Add MenuItem click listener

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

 import android.content.Context;
 import android.graphics.Color;
 import android.os.Build;
+import android.view.MenuItem;
 import android.view.Window;
 import android.widget.LinearLayout;
 
 import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
 import static android.view.ViewGroup.LayoutParams.WRAP_CONTENT;
 
-public class ScreenLayout extends LinearLayout implements ScrollDirectionListener.OnScrollChanged {
+public class ScreenLayout extends LinearLayout implements ScrollDirectionListener.OnScrollChanged, MenuItem.OnMenuItemClickListener {
 
     private final ScreenParams screenParams;
     private ContentView contentView;
     }
 
     private void addTitleBar() {
-        topBar.addTitleBarAndSetButtons(screenParams.buttons);
+        topBar.addTitleBarAndSetButtons(screenParams.buttons, this);
         topBar.setTitle(screenParams.title);
     }
 
     public void onScrollChanged(ScrollDirectionListener.Direction direction) {
 
     }
+
+    @Override
+    public boolean onMenuItemClick(MenuItem item) {
+        
+        return false;
+    }
 }

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

 
 import android.content.Context;
 import android.support.design.widget.AppBarLayout;
+import android.view.MenuItem;
 
 import com.reactnativenavigation.params.TitleBarButtonParams;
 import com.reactnativenavigation.views.TitleBar;
         setFitsSystemWindows(true);
     }
 
-    public void addTitleBarAndSetButtons(List<TitleBarButtonParams> buttons) {
+    public void addTitleBarAndSetButtons(List<TitleBarButtonParams> buttons, MenuItem.OnMenuItemClickListener onTitleBarButtonClickListener) {
         titleBar = new TitleBar(getContext());
         addView(titleBar);
-        titleBar.setButtons(buttons);
+        titleBar.setButtons(buttons, onTitleBarButtonClickListener);
     }
 
     public void setTitleBarVisibility(boolean isHidden) {

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

 import android.content.Context;
 import android.support.v7.widget.Toolbar;
 import android.view.Menu;
+import android.view.MenuItem;
 
 import com.reactnativenavigation.animation.HideOnScrollAnimator;
 import com.reactnativenavigation.params.TitleBarButtonParams;
         super(context);
     }
 
-    public void setButtons(List<TitleBarButtonParams> buttons) {
+    public void setButtons(List<TitleBarButtonParams> buttons, MenuItem.OnMenuItemClickListener onTitleBarButtonClickListener) {
         Menu menu = getMenu();
         menu.clear();
 
         for (int i = 0; i < buttons.size(); i++) {
-            final TitleBarButton button = new TitleBarButton(menu, this, buttons.get(i));
+            final TitleBarButton button = new TitleBarButton(menu, this, buttons.get(i), onTitleBarButtonClickListener);
             // Add button in reverse order because in iOS index 0 starts at right
             final int index = buttons.size() - i - 1;
             button.addToMenu(index);

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

     private final Menu menu;
     private final View parent;
     private TitleBarButtonParams buttonParams;
+    private MenuItem.OnMenuItemClickListener onMenuItemClickListener;
 
-    public TitleBarButton(Menu menu, View parent, TitleBarButtonParams buttonParams) {
+    public TitleBarButton(Menu menu, View parent, TitleBarButtonParams buttonParams, MenuItem.OnMenuItemClickListener onMenuItemClickListener) {
         this.menu = menu;
         this.parent = parent;
         this.buttonParams = buttonParams;
+        this.onMenuItemClickListener = onMenuItemClickListener;
     }
 
     public MenuItem addToMenu(int index) {
         item.setEnabled(buttonParams.enabled);
         setIcon(item);
         setColor();
+        item.setOnMenuItemClickListener(onMenuItemClickListener);
         return item;
     }