Does anyone know an open source app that uses several different cloud storage services (like Drive, Dropbox etc.)? I want to implement file synchronization into my Android app with an "interface" to easily switch and add cloud storage services. Any ideas? Otherwise I would have to start from scratch.
You need to implement their api which you want to sync (Like. dropbox, google drive).
Because their api need to apply api key and import it to your project so that their don't have one api can implement all cloud storage service.
In my experience, cloud storage api is easy to use so that you can implement it very easily.
They have tutorial so that you can implement that step by step
Google Drive api
Dropbox api
Skydrive api