Cleanup TitleBar class a bit

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

 import android.animation.AnimatorListenerAdapter;
 import android.app.Activity;
 import android.content.Context;
-import android.content.ContextWrapper;
 import android.graphics.drawable.Drawable;
 import android.support.annotation.Nullable;
 import android.support.v7.widget.ActionMenuView;
 import android.view.animation.AccelerateDecelerateInterpolator;
 import android.view.animation.AccelerateInterpolator;
 import android.widget.TextView;
+
 import com.reactnativenavigation.params.BaseScreenParams;
 import com.reactnativenavigation.params.BaseTitleBarButtonParams;
 import com.reactnativenavigation.params.StyleParams;
         addButtonsToTitleBar(navigatorEventId, menu);
     }
 
-    public int getRightButtonsWidth() {
-        return actionMenuView.getWidth();
-    }
-
     public void setLeftButton(TitleBarLeftButtonParams leftButtonParams,
                               LeftButtonOnClickListener leftButtonOnClickListener,
                               String navigatorEventId,
         centerTitle(styleParams);
     }
 
-    private Activity getActivity() {
-        Context context = getContext();
-        while (context instanceof ContextWrapper) {
-            if (context instanceof Activity) {
-                return (Activity)context;
-            }
-            context = ((ContextWrapper)context).getBaseContext();
-        }
-        return null;
-    }
-
     private void centerTitle(final StyleParams params) {
         final View titleView = getTitleView();
         if (titleView == null) {
             @Override
             public void run() {
                 if (params.titleBarTitleTextCentered) {
-                    titleView.setX(ViewUtils.getWindowWidth(getActivity()) / 2 - titleView.getWidth() / 2);
+                    titleView.setX(ViewUtils.getWindowWidth((Activity) getContext()) / 2 - titleView.getWidth() / 2);
                 }
             }
         });