Here is the idea: A reaction time test for children for scientific research on an Android tablet. The children have to tap a button on certain events. The reaction time gets stored in a file (preferably a .txt or similar) which we can later transfer to a computer to evaluate the data.
I have no idea how to start... Should I store the data in variables and send the values to a file? And if so how do I manage to create such a file?
I've read some where that AJAX is the key here but because I have no experience with web coding I don't know how to do it.