android studio recyclerview collapsible list

We need a class that represents a single RecyclerView item data, create a file named Data.java and add the following: public class Data The RecyclerView will be a list of randomly chosen movies and a description.

android:clickable='true'Īndroid:foreground='?android:attr/selectableItemBackground' This lines of code will add the ripple effect to the RecyclerView elements. Just a note here: when you create the item layout of the RecyclerView don’t forget to add the following lines in the ViewGroup container of the layout. The row Layout represents the Layout of each single element displayed in the RecyclerView.Ĭreate a file named row_layout.xml and add the following to it: Let’s get started with RecyclerView, you can find the code for the final project on GitHub. Bind the Adapter to the RecyclerView in the Activity.Create the ViewHolder to provide a reference to the views for each data item.Create the RecyclerView.Adapter to populate data into the RecyclerView.Add the RecyclerView in the layout XML file.To use the RecyclerView you need to follow the following steps: The hard part is setting up these classes to make a fully functional RecyclerView and that is what I will cover in this article.

All the other actions needed to create a view, like how to present data set or inflate the views are delegated to the pluggable classes and that is what makes it so flexible. What differentiates the RecyclerView from its predecessors is that it focuses only on recycling views. The RecyclerView is a more flexible pattern of view recycling than ListViews and GridViews. The idea is simple: to present a large collection of data using a small collection of views, by recycling and rebinding these views. The idea of view recycling has been in Android since version 1 in the form of the ListView. If you are getting started with Android development or are already an experienced developer the RecyclerView is something worth investigating. The RecyclerView was introduced with Google’s material design in Android 5.0 Lollipop. This article was updated on February 1, 2017, for Android 7.1 (API level 25)įor more on Android, watch our tutorial Outputting Data to Your Android App’s User Interface.

Android studio recyclerview collapsible list