Observables & Observer: //Observable const testObservable = new Observable(subscriber => { subscriber.next("RED"); subscriber.next("GREEN"); subscriber.next("BLUE"); setTimeout(() => { subscriber.next("WHITE"); subscriber.next("YELLOW"); subscriber.complete(); }, 1000); }); // observer const testObserver = { next: function(value: any) { console.log(value); }, error…

Generics : In programming building components that not only have well-defined and consistent APIs, but also reusable. Using generics we can create reusable component that supports variety of types rather than single one. For example let’s take one function that should accepts input as all types function result(input: any) …

Object-oriented programming is programming paradigm based on the concept of objects, which can contain data, in the form of fields, and code, in the form of procedures. Classes : Class is user defined blueprint, it represents set of properties or methods that are common to all objects of one type.

It is part of android architectural components. It helps you to implement navigation from simple clicks to complex patterns Navigation component simplifies navigation between fragments, Passing data between fragments and animations etc.. Entire app navigation information at one centralised location Navigation component has mainly Navigation Graph : It is an XML resource, It…

Most professional Android application developers are aware of the Guide to App Architecture, which is a great source of knowledge for building Android applications according to best practices. If you haven’t read that yet, I would suggest you do so before continuing on with this article. You’ll want to be…