94 lines
2.5 KiB
Dart
94 lines
2.5 KiB
Dart
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import 'package:flutter/material.dart';
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void main() {
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runApp(const UseAnimation());
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}
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class UseAnimation extends StatefulWidget {
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const UseAnimation({super.key});
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@override
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State<UseAnimation> createState() => _UseAnimationState();
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}
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class _UseAnimationState extends State<UseAnimation>
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with SingleTickerProviderStateMixin {
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late AnimationController _controller;
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late Animation<double> _tween;
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@override
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void initState() {
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_controller = AnimationController(vsync: this);
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_tween = Tween<double>(begin: 0, end: 1).animate(_controller)
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..addStatusListener((status) {
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// print(status);
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})
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..addListener(() {
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setState(() {});
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});
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// _controller.forward();
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super.initState();
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}
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@override
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void dispose() {
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super.dispose();
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_controller.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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title: 'Use Animation',
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home: Scaffold(
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appBar: AppBar(title: const Text('use animation')),
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body: Center(
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child: SizedBox(
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height: 300,
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width: 200,
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child: Stack(
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alignment: Alignment.center,
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children: [
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Image.asset('assets/images/user_2.png'),
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Positioned.fill(
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child: Container(
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color: _tween.value == 1.0
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? null
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: const Color.fromARGB(255, 36, 36, 36)
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.withOpacity(0.3),
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child: Center(
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child: Text(
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(_tween.value * 100).toStringAsFixed(1),
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style: const TextStyle(
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color: Colors.green,
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fontSize: 24,
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),
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),
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),
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),
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),
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CircularProgressIndicator(
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value: _tween.value,
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),
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],
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),
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),
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),
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floatingActionButton: FloatingActionButton(
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onPressed: () {
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if (_tween.value == 1.0) {
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_controller.reset();
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}
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print(_tween.value);
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// print(_controller.value);
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_controller.animateTo(_tween.value + 0.1,
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duration: const Duration(milliseconds: 200));
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print(_tween.value);
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},
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child: const Icon(Icons.plus_one),
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),
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),
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);
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}
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}
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