Question

I am currently developing socket communication between android and server, which is a simple java program run in terminal. Things are going well except there is a warning always appears in the logCat when I close the application:

IInputConnectionWrapper    showStatusIcon on inactive InputConnection

I am searching on the internet to find out the problem I found a post in StackOverflow Similar Problem. The difference is that I can send and receive information well in my program. The answer to this similar problem is that connection is not closed. Does that mean I didn’t call socket.close(); after operation? That leads to a more complicated problem of implementation.

First of all, I want a single, static socket to listen and send to a server. Because I might not close the socket every time I transmit something, so I just close it after the listener finishes the work.

Detail codes are posted below

I initialize connection in the constructor as:

client = new Socket(mServerName, mport);
out = new DataOutputStream(client.getOutputStream()); 
inFromServer = new InputStreamReader(client.getInputStream());
reader = new BufferedReader(inFromServer);

And let them be there during the whole process.

I wrote transmitting from android to server into a function as following:

public void sendRequest(int type, int what1, int what2, Object data)
{
    try{
        if(client.isConnected())
        {
            out.writeUTF(encoded(type,what1,what2,data) + "\n");            
        }
    }catch(IOException e){
        Log.e(TAG, "IOException at SendRequest");
        e.printStackTrace();
    }
}

Listener in a new thread:

try {       
        String line = null;
        while ((line = reader.readLine()) != null)
        {
            ReceiveHandler(line);
        }
    } catch (IOException e) {
        Log.e(TAG, "IOException at StartListen");
        e.printStackTrace();
    }finally{
        try { 
         // The Only Place that I close the Socket
            inFromServer.close();
            out.close();
            reader.close();
            client.close();
        } catch (IOException e) {
            Log.e(TAG, "Close Socket with IOException " + e.toString());
            e.printStackTrace();
        } 
    }

My Question is:

Is there something wrong with my implementation or are there better ways to do this?

Thanks so much for your help!

Answer 1

There is a tool that can help you diagnose network related issues both on Android devices and in the emulator. It may help you to track down the issue a bit further. The ARO tool is open source and available here http://developer.att.com/developer/forward.jsp?passedItemId=9700312