Handling user interactions

User interaction is the most important aspect of developing a mobile application. A mobile app should be interactive and easy to use.

In this basic application, we will be writing our user interaction code in C# and it will be part of the MainActivity.cs file:

1. Let's click on the MainActivity.cs file from the Solution Explorer on the left and open it:

It has some autogenerated code that we are going to modify in order to make our application work.

2. We need to write our code inside the OnCreate() method of the MainActivity.cs file:

Before we start writing user interaction code, let's understand the autogenerated code first:

base.OnCreate(savedInstanceState); 

This piece of code calls the OnCreate() method of the parent/base class of MainActivity.cs, which is Activity.cs.

SetContentView(Resource.Layout.Main); 

As the comments already say, it sets the view from our layout resource file, Main.axml.

We need to write our SetContentView(Resource.Layout.Mai) code.

3. First, get a reference...