After a rather interesting StackOverflow question, I got thinking about different types of efficiency in Java and, consequently, Android.
Based on a question I answered on StackOverflow, I thought it would be a good idea to put this out in public for everyone to see.
This is an example of PasswordTransformationMethod that, in a password field, would display a paradigmic asterisk *, instead of the generic dot •.
A basic Java class that allows storage of multiple values per key. It uses a HashMap on top of a List to dictate the organization of the data.