StackOverflow2013

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POHow to prevent the application timeout?
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copied!<p>I have created a multithreaded application but it still hangs if the server is unavailable.</p> <p>In the main Activity I've created the following methods:</p> <pre><code>@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //bind GUI elements ... //start TCPConnection Service in a new thread establishTCPConnection(); ... } private void establishTCPConnection(){ TCPClientServiceThread = new Thread(null, backgroundConnection, "connection"); TCPClientServiceThread.start(); } .. private Runnable backgroundConnection = new Runnable(){ public void run(){ //establish TCP connection doEstablishTCPConnection(); } }; private void doEstablishTCPConnection() { //start TCPConnection service startService(new Intent(this, TCPClientService.class)); } </code></pre> <p>And this is the TCPClientService Class:</p> <pre><code>public class TCPClientService extends Service{ ... private String serverAddress = "192.168.1.5"; private int portNumber = 1000; @Override public void onCreate() { //TODO: Actions to perform when service is created connectionAvailable = false; IntentFilter dataReceiverFilter; dataReceiverFilter = new IntentFilter(MotranetClient.MOTION_DATA_UPDATED); dataReceiver = new DataReceiver(); registerReceiver(dataReceiver, dataReceiverFilter); EstablishConnection(); } @Override public IBinder onBind(Intent intent) { //TODO: Replace with service binding implementation return null; } private void EstablishConnection() { try { InetAddress serverAddr = InetAddress.getByName(serverAddress); Log.d("TCP", "C: Connecting..."); Socket socket = new Socket(serverAddr, portNumber); String message = "testing connection"; try { Log.d("TCP", "C: Sending: '" + message + "'"); PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())),true); out.println(message); Log.d("TCP", "C: Sent."); Log.d("TCP", "C: Done."); connectionAvailable = true; } catch(Exception e) { Log.e("TCP", "S: Error", e); connectionAvailable = false; } finally { socket.close(); announceNetworkAvailability(connectionAvailable); } } catch (Exception e) { Log.e("TCP", "C: Error", e); announceNetworkAvailability(connectionAvailable); } } } </code></pre> <p>When the server is unavailable the line </p> <pre><code>Socket socket = new Socket(serverAddr, portNumber); </code></pre> <p>causes some delay and I believe this is the cause for hanging. But if the TCPClientService Service is executing in its own thread I don't know why this affects the timeout of the main activity.</p> <p>I would be very thankful if anyone could show how to prevent the application from hanging when the server is unavailable.</p>

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