error connection refused

Question

I want to make an Http Connection to my own servlet. Here is my code:

try
{
    HttpClient client = new DefaultHttpClient();
    HttpPost httpMethod = new HttpPost("http://localhost:8080/getHeader/HeaderServlet");
    httppost.setHeader("Content-Type", "application/x-www-form-urlencoded"); 
    ResponseHandler<String> responseHandler = new BasicResponseHandler();
    String response = client.execute(httppost, responseHandler);
    String result = response.toString();
}

But i'm unable to, and I get the error:

org.apache.http.conn.HttpHostConnectionException:Connection to http://localhost:8080 refused

I will be thankful your help

If you're still facing the issue, feel free to give this [one](https://stackoverflow.com/a/67032554/12298875) a try — Omar Khaium Chowdhury, Apr 10 '21 at 09:04

score 145 · Answer 1 · edited Dec 28 '18 at 07:02

145

Use `10.0.2.2` instead of `localhost`.

If you are referring to a localhost from your device than use the http://10.0.2.2/ instead of the http://127.0.0.1/ or http://localhost/.

Because your Android emulator is running on a Virtual Machine(QEMU) and you can not connect to a server directly running on your PC.

So your code snippet will be like this:

HttpPost httpMethod = new HttpPost("http://10.0.2.2:8080/getHeader/HeaderServlet");

Refer this : Emulator Networking for more information.

edited Dec 28 '18 at 07:02

Karan Harsh Wardhan

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answered Feb 05 '11 at 05:50

Vikas Patidar

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1

@Vikas I tried using `10.0.2.2`, but does not work for me. I have `INTERNET` permission added in manifest file. – Geek Jun 27 '13 at 09:32
For those who are looking for more suggestions to avoid `Connection refused`: http://stackoverflow.com/questions/20015883/connecting-localhost-via-android-connection-to-10-0-2-2-refused/22313837#22313837 – Junior Mayhé Mar 11 '14 at 00:01

score 23 · Answer 2 · edited Jul 02 '18 at 09:47

23

I had the same problem but I solved it by putting in the following label said

<uses-permission android:name="android.permission.INTERNET" />

which allowed me to connect to the Internet.

edited Jul 02 '18 at 09:47

Mansuro

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answered Oct 25 '11 at 18:26

Jesús Antonio Cabarcas

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score 8 · Answer 3 · edited Nov 16 '16 at 10:26

8

The better is that you put your PC LAN's IP , for example , in windows , run "ipconfig" in a cmd console , suppose that your IP is : 192.168.1.34 , then

HttpPost httpMethod = 
   new HttpPost("http://192.168.1.34:8080/getHeader/HeaderServlet");

edited Nov 16 '16 at 10:26

Amir

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answered May 26 '14 at 17:00

Saif Ksibi

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10.0.0.2 did not work for me, looking up my IP and using that solved this problem for me. – DJ_Polly Jul 17 '14 at 00:42
@DJ_Polly, The IP is 10.0.2.2. Did you try that? – Nick H Aug 12 '15 at 16:48

score 3 · Answer 4 · answered Feb 05 '11 at 05:35

3

localhost would be the Android device itself. I assume that this is not where your servlet is. You'll need to enter the hostname or IP of wherever your servlet is.

(If it's really on your device (why?!), then you need to make sure you have the INTERNET permission. You could try connecting to it from the built-in browser.)

answered Feb 05 '11 at 05:35

EboMike

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the servlet is on my own Pc and yes i had already set the internet Permissions in Android Manifest – Rozy Feb 05 '11 at 05:44
Well, your own PC is not your Android device, even if you're using an emulator. – EboMike Feb 05 '11 at 05:47

score 0 · Answer 5 · answered Apr 08 '17 at 07:16

0

For me problem solved by deleting proxyHost,proxyPort, etc from gradle.properties

answered Apr 08 '17 at 07:16

farhad.kargaran

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error connection refused

5 Answers5

Use `10.0.2.2` instead of `localhost`.

Linked

error connection refused

5 Answers5

Use 10.0.2.2 instead of localhost.

Linked

Use `10.0.2.2` instead of `localhost`.