Скачать или смотреть How to Implement a CircularProgressIndicator in Kotlin for Android Applications

Learn how to seamlessly integrate a `CircularProgressIndicator` into your Kotlin Android app, while improving user experience during data loading.
---
This video is based on the question https://stackoverflow.com/q/66962072/ asked by the user 'mafortis' ( https://stackoverflow.com/u/8490993/ ) and on the answer https://stackoverflow.com/a/66962314/ provided by the user 'mafortis' ( https://stackoverflow.com/u/8490993/ ) 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: How to implement material CircularProgressIndicator in kotlin

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.
---
How to Implement a CircularProgressIndicator in Kotlin for Android Applications

When developing Android applications, it's common for tasks such as data fetching to take a while. To enhance user experience during these moments, implementing a visual indicator, like a CircularProgressIndicator, becomes essential. In this guide, we will dive into the steps required to properly implement this feature in your Kotlin-based Android application and troubleshoot common issues.

The Problem

You might encounter an error message such as root.findViewById(R.id.loadingbar) must not be null while attempting to use CircularProgressIndicator. This usually indicates that the progress indicator is not correctly referenced in your layout XML or not positioned appropriately within your layout.

The Solution

To solve this problem and successfully show a CircularProgressIndicator while your data is loading, follow the steps we will outline below.

Steps to Implement CircularProgressIndicator

Properly Position Your Layout Elements: Ensure that your progress indicator is defined in the layout file where the RecyclerView is also defined. This helps keep the progress indicator accessible when the data is loading.

Hide and Show Elements Appropriately:

Hide RecyclerView Items: Initially, when the data loading begins, hide the RecyclerView elements to avoid confusing users.

Show Circular Progress: Display the CircularProgressIndicator while data is being fetched.

Hide Progress Indicator When Data is Ready: Once the data fetching is complete, hide the progress indicator and display the RecyclerView elements.

Detailed Implementation

XML Layout Configuration

First, make sure you have defined your CircularProgressIndicator in the XML layout of your fragment, exactly as shown below:

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

Kotlin Implementation

Next, incorporate the following modifications into your fragment's Kotlin code:

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

Troubleshooting

If you still encounter issues:

Confirm that the IDs used in the layout files match those referenced in the Kotlin code.

Make sure you're using FragmentOrdersBinding correctly to access views.

Conclusion

Integrating a CircularProgressIndicator into your Kotlin Android application significantly improves user engagement during data fetching. By following the steps outlined in this post, you can avoid common pitfalls and ensure that your users have a smooth experience while your app processes requests.

When moving forward, keep experimenting with Material Design components to enhance your application's UI and UX!