Vuzix Blade上的Firebase (Unity SDK)：OnTokenReceived从未触发

Question

我正在尝试让Firebase在Vuzix Blade上的Unity项目中运行，以便在那里接收推送通知。然而，OnTokenReceived回调从未被调用过，所以我没有得到任何令牌来处理推送通知。

Vuzix Blade在Android 5上运行，我已经安装了Google Play Services和Google Play Store，因为它们不是默认安装的，而是Firebase需要的。Firebase.DependencyStatus.Available似乎正常启动，或者至少我在logcat上没有得到任何错误消息，并且Firebase正确地以Firebase结束。

同样的apk在我的安卓手机(OnePlus 5)上运行得很好，我可以得到一个令牌，并且可以在应用运行时和后台接收通知。

我使用的是Unity 2018.3和Firebase SDK 5.7.0 (但结果与5.6.0相同)。

private void Awake()
{
    Firebase.FirebaseApp.CheckAndFixDependenciesAsync().ContinueWith(
            task =>
            {
                var dependencyStatus = task.Result;

                if ( dependencyStatus == Firebase.DependencyStatus.Available ) // this is always true
                {
                    // Create and hold a reference to your FirebaseApp,
                    // where app is a Firebase.FirebaseApp property of your application class.
                    m_kFirebaseApp = Firebase.FirebaseApp.DefaultInstance;

                    // Set a flag here to indicate whether Firebase is ready to use by your app.
                    Firebase.Messaging.FirebaseMessaging.TokenRegistrationOnInitEnabled = true;
                    Firebase.Messaging.FirebaseMessaging.TokenReceived += OnTokenReceived;
                    Firebase.Messaging.FirebaseMessaging.MessageReceived += OnMessageReceived;
                } 
                else
                {
                    Debug.LogError(string.Format("Could not resolve all Firebase dependencies: {0}", dependencyStatus ) );
                    // Firebase Unity SDK is not safe to use here.
                }
            } );
}

// This never gets called!
public void OnTokenReceived(object sender, Firebase.Messaging.TokenReceivedEventArgs token )
{
    m_kToken = token.Token;
    Debug.Log( "Received Registration Token: " + token.Token );
}

Answer 1

刀片式服务器不是CTS兼容设备吗？这将不允许Firebase在其上工作，因为Firebase SDK需要设备启用Google Mobile Services (GMS)才能运行。