pubspec.yaml

avatar_glow:

main.dart

import 'package:avatar_glow/avatar_glow.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:reflectly_flutter_loginpage/delayed_animation.dart';

void main() {
  SystemChrome.setEnabledSystemUIOverlays([]);
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> with SingleTickerProviderStateMixin {
  final int delayedAmount = 500;
  double _scale;
  AnimationController _controller;
  @override
  void initState() {
    _controller = AnimationController(
      vsync: this,
      duration: Duration(
        milliseconds: 200,
      ),
      lowerBound: 0.0,
      upperBound: 0.1,
    )..addListener(() {
        setState(() {});
      });
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    final color = Colors.white;
    _scale = 1 - _controller.value;
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
          backgroundColor: Color(0xFF8185E2),
          body: Center(
            child: Column(
              children: <Widget>[
                AvatarGlow(
                  endRadius: 90,
                  duration: Duration(seconds: 2),
                  glowColor: Colors.white24,
                  repeat: true,
                  repeatPauseDuration: Duration(seconds: 2),
                  startDelay: Duration(seconds: 1),
                  child: Material(
                      elevation: 8.0,
                      shape: CircleBorder(),
                      child: CircleAvatar(
                        backgroundColor: Colors.grey[100],
                        child: FlutterLogo(
                          size: 50.0,
                        ),
                        radius: 50.0,
                      )),
                ),
                DelayedAimation(
                  child: Text(
                    "Hi There",
                    style: TextStyle(
                        fontWeight: FontWeight.bold,
                        fontSize: 35.0,
                        color: color),
                  ),
                  delay: delayedAmount + 1000,
                ),
                DelayedAimation(
                  child: Text(
                    "I'm Reflectly",
                    style: TextStyle(
                        fontWeight: FontWeight.bold,
                        fontSize: 35.0,
                        color: color),
                  ),
                  delay: delayedAmount + 2000,
                ),
                SizedBox(
                  height: 30.0,
                ),
                DelayedAimation(
                  child: Text(
                    "Your New Personal",
                    style: TextStyle(fontSize: 20.0, color: color),
                  ),
                  delay: delayedAmount + 3000,
                ),
                DelayedAimation(
                  child: Text(
                    "Journaling  companion",
                    style: TextStyle(fontSize: 20.0, color: color),
                  ),
                  delay: delayedAmount + 3000,
                ),
                SizedBox(
                  height: 100.0,
                ),
                DelayedAimation(
                child: GestureDetector(
                  onTapDown: _onTapDown,
                  onTapUp: _onTapUp,
                  child: Transform.scale(
                    scale: _scale,
                    child: _animatedButtonUI,
                  ),
                ),
                delay: delayedAmount + 4000,
              ),
              SizedBox(height: 50.0,),
                DelayedAimation(
                  child: Text(
                    "I Already have An Account".toUpperCase(),
                    style: TextStyle(
                        fontSize: 20.0,
                        fontWeight: FontWeight.bold,
                        color: color),
                  ),
                  delay: delayedAmount + 5000,
                ),
              ],
            ),
          )
          //  Column(
          //   mainAxisAlignment: MainAxisAlignment.center,
          //   children: <Widget>[
          //     Text('Tap on the Below Button',style: TextStyle(color: Colors.grey[400],fontSize: 20.0),),
          //     SizedBox(
          //       height: 20.0,
          //     ),
          //      Center(

          //   ),
          //   ],

          // ),
          ),
    );
  }

  Widget get _animatedButtonUI => Container(
        height: 60,
        width: 270,
        decoration: BoxDecoration(
          borderRadius: BorderRadius.circular(100.0),
          color: Colors.white,
        ),
        child: Center(
          child: Text(
            'Hi Reflectly',
            style: TextStyle(
              fontSize: 20.0,
              fontWeight: FontWeight.bold,
              color: Color(0xFF8185E2),
            ),
          ),
        ),
      );

  void _onTapDown(TapDownDetails details) {
    _controller.forward();
  }

  void _onTapUp(TapUpDetails details) {
    _controller.reverse();
  }
}

delayed_animation.dart

import 'dart:async';

import 'package:flutter/material.dart';

class DelayedAimation extends StatefulWidget {
  final Widget child;
  final int delay;

  DelayedAimation({@required this.child, this.delay});

  @override
  _DelayedAimationState createState() => _DelayedAimationState();
}

class _DelayedAimationState extends State<DelayedAimation>
    with TickerProviderStateMixin {
  AnimationController _controller;
  Animation<Offset> _animOffset;

  @override
  void initState() {
    super.initState();

    _controller =
        AnimationController(vsync: this, duration: Duration(milliseconds: 800));
    final curve =
        CurvedAnimation(curve: Curves.decelerate, parent: _controller);
    _animOffset =
        Tween<Offset>(begin: const Offset(0.0, 0.35), end: Offset.zero)
            .animate(curve);

    if (widget.delay == null) {
      _controller.forward();
    } else {
      Timer(Duration(milliseconds: widget.delay), () {
        _controller.forward();
      });
    }
  }

  @override
  void dispose() {
    super.dispose();
    _controller.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return FadeTransition(
      child: SlideTransition(
        position: _animOffset,
        child: widget.child,
      ),
      opacity: _controller,
    );
  }
}