How to fetching content from an URL and parse json

Question

I have 2 TextViews in my layout with id's (matricula, nome) and i need get this values from this json request.

I have difficults in both make json request as in get values, here is an example how would i do in php and jquery:

PHP

$alunos = json_decode("let's pretend json data is here");

echo "Matricula: " . $alunos['Aluno']['matricula'];
echo "Nome: " . $alunos['Aluno']['nome'];

Jquery

var alunos = $.parseJSON("let's pretend json data is here");

console.log("Matricula: " + alunos.aluno.matricula);
console.log("Nome: " + alunos.aluno.nome);

To help:
Aluno = Student
Matricula = Student id
Nome = name

I read some answers here about parsing json but i admit it, its hard to understand.

Answer 1

It is also easy in Java (I left out all error handling to focus on the main flow, please add that yourself):

import org.json.JSONObject;
import java.net.URL;
import java.net.HttpURLConnection;
import java.io.InputStream;
import java.io.InputStreamReader;

...

private String readString(Reader r) throws IOException {
    char[] buffer = new char[4096];
    StringBuilder sb = new StringBuilder(1024);
    int len;
    while ((len = r.read(buffer)) > 0) {
        sb.append(buffer, 0, len);
    }
    return sb.toString();
}

...

// fetch the content from the URL
URL url = new URL("http://..."); // add URL here
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
InputStreamReader in = new InputStreamReader(conn.getInputStream(), "UTF-8");
String jsonString = readString(in);
in.close();
conn.disconnect();

// parse it and extract values
JSONObject student = new JSONObject(jsonString);
String id = student.getJSONObject("Aluno").getString("matricula");
String name = student.getJSONObject("Aluno").getString("nome");

For details please see the documentation.