When mapping edit text fields, select boxes and other elements that have GUI interaction with the user within Android Activity Java code, the first thing you need to know is the resource id where the data will be coming from. Flipping back and forth between the xml resources and the Activities is a pain. Be sure to put a comment in your code next to the variable that indicates the xml resource id like below. This easy piece of documentation and code commenting is invaluable to the developers who will be maintaining your code
private EditTextView mPersonId; // R.id.PersonIdETV
private Spinner mPersonJob; // R.id.PersonJobSPN
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