![]() ![]() ![]() ![]() In Retrofit you configure which converter is used for the data serialization. call apiService.createuser(user) call.enqueue(new Callback().It makes it relatively easy to retrieve and upload JSON (or other structured data) via a REST based webservice. Retrofit is a type-safe REST client for Android, Java and Kotlin developed by. This library, in my opinion, is the most important one to learn, as it will do the main job. Meaning one of my classes is returning null, I have no idea why this happens because I have checked the whole classes to find where the fault is but to no avail. Retrofit is a REST Client for Java and Android. getJSON() The Asynchronous request is executed by calling enqueue(). internal.os.ZygoteInit.main(ZygoteInit.java: 912) In the loadJSON() method we initialize Retrofit and carry out network operations. internal.os.RuntimeInit$n(RuntimeInit.java: 497)Īt com.android. : Attempt to invoke virtual method ' .Main .Example.getMain()' on a null object referenceĪt $1.onResponse(FirstFragment.java: 107)Īt retrofit2.DefaultCallAdapterFactory$ExecutorCallbackCall$1.lambda$onResponse$0$DefaultCallAdapterFactory$ExecutorCallbackCall$1(DefaultCallAdapterFactory.java: 89)Īt retrofit2.-$$Lambda$DefaultCallAdapterFactory$ExecutorCallbackCall$1$n(Unknown Source: 6)Īt android.os.Handler.handleCallback(Handler.java: 873)Īt android.os.Handler.dispatchMessage(Handler.java: 99)Īt android.os.Looper.loop(Looper.java: 193)Īt (ActivityThread.java: 6819)Īt .invoke(Native Method)Īt com.android. ![]()
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