How to Add a Header to All Retrofit Requests in Android Using Kotlin скачать в хорошем качестве

How to Add a Header to All Retrofit Requests in Android Using Kotlin

Learn how to efficiently add a custom header to all your Retrofit requests in Android with Kotlin. Simplify your API call management! --- This video is based on the question https://stackoverflow.com/q/62625125/ asked by the user 'AmSabba' ( https://stackoverflow.com/u/10948805/ ) and on the answer https://stackoverflow.com/a/62628242/ provided by the user 'Aleksey Kislyakov' ( https://stackoverflow.com/u/12258664/ ) 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: adding a header to all requests in the retrofit factory? 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. --- Adding a Header to All Retrofit Requests in Android When building Android applications that interact with APIs, it’s common to need to include certain pieces of information—like version numbers or authentication tokens—in every request. If you're using Retrofit for making those API calls, you might wonder: how can I add a header to all requests without modifying each individual call? In this post, we’ll explore how to effectively add a header—such as the app version—at the Retrofit factory level. This approach simplifies your code and keeps your API interactions consistent. Understanding the Retrofit Factory Structure In Android development, the Retrofit library is often used to manage API calls. A Retrofit factory serves as a centralized location for constructing your Retrofit instance, including setting up network clients and any necessary interceptors. Here’s a common way you might define a Retrofit factory: [[See Video to Reveal this Text or Code Snippet]] Adding Headers with Interceptors What is an Interceptor? An interceptor allows you to intercept and modify requests and responses sent through your HTTP client. This functionality can be used to add headers as needed. Steps to Add a Header Define Your Logging Interceptor: This is where you will handle logging for your requests. [[See Video to Reveal this Text or Code Snippet]] Create a Header Interceptor: Use a second interceptor to add your custom headers. Here’s how: [[See Video to Reveal this Text or Code Snippet]] Integrate into Your Retrofit Factory: Combine both interceptors into your Retrofit setup. Updated RetrofitFactory Example Here's how your Retrofit factory might look after adding the header interceptor: [[See Video to Reveal this Text or Code Snippet]] Conclusion By utilizing interceptors in your Retrofit factory, you can streamline your API calls and ensure that critical data—like your app version—gets sent with every request. This approach keeps your code clean and allows you to manage headers centrally. Whether you're building a new app or maintaining an existing one, using interceptors is a best practice that can significantly enhance your network layer's flexibility and efficiency. Give this solution a try, and let us know how it simplifies your Retrofit usage! Happy coding!