Flutter开源库图片相关

flutter_image_compress

图片压缩工具

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// 1. compress file and get Uint8List
// 根据配置压缩图片
Future<Uint8List> testCompressFile(File file) async {
  var result = await FlutterImageCompress.compressWithFile(
    file.absolute.path,
    minWidth: 2300,
    minHeight: 1500,
    quality: 94,
    rotate: 90,
  );
  print(file.lengthSync());
  print(result.length);
  return result;
}

// 2. compress file and get file.
// 将图片压缩成新的图片
Future<File> testCompressAndGetFile(File file, String targetPath) async {
  var result = await FlutterImageCompress.compressAndGetFile(
      file.absolute.path, targetPath,
      quality: 88,
      rotate: 180,
    );

  print(file.lengthSync());
  print(result.lengthSync());

  return result;
}

// 3. compress asset and get Uint8List.
// 压缩asset的图片，返回Uint8List类型
Future<Uint8List> testCompressAsset(String assetName) async {
  var list = await FlutterImageCompress.compressAssetImage(
    assetName,
    minHeight: 1920,
    minWidth: 1080,
    quality: 96,
    rotate: 180,
  );

  return list;
}

// 4. compress Uint8List and get another Uint8List.
// 对Uint8List图片数据进行压缩
Future<Uint8List> testComporessList(Uint8List list) async {
  var result = await FlutterImageCompress.compressWithList(
    list,
    minHeight: 1920,
    minWidth: 1080,
    quality: 96,
    rotate: 135,
  );
  print(list.length);
  print(result.length);
  return result;
}


常用参数

  • rotate

需要旋转，可使用此参数

  • quality

图片质量，如果是png格式，在iOS端会被忽略

  • format

支持jpeg、png，默认是jpeg