Android Studio RecyclerView Onclick - The Most Popular Way

When working with RecyclerView, we often encounter issues while trying to get the adapter position and item ID inside our Activity/Fragment/View from a ViewHolder instance. This problem has been faced by many developers, and there are several ways to solve it. In this article, we will explore the most popular way of getting the adapter position and item ID using RecyclerView.

The Most Popular Way

One common approach is to use the `setTag()` method inside your ViewHolder to store the adapter's object, and then retrieve it using the `getAdapterPosition()` method from within your Activity/Fragment/View. This method seems simple and straightforward, but it has its limitations. The issue with this approach is that you need to create a custom interface for your RecyclerView Adapter.

public interface ItemClickListener {

void onItemClick(View view, int position);

}

In this interface, the `onItemClick` method takes a View and an integer representing the adapter's position as parameters. This interface allows you to pass a reference of the current item within the ViewHolder to the Activity/Fragment/View.

However, creating a custom interface for your RecyclerView Adapter has its own set of challenges. For instance, if you have multiple items in your RecyclerView, each with its own unique behavior, you would need to create separate instances of the custom interface for each item. This can lead to complexity and make your code harder to maintain.

TL;DR

Instead of creating a custom ItemClickListener interface to getAdapterPosition() inside your Activity/Fragment/View and end up creating multiple Anonymous Classes under the hood for each item, there is a more efficient way to achieve this.

Update 2: Implementation Example App on GitHub

For those who still have doubts about how to implement this solution, I've included an example implementation on GitHub. It's simple, isn't it? Let me know your views and suggestions about this in the comment section.

Update 1: Lambda Functions as an Alternative

Another alternative approach is to use lambda functions to achieve the same result without creating a custom interface. This method is more concise and easier to read, making it a popular choice among developers.

In conclusion, getting the adapter position and item ID inside your Activity/Fragment/View from a ViewHolder instance can be achieved using several methods. The most popular way involves creating a custom interface for your RecyclerView Adapter, but this approach has its limitations. By exploring alternative solutions like lambda functions, you can write more efficient and maintainable code.

Android studio recyclerview onclick