Typically android apps are going to be secured with a redirect-based flow. Usually the auth code + PKCE grant type. This does not require your application to ever handle a password or username, which is part of what makes the process secure. You can have a non-browser based flow with auth0 but we typically recommend Universal Login. Here are some useful resources.
I recommend taking a look at the following doc when considering your options:
Unfortunately our UX requirements enforce that we use a native-based flow.
I have been trying to find relevant docs and examples for native Android and iOS implementations and a lot of examples/docs are missing crucial information, lets take this one as an example:
There is no 01 and 02 and besides that the 02 part is linked in another GitHub repo, which redirects to a 404.
Could you please link us to the latest and the best way to implement authentication natively in our Android and iOS apps?
I can’t find any more relevant examples of native android implementations. I am looking for the 02 link you mentioned so I can report it and attempt to get it fixed.
Again, I apologize for the difficulty in implementing what you requested.