I have been searching for a solution to progress bar with PostMultipart upload in B4J platform, but could get any. I would like to show progress of an upload that is done with the okHttpUtil lib. Using Postmultipart developers can upload files like images and videos to the internet with ease. The only part that is missing is the progress of the upload when the file is big this is necessary so that the user can get notified of the status of the upload. Can anyone help me or give some example code on how this is done.