Unity2017にAdmobメディエーションでAppLovinSDKをいれたら、UnityEditor上でエラーがでる

エラー「Exception: JNI: Init'd AndroidJavaClass with null ptr!」

Exception: JNI: Init'd AndroidJavaClass with null ptr!
UnityEngine.AndroidJavaClass..ctor (System.IntPtr jclass) (at /Users/builduser/buildslave/unity/build/Runtime/Export/AndroidJavaImpl.cs:622)
UnityEngine.AndroidJavaObject.get_JavaLangClass () (at /Users/builduser/buildslave/unity/build/Runtime/Export/AndroidJavaImpl.cs:600)
UnityEngine.AndroidJavaObject.FindClass (System.String name) (at /Users/builduser/buildslave/unity/build/Runtime/Export/AndroidJavaImpl.cs:591)
UnityEngine.AndroidJavaClass._AndroidJavaClass (System.String className) (at /Users/builduser/buildslave/unity/build/Runtime/Export/AndroidJavaImpl.cs:611)
UnityEngine.AndroidJavaClass..ctor (System.String className) (at /Users/builduser/buildslave/unity/build/artifacts/generated/common/runtime/AndroidJavaBindings.gen.cs:92)
AppLovin.getDefaultPlugin () (at Assets/Plugins/AppLovin/AppLovin.cs:106)
AppLovin.SetSdkKey (System.String sdkKey) (at Assets/Plugins/AppLovin/AppLovin.cs:560)
GameSceneSingleton.RequestRewardBasedVideo () (at Assets/Scripts/Common/GameSceneSingleton.cs:232)
GameManager.Awake () (at Assets/Scripts/Common/GameManager.cs:371)

原因は、unitypackageで入れている、applovinの初期化が原因でした。

AppLovin.SetSdkKey(Constant.SDK_APPLOVIN_API_KEY);
AppLovin.InitializeSdk();

この部分

下記のように、UnityEditor上は何も処理しないように分岐するとエラーがなくなりました。

# if UNITY_EDITOR
// Do not process with unityEditor

# elif UNITY_ANDROID
// AppLovin
AppLovin.SetSdkKey(Constant.SDK_APPLOVIN_API_KEY);
AppLovin.InitializeSdk();


# elif UNITY_IOS
# endif