App to display and save orientation sensor data

Hello, I am working on a project that I need to be able to collect data from a phone to prove my theory. This android application will simply create a plainTextView, have a start button, display the X:Y:Z numbers of the orientation sensor in plain text as the phone is moved about. The values should be saved to a csv file stored on a memory card for later analysis. The file name should be automatically selected as mm-dd-yyyy-h-m-s. csv file should be simple x-value,y-value,z-value once i am ready to stop capturing data the button I pushed to start the app should now stop it. I want to keep this app as simple as possible and can not afford to spend a lot of money on it since it is for testing purposes only.