Ive gotten processing for android working on my phone (7.1.1) though I have found that not all cables that connect your phone to your computer work, some only transfer power.
Also when you connect your phone a pop up should appear on the phone asking permission to connect to the computer with the computers RSA key
(I would get a screenshot for you but Ive set my phone to remember my laptops RSA key so i dont need to do that)