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LG retrofit HVAC solutions offer a quick and easy replacement of your old HVAC system, featuring an optimised inverter system that allows you to save more than 50% of energy per year. The HVAC system replacement doesn"t require additional constructions and uses existing pipes and installation materials. Discover more below.

LG Air Conditioner Retrofit solution can reuse existing installation materials such as power lines, breakers, communication lines, drains, and pipes. This reduces costs and installation times and eliminates the need for intrusive construction.

With LG Inverter technology, you can reduce unnecessary energy use and save on electricity bills. Life Cycle Cost (L.C.C.) analysis helps estimate energy savings and payback you could get when using Retrofit Solution’s Inverter technology.

Retrofit is a type-safe HTTP networking library used for Android and Java. Retrofit was even better since it was super fast, offered better functionality, and even simpler syntax. Most developers since then have switched to using Retrofit to make API requests.

Open Android Studio and Start a new Android Studio Project -> Empty Activity. Let us name the project MarvelRetrofit. Select Finish and wait for the project to build.

implementation "com.squareup.retrofit2:retrofit:2.7.2"implementation "com.squareup.retrofit2:converter-gson:2.7.2"implementation "com.squareup.okhttp3:okhttp:3.6.0"

public class RetrofitClient {private static RetrofitClient instance = null;private Api myApi;private RetrofitClient() {Retrofit retrofit = new Retrofit.Builder().baseUrl(Api.BASE_URL).addConverterFactory(GsonConverterFactory.create()).build();myApi = retrofit.create(Api.class);}public static synchronized RetrofitClient getInstance() {if (instance == null) {instance = new RetrofitClient();}return instance;}public Api getMyApi() {return myApi;}}

public class MainActivity extends AppCompatActivity {ListView superListView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);superListView = findViewById(R.id.superListView);getSuperHeroes();}private void getSuperHeroes() {Call> call = RetrofitClient.getInstance().getMyApi().getsuperHeroes();call.enqueue(new Callback>() {@Overridepublic void onResponse(Call> call, Response> response) {List myheroList = response.body();String[] oneHeroes = new String[myheroList.size()];for (int i = 0; i < myheroList.size(); i++) {oneHeroes[i] = myheroList.get(i).getName();}superListView.setAdapter(new ArrayAdapter(getApplicationContext(), android.R.layout.simple_list_item_1, oneHeroes));}@Overridepublic void onFailure(Call> call, Throwable t) {Toast.makeText(getApplicationContext(), "An error has occured", Toast.LENGTH_LONG).show();}});}}

We have learned that networking is a crucial factor in mobile application development. We have learned how to use Retrofit and its advantages and disadvantages. Did you know that Retrofit takes 312ms to carry out one discussion? That is super fast.

Check out other ways to use Retrofit in their official documentation. You can access this tutorial’s code on GitHub. You can also download the sample APK on Google Drive.

I would like to handle my response from server , but I don"t know how JSON (from server) its looks like. So I tried to display response as String , but I cant do it. Is it possible to display response as String? And then handle the response correctly. thanks

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With its new, advanced workflow, Colordyne’s retrofit technology at Labelexpo Americas is a reliable and effective upgrade in the power and flexibility converters need to meet new market opportunities.

The previous tutorials guided you through various use cases of Retrofit and showed you opportunities to enhance the app with Retrofit’s built-in functionality. This tutorial will show you how to upload a file to a backend server using the second major release of Retrofit, namely Retrofit 2.

This tutorial is intentionally separated from the already published tutorial on how to upload files with Retrofit v1, because the internal changes from Retrofit 1 to Retrofit 2 are profound and you need to understand the way Retrofit 2 handles file uploads.

Before we dive deeper into the file upload topic with Retrofit 2, let’s shortly recap the previously used functionality in v1. Retrofit 1 used a class called TypedFile for file uploads to a server. This class has been removed from Retrofit 2. Further, Retrofit 2 now leverages the OkHttp library for any network operation and, as a result, OkHttp’s classes for use cases like file uploads.

Using Retrofit 2, you need to use either OkHttp’s RequestBody or MultipartBody.Part classes and encapsulate your file into a request body. Let’s have a look at the interface definition for file uploads.

At this point, you’ve defined the necessary service interface for Retrofit. Now you can move on and touch the actual file upload. We’ll use the ServiceGenerator class which generates a service client. We’ve introduced the ServiceGenerator class in the creating a sustainable Android client tutorial earlier in this series.

Please keep an eye on Retrofit’s content type. If you intercept the underlying OkHttp client and change the content type to application/json, your server might have issues with the deserialization process. Make sure you’re not defining the header indicating you’re sending JSON data, but multipart/form-data.

If you already have your backend project, you can lean on the example code below. We use a simple hapi server with a POST route available at /upload. Additionally, we tell hapi to don’t parse the incoming request, because we use a Node.js library called multiparty for the payload parsing.

Below you can see the output of a successful request and payload parsing on server-side. The first null is the err object. Afterwards, you can see the fields which is only the description as part of the request. And last but not least, the file is available within the picture field. Here you see our previously defined names on client side. 20160312_095248.jpg is passed as the original name and the actual field name is picture. For further processing, access the uploaded image at path’s location.

File uploads are an essential feature within up-to-date apps and you can integrate this feature within your app using Retrofit. This tutorial guided you through the necessary steps to upload a file from your Android device to your backend server.

What to expect within the next post on Retrofit? Next week you’ll learn all about how to get back logging within Retrofit 2. Stay tuned, it will be a good shot!

All modern Android apps need to do network requests. Retrofit offers you an extremely convenient way of creating and managing network requests. From asynchronous execution on a background thread, to automatic conversion of server responses to Java objects, Retrofit does almost everything for you. Once you"ve a deep understanding of Retrofit, writing complex requests (e.g., OAuth authentication) will be done in a few minutes.

Invest time to fully understand Retrofit"s principles. It"ll pay off multiple times in the future! Our book offers you a fast and easy way to get a full overview over Retrofit. You"ll learn how to create effective REST clients on Android in every detail.