The Ultimate Guide to Kotlin Programming/

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Updating the RecyclerView

Updating the RecyclerView

We'll cover the following...

Creating an adapter

The RecyclerView uses an adapter to display each row of data. We’ll use a new AirportAdapter class for this purpose, to display the status of each airport.

Create a new Kotlin class file named AirportAdapter.kt that will hold the class AirportAdapter. Let’s start with this initial code for the class in this file:

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package com.agiledeveloper.airports



import android.support.v7.widget.RecyclerView 

import android.view.LayoutInflater

import android.view.View

import android.view.ViewGroup

import kotlinx.android.synthetic.main.airport_info.view.*



class AirportAdapter : RecyclerView.Adapter<AirportViewHolder>() {

}

class AirportViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) { 

}

An adapter inherits from RecyclerView.Adapter<T>, where the parametric type T represents a holder of a view for the data to be displayed. In our implementation, we specialize the parametric type to an AirportViewHolder. The AirportViewHolder class, in turn, inherits from RecyclerView.ViewHolder, which expects an instance ...