How to call a RESTful web service from Android?

Question

I have written a REST web service in Netbean IDE using Jersey Framework and Java.

For every request the user needs to provide a username and a password, I know that

Answer 1

I used OkHttpClient to call restful web service. It's very simple.

OkHttpClient httpClient = new OkHttpClient();
Request request = new Request.Builder()
                .url(url)
                .build();

Response response = httpClient.newCall(request).execute();
String body = response.body().string()

Answer 2

Here is my Library That I have created for simple Webservice Calling,

You can use this by adding a one line gradle dependency -

compile 'com.scantity.ScHttpLibrary:ScHttpLibrary:1.0.0'

Here is the demonstration of using.

https://github.com/vishalchhodwani1992/httpLibrary

Answer 3

Using Spring for Android with RestTemplate https://spring.io/guides/gs/consuming-rest-android/

// The connection URL 
String url = "https://ajax.googleapis.com/ajax/" + 
    "services/search/web?v=1.0&q={query}";

// Create a new RestTemplate instance
RestTemplate restTemplate = new RestTemplate();

// Add the String message converter
restTemplate.getMessageConverters().add(new StringHttpMessageConverter());

// Make the HTTP GET request, marshaling the response to a String
String result = restTemplate.getForObject(url, String.class, "Android");