Flutter实用工具插件br_utils的使用

当然，下面是一个关于如何在Flutter项目中使用br_utils插件的示例代码案例。br_utils是一个实用的工具插件，它可能包含多种实用功能，但由于具体插件的功能和API可能会随时间变化，以下代码将基于一个假设的br_utils插件功能进行示例，这些功能可能包括设备信息获取、屏幕截图、颜色转换等。

首先，确保你的pubspec.yaml文件中已经添加了br_utils依赖：

dependencies:
  flutter:
    sdk: flutter
  br_utils: ^latest_version  # 替换为实际的最新版本号

然后运行flutter pub get来安装依赖。

示例代码

1. 获取设备信息

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

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: DeviceInfoScreen(),
    );
  }
}

class DeviceInfoScreen extends StatefulWidget {
  @override
  _DeviceInfoScreenState createState() => _DeviceInfoScreenState();
}

class _DeviceInfoScreenState extends State<DeviceInfoScreen> {
  String deviceInfo = '';

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

  Future<void> _getDeviceInfo() async {
    try {
      var info = await BrUtils.getDeviceInfo();
      setState(() {
        deviceInfo = 'Brand: ${info.brand}\nModel: ${info.model}\nOS Version: ${info.osVersion}';
      });
    } catch (e) {
      deviceInfo = 'Error fetching device info: $e';
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Device Info'),
      ),
      body: Center(
        child: Text(deviceInfo),
      ),
    );
  }
}

2. 屏幕截图

import 'dart:ui' as ui;
import 'package:flutter/material.dart';
import 'package:br_utils/br_utils.dart';

class ScreenshotScreen extends StatefulWidget {
  @override
  _ScreenshotScreenState createState() => _ScreenshotScreenState();
}

class _ScreenshotScreenState extends State<ScreenshotScreen> {
  Uint8List? screenshotBytes;

  Future<void> _takeScreenshot() async {
    try {
      RenderRepaintBoundary boundary =
          globalKey.currentContext!.findRenderObject() as RenderRepaintBoundary;
      ui.Image image = await boundary.toImage();
      ByteData byteData = await image.toByteData(format: ui.ImageByteFormat.png);
      setState(() {
        screenshotBytes = byteData.buffer.asUint8List();
      });
    } catch (e) {
      print('Error taking screenshot: $e');
    }
  }

  final GlobalKey globalKey = GlobalKey();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Take Screenshot'),
      ),
      body: RepaintBoundary(
        key: globalKey,
        child: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              ElevatedButton(
                onPressed: _takeScreenshot,
                child: Text('Take Screenshot'),
              ),
              if (screenshotBytes != null)
                Image.memory(screenshotBytes!),
            ],
          ),
        ),
      ),
    );
  }
}

3. 颜色转换

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

class ColorConversionScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    Color originalColor = Colors.blue;
    Color hexColor = BrUtils.colorFromHex('#FF0000'); // 红色
    int hexValue = BrUtils.colorToHex(originalColor);

    return Scaffold(
      appBar: AppBar(
        title: Text('Color Conversion'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Container(
              width: 100,
              height: 100,
              color: originalColor,
              child: Center(Text('Original')),
            ),
            SizedBox(height: 20),
            Container(
              width: 100,
              height: 100,
              color: hexColor,
              child: Center(Text('From Hex')),
            ),
            SizedBox(height: 20),
            Text('Original Color Hex: $hexValue'),
          ],
        ),
      ),
    );
  }
}

总结

以上代码展示了如何在Flutter项目中使用br_utils插件来获取设备信息、截取屏幕截图以及进行颜色转换。请注意，实际使用时，你需要参考br_utils插件的官方文档来确认API的具体用法和参数。如果插件的功能与上述示例有所不同，请根据文档进行相应的调整。