How to find whether client socket is connected to server or not

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i written code to find client socket is connected or not.
if(socket.isConnected())
{
//if disconnected also it returing true;
}
else
{
}
But client disconnected also it returing true;Please tell me How to find whether client socket is connected to server or not.

Posted 17-Sep-13 23:15pm

kalaivanan from Bangalore, India

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pasztorpisti 18-Sep-13 6:22am

In a correctly written networking application you never need this check. An existing socket should always be connected and closed/deleted in case of both graceful/ungraceful termination of the communication. What kind of problem do you want to solve with isConnected(). I'm afraid you are trying to solve a problem with a wrong approach.

kalaivanan from Bangalore, India 18-Sep-13 6:37am

if server socket is terminated connection incorrectly,isConnected() returing true.

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Fredrik Bornander · Answer 1 · 2013-09-18T00:11:00

Solution 1

Android's Socket.isConnected() will return true instead of false if the Socket was disconnected incorrectly (i.e. not calling Socket.close).

I think the only guaranteed way of knowing if a Socket is still alive is to try to write to it and handle the IOException that it will throw if it is not connected.

Hope this helps,
Fredrik