Toolbar buttons

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

+package com.reactnativenavigation.views;
+
+import android.app.Activity;
+import android.graphics.drawable.Drawable;
+import android.support.annotation.ColorInt;
+import android.support.annotation.NonNull;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewTreeObserver;
+import android.widget.TextView;
+
+import com.reactnativenavigation.utils.ImageUtils;
+
+import java.util.ArrayList;
+
+public class Button {
+    public enum ShowAsAction {
+        IfRoom(MenuItem.SHOW_AS_ACTION_IF_ROOM),
+        Always(MenuItem.SHOW_AS_ACTION_ALWAYS),
+        Never(MenuItem.SHOW_AS_ACTION_NEVER),
+        WithText(MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+
+        int action;
+        ShowAsAction(int action) {
+            this.action = action;
+        }
+    }
+
+    String label;
+    Drawable icon;
+    @ColorInt
+    int color;
+    ShowAsAction showAsAction;
+
+    public MenuItem addToMenu(Activity context, Menu menu, int index) {
+        MenuItem item = menu.add(Menu.NONE, Menu.NONE, index, label);
+        setShowAsAction(item);
+        setIcon(item);
+        setColor(context, item);
+        return item;
+    }
+
+    private void setShowAsAction(MenuItem item) {
+        item.setShowAsAction(showAsAction.action);
+    }
+
+    private void setIcon(MenuItem item) {
+        if (icon != null) {
+            item.setIcon(icon);
+        }
+    }
+
+    private void setColor(Activity context, MenuItem item) {
+        if (!hasColor()) {
+            return;
+        }
+
+        if (hasIcon()) {
+            setIconColor();
+        } else {
+            setTextColor(context);
+        }
+    }
+
+    private void setTextColor(Activity context) {
+        final View decorView = context.getWindow().getDecorView();
+        decorView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
+            @Override
+            public void onGlobalLayout() {
+                decorView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
+
+                ArrayList<View> outViews = findButtonTextView();
+                setTextColorInternal(outViews);
+            }
+
+            @NonNull
+            private ArrayList<View> findButtonTextView() {
+                ArrayList<View> outViews = new ArrayList<>();
+                decorView.findViewsWithText(outViews, label, View.FIND_VIEWS_WITH_CONTENT_DESCRIPTION);
+                return outViews;
+            }
+
+            private void setTextColorInternal(ArrayList<View> outViews) {
+                for (View button : outViews) {
+                    ((TextView) button).setTextColor(color);
+                }
+            }
+        });
+    }
+
+    private void setIconColor() {
+        ImageUtils.tint(icon, color);
+    }
+
+    private boolean hasIcon() {
+        return icon != null;
+    }
+
+    private boolean hasColor() {
+        return color > 0;
+    }
+
+}

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

 package com.reactnativenavigation.views;
 
 import android.app.Activity;
-import android.graphics.drawable.Drawable;
-import android.support.annotation.ColorInt;
 import android.support.v7.widget.ActionMenuView;
 import android.support.v7.widget.Toolbar;
 import android.view.Menu;
 
 public class TitleBar extends Toolbar {
 
-    public static class Button {
-        public enum ShowAsAction {
-            IfRoom, Always, Never, WithText
-        }
+    private Menu menu;
+    private ActionMenuView actionMenuView;
+
 
-        String label;
-        Drawable icon;
-        @ColorInt int color;
-        ShowAsAction showAsAction;
-    }
 
     public TitleBar(Activity context) {
         super(context);
 
     private void createMenu() {
         MenuInflater menuInflater = ((Activity) getContext()).getMenuInflater();
-        ActionMenuView actionMenuView = new ActionMenuView(getContext());
-        Menu menu = actionMenuView.getMenu();
+        actionMenuView = new ActionMenuView(getContext());
+        menu = actionMenuView.getMenu();
         menuInflater.inflate(R.menu.stub, menu);
         addView(actionMenuView);
         // TODO: Maybe setSupportActionBar
     }
 
     public void setButtons(List<Button> buttons) {
-        Menu menu = new
+        removeView(actionMenuView);
+        createMenu();
+
+        Activity context = (Activity) getContext();
+        for (int i = 0; i < buttons.size(); i++) {
+            final Button button = buttons.get(i);
+            final int index = buttons.size() - i - 1;
+            button.addToMenu(context, menu, index);
+        }
     }
 }