I am not exactly sure when I need to be changing the versionCode/versionName values in the manifest file before creating a new .apk and putting it on my own device.
Is it ok not to change them at all if I am just going to be testing on my own phone?
Thanks!
No, you can keep it the same if you are just testing on your phone.
Actually, the version codes and the version names come in handy when you are actually publishing your application on the market, enabling the users to know which version they have and what is presently available on the market.
But, since for the time being, you are just testing on your own, you can keep that the same. Won’t be the cause of any problems.