Android Development with Kotlin

Network definition

Until now, the presented data has been hardcoded inside the application, but we want to use data from the Marvel API instead. To do this, we need to define some network mechanisms that will retrieve the data from the server. We are going to use Retrofit, a popular Android library used to simplify network operations, together with RxJava, a popular library used for reactive programming. For both libraries, we will use only basic functionalities to make their usage as simple as possible. To use them, we need to add the following dependencies in the build.gradle module:

dependencies { 
   implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:   $kotlin_version" 
   implementation "com.android.support:appcompat-v7: $android_support_version" ...