Written by Dawid Sibińskion Today we’re going to take a look at Android’s most basic and in the same time most important concept, which is an Activity. To create even the simplest “HelloWorld” app one should to know what are the Activities and how to work with them.What is an Activity ? The simplest, an Activity is a single screen in Android application. The concept of Activities is unusual in programming and it’s specific to Android platform. Every Activity in Xamarin consists of two components:UI (...