Google Drive Android API - 无效的 DriveId 和 Null ResourceId

The problem is that the folder gets created successfully but inside onResult(), I always get a DriveId or resourceId that is invalid or incomplete. That means I cannot create a file inside the folder I created. Here is the code I am using:

public class CreateFolderActivity extends BaseDemoActivity {

@Override
public void onConnected(Bundle connectionHint) {
    super.onConnected(connectionHint);
    MetadataChangeSet changeSet = new MetadataChangeSet.Builder()
            .setTitle("MyAppFolder").build();
    Drive.DriveApi.getRootFolder(getGoogleApiClient()).createFolder(
            getGoogleApiClient(), changeSet).setResultCallback(callback);
}

final ResultCallback<DriveFolderResult> callback = new ResultCallback<DriveFolderResult>() {
    @Override
    public void onResult(DriveFolderResult result) {
        if (!result.getStatus().isSuccess()) {
            showMessage("Error while trying to create the folder");
            return;
        }

        // this value is always invalid with ending == operators
        Log.d("DRIVEID", "Created a folder: " + result.getDriveFolder().getDriveId());
    }
  };
}

每当我运行此代码时，我都会得到以下看起来不完整的 id:

CAESABi2VyCCzdWOuVMoAQ==