UnknownHostException at the android emulator

Question

I've got an UnknownHostException in my android application when I want to get to my web service.

I inserted an <uses-permission android:name="android.permission.INTERNET" /> at my AndroidManifest.xml.

If I go to my link of webservice via browser it's going fine.

I typed the domain name and IP at the C:\Windows\System32\drivers\etc\hosts file.

But if I run application via emulator I got an UnknownHostException. As I understand, emulator should use my system files to connect with the server...But, practically it doesn't..Help please with this issue.

have you tired 10.0.2.2 as host? – sschrass Jul 24 '12 at 12:54 — sschrass, Jul 24 '12 at 12:54

score 5 · Answer 1 · answered Sep 30 '16 at 18:51

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In my case, I encountered this problem when I had started the emulator while I was logged on to a VPN. Logging off the VPN had no effect until I quit the emulator and restarted. It is easy to test if your emulator is not resolving names correctly - just go to the emulator browser and type in a website hostname (anything but Google's).

answered Sep 30 '16 at 18:51

saswanb

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When this happens to me I have to exit the emulator and relaunch it – Someone Somewhere Oct 11 '18 at 20:47
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Restarting Android from within the emulator doesn't seem to do it. I had to select "Cold Boot Now" from the device manager in Android Studio. Otherwise it was spot on, my VPN somehow disabled the emulator's Internet access. – Christian Davén Jan 24 '23 at 10:14

score 1 · Accepted Answer · edited May 23 '17 at 12:02

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Problem solved using such domains as

CustomHttpClient.executeHttpPost("http//192.168.1.2/path");

Everything works fine with it. I can't edit hosts file in android file system even with root rights. So if you have similar problem - good solution is to use IP addresses, not domains.

Thanks to Haresh Chaudhary

edited May 23 '17 at 12:02

Community

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answered Aug 14 '12 at 08:13

Rikki Tikki Tavi

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If you are using a virtual host, a domain name is required so an IP won't work... – Alexis Wilke Aug 03 '17 at 09:08

score 0 · Answer 3 · answered Jul 24 '12 at 13:01

0

A very nice tutorial for connecting with the webservice is here

You will come through this line in this tutorial..

CustomHttpClient.executeHttpPost("http//192.168.1.2/path");

here path means path of your file placed in htdocs.

answered Jul 24 '12 at 13:01

Haresh Chaudhary

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UnknownHostException at the android emulator

3 Answers3