RecyclerView Adapter :- Creating a Reusable Generic Adapter for RecyclerView in Android Studio

Опубликовано: 20 Март 2025
на канале: CodeLytical

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In this tutorial, we will learn how to create a custom adapter for RecyclerView in Android using Kotlin. The provided code showcases the implementation of a flexible and reusable Generic Adapter that can handle various data types with different layouts and click event handling.

The Generic Adapter class is defined with a generic type parameter T, allowing it to handle any data type provided. The adapter accepts the application context, a map of layout resource IDs for different view types, functions to bind the data to the view and handle item click events, and an option to enable the use of a data singleton.

Within the adapter, the onCreateViewHolder, onBindViewHolder, and getItemCount methods are implemented to meet the requirements of the RecyclerView.Adapter. These methods handle the inflation of the item view, binding the data to the view holder, and returning the total item count, respectively.

The setItems function is provided to seamlessly update the data set. It utilizes the DiffUtil library to calculate the difference between the old and new item lists, optimizing performance by only updating the necessary changes. The updated item list is then dispatched to the adapter, ensuring smooth updates to the RecyclerView.

The ViewHolder class represents each item view within the RecyclerView. It initializes the item view and sets up a click listener to handle item click events. If enabled, the selected item can be stored in a data singleton, providing easy access throughout the application. The ViewHolder's bind function delegates the view binding to the user-defined function during adapter initialization.

This Generic Adapter serves as a versatile and efficient solution for displaying and managing data in a RecyclerView. Its reusability enables it to be used in multiple RecyclerView instances, reducing code duplication and enhancing development productivity.

Watch this tutorial to gain a step-by-step understanding of the Generic Adapter implementation and learn how to integrate it into your Android projects. With this powerful tool at your disposal, you can create dynamic RecyclerViews with ease, enhancing the user experience of your Android applications.