请支持原文：http://tryenough.com/images-animation
效果如下图：
代码
import 'package:flutter/material.dart';import 'package:sprintf/sprintf.dart'; //这个是一个拼接字符串的flutter库，主要是为了使用方便，你可以选择不使用，这样的话你需要自己拼接图片路径class ImagesAnimation extends StatefulWidget { final double w; final double h; final ImagesAnimationEntry entry; final int durationSeconds; ImagesAnimation({Key key, this.w : 80, this.h : 80, this.entry, this.durationSeconds : 3}):super(key:key); @override _InState createState() { return _InState(); }}class _InState extends State<ImagesAnimation> with TickerProviderStateMixin{ AnimationController _controller; Animation<int> _animation; @override void initState() { super.initState(); _controller = new AnimationController(vsync: this, duration: Duration(seconds: widget.durationSeconds)) ..repeat(); _animation = new IntTween(begin: widget.entry.lowIndex, end: widget.entry.highIndex).animate(_controller);//widget.entry.lowIndex 表示从第几下标开始，如0；widget.entry.highIndex表示最大下标：如7 } @override Widget build(BuildContext context) { return new AnimatedBuilder( animation: _animation, builder: (BuildContext context, Widget child) { String frame = _animation.value.toString(); return new Image.asset( sprintf(widget.entry.basePath, [frame]), //根据传进来的参数拼接路径 gaplessPlayback: true, //避免图片闪烁 width: widget.w, height: widget.h, ); }, ); }}class ImagesAnimationEntry { int lowIndex = 0; int highIndex = 0; String basePath; ImagesAnimationEntry(this.lowIndex, this.highIndex, this.basePath);}
请支持原文：http://tryenough.com/images-animation
使用的地方：
ImagesAnimation(w: 100, h: 100, entry: ImagesAnimationEntry(1, 7, "images/men_sport_%s.png")),//"images/men_sport_%s.png" 表示图片在你本地的路径，%s会被下标代替