使用Xamarin.Android将文件上传到google drive文件夹

我想使用Xamarin.Andriod在google驱动器（而不是默认位置）的特定文件夹中创建文件

我正在使用以下代码

MetadataChangeSet changeSetfile = new MetadataChangeSet.Builder() .SetTitle("Test.jpg") .SetMimeType("image/jpeg") .Build(); DriveClass.DriveApi .GetRootFolder(_googleApiClient) .CreateFile(_googleApiClient, changeSetfile, contentResults.DriveContents); 

Answer 1

1. 实施GoogleApiClient.IConnectionCallbacks

2. 使用DriveClass.API和DriveClass.ScopeFile获取DriveClass.ScopeFile

GoogleApiClient示例：

 if (_googleApiClient == null) // _googleApiClient is a class level variable { _googleApiClient = new GoogleApiClient.Builder(this) .AddApi(DriveClass.API) .AddScope(DriveClass.ScopeFile) .AddConnectionCallbacks(this) .AddOnConnectionFailedListener(onConnectionFailed) .Build(); } if (!_googleApiClient.IsConnected) _googleApiClient.Connect(); 

3. 连接后，查询文件夹，根据需要创建，然后“写入”文件。

文件夹和文件示例：

 var folderName = "StackOverflow"; using (var driveId = DriveClass.DriveApi.GetRootFolder(_googleApiClient)) using (var query = new QueryClass.Builder().AddFilter(Filters.And(Filters.Eq(SearchableField.Title, folderName), Filters.Eq(SearchableField.Trashed, false))).Build()) using (var metaBufferResult = await driveId.QueryChildrenAsync(_googleApiClient, query)) { if (metaBufferResult.Status.IsSuccess) { DriveId folderId = null; foreach (var metaData in metaBufferResult.MetadataBuffer) { if (metaData.IsFolder && metaData.Title == folderName) { folderId = metaData.DriveId; break; } } IDriveFolder driveFolder = null; switch (folderId) { case null: // if folder not found, create it and fall through to default using (var folderChangeSet = new MetadataChangeSet.Builder().SetTitle(folderName).Build()) using (var folderResult = await driveId.CreateFolderAsync(_googleApiClient, folderChangeSet)) { if (!folderResult.Status.IsSuccess) { Log.Error(TAG, folderResult.Status.StatusMessage); break; } driveFolder = folderResult.DriveFolder; } goto default; default: driveFolder = driveFolder ?? folderId.AsDriveFolder(); // create your file in the IDriveFolder obtained, using (var contentResults = await DriveClass.DriveApi.NewDriveContentsAsync(_googleApiClient)) { if (contentResults.Status.IsSuccess) { using (var writer = new OutputStreamWriter(contentResults.DriveContents.OutputStream)) { writer.Write("StackOverflow Rocks"); using (var changeSet = new MetadataChangeSet.Builder() .SetTitle("StackOverflow Rocks") .SetStarred(true) .SetMimeType("text/plain") .Build()) using (var driveFileResult = await driveFolder.CreateFileAsync(_googleApiClient, changeSet, contentResults.DriveContents)) { if (driveFileResult.Status.IsSuccess) Log.Debug(TAG, "File created, open https://drive.google.com to review it"); else Log.Error(TAG, driveFileResult.Status.StatusMessage); } } } } driveFolder.Dispose(); break; } folderId?.Dispose(); } else { Log.Error(TAG, metaBufferResult.Status.StatusMessage); } } 

笔记：

• 在后台线程上执行此操作
• 驱动器允许多个具有相同名称的文件/文件夹（ Title ）
  • 如果要替换现有文件，请查询现有文件
  • 查询现有文件夹，除非您确实具有相同Title多个文件夹
• 除非排除，否则“ Trash中的文件夹和文件将返回查询。
• 使用Using块和Dispose来避免泄漏