Why Your Constraint Layout Isn't Scrolling in NestedScrollView and How to Fix It

Описание: Learn how to resolve scrolling issues with Constraint Layout inside NestedScrollView in Android. Follow our easy-to-understand solution for a seamless UI experience.
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This video is based on the question https://stackoverflow.com/q/66596405/ asked by the user 'Sparsh Dutta' ( https://stackoverflow.com/u/9260623/ ) and on the answer https://stackoverflow.com/a/66597831/ provided by the user 'Sparsh Dutta' ( https://stackoverflow.com/u/9260623/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Why Your Constraint Layout Isn't Scrolling in NestedScrollView

Are you facing issues with your Constraint Layout not scrolling when placed inside a NestedScrollView? You’ve come to the right place. This problem can be frustrating, especially when you’ve checked everything and it still doesn’t seem to work. In this guide, we will go through a common issue faced by Android developers and how to effectively solve it.

The Problem

You might have designed a layout and nested Constraint Layout within a NestedScrollView to achieve a scrollable screen. However, the expected scroll behavior doesn’t happen. Many developers have encountered this issue, questioning why their layout doesn't scroll despite everything seeming correct.

Example Layout

Let’s analyze the XML structure you're working with:

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

When the pandemic of scrolling issues hits, many developers often look for missing elements in their XML file, pointing fingers at attributes, or dismissing it altogether.

The Solution

The good news is that this problem can be solved easily. Let's break down the steps you can take to fix this scrolling issue.

Step 1: Remove fillViewport Property

The first step is to remove the android:fillViewport property from your NestedScrollView. This property can sometimes conflict with the scrolling behavior of your layout, preventing it from scrolling as expected.

Step 2: Add an Empty View at the End

After that, it is beneficial to ensure there is enough space at the bottom for scrolling. You can do this by adding an empty View at the end of your Constraint Layout. This sliver of space gives your layout the extra height needed for scrolling.

Here’s how you can do it:

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

Why This Works

Adding an empty view allows the NestedScrollView to calculate the content height properly, facilitating smooth scrolling. The removal of the fillViewport makes sure the rendering of your views is not constrained—thus resolving the scrolling issue.

Conclusion

To recap, if your Constraint Layout isn’t scrolling in a NestedScrollView, consider removing the fillViewport attribute and adding a small empty view at the end. This simple adjustment can help solve your scrolling woes and optimize your user interface.

Now you can focus on what really matters—enhancing your app’s functionality and user experience without being bogged down by layout issues. Happy coding!