RangeError：颤动图像压缩问题

Question

我正在使用flutter插件flutter_image_compress

下面是代码

File compressImage(File file)  {
    // Get file path
    // eg:- "Volume/VM/abcd.jpeg"
    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)}";

    File compressedFile;

    FlutterImageCompress.compressAndGetFile(
          filePath, 
          outPath,
          minWidth: 1000,
          minHeight: 1000,
          quality: 70).then((value) => compressedFile = value);

    return compressedFile;
}

这会返回以下错误

RangeError: Value not in range: -1

为什么会这样？

Answer 1

我认为问题与字符串有关。您需要确保您的文件名以 .jpg 或 .jpeg 结尾，而不是以 .png 或类似名称结尾。

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)}";