Use rxjava with retrofit enqueue9/12/2023 ![]() ![]() This combination seems to have become a must-have component for Android. ![]() There are a large number of articles titled RxJava+Retrofit+xxx on the major Android forums, and such articles are also receiving much attention. RxJava is a reactive programming framework that makes it easy to model real-world. Because observerOn() and subscribeOn() are also the operators, So when you use it, RxJava will. I chose RxJava and Retrofit as my main tools to solve this issue. ![]() I think it will be easier to understand by looking at the code than by hearing the explanation. I hope you will see that mechanism and know how to switch thread. It would be helpful if you could tell me exactly how to use Coroutine to avoid callback hell in Retrofit. Calling enqueue tells Retrofit to make that call on a background thread and return the result to the callback that were creating here. To make this point clear assume that we need to send user. I tried to add callback to generatePrivateToken() as well but it did not work. It can be said that RxJava+Retrofit is the most popular combination in the entire Android development circle of 2016. Often people tell me to use RxJava or Coroutine, but I want to use Coroutine. What is Retrofit Simply if you need to send or receive data from server you need to serialize data to be able to retrieve it. The problem is it is not waiting for it to finish so the client is null. A retry behavior can be easily implemented by creating a respective higher-order function.I am making multiple Retrofit requests and with every request I need to generate new client with new token. To perform network requests in parallel, use the async() coroutine builder, which is a bit nuanced in terms of error handling ( more information). In order to make an additional request, just a simple call to the Retrofit suspend function needs to be made. You donât even have to figure out how lifecycle handling works, but simple trust that viewModelScope() is doing it correctly. ![]() The Call.enqueue() function starts an HTTP request and takes a callback as an argument. All the other code is really easy to understand, even without Coroutine knowledge because it is ordinary, sequential code that contains only conventional constructs like try-catch. The Retrofit callback API can help achieve this. GetAndroidVersionsCall!!.enqueue(object : Callback> Coroutine builder. GetAndroidVersionsCall = mockApi.getRecentAndroidVersions() Private var getAndroidFeaturesCall: Call? = null Private var getAndroidVersionsCall: Call>? = null Now, letâs create a factory class to instantiate. Retrofit is a sort of safe REST Android client created by Square. Here we have a request, which when executed will give us a result through Retrofitâs Callback interface which we can enqueue to the request. Private val mockApi: CallbackMockApi = mockApi() Retrofit Model to make it work with RxJava. Class SequentialNetworkRequestsCallbacksViewModel( ![]()
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