title: How to access localhost from android emulator?
body: <p>I am studying Xamarin from this tutorial - <a href="https://www.youtube.com/watch?v=t0v4srA4NhA&amp;index=1&amp;list=PLpbcUe4chE78YvgIMtmgNEmRGyGJcsQdF" rel="nofollow noreferrer">Signup user to ASP.NET Identity from Xamarin Forms</a>. Everything is working if a send request with postman. But if I want to use android emulator it is not working. And I cannot use UWP, because developer mode has to be enabled and I don’t have admin rights on my company computer. I enabled developer mode on my private computer and it is working on UWP but it is not working on android emulator. In the tutorial is used UWP and the guy said that for the android emulator is needed some configuration, but he did not tell any details.</p>
  
  <p>I read many articles and it seems that problem is in the connection between my backend (running on localhost) and android emulator. Is it correct that android emulator is a separate machine trying to call my localhost? I tried to change localhost to 127.0.0.1 or 10.0.2.2 and I tried all options from <a href="https://developer.android.com/studio/run/emulator-networking" rel="nofollow noreferrer">this article</a>. But it is not working.</p>
  
  <p>Am I right that localhost has to be changed? If so, where? Or is problem somewhere else?</p>
  
  <p>Api services Register method:</p>
  
  <pre><code>    public async Task&lt;bool&gt; RegisterAsync(string email, string password, string confirmPassword)
      {
  
          try
          {
              System.Diagnostics.Debug.WriteLine("Email: " + email);
              var client = new HttpClient();
  
              var model = new RegisterBindingModel
              {
                  Email = email,
                  Password = password,
                  ConfirmPassword = confirmPassword
              };
              var json = JsonConvert.SerializeObject(model);
  
              HttpContent content = new StringContent(json);
              content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
              var response = await client.PostAsync("http://localhost:49205/api/Account/Register", content); 
  
              if (response.IsSuccessStatusCode)
              {
                  return true;
              }
  
              return false;
          }
          catch(Exception e)
          {
              System.Diagnostics.Debug.WriteLine("Error: " + e);
              throw;
          }
     }
  </code></pre>
  
  <p>Exception if I use localhost:</p>
  
  <pre><code>{System.Net.Http.HttpRequestException: An error occurred while sending the request ---&gt; System.Net.WebException: Error: ConnectFailure (Connection refused) ---&gt; System.Net.Sockets.SocketException: Connection refused
  at System.Net.Sockets.Socket.Connect (System.Net.EndPoint remoteEP) [0x000b6] in &lt;bcdc1df2b3724ab69797f3819a126346&gt;:0 
  at System.Net.WebConnection.Connect (System.Net.HttpWebRequest request) [0x0016d] in &lt;bcdc1df2b3724ab69797f3819a126346&gt;:0 --- End of inner exception stack trace ---
  at System.Net.HttpWebRequest.EndGetRequestStream (System.IAsyncResult asyncResult) [0x0003a] in &lt;bcdc1df2b3724ab69797f3819a126346&gt;:0 
  at System.Threading.Tasks.TaskFactory`1[TResult].FromAsyncCoreLogic (System.IAsyncResult iar, System.Func`2[T,TResult] endFunction, System.Action`1[T] endAction, System.Threading.Tasks.Task`1[TResult] promise, System.Boolean requiresSynchronization) [0x0000f] in &lt;fcbf47a04b2e4d90beafbae627e1fca4&gt;:0 
  </code></pre>
  
  <p>Bad request if I use 10.0.2.2: </p>
  
  <pre><code>{StatusCode: 400, ReasonPhrase: 'Bad Request', Version: 1.1, Content: System.Net.Http.StreamContent, 
  
  Headers: {Server: Microsoft-HTTPAPI/2.0 Date: Thu, 17 May 2018 09:08:41 GMT Connection: close Content-Type: text/html; charset=us-ascii Content-Length: 334 }}
  </code></pre>