无法在颤振上压缩文件

Question

我想在使用文件选择器检索文件之前压缩文件大小。然后我尝试压缩文件，这就是发生的事情

文件选择器

压缩 1

使用 flutter_image_compress

 Future<File> compressFile() async {
    try{
      //PlatformFile file = _paths.first;
      File file = File(_fileName);
      final filePath = file.absolute.path;
      // Create output file path
      // eg:- "Volume/VM/abcd_out.jpeg"

      final lastIndex = filePath.lastIndexOf(new RegExp(r'.jp'));
      final splitted = filePath.substring(0, (lastIndex));
      final outPath = "${splitted}_out${filePath.substring(lastIndex)}";
      var result = await FlutterImageCompress.compressAndGetFile(
        file.absolute.path, outPath,
        quality: 5,
      );
      print(file.lengthSync());
      print(result.lengthSync());
      return result;
    }
    catch(e){
      var snackBar = SnackBar(content: Text('$e'),
        backgroundColor: Colors.red,);
      _scaffoldKey.currentState.showSnackBar(snackBar);
      print('$e');
    }

  }

结果

压缩 2

 compressingPhoto() async {
    try{
      final tDirectory = await getTemporaryDirectory();
      final path = tDirectory.path;
      //final path = tDirectory.path;

      // PlatformFile _paths;
      // File file = File(_paths.path);


      File file = File(_fileName);
      ImD.Image mImageFile = ImD.decodeImage(file.readAsBytesSync());
      final compressedImageFile =
      File('$path/img_$_fileName.jpg')..writeAsBytesSync(ImD.encodeJpg(mImageFile,
          quality: 80));
      setState(() {
        file = compressedImageFile;
        print(file.lengthSync);
      });
    }
    catch(e){
      var snackBar = SnackBar(content: Text('$e'),
        backgroundColor: Colors.red,);
      _scaffoldKey.currentState.showSnackBar(snackBar);
      print('$e');
    }