extended_image 0.5.2 extended_image: ^0.5.2 copied to clipboard
extended official image which support placeholder(loading)/ failed state,cache network,zoom pan image,photo view,slide out page,crop,save,paint etc.
import 'package:example/common/tu_chong_repository.dart';
import 'package:example/custom_image_demo.dart';
import 'package:example/crop_image_demo.dart';
import 'package:example/image_demo.dart';
import 'package:example/image_list_demo.dart';
import 'package:example/paint_image_demo.dart';
import 'package:example/photo_view_demo.dart';
import 'package:example/zoom_image_demo.dart';
import 'package:extended_image/extended_image.dart';
import 'package:flutter/material.dart';
import 'package:image_picker_saver/image_picker_saver.dart';
import "package:oktoast/oktoast.dart";
import 'package:flutter_screenutil/flutter_screenutil.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return OKToast(
child: 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'),
),
);
}
}
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> {
List<Page> pages = new List<Page>();
TuChongRepository listSourceRepository;
@override
void initState() {
pages.add(Page(
PageType.Image,
"cache image"
"save to photo Library"
"image border,shape,borderRadius"));
pages.add(Page(PageType.List, "show cache image in list"));
pages
.add(Page(PageType.Custom, "show image with loading,failed,animation"));
pages.add(Page(PageType.Crop, "show how to crop image"));
pages.add(Page(PageType.Paint, "show how to paint any thing before image"));
pages.add(Page(PageType.Zoom, "show how to zoom/pan image"));
pages.add(Page(PageType.PhotoView,
"show how to zoom/pan image in page view like WeChat"));
///clear cache image from 7 days before
clearDiskCachedImages(duration: Duration(days: 7));
listSourceRepository = new TuChongRepository();
listSourceRepository.loadData().then((result) {
if (listSourceRepository.length > 0)
_imageTestUrl = listSourceRepository.first.imageUrl;
});
super.initState();
}
@override
Widget build(BuildContext context) {
var content = ListView.builder(
itemBuilder: (_, int index) {
var page = pages[index];
Widget pageWidget;
return Container(
margin: EdgeInsets.all(20.0),
child: GestureDetector(
behavior: HitTestBehavior.translucent,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
(index + 1).toString() +
"." +
page.type.toString().replaceAll("PageType.", ""),
//style: TextStyle(inherit: false),
),
Text(
page.description,
style: TextStyle(color: Colors.grey),
)
],
),
onTap: () {
switch (page.type) {
case PageType.Image:
pageWidget = new ImageDemo();
break;
case PageType.List:
pageWidget = ImageListDemo();
break;
case PageType.Custom:
pageWidget = CustomImageDemo();
break;
case PageType.Crop:
pageWidget = CropImageDemo();
break;
case PageType.Paint:
pageWidget = PaintImageDemo();
break;
case PageType.Zoom:
pageWidget = ZoomImageDemo();
break;
case PageType.PhotoView:
pageWidget = PhotoViewDemo();
break;
default:
break;
}
Navigator.push(context,
new MaterialPageRoute(builder: (BuildContext context) {
return pageWidget;
}));
},
),
);
},
itemCount: pages.length,
);
return MaterialApp(
builder: (c, w) {
ScreenUtil.instance =
ScreenUtil(width: 750, height: 1334, allowFontScaling: true)
..init(c);
var data = MediaQuery.of(context);
return MediaQuery(
data: data.copyWith(textScaleFactor: 1.0),
child: Scaffold(
body: w,
floatingActionButton: FloatingActionButton(
onPressed: () {
///clear memory
clearMemoryImageCache();
///clear local cahced
clearDiskCachedImages().then((bool done) {
showToast(done ? "clear succeed" : "clear failed",
position: ToastPosition(align: Alignment.center));
});
},
child: Text(
"clear cache",
textAlign: TextAlign.center,
style: TextStyle(
inherit: false,
),
),
),
),
);
},
home: content,
);
}
}
class Page {
final PageType type;
final String description;
Page(this.type, this.description);
}
enum PageType { Image, List, Custom, Crop, Paint, Zoom, PhotoView }
String _imageTestUrl;
String get imageTestUrl =>
_imageTestUrl ?? "https://photo.tuchong.com/4870004/f/298584322.jpg";
///save netwrok image to photo
Future<bool> saveNetworkImageToPhoto(String url, {bool useCache: true}) async {
var data = await getNetworkImageData(url, useCache: useCache);
var filePath = await ImagePickerSaver.saveFile(fileData: data);
return filePath != null && filePath != "";
}