Why is my Web API server refusing to accept calls from Android?

Question

I can access my Web API server from a Windows app without problems. From Android, though, is a different story

Why would that be?

Is "localhost" the wrong thing to use (in the URL)? Should I use the name of the computer instead?

Does the string (passed literally as "http://localhost:28642/api/Departments/GetCount?serialNum=4242") need to be verbatimized?

What is the difference between a Windows app calling a REST method, and an Android app calling the same REST method, that would cause the latter to fail (connection refused)?

Community · Accepted Answer · 2017-05-23 12:01:32Z

5

Referencing "localhost" to refer to your local machine doesn't work on the Android emulator; you need to use a special IP which the emulator will forward on to the host machine. You need to replace localhost with 10.0.2.2, as per this answer.

If you're testing this on a physical device (rather than the emulator) you'll need to use your machines IP on the local network.

edited May 23, 2017 at 12:01

CommunityBot

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answered Apr 2, 2014 at 0:14

Adam S

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