Flutter数据压缩插件native_minilzo的使用

Flutter数据压缩插件native_minilzo的使用

native_minilzo 是一个用于在 Flutter 中进行数据压缩的插件。它基于 MiniLZO 库实现，可以在 Dart 环境中高效地压缩和解压缩数据。

开始使用

步骤 1. 安装插件

请按照以下步骤安装 native_minilzo 插件：

  1. 在你的 pubspec.yaml 文件中添加依赖项:
    dependencies:
  native_minilzo: ^x.x.x
    其中 x.x.x 是具体的版本号，请根据实际情况选择合适的版本。
  2. 运行 flutter pub get 命令以获取并安装该插件。

步骤 2. 使用插件进行数据压缩和解压缩

压缩数据

你可以使用 compressData 方法来压缩数据。该方法接受两个参数：要压缩的数据和数据长度。

import 'package:native_minilzo/native_minilzo.dart';

final list = [0xa1,0x3f,0xe4,0x2b,0xd8,0x03,0x7c,0x56,0x90,0x45,0xe8,0xd3,0xf7,0x1d,0x62,0xb4,0x89,0x0e,0x71,0xc6,
                      0x42,0x19,0xa9,0x5d,0x28,0x3b,0x64,0xf0,0x9a,0x77,0xce,0x59,0x4d,0x23,0xda,0x15,0x83,0x00,0xe2,0x75,
                      0xb7,0x60,0xdd,0xf9,0x47,0x32,0x8c,0x24,0x1a,0xf4,0x7e,0x06,0x10,0x6f,0xc3,0x9d,0x51,0xa6,0x80,0xec,
                      0x39,0xb1,0x48,0xcf,0xdf,0xa0,0x2e,0x67,0x6d,0x20,0xc0,0x97,0x5b,0x40,0x86,0xf2,0x0d,0xad,0x3d,0x69,
                      0xdb,0x0a,0xfc,0x7d,0x26,0x9f,0x13,0x79,0x5f,0xe7,0x4a,0xc4,0xe1,0x49,0x09,0x99,0x2a,0x3e,0x53,0x88,
                      0x70,0x02,0xb2,0x84,0xa3,0xaa,0x35,0x30,0x37,0x3c,0xfd,0xd5,0x93,0x2d,0x5a,0xcc,0xba,0x95,0xa7,0x7a,
                      0xe9,0x8e,0x94,0x0f,0xe6,0xca,0x4e,0x2c,0xc9,0x7b,0x25,0x16,0xde,0x8b,0x29,0x0c,0x66,0x5c,0xd4,0xcb,
                      0x3a,0xa5,0xeb,0x6c,0x17,0xbd,0xdc,0x57,0xd0,0xed,0x43,0x12,0x8a,0xf8,0x61,0xa8,0x1e,0xbe,0x73,0x96,
                      0xfa,0x82,0x36,0xcd,0x34,0x46,0x41,0x6b,0x2f,0xea,0x9c,0x5e,0xbf,0xae,0xda,0x50,0x54,0xbb,0x63,0xf6,
                      0x8d,0x08,0xe5,0xff,0x4c,0xdc,0x22,0x27,0x33,0xac,0xaf,0x65,0x0b,0x9e,0x85,0x38,0xe3,0x11,0x76,0xc1];
final inData = Uint8List.fromList(list);

/// 样例代码：压缩数据
final afterCompressList = compressData(inData, inData.length);

解压缩数据

你可以使用 decompressData 方法来解压缩数据。该方法接受两个参数：要解压缩的数据和数据长度。

/// 样例代码：解压缩数据
final afterDeCompressList = decompressData(inData, inData.length);

完整示例代码

以下是完整的示例代码，展示了如何在 Flutter 应用程序中使用 native_minilzo 插件进行数据压缩和解压缩。

import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:native_minilzo/native_minilzo.dart';

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

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

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  [@override](/user/override)
  void initState() {
    super.initState();
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    const textStyle = TextStyle(fontSize: 25);
    const spacerSmall = SizedBox(height: 10);
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('MiniLzo on Dart'),
        ),
        body: SingleChildScrollView(
          child: Container(
            padding: const EdgeInsets.all(10),
            child: Column(
              children: [
                const Text(
                  'A Flutter plugin project for minilzo. '
                  'The native code is built as part of the Flutter Runner build.',
                  style: textStyle,
                  textAlign: TextAlign.center,
                ),
                spacerSmall,
                TextButton(
                  onPressed: () async {
                    final list = [0xa1,0x3f,0xe4,0x2b,0xd8,0x03,0x7c,0x56,0x90,0x45,0xe8,0xd3,0xf7,0x1d,0x62,0xb4,0x89,0x0e,0x71,0xc6,
                      0x42,0x19,0xa9,0x5d,0x28,0x3b,0x64,0xf0,0x9a,0x77,0xce,0x59,0x4d,0x23,0xda,0x15,0x83,0x00,0xe2,0x75,
                      0xb7,0x60,0xdd,0xf9,0x47,0x32,0x8c,0x24,0x1a,0xf4,0x7e,0x06,0x10,0x6f,0xc3,0x9d,0x51,0xa6,0x80,0xec,
                      0x39,0xb1,0x48,0xcf,0xdf,0xa0,0x2e,0x67,0x6d,0x20,0xc0,0x97,0x5b,0x40,0x86,0xf2,0x0d,0xad,0x3d,0x69,
                      0xdb,0x0a,0xfc,0x7d,0x26,0x9f,0x13,0x79,0x5f,0xe7,0x4a,0xc4,0xe1,0x49,0x09,0x99,0x2a,0x3e,0x53,0x88,
                      0x70,0x02,0xb2,0x84,0xa3,0xaa,0x35,0x30,0x37,0x3c,0xfd,0xd5,0x93,0x2d,0x5a,0xcc,0xba,0x95,0xa7,0x7a,
                      0xe9,0x8e,0x94,0x0f,0xe6,0xca,0x4e,0x2c,0xc9,0x7b,0x25,0x16,0xde,0x8b,0x29,0x0c,0x66,0x5c,0xd4,0xcb,
                      0x3a,0xa5,0xeb,0x6c,0x17,0xbd,0xdc,0x57,0xd0,0xed,0x43,0x12,0x8a,0xf8,0x61,0xa8,0x1e,0xbe,0x73,0x96,
                      0xfa,0x82,0x36,0xcd,0x34,0x46,0x41,0x6b,0x2f,0xea,0x9c,0x5e,0xbf,0xae,0xda,0x50,0x54,0xbb,0x63,0xf6,
                      0x8d,0x08,0xe5,0xff,0x4c,0xdc,0x22,0x27,0x33,0xac,0xaf,0x65,0x0b,0x9e,0x85,0x38,0xe3,0x11,0x76,0xc1];
                    final inData = Uint8List.fromList(list);

                    /// 压缩数据
                    final afterCompressList = await compressData(inData, inData.length);

                    /// 解压缩数据
                    final afterDeCompressList = await decompressData(inData, inData.length);

                    // 打印结果（可选）
                    print('After Compress: $afterCompressList');
                    print('After Decompress: $afterDeCompressList');
                  },
                  child: const Text('启用'),
                )
              ],
            ),
          ),
        ),
      ),
    );
  }
}

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更多关于Flutter数据压缩插件native_minilzo的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html


native_minilzo 是一个用于 Flutter 的插件，它提供了对 MiniLZO 压缩算法的支持，允许你在 Flutter 应用中压缩和解压缩数据。MiniLZO 是一个轻量级的压缩库，适用于需要快速压缩和解压缩数据的场景。

安装 native_minilzo 插件

首先，你需要在 pubspec.yaml 文件中添加 native_minilzo 插件的依赖：

dependencies:
  flutter:
    sdk: flutter
  native_minilzo: ^1.0.0

然后运行 flutter pub get 来安装插件。

使用 native_minilzo 插件

1. 压缩数据

你可以使用 NativeMiniLZO.compress 方法来压缩数据。该方法接受一个 Uint8List 类型的数据，并返回一个包含压缩数据的 Uint8List。

import 'package:flutter/material.dart';
import 'package:native_minilzo/native_minilzo.dart';
import 'dart:typed_data';

void compressData() async {
  String originalString = "This is a test string to compress.";
  Uint8List originalData = Uint8List.fromList(originalString.codeUnits);

  try {
    Uint8List compressedData = await NativeMiniLZO.compress(originalData);
    print("Compressed data: $compressedData");
  } catch (e) {
    print("Failed to compress data: $e");
  }
}

2. 解压缩数据

你可以使用 NativeMiniLZO.decompress 方法来解压缩数据。该方法接受一个 Uint8List 类型的压缩数据，并返回一个包含原始数据的 Uint8List。

void decompressData(Uint8List compressedData) async {
  try {
    Uint8List decompressedData = await NativeMiniLZO.decompress(compressedData);
    String originalString = String.fromCharCodes(decompressedData);
    print("Decompressed data: $originalString");
  } catch (e) {
    print("Failed to decompress data: $e");
  }
}

3. 完整示例

以下是一个完整的示例，展示了如何压缩和解压缩数据：

import 'package:flutter/material.dart';
import 'package:native_minilzo/native_minilzo.dart';
import 'dart:typed_data';

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('MiniLZO Example')),
        body: Center(
          child: ElevatedButton(
            onPressed: () async {
              String originalString = "This is a test string to compress.";
              Uint8List originalData = Uint8List.fromList(originalString.codeUnits);

              try {
                Uint8List compressedData = await NativeMiniLZO.compress(originalData);
                print("Compressed data: $compressedData");

                Uint8List decompressedData = await NativeMiniLZO.decompress(compressedData);
                String decompressedString = String.fromCharCodes(decompressedData);
                print("Decompressed data: $decompressedString");
              } catch (e) {
                print("Error: $e");
              }
            },
            child: Text('Compress and Decompress Data'),
          ),
        ),
      ),
    );
  }
}
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