![]() We are talking 2 concepts: Reactive and Imperative. Anything is reactive, your mission is satisfy users by handle anything for them without let app crash or go wrong. Android is like a looper, it runs infinitely until user close app. It's not like pure Java, where you have a main function to run lines of code one by one until the end. ![]() So, basically, when you are an Android developer, you are forced to think in Reactive way. Broadcast Receive fires, Service notify to Activity, and many things else come from Framework, our code have to ready for all of them. Go to a screen, fetch data from database, our code already there to handle each of data return from the query. Then I obtain the service: MyService service retrofit.create(MyService.class) Note that I do not write the code of this service, as retrofit works it generate the service automatically using my interface (MyService) annotations. User click a button, our code catch the event, do an action to react to that event. It generate the service for my interface and use Gson to parse the response wrapping it with RxJava Observable. Android Unit Test with Retrofit and Mockito. Unit testing android application with retrofit and rxjava. Yay! our code know it, get response data, parse data, process data, update to UI. enqueue() it makes execution synchron, thus the tests can ran properly without the need of importing 3 different libraries and adding any code or modify the build variants. Rx is "reactive", reactive programming style is like sitting among different things and react to the changing of data. So, that's the reason why RxJava show up and save developer life.įirst of all, you guys may curious about what does "Rx" in RxJava means and why people name it like that. And even debug now is a challenge, because you know, breakpoint would stop a thread while the others still running and It's easy drive them crazy. ![]() And you know, Multithread along with share data between thread is the things that make Android developer life become harder, most of crashes happen here, unexpected result comes out with no good explaination. Ussually, Many APIs get called at same time, some of them get errors, some of them success, the Callback tend to heavy and our Activity just looks like a mess. I still remember the days before RxJava, we jump to background through AsyncTask do to a network call while UI keeps the callback to get ready for any network response. instead of focus on app business, developers waste so many time on repeatly things to adapt with Android framework. I do believe that whole of Android developers have to deal too much with stuffs like callback, switch thread, handle error, cancel process. RxJava came and changed how we code because of its great benefits. Make sure to require Internet permissions in your AndroidManifest.xml file: Īdd the following to your app/build.RxJava isn't something new in Android. ![]() Where should I call startActivity() method here is my wrong trying. Once the data is downloaded then it is parsed into a Plain Old Java Object (POJO) which must be defined for each "resource" in the response. I want to start new activity after call and finish 7 difference requests in parallel using retrofit. ![]() This library makes downloading JSON or XML data from a web API fairly straightforward. See this guide to understand how OkHttp works. The library provides a powerful framework for authenticating and interacting with APIs and sending network requests with OkHttp. Retrofit is a type-safe REST client for Android, Java and Kotlin developed by Square. ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |