public Observable<DriveId> createFile(DriveFolder folder,File file,String title){
  return createFile(folder,file,title,MimeTypeMap.getFileExtensionFromUrl(file.getPath()));
}

public Observable < DriveId > createFile ( DriveFolder folder , File file , String title ) { return createFile ( folder , file , title , MimeTypeMap . getFileExtensionFromUrl ( file . getPath ( ) ) ) ; }
creates a file on drive
