I am having a problem Running a network service when my app connects to a WiFi network. I am getting a the following exception,
java.net.SocketException: socket failed: ENONET (Machine is not on the network)
in the openPort() method bellow
BroadcastReceiver
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(action)) {
NetworkInfo networkInfo = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
if (networkInfo.getState() == NetworkInfo.State.CONNECTED) {
welcomeService = new BroadcastService(context, "Welcome");
Log.i(TAG, "onReceive: SUPPLICANT-STATE ---> Connected");
//do something
if (!serviceRegistered) {
welcomeService.registerService();
serviceRegistered = true;
}
}
if (networkInfo.getState() == NetworkInfo.State.DISCONNECTED) {
Log.i(TAG, "onReceive: SUPPLICANT-STATE ---> Disconnected");
//do something
unRegisterService();
}
}
}
public void unRegisterService() {
if (serviceRegistered && welcomeService != null) {
welcomeService.unregisterService();
serviceRegistered = false;
}
}
BroadcastService
public void registerService() {
NsdServiceInfo serviceInfo = new NsdServiceInfo();
serviceInfo.setServiceName(mServiceName);
serviceInfo.setServiceType("_http._tcp.");
serviceInfo.setPort(openPort());
mNsdManager = (NsdManager) mContext.getSystemService(Context.NSD_SERVICE);
mNsdManager.registerService(serviceInfo, NsdManager.PROTOCOL_DNS_SD, mRegistrationListener);
}
private int openPort() {
try{
// Line that throws the exception
return new ServerSocket(0).getLocalPort();
}catch (IOException ioe){
Crashlytics.logException(ioe);
ioe.printStackTrace();
return 0;
}
}
This the Broadcast Receiver only runs on when the main activity is showing. and it works fine on the first run but when I change the WiFi network this happens. Help world be greatly appreciated.