Show fab in ViewPager first screen

android/app/src/main/java/com/reactnativenavigation/layouts/SingleScreenLayout.java

             createStack(getScreenStackParent());
         }
         createFabAndSnackbarContainer();
+        sendScreenChangedEventAfterInitialPush();
     }
 
     private RelativeLayout getScreenStackParent() {
         stack.show();
     }
 
+    private void sendScreenChangedEventAfterInitialPush() {
+        if (screenParams.topTabParams != null) {
+            EventBus.instance.post(new ScreenChangedEvent(screenParams.topTabParams.get(0)));
+        } else {
+            EventBus.instance.post(new ScreenChangedEvent(screenParams));
+        }
+    }
+
     private void createFabAndSnackbarContainer() {
         snackbarAndFabContainer = new SnackbarAndFabContainer(getContext());
         RelativeLayout.LayoutParams lp = new LayoutParams(MATCH_PARENT, MATCH_PARENT);