Unity集成Google Play Games登录失败问题求助

报错信息 #

在移动端和Unity编辑器中均触发以下异常：

Exception: Failed
GPmanager.Start () (at Assets/Scripts/menu/GPmanager.cs:25)
System.Runtime.CompilerServices.AsyncMethodBuilderCore+<>c.<ThrowAsync>b__7_0 (System.Object state) (at <bfbc89a04b6b4dd49c3614d03fc31ce8>:0)
UnityEngine.UnitySynchronizationContext+WorkRequest.Invoke () (at <f7237cf7abef49bfbb552d7eb076e422>:0)
UnityEngine.UnitySynchronizationContext.Exec () (at <f7237cf7abef49bfbb552d7eb076e422>:0)
UnityEngine.UnitySynchronizationContext.ExecuteTasks () (at <f7237cf7abef49bfbb552d7eb076e422>:0)

同时GPManager脚本输出错误：Failed to retrieve Google play games authorization code

GPManager脚本代码 #

public string Token;
public string Error;

void Awake()
{
    PlayGamesPlatform.Activate();
}

async void Start()
{
    await UnityServices.InitializeAsync();
    await LoginGooglePlayGames();
    await SignInWithGooglePlayGamesAsync(Token);
}
//Fetch the Token / Auth code
public Task LoginGooglePlayGames()
{
    var tcs = new TaskCompletionSource<object>();
    PlayGamesPlatform.Instance.Authenticate((success) =>
    {
        if (success == SignInStatus.Success)
        {
            Debug.Log("Login with Google Play games successful.");
            PlayGamesPlatform.Instance.RequestServerSideAccess(true, code =>
            {
                Debug.Log("Authorization code: " + code);
                Token = code;
                // This token serves as an example to be used for SignInWithGooglePlayGames
                tcs.SetResult(null);
            });
        }
        else
        {
            Error = "Failed to retrieve Google play games authorization code";
            Debug.Log("Login Unsuccessful");
            tcs.SetException(new Exception("Failed"));
        }
    });
    return tcs.Task;
}


async Task SignInWithGooglePlayGamesAsync(string authCode)
{
    try
    {
        await AuthenticationService.Instance.SignInWithGooglePlayGamesAsync(authCode);
        Debug.Log($"PlayerID: {AuthenticationService.Instance.PlayerId}"); //Display the Unity Authentication PlayerID
        Debug.Log("SignIn is successful.");
    }
    catch (AuthenticationException ex)
    {
        // Compare error code to AuthenticationErrorCodes
        // Notify the player with the proper error message
        Debug.LogException(ex);
    }
    catch (RequestFailedException ex)
    {
        // Compare error code to CommonErrorCodes
        // Notify the player with the proper error message
        Debug.LogException(ex);
    }
}

已尝试的操作 #

• 重新配置OAuth许可
• 在安卓实体设备和模拟器测试
• 将测试账号加入Google Play Games测试列表
• 使用Google Play内部测试（对应SHA1密钥）
• 测试Unity导出的APK（对应密钥库SHA1密钥）

使用版本 #

• Unity：2022.3.18f1
• GPS plugin：v11.01
• Unity Auth：3.3.1

排查与解决思路 #

1. 补充错误状态日志 #

当前代码仅判断SignInStatus.Success，但success可能返回具体错误类型（如NetworkError、AccountPickerError等），修改LoginGooglePlayGames方法的失败分支，打印详细状态：

else
{
    Error = $"Failed to retrieve authorization code. Status: {success}";
    Debug.Log($"Login failed. Status: {success}");
    tcs.SetException(new Exception($"Failed with status: {success}"));
}

通过具体状态码快速定位是网络、账号还是配置问题。

2. 校验授权码回调结果 #

RequestServerSideAccess的回调中code可能为空，增加非空判断：

PlayGamesPlatform.Instance.RequestServerSideAccess(true, code =>
{
    if (string.IsNullOrEmpty(code))
    {
        Debug.Log("Authorization code is null or empty");
        Error = "Authorization code retrieval failed";
        tcs.SetException(new Exception("Authorization code is null"));
        return;
    }
    Debug.Log("Authorization code: " + code);
    Token = code;
    tcs.SetResult(null);
});

避免因空值导致后续认证流程异常。

3. 验证OAuth客户端ID配置 #

• 确保Google Cloud Console中配置的Web应用客户端ID（非安卓客户端ID）已正确填入Unity项目的Services > Authentication > Google Play Games中
• 确认OAuth许可范围包含https://www.googleapis.com/auth/games

4. 优化插件初始化逻辑 #

• 开启插件调试日志，查看内部错误详情：

void Awake()
{
    var config = new PlayGamesClientConfiguration.Builder()
        .RequestServerAuthCode(false) // 根据需求调整，true需绑定Web客户端ID
        .Build();
    PlayGamesPlatform.InitializeInstance(config);
    PlayGamesPlatform.DebugLogEnabled = true;
    PlayGamesPlatform.Activate();
}

5. 编辑器环境特殊配置 #

• 确保安装Google Play Games for Editor插件
• 在Window > Google Play Games > Setup > Android Setup中配置测试账号，检查编辑器登录时是否有浏览器弹窗被拦截

6. 核对包名与密钥一致性 #

• 确认Google Play Console中的应用包名与Unity导出包名完全一致
• 检查Google Play Console中添加的SHA1指纹包含：Unity编辑器调试密钥、发布密钥库、内部测试版本密钥的SHA1

7. 版本兼容性排查 #

• 尝试升级GPS plugin至最新稳定版，或回退到与Unity 2022.3兼容的版本（部分新版本可能存在适配问题）
• 参考Unity官方文档，确认Unity Auth与GPS plugin版本兼容

内容的提问来源于stack exchange，提问作者Joshu