ReactContext initialized listener on NavigationApplication

android/app/src/main/java/com/reactnativenavigation/NavigationApplication.java

 import android.support.annotation.Nullable;
 
 import com.facebook.react.ReactPackage;
+import com.facebook.react.bridge.ReactContext;
 import com.facebook.react.bridge.WritableMap;
 import com.reactnativenavigation.react.NavigationReactGateway;
 import com.reactnativenavigation.react.ReactGateway;
 
     public abstract boolean isDebug();
 
+    /**
+     * override to listen to react initialization event
+     */
+    public void onReactInitialized(ReactContext reactContext) {
+        // nothing
+    }
+
     @Nullable
     public abstract List<ReactPackage> createAdditionalReactPackages();
 
         }
         reactGateway.getReactEventEmitter().sendEvent(eventId, arguments);
     }
+
 }

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

 import java.util.ArrayList;
 import java.util.List;
 
-public class NavigationReactGateway implements ReactGateway {
+public class NavigationReactGateway implements ReactGateway, ReactInstanceManager.ReactInstanceEventListener {
 
     private OnJsDevReloadListener onJsDevReloadListener;
     private ReactInstanceManager reactInstanceManager;
         reactInstanceManager = createReactInstanceManager();
     }
 
+    @Override
     public void startReactContextOnceInBackgroundAndExecuteJS() {
         if (reactInstanceManager == null) {
             reactInstanceManager = createReactInstanceManager();
         }
+
         if (!reactInstanceManager.hasStartedCreatingInitialContext()) {
             reactInstanceManager.createReactContextInBackground();
         }
     public void onDestroyApp() {
         reactInstanceManager.onHostDestroy();
         reactInstanceManager.destroy();
+        reactInstanceManager.removeReactInstanceEventListener(this);
         reactInstanceManager = null;
     }
 
             replaceJsDevReloadListener(manager);
         }
 
+        manager.addReactInstanceEventListener(this);
+
         return manager;
     }
 
 
         list.addAll(additionalReactPackages);
     }
+
+    @Override
+    public void onReactContextInitialized(ReactContext context) {
+        NavigationApplication.instance.onReactInitialized(context);
+    }
 }