Android Alura iChat - Examples

ChatService.java

//De envio
new Thread(new Runnable() {
  @Override
  public void run() {
    String texto = mensagem.getTexto();
    try {
      URL url = new URL("http://address/polling");
      HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();
      httpConnection.setRequestMethod("POST");
      httpConnection.setRequestProperty("Content-type", "application/json");
      
      JSONStringer json = new JSONStringer()
                            .object()
                            .key("text")
                            .value(texto)
                            .key("id")
                            .value(mensagem.getId())
                            .endObject();
      
      OutputStream saida = httpConnection.getOutputStream();
      PrintStream ps = new PrintStream(saida);
      ps.println(json.toString());
      httpConnection.connect();
      httpConnection.getInputStream();
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }
}).start();

//De recebimento
new Thread(new Runnable() {
            @Override
            public void run() {

                try {
                    URL url = new URL("http://172.21.180.209:8080/polling");
                    HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();
                    httpConnection.setRequestMethod("GET");
                    httpConnection.setRequestProperty("Accept", "application/json");


                    httpConnection.connect();
                    Scanner scanner = new Scanner(httpConnection.getInputStream());
                    StringBuilder builder = new StringBuilder();
                    while (scanner.hasNextLine()){
                        builder.append(scanner.nextLine());
                    }

                    String json = builder.toString();
                    JSONObject jsonObject = new JSONObject(json);
                    final Mensagem mensagem = new Mensagem(jsonObject.getInt("id"),jsonObject.getString("text"));

                    activity.runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            activity.colocaNaList(mensagem);
                        }
                    });


                } catch (Exception e) {
                    throw new RuntimeException(e);
                }

            }
        }).start();