So create a new class that extends the RecyclerView.ViewHolder class, and initialize references to both the widgets inside it. Without it, the RecyclerView widget will not be able to render the list items efficiently.įor now, you need a view holder that holds the two TextView widgets you created in the previous step. You can think of a view holder as an object that contains references to the views present in the layout of the list items. If you use a LinearLayout element to position the widgets, the contents of the XML file should look like this: Inside it, add two TextView widgets: one to display the name, and the other to display the phone number. To specify the layout of the list items, create a new XML file and call it list_item.xml. So add a tag to your main activity's layout XML file. We will, of course, be using a RecyclerView widget to display the list. You can now go ahead and create a list of Person objects in your main activity. To store the data of each list item, create a Kotlin data class called Person and add two properties to it: name and phone. Throughout this tutorial, we'll be working with a small list of items, each containing a person's name and phone number. Implementation ':recyclerview-selection:28.0.0' 2. To add the RecyclerView Selection library to your Android Studio project, mention the following implementation dependencies in your app module's adle file: implementation ':recyclerview-v7:28.0.0'

a device or emulator running Android API level 23 or higher.

Follow along with this Android RecyclerView multiple selection example, and you'll learn some skills you can apply in your own apps.

In this tutorial, I'll show you how to use the new library to create an app that offers an intuitive interface for selecting multiple items in a list. RecyclerView Selection, an addon library Google released in March this year, tries to fix this. However, there's one important feature missing in it: support for selecting and tracking list items. Ever since it was added to the Android support library in late 2014, it has eclipsed the ListView widget as the most preferred widget for displaying large, complex lists.

The RecyclerView widget is an integral part of most Android applications today.

Android studio recyclerview