C# 针对Xamrin.Android的Google Drive ApI V3迁移

请告诉我如何迁移到Google Drive API v2或V3。我找到了与java相关的迁移的所有答案。我找不到与Google Drive API v2或V3等效的xamarin nuget包

我尝试过这个Xamarin.GooglePlayServices.Drivenuget包，但是在这个包中，所有的驱动api都被去除了

有人能在xamarin中尝试google drive集成吗？请帮助我。这是我的尝试

    GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DefaultSignIn)
                .RequestEmail()
                .Build();

    var mGoogleApiClient = new GoogleApiClient.Builder(this)
                .EnableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */)
                .AddApi(Auth.GOOGLE_SIGN_IN_API, gso)
                .Build();


     MetadataChangeSet changeSet = new MetadataChangeSet.Builder()
            .SetTitle(_backupFolderName)
            .Build();
        IDriveFolderDriveFolderResult result;
        try
        {
            result = await DriveClass.DriveApi.GetRootFolder(_googleApiClient)
                .CreateFolderAsync(_googleApiClient, changeSet);
        }
        catch (Exception)
        {
            return null;
        }

---

我找不到任何支持Xamarin和OAuth身份验证的google drive nuget包。因此，我找到了使用Http客户端RESTAPI的方法

请按照以下步骤操作

使用Google开发者控制台创建OAuth客户端id

将客户端Id与重定向等其他信息一起使用

public class GoogleAuthenticator : OAuth2Authenticator
{
public static OAuth2Authenticator Auth;

public GoogleAuthenticator(string clientId, string scope, Uri authorizeUrl, Uri redirectUrl,
    GetUsernameAsyncFunc getUsernameAsync = null, bool isUsingNativeUi = false) : base(clientId, scope,
    authorizeUrl, redirectUrl, getUsernameAsync, isUsingNativeUi)
{
    Auth = new OAuth2Authenticator(clientId, string.Empty, scope,
        authorizeUrl,
        redirectUrl,
        new Uri(GoogleDriveConfig.AccessTokenUri),
        null, true);

    Auth.Completed += OnAuthenticationCompleted;
    Auth.Error += OnAuthenticationFailed;
}

public void OnAuthenticationCompleted(object sender,AuthenticatorCompletedEventArgs e)
{
    if (e.IsAuthenticated)
    {
        AuthenticationCompleted?.Invoke(e.Account.Properties["access_token"],
            e.Account.Properties["refresh_token"], e.Account.Properties["expires_in"]);
    }

}

public void OnAuthenticationFailed(object sender, AuthenticatorErrorEventArgs e)
{

}

启动浏览器

public void SignInToDrive(Activity context)
  {
    Intent loginUi = Auth.GetUI(context);

    CustomTabsConfiguration.IsShowTitleUsed = false;
    CustomTabsConfiguration.IsActionButtonUsed = false;
    context.StartActivity(loginUi);
  }

创建GoogleAuthorInterceptor活动

  [Activity(Label = "GoogleAuthInterceptor")] 
  [  IntentFilter ( actions: new[] 
  {Intent.ActionView}, 
   Categories = new[] { Intent.CategoryDefault, 
  Intent.CategoryBrowsable }, 
  DataSchemes = new[] {"YOUR PACKAGE NAME"}, DataPaths = new[] { "/oauth2redirect" 
   } ) ]

  public class GoogleAuthInterceptor : Activity
 {
   protected override void OnCreate(Bundle savedInstanceState)
  {
    base.OnCreate(savedInstanceState);
    Uri uriAndroid = Intent.Data;

    System.Uri uri = new System.Uri(uriAndroid.ToString());

        var intent = new Intent(ApplicationContext, typeof(MainActivity));
        intent.SetFlags(ActivityFlags.ClearTop | ActivityFlags.SingleTop);
        StartActivity(intent);

    GoogleAuthenticator.Auth.OnPageLoading(uri);

    Finish();
    return;
}
}

上传文件到谷歌硬盘

private async Task<bool> UpdateFile(string accessToken,string fileId,long fileSize,Stream stream)
{
   HttpRequestMessage sessionRequest = new HttpRequestMessage(new HttpMethod("PATCH"), "upload/drive/v3/files/" + $"{fileId}");
    sessionRequest.Headers.Add("Authorization", "Bearer " + accessToken);
    sessionRequest.Headers.Add("X-Upload-Content-Type", "*/*");
    sessionRequest.Headers.Add("X-Upload-Content-Length", fileSize.ToString());
    sessionRequest.Content = new StreamContent(stream);
    sessionRequest.Content.Headers.ContentType = new MediaTypeHeaderValue("*/*");

    using (var response = await _httpClient.SendAsync(sessionRequest))
    {
        return response.IsSuccessStatusCode;
    }
}

此基本地址适用于以下所有google drive API

HttpClient\u HttpClient=HttpClient？？新的HttpClient
{
BaseAddress=新Uri（），
};
专用异步任务CreateResumableSession（字符串accessToken、字符串文件名、长文件大小、字符串folderId）
{
var sessionRequest=new
HttpRequestMessage（HttpMethod.Post，“upload/drive/v3/files？uploadType=resubable”）；
sessionRequest.Headers.Add（“授权”、“承载人”+accessToken）；
sessionRequest.Headers.Add（“X-Upload-Content-Type”，“*/*”）；
sessionRequest.Headers.Add（“X-Upload-Content-Length”，fileSize.ToString（））；
字符串正文=“{\'name\”：\”+fileName+“\”，\“parents\”：[\”“+folderId+“\”]}”；
sessionRequest.Content=新的StringContent（body）；
sessionRequest.Content.Headers.ContentType=新的MediaTypeHeaderValue（“应用程序/json”）；
使用（var sessionResponse=await_httpClient.SendAsync（sessionRequest））
{
返回会话响应；
};

更新谷歌硬盘中的文件

private async Task<bool> UpdateFile(string accessToken,string fileId,long fileSize,Stream stream)
{
   HttpRequestMessage sessionRequest = new HttpRequestMessage(new HttpMethod("PATCH"), "upload/drive/v3/files/" + $"{fileId}");
    sessionRequest.Headers.Add("Authorization", "Bearer " + accessToken);
    sessionRequest.Headers.Add("X-Upload-Content-Type", "*/*");
    sessionRequest.Headers.Add("X-Upload-Content-Length", fileSize.ToString());
    sessionRequest.Content = new StreamContent(stream);
    sessionRequest.Content.Headers.ContentType = new MediaTypeHeaderValue("*/*");

    using (var response = await _httpClient.SendAsync(sessionRequest))
    {
        return response.IsSuccessStatusCode;
    }
}

private async Task UpdateFile（字符串accessToken、字符串fileId、长文件大小、流）
{
HttpRequestMessage sessionRequest=新的HttpRequestMessage（新的HttpMethod（“补丁”），“upload/drive/v3/files/”+$“{fileId}”）；
sessionRequest.Headers.Add（“授权”、“承载人”+accessToken）；
sessionRequest.Headers.Add（“X-Upload-Content-Type”，“*/*”）；
sessionRequest.Headers.Add（“X-Upload-Content-Length”，fileSize.ToString（））；
sessionRequest.Content=新的流内容（流）；
sessionRequest.Content.Headers.ContentType=新的MediaTypeHeaderValue（“*/*”）；
使用（var response=await_httpClient.sendsync（sessionRequest））
{
返回response.IsSuccessStatusCode；
}
}

下载文件

  public async Task<Stream> DownloadFile(string accessToken, string fileId)
{
    var request = new HttpRequestMessage(HttpMethod.Get,"drive/v3/files"+ $"/{fileId}" + "?fields=*&alt=media");
    request.Headers.Add("Authorization", "Bearer " + accessToken);

    var response = await _httpClient.SendAsync(request);

    if (response.IsSuccessStatusCode)
    {
        var contents = await response.Content.ReadAsStreamAsync();
        return contents;
    }

    return null; 
}

public异步任务下载文件（string accessToken，string fileId）
{
var request=newhttprequestmessage（HttpMethod.Get，“drive/v3/files”+$“/{fileId}”+“？fields=*&alt=media”）；
添加（“授权”、“承载人”+accessToken）；
var response=await\u httpClient.sendsync（请求）；
if（响应。IsSuccessStatusCode）
{
var contents=await response.Content.ReadAsStreamAsync（）；
返回内容；
}
返回null；
}

获取所有文件

public  async Task<GoogleDriveItem> GetFiles(string folderId, string accessToken)
{  
    var request = new HttpRequestMessage(HttpMethod.Get,
        "drive/v3/files" +"?q=parents%20%3D%20'" +
        $"{folderId}" +
        "'%20and%20trashed%20%3D%20false&fields=files(id%2Cname%2Ctrashed%2CmodifiedTime%2Cparents)");
    request.Headers.Add("Authorization", "Bearer " + accessToken);
    request.Headers.Add("Accept", "application/json");
    request.Headers.CacheControl = new CacheControlHeaderValue() { NoCache = true 
    };

    using (var response = await _httpClient.SendAsync(request))
    {
        var content = await response.Content.ReadAsStringAsync();
        return (JsonConvert.DeserializeObject<GoogleDriveItem>(content));
    }
}

公共异步任务GetFiles（字符串folderId、字符串accessToken）
{  
var请求=新的HttpRequestMessage（HttpMethod.Get，
“驱动器/v3/文件”+“？q=parents%20%3D%20'”+
$“{folderId}”+
““%20和%20垃圾%20%3D%20false&fields=文件（id%2Cname%2Ctrashed%2CmodifiedTime%2Cparents）”；
添加（“授权”、“承载人”+accessToken）；
添加（“接受”、“应用程序/json”）；
request.Headers.CacheControl=new CacheControlHeaderValue（）{NoCache=true
};
使用（var response=wait_httpClient.SendAsync（请求））
{
var content=await response.content.ReadAsStringAsync（）；
返回（JsonConvert.DeserializeObject（content））；
}
}

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你找到什么了吗？我现在也有同样的问题。是的。我努力了很多，终于找到了。如果你仍然没有找到。请评论。我将上传答案，这将非常有帮助，谢谢。我现在没有笔记本电脑。我将上传明天的答案，没有问题！谢谢你的回复，我有一个问题：

OAuth2Authenticator在哪里来自？好的，找到了。是Xamarin.Auth。如果您不介意的话，如果我还有任何问题，我会告诉您的。再次感谢