Retrofit turns your HTTP API into a Java interface public interface "customers/, new Response. of Java with Kotlin, means the code examples shown are no longer applicable. I'll just paste some code here so you get a feel for what I'm talking about. We will be using the popular Retrofit2 library to handle the networking. Documentation is great and the community is huge. The entire network call + JSON/XML parsing is completely handled by it (with help from Gson for JSON parsing), along with support for arbitrary formats with pluggable serialization/deserialization. It essentially lets you treat API calls as simple Java method calls, so you only define which URLs to hit and the types of the request/response parameters as Java classes. In particular, I would recommend not selecting based on how many boxes these libraries check off on a list of arbitrary features instead, focus on what you really need and choose the one that provides the most robust support for those. Naturally, when we have 2 equally good-looking choices we want to make the right decision - based on actual use-cases and anticipated growth of our apps in the future. But you won't see the broken-image icon yet, even if you turn off your networkyou fix that in the last task of the codelab. Use neither if you're downloading large files or streaming for that, use DownloadManager instead.Īs Android developers, we have 2 great networking libraries available to us: Square's Retrofit and Google's Volley. Depending on the speed of your network connection, you might briefly see the loading image as Coil downloads and displays the property image. Use Volley if you have unusual/fine-grained requirements, or if you anticipate needing a lot of flexibility from your networking layer in the future at the cost of more code. Use Retrofit if your use-case is a standard REST API with JSON responses and not too many custom requirements in terms of caching, request prioritization, retries, etc. Above retrofit using default OkHttpClient which is not using cache so we have to. Retrofit 2 and Volley are both great networking libraries for modern Android apps, but each has its own strengths that are worth weighing for critical projects. In caching, it will hit to server periodically means if same network.
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