Скачать или смотреть Fixing the RecyclerView Item Visibility Bug in Android

Learn how to solve the `RecyclerView` item visibility bug in Android, ensuring your comment sections behave correctly when showing or hiding replies.
---
This video is based on the question https://stackoverflow.com/q/66879242/ asked by the user 'igzafer' ( https://stackoverflow.com/u/15489745/ ) and on the answer https://stackoverflow.com/a/66880603/ provided by the user 'Uuu Uuu' ( https://stackoverflow.com/u/6429241/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Recycler Adapter item bug

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Fixing the RecyclerView Item Visibility Bug in Android: A Step-by-Step Guide

If you're developing an Android application that features comments, much like Instagram, you might have run into an annoying issue. Specifically, when users click the "show replies" button, the replies from multiple comments begin to overlap each other and become visible when they shouldn’t. Don't worry—this is a common bug that you can resolve with some strategic adjustments to your RecyclerView logic.

In this post, we'll walk through the steps to effectively handle the visibility of your RecyclerView items to ensure that each comment's replies are displayed correctly without interfering with others.

Understanding the Problem

The situation you're facing is simple but can become complicated due to improper state management. Here's what typically happens:

Each comment line has its own RecyclerView that displays the replies.

When a user clicks "show replies," you want only that specific RecyclerView to be visible.

After about 10-11 items, you notice that the RecyclerView of other comments also shows up inappropriately.

The Solution

Step 1: Create a Visibility Tracker

To manage the visibility of each comment's RecyclerView, we need a way to keep track of whether it's currently visible or hidden. This can be done using a boolean variable within your model class. Here's how:

Modify Your Comment Model:

Add a boolean attribute to your comment model to track whether the reply section should be shown.

[[See Video to Reveal this Text or Code Snippet]]

Initialize the boolean:

Ensure that this variable is false by default for each comment in your model.

Step 2: Update the Adapter Logic

With the visibility tracker in place, you can now modify your RecyclerView adapter to leverage this boolean value. Update your onBindViewHolder method as follows:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Adjust Click Listener

When the "show replies" button is clicked, you need to toggle the visibility state and refresh the specific item in the RecyclerView to reflect this change.

Here’s the updated click logic:

[[See Video to Reveal this Text or Code Snippet]]

Summary of Changes

Visibility Tracking: Add a boolean to track RecyclerView visibility within your model.

Dynamic Updates: Implement logic that checks this boolean when binding views and toggles visibility on click.

Notify Adapter: Use notifyItemChanged to refresh the specific item when its visibility changes.

Conclusion

By creating a state tracker for the visibility of each RecyclerView, you're able to maintain clearer control over which replies are displayed at any given time. This simple modification can help improve the functionality of your comment sections significantly, enhancing user experience.

If you follow these steps, your problem with overlapping RecyclerView items should be resolved, and your comment section will function more smoothly!

Feel free to share your experiences or questions in the comments below. Happy coding!