USB Storage Access on Android

Job ID: 31149641

Budget: $10 – $50 USD

We're developing a card reader application and need to access the contents of a Card Reader connected to an android device through OTG.
This has to be set up without the Media_Mounted Intent, preferably with a device object returned by UsbManager, and should work on all android versions.
No solutions dependant on an external library will be accepted.

If you already have a working solution for it, mention it in the bid.