scroll content

android/app/src/main/java/com/reactnativenavigation/views/ContentView.java

 import com.facebook.react.ReactInstanceManager;
 import com.facebook.react.ReactRootView;
 
-public class ContentView extends ReactRootView {
+public class ContentView extends ReactRootView implements ScrollDirectionListener.OnChanged {
+
+    private final ScrollViewAttacher scrollViewAttacher;
 
     public ContentView(Context context, ReactInstanceManager reactInstanceManager, String moduleName, Bundle passProps) {
         super(context);
         startReactApplication(reactInstanceManager, moduleName, passProps);
+        scrollViewAttacher = new ScrollViewAttacher(this, this);
     }
 
     @Override
-    protected void onDetachedFromWindow() {
-        super.onDetachedFromWindow();
+    public void onScrollChanged(ScrollDirectionListener.Direction direction) {
+
     }
 }

android/app/src/main/java/com/reactnativenavigation/views/ScrollDirectionListener.java

     }
 
     public interface OnChanged {
-        void onChanged(Direction direction);
+        void onScrollChanged(Direction direction);
     }
 
     private final ViewGroup view;
         final int scrollY = view.getScrollY();
         if (isScrollPositionChanged(scrollY) && !isTopOverscroll(scrollY) && !isBottomOverscroll(scrollY)) {
             lastScrollY = scrollY;
-            onChanged.onChanged(getDirection(scrollY));
+            onChanged.onScrollChanged(getDirection(scrollY));
         }
     }