Answer by einnocent for How can I access my localhost from my Android device?

You may have your web server listening on your loopback interface and not on your network interface. Major signs of this are:

• Hits on 127.0.0.1 and localhost (from localhost or Android emulator) work
• Hits on 192.168.xxx.xxx do not work, whether from localhost, LAN, or WAN

I talk more about diagnosing this and fixing this in an answer here.