Connecting to localhost web server from android application

by Goran Siric on Monday, December 12, 2011 12:24 PM

To allow your application to connect to the internet first you need to do is to modify AndroidManifest.xml file to request INTERNET permission for your application.

To do this open AndroidManifest.xml file and add following line if not exists:

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


To connect to your local web server (localhost), you must use IP address of  your computer instead of localhost keyword or 127.0.0.1 IP address. That's it because 127.0.0.1 IP address is internally used by android emulator or your android device. 

Somewhere I found that you can use 10.0.0.2 IP adress to connect to  your local web server. I tried it but this not work for me. I think that this depends of type of web server you have installed.

If you want to know more about connecting to the Internet from Android application you can read my blog entry: Android application and the Internet




Author
Goran Siric

Blog about programming

6 comment(s) so far...

Anonymous 2/20/2012

Great information you got here. I've been reading about this topic for one week now for my papers in school and thank God I found it here in your blog. I had a great time reading this.

 
Anonymous 7/8/2012

I can't connect to your entry Android application and the Internet

 
Anonymous 7/8/2012

I saw your entry& thanks for ur info

 
Anonymous 11/26/2012

The correct IP address to use to talk to the host running the emulator is 10.0.2.2. I've abstracted communication with a webserver in my app behind this little nugget:<br /><br />public static boolean isEmulator() <br />{<br /> if (isDebug == null)<br /> {<br /> isDebug = "google_sdk".equals(Build.PRODUCT) || <br /> "sdk".equals(Build.PRODUCT);<br /> }<br /> return isDebug;<br />}<br /> <br />public static String getServerUrl()<br />{<br /> return (isEmulator() ? Constants.SERVER_URL_TEST : Constants.SERVER_URL_PUBLIC);<br />}<br />

 
Anonymous 2/25/2016

plz...help me

 
Anonymous 2/25/2016

we are created one android app<br />this application should display marks of attendace stored in website,<br />so how to retrieve marks from my app<br />plz.. help me



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Copyright 2011 by Goran Siric