Flutter - 波浪动画和lottie动画的使用

demo 地址: https://github.com/iotjin/jh_flutter_demo
代码不定时更新，请前往github查看最新代码

波浪动画三方库wave

lottie动画
Lottie 是 Airbnb 开发的一款能够为原生应用添加动画效果的开源工具。具有丰富的动画效果和交互功能。

  # 波浪动画 https://pub-web.flutter-io.cn/packages/wave
  wave: ^0.2.2
  # lottie动画 https://pub-web.flutter-io.cn/packages/lottie
  lottie: ^2.4.0

效果图

波浪动画示例

class WavePage extends StatelessWidget {
  const WavePage({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: const BaseAppBar('波浪动画'),
      body: _body(),
    );
  }

  _body() {
    const backgroundColor = Color(0xFFF15BB5);

    const colors = [Color(0xFFFEE440), Color(0xFF00BBF9)];

    const durations = [3000, 6000];

    const heightPercentages = [0.65, 0.66];

    var waveView = WaveWidget(
      config: CustomConfig(
        colors: colors,
        durations: durations,
        heightPercentages: heightPercentages,
      ),
      backgroundColor: backgroundColor,
      size: const Size(double.infinity, double.infinity),
      waveAmplitude: 0,
    );

    return waveView;
  }
}

lottie动画示例

需要先准备好加载动画文件：将预先准备好的Lottie动画文件(.json格式)放入flutter项目的资源目录中。可以从Lottie官网下载或创建自定义动画文件。
然后使用 Lottie.asset('assets/xxx.json')加载Widget

import 'package:flutter/material.dart';
import 'package:lottie/lottie.dart';
import '/project/configs/project_config.dart';

class LottiePage extends StatefulWidget {
  const LottiePage({Key? key}) : super(key: key);

  @override
  State<LottiePage> createState() => _LottiePageState();
}

class _LottiePageState extends State<LottiePage> with TickerProviderStateMixin {
  late AnimationController _animationController1;
  late AnimationController _animationController2;

  @override
  void initState() {
    // TODO: implement initState
    super.initState();

    _init();
  }

  _init() {
    _animationController1 = AnimationController(vsync: this, duration: const Duration(seconds: 1));
    _animationController2 = AnimationController(vsync: this, duration: const Duration(seconds: 1));
  }

  _startAnimation1() {
    _animationController1
      ..reset()
      ..forward();
  }

  _startAnimation2() {
    _animationController2
      ..reset()
      ..forward();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: const BaseAppBar('Lottie 动画'),
      body: _body(),
    );
  }

  _body() {
    return ListView(
      children: [
        // Load a Lottie file from your assets
        Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Lottie.asset('assets/lottie/首页.json', width: 50, height: 50),
            Lottie.asset('assets/lottie/星球.json', width: 65, height: 65),
          ],
        ),

        Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            GestureDetector(
              onTap: () => _startAnimation1(),
              child: Lottie.asset(
                'assets/lottie/首页.json',
                width: 50,
                height: 50,
                controller: _animationController1,
                onLoaded: (composition) => _startAnimation1(),
              ),
            ),
            GestureDetector(
              onTap: () => _startAnimation2(),
              child: Lottie.asset(
                'assets/lottie/星球.json',
                width: 65,
                height: 65,
                controller: _animationController2,
                onLoaded: (composition) => _startAnimation2(),
              ),
            ),
          ],
        ),

        Lottie.asset('assets/lottie/Aniki Hamster.json', height: 200),

        // Load a Lottie file from a remote url
        Lottie.network('https://assets5.lottiefiles.com/packages/lf20_0LNPii4uOv.json'),
      ],
    );
  }
}