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Editorial Team
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Asked: 2026-06-06T12:33:00+00:00

I have Android client app that communicates with server using Socket . On my

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I have Android client app that communicates with server using Socket.

On my development machine, SocketServer (server is also written in Java) is listening at 127.0.1.1 at port 8666. I also have added Internet access permissions in App manifest of Android app.

But when I attempt to instantiate Socket object using client = new Socket("127.0.1.1",8666), it throws IOException with connection refused message (also tried using localhost instead of manually giving IP address, but it doesn’t work as well). While I can easily connect to server from simple console Java program.

What could be wrong here?

Update

My question in some ways relates to this. I AM attempting to access a server running in the machine same in which emulator is running.

Note: I know its not recommended to perform network IOs in any Activity class, and I’m not doing that way either, above code is just a problem simplified to understand.

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1 Answer

  1. Editorial Team

    Try using, Port Forwarding

    From command prompt at adb location,

    adb forward tcp:8666 tcp:8666

    The forward command to set up arbitrary port forwarding — forwarding of requests on a specific host port to a different port on an emulator/device instance. Here’s how you would set up forwarding of host port 8666 to emulator/device port 8666:

    If this doesn’t help then post your code and logcat errors.

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