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Editorial Team
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Asked: 2026-06-05T16:49:58+00:00

I’ve copy/pasted the code from this tutorial about sockets on Android . It builds

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I’ve copy/pasted the code from this tutorial about sockets on Android.

It builds fine and runs as expected, until a connection is attempted.

I’ve got it connected with USB and I’ve used ADB to turn on port forwarding.

I’ve written test apps in C# (which I’m more comfortable with than Java) and I keep getting error 10061:

No connection could be made because the target computer actively refused it. This usually results from trying to connect to a service that is inactive on the foreign host—that is, one with no server application running.

When I use SocketTest, I get the following (rather cryptic) message:

Connection error: connect

I’ve tried disabling my firewall, but this doesn’t help. What could be wrong?

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1 Answer

  1. Editorial Team

    It turns out it was to do with ADB. I had started port forwarding at the beginning of my session, but the ADB process must have restarted at some point because when I reissued the port forward command my app sprang to life.

    Real pity there’s no way of viewing the ports currently being forwarded by ADB. I suppose the bottom line is “if in doubt, do it again”.

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