fixed init of EventEmitter

android/app/src/main/java/com/reactnativenavigation/react/NavigationReactGateway.java

@@ -65,7 +65,6 @@ public class NavigationReactGateway implements ReactGateway {
     }
 
     public void onResumeActivity(Activity activity, DefaultHardwareBackBtnHandler defaultHardwareBackBtnHandler) {
-        reactEventEmitter = new NavigationReactEventEmitter(getReactContext());
         getReactInstanceManager().onHostResume(activity, defaultHardwareBackBtnHandler);
     }
 
@@ -77,6 +76,10 @@ public class NavigationReactGateway implements ReactGateway {
         return host;
     }
 
+    //TODO temp hack
+    void onReactContextInitialized() {
+        reactEventEmitter = new NavigationReactEventEmitter(getReactContext());
+    }
 
     private static class ReactNativeHostImpl extends ReactNativeHost implements ReactInstanceManager.ReactInstanceEventListener {
 
@@ -135,6 +138,7 @@ public class NavigationReactGateway implements ReactGateway {
 
         @Override
         public void onReactContextInitialized(ReactContext context) {
+            ((NavigationReactGateway) NavigationApplication.instance.getReactGateway()).onReactContextInitialized();
             NavigationApplication.instance.onReactInitialized(context);
         }