Why Did RecyclerView Remove onItemClickListener(), and What's the Best Alternative?

Understanding the Absence of onItemClickListener() in RecyclerView

Main Question: Reasons for Removal

RecyclerView removes the onItemClickListener() method due to its limitations in ListView. ListView's inability to accurately handle click events led to confusion and inconsistent behavior when internal elements had click listeners.

Secondary Question: Alternative Solution

Your approach of implementing onClick() in your RecyclerView.Adapter is the intended approach by Google. This gives you flexibility to handle clicks at the item level, including the ability to delegate them to interfaces or orchestrators.

Furthermore, an elegant solution using RxJava is proposed:

• Add a PublishSubject to expose an Observable for the clicks.
• Bind the click listener to the item view, emitting the clicked element to the subject.
• Consume the click events from the Adapter's exposed Observable.

Original Post: Rationale and Advantages

Google's decision was motivated by the inherent design differences between ListView and RecyclerView. RecyclerView does not assume a row/column layout, allowing for more versatile item arrangement. Instead, it delegates click handling to individual items or custom implementations.

The advantages of this approach include:

• Improved performance: Avoiding unnecessary callbacks improves overall responsiveness.
• Greater flexibility: Developers have complete control over click behavior, allowing for complex interactions.
• Reusability: ViewHolder can be designed to handle multiple click types, facilitating customization without code duplication.

By implementing custom click handling, you unlock the full potential of RecyclerView, enabling efficient and adaptive click management.

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