Question

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How to send a JSON object over Request with Android?

As I am new to Android development, I struck up with a problem sending requests to a web service in the form of JSON. Googling, I found the following code for sending requests using parameters. Here is the Java class we are sending parameters in the form of:

Main.java

RestClient client = new RestClient(LOGIN_URL);
client.AddParam("Email", _username);
client.AddParam("Passwd", _password);

try {
  client.Execute(RequestMethod.POST);
} catch (Exception e) {
  e.printStackTrace();
}
String response = client.getResponse();

But here I want to send parameters in the form of JSON, like for example I want to send parameters in this form:

{
  "login":{
    "Email":_username,
    "Passwd":_password,
  }
}

So, can anyone help me? How can I send parameters in the form of JSON?

Answer 1

The example you are posting uses a ‘library’ put together by someone as a wrapper around Apache’s HttpClient class. It’s not a particularly good one. But you don’t need to use that wrapper at all, the HttpClient itself is dead simple to utilize. Here’s a code sample you can build on:

final String uri = "http://www.example.com";
final String body = String.format("{\"login\": {\"Email\": \"%s\", \"Passwd\": \"%s\"}", "[e-mail]", "password");

final HttpClient client = new DefaultHttpClient();
final HttpPost postMethod = new HttpPost(uri);
postMethod.setEntity(new StringEntity(body, "utf-8"));

try {
    final HttpResponse response = client.execute(postMethod);
    final String responseData = EntityUtils.toString(response.getEntity(), "utf-8");
} catch(final Exception e) {
    // handle exception here
}

Note that you would most likely be using a JSON library to serialize a POJO and create the request JSON.