Remove previous ContextualMenu before adding new one

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

 
     public void onActivityResult(int requestCode, int resultCode, Intent data) {
         Activity currentActivity = getReactInstanceManager().getCurrentReactContext().getCurrentActivity();
-        getReactInstanceManager().onActivityResult(currentActivity, requestCode, resultCode, data);
+        getReactInstanceManager().onActivityResult(requestCode, resultCode, data);
     }
 
     public ReactNativeHost getReactNativeHost() {

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

     }
 
     public void show() {
+        this.show(null);
+    }
+
+    public void show(final @Nullable Runnable onDisplayed) {
         setAlpha(0);
         animate()
                 .alpha(1)
                 .setDuration(200)
-                .setInterpolator(new AccelerateDecelerateInterpolator());
+                .setInterpolator(new AccelerateDecelerateInterpolator())
+                .setListener(new AnimatorListenerAdapter() {
+                    @Override
+                    public void onAnimationEnd(Animator animation) {
+                        if (onDisplayed != null) {
+                            onDisplayed.run();
+                        }
+                    }
+                });
     }
 }

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

     }
 
     public void showContextualMenu(final ContextualMenuParams params, StyleParams styleParams, Callback onButtonClicked) {
+        final ContextualMenu menuToRemove = contextualMenu != null ? contextualMenu : null;
         contextualMenu = new ContextualMenu(getContext(), params, styleParams, onButtonClicked);
         titleBarAndContextualMenuContainer.addView(contextualMenu, new ViewGroup.LayoutParams(MATCH_PARENT, WRAP_CONTENT));
         ViewUtils.runOnPreDraw(contextualMenu, new Runnable() {
             @Override
             public void run() {
                 titleBar.hide();
-                contextualMenu.show();
+                contextualMenu.show(new Runnable() {
+                    @Override
+                    public void run() {
+                        if (menuToRemove != null) {
+                           titleBarAndContextualMenuContainer.removeView(menuToRemove);
+                        }
+                    }
+                });
             }
         });
     }
 
     public void onContextualMenuHidden() {
+        contextualMenu = null;
         titleBar.show();
     }