Learning Concurrency in Kotlin

Mapping the data

For our adapter to work, it needs to know how to create a ViewHolder and how to replace its contents, and it needs to be able to return the amount of elements that it currently has. The first step is to extend RecyclerView.Adapter using our own ViewHolder as the type:

class ArticleAdapter : RecyclerView.Adapter<ArticleAdapter.ViewHolder>() {    ...}

Once this is done, we will be requested to implement three functions:

• onCreateViewHolder(): This is called each time a new ViewHolder needs to be created; it will inflate all the views as needed and return a ViewHolder ready to be used.
• onBindViewHolder(): This is called to load/replace the content of a ViewHolder with the content of the element at a given position. It needs to ...