I'd like to upload files created by app users to a single pre-specified Dropbox account. Basically, this is like using Dropbox as ftp server with single login, but hopefully more secure. How can this be done? All the Dropbox tutorials show how to link to user's private account, which is not what is needed.
A non-Dropbox solution which does not require much coding would also be welcome. For example, an alternative could be to use SFTP, but there seems to be no standard stable SFTP library for Android.