Flutter屏幕内容捕获插件capture_widget的使用

Flutter屏幕内容捕获插件capture_widget的使用

获取开始

此项目是一个新的Flutter插件项目。它是一个专门的包，包括针对Android和/或iOS的平台特定实现代码。

对于如何开始Flutter开发的帮助，请查看官方文档，其中提供了教程、示例、移动开发指南以及完整的API参考。

示例代码

import 'dart:math' as math;

import 'package:flutter/material.dart';
import 'package:capture_widget/capture_widget.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final _captureService = CaptureService.instance;
  Image? image;

  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('插件示例应用'),
        ),
        body: image != null ? Center(child: image) : SingleChildScrollView(
          child: CaptureWidget(overRepaintKey: _captureService.globalKey, child: Column(
              children: List.generate(
                30,
                (i) => Container(
                      color: Color((math.Random().nextDouble() * 0xFFFFFF).toInt()).withOpacity(1.0),
                      height: 100,
                    ),
              ),
            ),
          ),
        ),
        floatingActionButton: image == null
            ? FloatingActionButton(
                child: const Icon(Icons.camera),
                onPressed: () async {
                  // 捕获屏幕内容
                  final captureImage = await _captureService.captureImage();
                  if (captureImage == null) return;
                  // 更新UI以显示捕获的图像
                  setState(() => image = Image.memory(captureImage));
                },
              )
            : FloatingActionButton(
                onPressed: () => setState(() => image = null),
                child: const Icon(Icons.remove),
              ),
      ),
    );
  }
}

完整示例Demo

上述代码展示了如何使用capture_widget插件来捕获屏幕内容，并将其显示在应用中。具体步骤如下：

1. 导入必要的库：

   import 'dart:math' as math;
   import 'package:flutter/material.dart';
   import 'package:capture_widget/capture_widget.dart';
   

2. 创建主应用类：

   void main() {
     runApp(const MyApp());
   }
   

3. 定义状态管理类：

   class _MyAppState extends State<MyApp> {
     final _captureService = CaptureService.instance;
     Image? image;
   
     @override
     void initState() {
       super.initState();
     }
   
     @override
     Widget build(BuildContext context) {
       return MaterialApp(
         home: Scaffold(
           appBar: AppBar(
             title: const Text('插件示例应用'),
           ),
           body: image != null ? Center(child: image) : SingleChildScrollView(
             child: CaptureWidget(overRepaintKey: _captureService.globalKey, child: Column(
               children: List.generate(
                 30,
                 (i) => Container(
                       color: Color((math.Random().nextDouble() * 0xFFFFFF).toInt()).withOpacity(1.0),
                       height: 100,
                     ),
               ),
             ),
           ),
         ),
           floatingActionButton: image == null
               ? FloatingActionButton(
                   child: const Icon(Icons.camera),
                   onPressed: () async {
                     // 捕获屏幕内容
                     final captureImage = await _captureService.captureImage();
                     if (captureImage == null) return;
                     // 更新UI以显示捕获的图像
                     setState(() => image = Image.memory(captureImage));
                   },
                 )
               : FloatingActionButton(
                   onPressed: () => setState(() => image = null),
                   child: const Icon(Icons.remove),
                 ),
         ),
       );
     }
   }