Just started today to learn Android development, and I just can't find any info on how may I define a `Helper` class, or a collection of functions that will load globally and I'll be able to use them in any Activity that I create.

What I'm planning, is to create (at least for now) 2 functions that will be used almost in every activity, and would be a mess having to define the same functions in every activity.

Which would be the proper way to approach the above?