forked from lxm_flutter/FlutterUnit
69 lines
2.0 KiB
Dart
69 lines
2.0 KiB
Dart
import 'dart:io';
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import 'dart:typed_data';
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import 'dart:ui';
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import 'package:flutter/cupertino.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter/rendering.dart';
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import 'package:path_provider/path_provider.dart';
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import 'dart:ui' as ui;
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import 'node1_base.dart';
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/// create by 张风捷特烈 on 2020/7/22
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/// contact me by email 1981462002@qq.com
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/// 说明:
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// {
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// "widgetId": 264,
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// "name": "保存Widget成为图片",
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// "priority": 2,
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// "subtitle": "通过RenderRepaintBoundary可以获取子组件的Image信息，从而获取字节保存为图片文件。",
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// }
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class RepaintBoundarySave extends StatelessWidget {
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final GlobalKey _globalKey = GlobalKey();
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@override
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Widget build(BuildContext context) {
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return Stack(
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children: [
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RepaintBoundary(
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key: _globalKey,
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child: TempPlayBezier3Page(),
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),
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Positioned(right: -10, child: _buildButton3(context))
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],
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);
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}
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Widget _buildButton3(context) => MaterialButton(
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child: Icon(
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Icons.save_alt,
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size: 15,
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color: Colors.white,
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),
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color: Colors.green,
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shape: CircleBorder(
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side: BorderSide(width: 2.0, color: Color(0xFFFFDFDFDF)),
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),
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onPressed: () async {
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var bits = await _widget2Image(_globalKey);
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var dir = await getApplicationSupportDirectory();
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var file = File(dir.path + "/save_img.png");
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var f = await file.writeAsBytes(bits);
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Scaffold.of(context).showSnackBar(SnackBar(
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backgroundColor: Theme.of(context).primaryColor,
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content: Text('保存成功后! 路径为:${f.path}'),
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));
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});
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Future<Uint8List> _widget2Image(GlobalKey key) async {
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RenderRepaintBoundary boundary = key.currentContext.findRenderObject();
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//获得 ui.image
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ui.Image img = await boundary.toImage();
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//获取图片字节
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var byteData = await img.toByteData(format: ui.ImageByteFormat.png);
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Uint8List bits = byteData.buffer.asUint8List();
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return bits;
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}
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}
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