Android App Development - Common Folder for different user to upload their files without entering authentication (username pass.)

[Moved to API Development forum]

The API was designed with the intention that each user would link their own Dropbox account, in order to interact with their own files. However, it is technically possible to connect to just one account. The SDKs don't offer explicit support for it and we don't recommend doing so, for various technical and security reasons.

However if you did want to go this route, instead of kicking off the normal API app authorization flow (or embedding your username and password, which is definitely not recommended), you would manually use an existing access token for your account and app. That is, you'd need to process the app authorization flow for your account once to get the access token. Just be careful not to revoke it, e.g. via https://www.dropbox.com/account/security .