Flutter-Transiton-2.dart

import 'package:flutter/material.dart';

// usage for this route
//  Navigator.push(context, AppTransRoute(builder: (context) => new SecondPage(),),);
class AppTransRoute<T> extends MaterialPageRoute<T> {
  AppTransRoute({WidgetBuilder builder, RouteSettings settings})
      : super(builder: builder, settings: settings);

  @override
  Widget buildTransitions(BuildContext context, Animation<double> animation,
      Animation<double> secondaryAnimation, Widget child) {
    if (settings.isInitialRoute) return child;
    return new RotationTransition(
      turns: animation,
      child: new ScaleTransition(
        scale: animation,
        child: new FadeTransition(
          opacity: animation,
          child: child,
        ),
      ),
    );
  }
}