **1 Which Unity version is supported by NRSDK?**

Unity 2019.4.x and above. The LTS(long term support) Unity version is recommended.

#### **2 How is the compatibility between different NRSDK and Android versions?**

The following compatibility assumes the latest Nebula 2.3.4 is installed. Please set the target API level accordingly in `Project Settings -> Player -> Target API Level` when building the application.

<table><thead><tr><th width="188.7257977285019">NRSDK</th><th width="169.17194895852398">Target API Level</th><th width="269.10832815039953">Compatible Android Version</th></tr></thead><tbody><tr><td>NRSDK 1.9.0</td><td>32</td><td>Android 12 and below</td></tr><tr><td>NRSDK 1.8.0</td><td>31</td><td>Android 12 and below</td></tr><tr><td>NRSDK 1.7.0 </td><td>30</td><td>Android 11 and below</td></tr><tr><td>NRSDK 1.6.0</td><td>30</td><td>Android 11 and below</td></tr><tr><td>NRSDK 1.5.7</td><td>29</td><td>Android 10 and below</td></tr></tbody></table>

* It is recommended to upgrade NRSDK integrated with your Unity project to the latest in order to adapt to the newest Android version.  Alternatively, you may choose to configure `target API Level` to `API level 29`while building the application as a workaround to make your app run on newer Android systems and installed via [adb](https://developer.android.com/studio/command-line/adb) tools. However, this is not recommended as it doesn't meet Google Play's target API level requirement.

#### **3 What are supported Android phones for hand tracking?**

Hand Tracking has been fully tested on the following Android phones:

* XREAL Dev-Kit
* OnePlus：9R / 7T / 8T /  8 Pro 5G
* LG：V60 / V50S ThinQ 5G / V50 ThinQ 5G / G9 (Velvet 5G) / Wing
* SONY：Xperia 5 II / Xperia 1
* SAMSUNG：Galaxy Note20 5G / Galaxy S10+ / Galaxy S20+ 5G / Galaxy Z Fold 2 5G / Galaxy S21 5G / Galaxy Note20 Ultra / Galaxy Note10+ 5G / Galaxy A90 5G
* OPPO: Find X2 / Find x2 Pro / Find x3 Pro
* ZTE Axon 10 pro
* Black Shark 2 Pro

Hand tracking can potentially run on devices besides the above, although stability is not guaranteed.&#x20;

#### **4 How many different versions does NRSDK have? What are they?**

NRSDK has three different versions for each release. In most cases, you would get the normal version with the package name "NRSDKForUnityAndroid\_x.x.x" from the [official website](https://developer.nreal.ai/download). Apart from that, NRSDK also has **Experimental** and **Enterprise** versions.&#x20;

**Experimental** version includes features under experimental phases as introduced under *EXPERIMENTAL* section in this documentation.

For the **Enterprise** version, it is possible to access glasses raw data(grayscale camera & IMU) through its APIs.&#x20;

If interested, please contact us through the [official website](https://www.nreal.ai/contact-us/) to get access.

#### **5 Through which API can I get the user's device (XREAL Light/Air) my apk is running on?**

`NRDeviceType NRKernal.NRDeviceSubsystem.GetDeviceType()`

#### 6 Error occurs when building an apk

{% code overflow="wrap" lineNumbers="true" %}

```log
UnityException: Error
mainTemplate.gradle file is using the old aaptOptions noCompress property definition which does not include types defined by unityStreamingAssets constant.
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&) (at /Users/bokken/build/output/unity/unity/Modules/IMGUI/GUIUtility.cs:189)
```

{% endcode %}

Modify the file mainTemplate.gradle:&#x20;

{% code title="mainTemplate.gradle" overflow="wrap" %}

```xml
aaptOptions {
        noCompress = ['.unity3d', '.ress', '.resource','unityStreamingAssets', '.obb'**STREAMING_ASSETS**]
    }**SIGN**
```

{% endcode %}