don't activate switch on early fail

src/de/tudarmstadt/informatik/hostage/ui/adapter/ServicesListAdapter.java

@@ -155,15 +155,19 @@ public class ServicesListAdapter extends ArrayAdapter<ServicesListItem> {
                                     }
                                 }
                                 else if (!MainActivity.getInstance().getHostageService().isRunning(item.protocol)) {
-                                    MainActivity.getInstance().getHostageService().startListener(item.protocol);
-
-                                    //set the main switch to null, so that he won't react and starts all protocols
-                                    mServicesSwitch.setOnCheckedChangeListener(null);
-                                    mServicesSwitch.setChecked(true);
-                                    mServicesSwitch.setOnCheckedChangeListener(mListener);
-                                    if(!buttonView.isChecked()) {
-                                        buttonView.setChecked(true);
-                                    }
+                                    boolean success = MainActivity.getInstance().getHostageService().startListener(item.protocol);
+
+									if (success) {
+										//set the main switch to null, so that he won't react and starts all protocols
+										mServicesSwitch.setOnCheckedChangeListener(null);
+										mServicesSwitch.setChecked(true);
+										mServicesSwitch.setOnCheckedChangeListener(mListener);
+										if (!buttonView.isChecked()) {
+											buttonView.setChecked(true);
+										}
+									} else {
+										buttonView.setChecked(false);
+									}
                                 } else {
                                     if(!buttonView.isChecked()) {
                                         buttonView.setChecked(true);