在pubspec.yaml文件添加插件

image_gallery_saver安装1.5.0版本就好了，我之前安装的1.6.6会报错

  # 权限控制插件permission_handler: 5.0.1permission_handler_platform_interface: ^2.0.1# 文件保存插件image_gallery_saver: 1.5.0

记得安装一下

flutter pub get

android和ios配置

ios 修改文件

在ios/Runner/Info.plist添加以下代码

 <key>NSPhotoLibraryUsageDescription</key><string></string><key>NSPhotoLibraryAddUsageDescription</key><string>请允许APP保存图片到相册</string>

android 修改文件

在android/app/src/main/AndroidManifest.xml添加以下代码

    <uses-permission android:name="android.permission.INTERNET"/><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

将需要生成图片的组件用RepaintBoundary包裹

GlobalKey globalKey = GlobalKey();
RepaintBoundary(key: globalKey,child:Text('我要生成图片'),)

保存图片到相册

在点击事件里调用这个方法就可以了

 /// 保存图片static Future<void> saveImage(GlobalKey globalKey) async {RenderRepaintBoundary boundary =globalKey.currentContext.findRenderObject();var image = await boundary.toImage(pixelRatio: 6.0);ByteData byteData = await image.toByteData(format: ui.ImageByteFormat.png);Uint8List pngBytes = byteData.buffer.asUint8List();// final result = await ImageGallerySaver.saveImage(pngBytes,//     quality: 60, name: "hello");// if (result) {//   print('ok');//   // toast("保存成功", wring: false);// } else {//   print('error');// }if (Platform.isIOS) {var status = await Permission.photos.status;if (status.isUndetermined) {Map<Permission, PermissionStatus> statuses = await [Permission.photos,].request();saveImage(globalKey);}if (status.isGranted) {final result = await ImageGallerySaver.saveImage(pngBytes,quality: 60, name: "hello");if (result) {print('ok');// toast("保存成功", wring: false);} else {print('error');// toast("保存失败");}}if (status.isDenied) {print("IOS拒绝");}} else if (Platform.isAndroid) {var status = await Permission.storage.status;if (status.isUndetermined) {Map<Permission, PermissionStatus> statuses = await [Permission.storage,].request();saveImage(globalKey);}if (status.isGranted) {print("Android已授权");final result = await ImageGallerySaver.saveImage(pngBytes, quality: 60);if (result != null) {print('ok');// toast("保存成功", wring: false);} else {print('error');// toast("保存失败");}}if (status.isDenied) {print("Android拒绝");}}}

完整demo代码

import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:interviewer_app/common/component_index.dart';
// 一定要引入这三个插件
import 'package:image_gallery_saver/image_gallery_saver.dart';
import 'package:permission_handler_platform_interface/permission_handler_platform_interface.dart';
import 'package:permission_handler/permission_handler.dart';import 'package:flutter/services.dart';
import 'dart:ui' as ui;
import 'dart:typed_data';
import 'dart:io';class ShareJob extends StatefulWidget {const ShareJob({Key key, this.searchKey}) : super(key: key);final String searchKey;@overrideState<StatefulWidget> createState() {return new _ShareJobState();}
}class _ShareJobState extends State<ShareJob> {// globalKey 在这里设置GlobalKey globalKey = GlobalKey();Uint8List newPngBytes;Widget shareImage() {returnRepaintBoundary(key: globalKey,child:Container(child:// 图片Row(mainAxisAlignment: MainAxisAlignment.spaceAround,children: [Container(alignment: Alignment.center,decoration: BoxDecoration(color: Color(0xFF5B9AFF),boxShadow:[BoxShadow(color: Color(0x1A000000),offset: Offset(0, 5.0),blurRadius: 24.0),]),width: MediaQuery.of(context).size.width * 0.6,child:Column(children: [Gaps.vGap25,Text('热招职位', style: TextStyle(fontSize: 22, color: Colors.white, fontWeight: FontWeight.w300),),Gaps.vGap25,Container(margin: EdgeInsets.only(bottom: 22,left: 15,right: 15),// padding: EdgeInsets.only(bottom: 22,left: 15,right: 15),alignment: Alignment.center,decoration: BoxDecoration(color: Colors.white,borderRadius: BorderRadius.circular(10.0),boxShadow:[BoxShadow(color: Color(0x1A000000),offset: Offset(0, 5.0),blurRadius: 24.0),]),// padding: EdgeInsets.all(10),// margin: EdgeInsets.only(bottom: 6),// width: MediaQuery.of(context).size.width * 0.6,// height: 305,child: Column(children: [Gaps.vGap25,Gaps.vGap10,Text('测试工程师', style: TextStyle(fontSize: 15, color: Color(0xFF313753), fontWeight: FontWeight.w500),),Gaps.vGap10,Text('15k-20K | 上海', style: TextStyle(fontSize: 15, color: Color(0xFFF4A25A), fontWeight: FontWeight.w500),),Gaps.vGap10,Text('公司名', style: TextStyle(fontSize: 10, color: Color(0xFF313753), fontWeight: FontWeight.w400),),Gaps.vGap15,Image.asset(Utils.getImgPath('checked'),width: 115.0),Gaps.vGap25,Text('长按查看职位详情', style: TextStyle(fontSize: 9, color: Color(0xFF313753), fontWeight: FontWeight.w400),),Gaps.vGap25,],),),],),),],),));}/// 保存图片static Future<void> saveImage(GlobalKey globalKey) async {RenderRepaintBoundary boundary =globalKey.currentContext.findRenderObject();var image = await boundary.toImage(pixelRatio: 6.0);ByteData byteData = await image.toByteData(format: ui.ImageByteFormat.png);Uint8List pngBytes = byteData.buffer.asUint8List();// final result = await ImageGallerySaver.saveImage(pngBytes,//     quality: 60, name: "hello");// if (result) {//   print('ok');//   // toast("保存成功", wring: false);// } else {//   print('error');// }if (Platform.isIOS) {var status = await Permission.photos.status;if (status.isUndetermined) {Map<Permission, PermissionStatus> statuses = await [Permission.photos,].request();saveImage(globalKey);}if (status.isGranted) {final result = await ImageGallerySaver.saveImage(pngBytes,quality: 60, name: "hello");if (result) {print('ok');// toast("保存成功", wring: false);} else {print('error');// toast("保存失败");}}if (status.isDenied) {print("IOS拒绝");}} else if (Platform.isAndroid) {var status = await Permission.storage.status;if (status.isUndetermined) {Map<Permission, PermissionStatus> statuses = await [Permission.storage,].request();saveImage(globalKey);}if (status.isGranted) {print("Android已授权");final result = await ImageGallerySaver.saveImage(pngBytes, quality: 60);if (result != null) {print('ok');// toast("保存成功", wring: false);} else {print('error');// toast("保存失败");}}if (status.isDenied) {print("Android拒绝");}}}@overrideWidget build(BuildContext context) {return new Scaffold(appBar: AppBar(title: Text('分享职位'), titleSpacing: 0, centerTitle: true),body: SingleChildScrollView(child: Container(child: Column(children: [Gaps.vGap25,Row(children: [// http://images.shejidaren.com/wp-content/uploads/2020/03/36365-4.png// IconButton(//   iconSize: 22,//   icon: const Icon(Icons.close),//   onPressed: (){//   },// )Gaps.hGap30,Gaps.hGap10,Gaps.hGap10,Column(children: [Container(decoration: new BoxDecoration(color: Cor.roundbg_1,borderRadius: BorderRadius.circular(100),),padding: EdgeInsets.all(10),margin: EdgeInsets.only(bottom: 6),width: 60,height: 60,child: Image.network('http://images.shejidaren.com/wp-content/uploads/2020/03/36365-4.png'),),Text('微信好友',textAlign: TextAlign.center,style: TextStyle(color: Cor.black_1, fontSize: 14),)],),Gaps.hGap30,Gaps.hGap10,Gaps.hGap10,Column(children: [Container(decoration: new BoxDecoration(color: Cor.roundbg_1,borderRadius: BorderRadius.circular(100),),padding: EdgeInsets.all(10),margin: EdgeInsets.only(bottom: 6),width: 60,height: 60,child: Image.network('https://www.sj520.cn/sc/ima/weixin_sj520_11.jpg'),),Text('朋友圈',textAlign: TextAlign.center,style: TextStyle(color: Cor.black_1, fontSize: 14),)],),],),Gaps.vGap20,// 灰色横线Container(decoration: new BoxDecoration(color: Cor.roundbg_1),width: double.infinity,height: 10,),Gaps.vGap15,Row(mainAxisAlignment: MainAxisAlignment.spaceAround,children: [Text('已生成朋友圈图片',textAlign: TextAlign.center,style: TextStyle(color: Cor.black_1.withOpacity(0.65), fontSize: 14),),],),Gaps.vGap15,shareImage(),Gaps.vGap15,Gaps.vGap10,Row(mainAxisAlignment: MainAxisAlignment.spaceAround,children: [RaisedButton(color: Cor.blue_1,highlightColor: Colors.blue[100],colorBrightness: Brightness.dark,splashColor: Cor.blue_2,padding: EdgeInsets.only(left: 34,right: 34),child: Text("保存至相册",style: TextStyle(color: Colors.white, fontSize: 14),),shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20.0)),onPressed: () async {print('------');print(globalKey.currentContext);// createImageFromRepaintBoundary(globalKey);// final g = createImageFromWidget(saveImage());// print(g);saveImage(globalKey);},),],),Gaps.vGap25,Gaps.vGap25,]),),),);}
}

效果图

保存成功后可以在模拟器相册看到

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flutter 生成图片保存到手机相册

在pubspec.yaml文件添加插件

android和ios配置

ios 修改文件

android 修改文件

将需要生成图片的组件用RepaintBoundary包裹

保存图片到相册

完整demo代码

效果图

保存成功后可以在模拟器相册看到

公众号

flutter 生成图片保存到手机相册相关推荐

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