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POJava Android Socket Connection. Wrong ip address causing application to stop responding
 

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  1. POJava Android Socket Connection. Wrong ip address causing application to stop responding
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    <p>I have a socket connection from an android phone to a server and the code works fine when i enter the correct IP address and port number but if they are incorrect the application stops responding and tells me to force quit. I would assume that the <strong>catch(UnknownHostException e)</strong> would catch that but the code stops responding at <strong>socket = new Socket(_ip, _portNum);</strong>. _ip and _port are passed into it by what the user enters into the phone. i need to make it so if someone enters the wrong IP or Port it wont crash but tell them to enter again.</p> <pre><code> public void Connect(String _ip, int _portNum) throws ParserConfigurationException, SAXException, IOException{ //CREATES SOCKET Socket socket = null; DataInputStream input = null; DataOutputStream output = null; //CREATE DATA STREAMS try{ Log.e("trying to connect","trying to connect"); //sends to log socket = new Socket(_ip, _portNum); //stops responding here. Log.i("Socket Connected", "Socket Connected"); //not sent to log output = new DataOutputStream(socket.getOutputStream()); input = new DataInputStream(socket.getInputStream()); }catch(UnknownHostException e){ }catch(IOException e){ } //IF STREAMS ARE OPEN SEND MESSAGES if (socket != null &amp;&amp; output != null &amp;&amp; input != null){ try{ //MESSAGES FOR TESTING output.writeBytes("HELLO2 \n"); String response; while((response = input.readLine()) != null){ System.out.println("Server: " + response); //MESSAGE FOR TESTING output.writeBytes("Test \n"); TextView test = (TextView) findViewById(R.id.TestText); // display text returned from server test.setText(response); } //CLOSE STREAMS AND CONNECTION output.close(); input.close(); socket.close(); Log.i("Connections closed", "Connections closed"); }catch(UnknownHostException e){ }catch(IOException e){ } } } </code></pre> <p>Any assistance is greatly apprectiated.</p>
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