flutter_gifimage/example/lib/main.dart

import 'dart:convert';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_gifimage/flutter_gifimage.dart';
void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

const base64_url = "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

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

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

class _MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {

  GifController controller1,controller2,controller3,controller4;

  @override
  void initState() {
    // TODO: implement initState
    controller1 = GifController(vsync: this);
    controller2 = GifController(vsync: this);
    controller4= GifController(vsync: this);
    WidgetsBinding.instance.addPostFrameCallback((_){
      controller1.repeat(min: 0,max: 53,period: Duration(milliseconds: 200));
    });
    WidgetsBinding.instance.addPostFrameCallback((_){
      controller2.repeat(min: 0,max: 13,period: Duration(milliseconds: 200));
      controller4.repeat(min: 0,max: 13,period: Duration(milliseconds: 200));
    });
    controller3 = GifController(vsync: this,duration: Duration(milliseconds: 200),reverseDuration: Duration(milliseconds: 200));
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return DefaultTabController(length: 2,
    child: Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
        bottom: TabBar(
          tabs: <Widget>[Tab(child: Text("不同类型图片"),),Tab(child: Text("控制方式"),)],
        ),
      ),
      body: TabBarView(
        children: <Widget>[
          ListView(
            children: <Widget>[
              Text("资源"),
              GifImage(
                controller: controller1,
                image: AssetImage("images/animate.gif"),
              ),
              Text("网络"),
              GifImage(
                controller: controller2,
                image: NetworkImage("http://img.mp.itc.cn/upload/20161107/5cad975eee9e4b45ae9d3c1238ccf91e.jpg"),
              ),
              Text("内存"),
              GifImage(
                controller: controller4,
                image: MemoryImage(base64Decode(base64_url)),
              )
            ],
          ),
          Column(
            children: <Widget>[
              Row(
                children: <Widget>[
                  RaisedButton(
                    child: Text("无限循环"),
                    onPressed: (){
                      controller3.repeat(min: 0,max: 25,period: Duration(milliseconds: 500));
                    },
                  ),
                  RaisedButton(
                    child: Text("暂停"),
                    onPressed: (){
                      controller3.stop();
                    },
                  ),
                  RaisedButton(
                    child: Text("播放到末尾一次"),
                    onPressed: (){
                      controller3.animateTo(52,duration: Duration(milliseconds: 1000));
                    },
                  )
                ],
              ),
              Slider(
                  onChanged: (v){
                    controller3.value = v;
                    setState(() {

                    });
                  },
                max: 53,
                min: 0,
                value: controller3.value,
              ),
              GifImage(
                controller: controller3,
                image: AssetImage("images/animate.gif"),
              ),
            ],
          )
        ],
      ),
    ),);
  }
}