title: Can't connect mobile device to local MySQL database, but works using emulator
body: <p>I can't connect my mobile device to my local MySQL database. I'm using Wamp server 64 bits. However it perfectly works on the emulator device.
  I just followed this tutorial : <a href="https://www.youtube.com/watch?v=4e8be8xseqE" rel="nofollow noreferrer">https://www.youtube.com/watch?v=4e8be8xseqE</a>.</p>
  
  <p>When I run the app on the emulator, the adress 10.0.2.2 works.
  When I run the app on my own device, I change the adress to 127.0.0.1 or my IPv4.
  I even tried to connect my mobile to my computer wifi's hotspot, and use the specific IPv4 but that didn't work.</p>
  
  <p>Also I installed Android Terminal Emulator and pinged my compter's IP but that didn't work... That's really strange because my mobile is well connected to the same wifi network than my computer.</p>
  
  <p>Android code to connect to the local MySQL database :</p>
  
  <pre><code>@Override
      protected String doInBackground(String... params) {
          String type = params[0];
          String login_url = "http://192.168.1.34/login.php";
              if(type.equals("login")) {
              try {
                  String username = params[1];
                  String password = params[2];
                  URL url = new URL(login_url);
                  HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
                  httpURLConnection.setRequestMethod("POST");
                  httpURLConnection.setDoOutput(true);
                  httpURLConnection.setDoInput(true);
                  OutputStream outputStream = httpURLConnection.getOutputStream();
                  BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
  
                  String post_data = URLEncoder.encode("username", "UTF-8") + "=" +
                          URLEncoder.encode(username, "UTF-8") + "&amp;" + URLEncoder.encode("password", "UTF-8") + "=" +
                          URLEncoder.encode(password, "UTF-8");
  
                  bufferedWriter.write(post_data);
                  bufferedWriter.flush();
                  bufferedWriter.close();
                  outputStream.close();
  
                  InputStream inputStream = httpURLConnection.getInputStream();
                  BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "ISO-8859-1"));
  
                  String result = "";
                  String line;
  
                  while((line = bufferedReader.readLine()) != null) {
                      result += line;
                  }
  
                  bufferedReader.close();
                  inputStream.close();
                  httpURLConnection.disconnect();
  
                  return result;
  
              } catch (MalformedURLException e) {
                  e.printStackTrace();
              } catch (IOException e) {
                  e.printStackTrace();
              }
          }
  
          return null;
      }
  </code></pre>
  
  <p>PHP scripts :
  connect.php</p>
  
  <pre><code>&lt;?php
  
  $db_name = "employee101";
  $mysql_username = "root";
  $mysql_password = "";
  $server_name = "localhost";
  $conn = mysqli_connect($server_name, $mysql_username, $mysql_password, $db_name);
  
  ?&gt;
  </code></pre>
  
  <p>login.php</p>
  
  <pre><code>&lt;?php
  
  require "conn.php";
  
  $user_name = $_POST["username"];
  $user_name = $_POST["password"];
  $user_pass = "123";
  $mysql_qry = "select * from employee_data where username like '$user_name' and password like '$user_pass';";
  
  $result = mysqli_query($conn, $mysql_qry);
  
  if(mysqli_num_rows($result) &gt; 0)
  {
      echo "login success";
  }
  else
  {
      echo "login not success";
  }
  
  ?&gt;
  </code></pre>
  
  <p>So, on the emulator that displays a Toast with the message "login success".
  On my own device, there is no message. I don't know what's wrong.</p>
  
  <p>Do you have any idea ?
  Thanks</p>