Question

我正在尝试使用GoogleDriveApi在文件夹内创建文件。创建文件夹后，可以直接使用DriveFolder中的SuccessListener在其中创建文件。但是我不知道以后如何在其中创建文件...因为dF.getDriveId().encodeToString()不起作用，所以以后不能再创建DriveFolder对象。

CreateFolder：

Drive.getDriveResourceClient(getActivity(), gsa)
    .getRootFolder()
    .continueWithTask(new Continuation<DriveFolder, Task<DriveFolder>>() {
        @Override
        public Task<DriveFolder> then(@NonNull Task<DriveFolder> task) throws Exception {
            DriveFolder parentFolder = task.getResult();
            MetadataChangeSet changeSet = new MetadataChangeSet.Builder()
                    .setTitle("Foo")
                    .setMimeType(DriveFolder.MIME_TYPE)
                    .setStarred(true)
                    .build();
            return Drive.getDriveResourceClient(getActivity(), gsa).createFolder(parentFolder, changeSet);
        }
    })
    .addOnSuccessListener(new OnSuccessListener<DriveFolder>() {
        @Override
        public void onSuccess(DriveFolder dF){
            //Here I get the DriverFolder Object.
            driveFolder = df;
        }
    });

CreateFile：

final Task<DriveFolder> rootFolderTask = Drive.getDriveResourceClient(getActivity(), gsa).getRootFolder();
final Task<DriveContents> createContentsTask = Drive.getDriveResourceClient(getActivity(), gsa).createContents();
Tasks.whenAll(rootFolderTask, createContentsTask)
    .continueWithTask(new Continuation<Void, Task<DriveFile>>() {
        @Override
        public Task<DriveFile> then(@NonNull Task<Void> task) throws Exception {

            DriveContents contents = createContentsTask.getResult();
            OutputStream outputStream = contents.getOutputStream();
            ByteArrayOutputStream bitmapStream = new ByteArrayOutputStream();
            BitmapFactory.decodeFile("path").compress(Bitmap.CompressFormat.PNG, 100, bitmapStream);
            try {
                outputStream.write(bitmapStream.toByteArray());
            } catch (IOException e1) {
                Log.i("ERROR", "Unable to write file contents.");
            }
            MetadataChangeSet changeSet = new MetadataChangeSet.Builder()
                    .setTitle("Foo.png")
                    .setMimeType("image/png")
                    .setStarred(true)
                    .build();
            //use driveFolder from CreateFolder
            return Drive.getDriveResourceClient(getActivity(), gsa).createFile(driveFolder, changeSet, contents)
        }
    });

Answer 1

我用Drive.getDriveClient(this, gsa).newOpenFileActivityIntentSender打开FilePicker解决了问题，并让用户选择了该文件夹。在onActivityResult中，我得到data.getExtras().get("response_drive_id")的DriveId。使用Drive.getDriveClient(this, gsa).getDriveId(driveId.getResourceId)，我可以重新创建DriveID对象并将文件上传到该对象。而已。

但是，在创建文件夹之后，我仍然想知道如何在driveFolder.getDriveId().getResourceId()中获得onSuccess。

在Google云端硬盘文件夹中创建文件

1 个答案: