Linking sources?

Question

Mobile development

I created my project in android studio, but then I found a suitable source for the implementation of the next step, the question is: how to connect these sources, if I take separate classes, how to make them work, where to write the codes? I'm a beginner, don't judge strictly, as I understand it will be necessary to associate classes with layouts?

Answer 1

1. I advise you to first study the structure of the android application, or formulate the question more specifically.
2. To work with individual classes, it is not necessary to associate them with the layout if their external display is not required. If display is required, then you need to additionally study the original layout. Yes, and it would be nice to carefully examine the manifest file, in order to add some new permissions to it.