Скачать или смотреть How to Set SurfaceTextureListener in Android with Kotlin

Learn how to set SurfaceTextureListener in Android using Kotlin effectively, and get your TextureView working seamlessly with camera previews.
---
This video is based on the question https://stackoverflow.com/q/63758328/ asked by the user 'Puspam' ( https://stackoverflow.com/u/11043809/ ) and on the answer https://stackoverflow.com/a/63758594/ provided by the user 'Matias Ficarrotti' ( https://stackoverflow.com/u/5802603/ ) 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 setSurfaceTextureListener in Android with 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 Set SurfaceTextureListener in Android with Kotlin

Are you facing challenges while trying to use TextureView in your Android application to display camera previews? Specifically, are you looking to implement SurfaceTextureListener using the Kotlin programming language? You’re not alone! Many developers transitioning from Java to Kotlin encounter some differences in syntax and style. In this guide, we'll break down how to correctly set a SurfaceTextureListener in Kotlin, allowing you to get your camera previews up and running in no time.

Understanding the Problem

In Java, setting a SurfaceTextureListener for a TextureView is straightforward. You might have been accustomed to using an anonymous class for setting up your listener. Here’s a brief look at how it looks in Java:

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

As you can see, the listener is defined through an anonymous class. However, when it comes to Kotlin, the approach is slightly different.

Solution: Setting SurfaceTextureListener in Kotlin

In Kotlin, you do not use a setter method to assign your listener. Instead, you directly set the surfaceTextureListener property of the TextureView. You can achieve the same functionality as in Java by using the object keyword to define an anonymous class. Let’s look at the correct code implementation for Kotlin:

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

Breaking it Down

Direct Assignment: In Kotlin, you use myTextureView.surfaceTextureListener = ... instead of a setter method.

Anonymous Class: You create an anonymous class for SurfaceTextureListener using the object keyword, which allows you to implement interface methods inline.

Method Overrides: Much like in Java, you will need to override the necessary methods (onSurfaceTextureAvailable, onSurfaceTextureSizeChanged, onSurfaceTextureDestroyed, and onSurfaceTextureUpdated) to handle different states of the TextureView.

Key Takeaways

Transitioning from Java to Kotlin may take a moment to adjust, especially with similar class and listener implementations.

Using object in Kotlin will let you implement interfaces like SurfaceTextureListener without the need for a separate class declaration.

Always ensure you handle each overridden method properly to manage the behavior of your TextureView effectively.

Conclusion

Setting a SurfaceTextureListener in Android with Kotlin can be accomplished easily once you understand the syntax and concepts behind the language. With the code provided, you're now equipped to properly implement your TextureView and have it display camera previews seamlessly. Dive in and start building your application with confidence!