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Flutter read and resize Image

Flutter cps12345 11个月前 (10-27) 324次浏览 0个评论
问题:

Flutter 中如何从磁盘读取和改变 Image 大小?

解决方法:
 import 'dart:io' as Io;
    import 'package:image/image.dart';
    void main() {
      // Read a jpeg image from file.
      Image image = decodeImage(new Io.File('test.jpg').readAsBytesSync());

      // Resize the image to a 120x? thumbnail (maintaining the aspect ratio).
      Image thumbnail = copyResize(image, width: 120);

      // Save the thumbnail as a PNG.
      new Io.File('out/thumbnail-test.png')
            ..writeAsBytesSync(encodePng(thumbnail));
    }
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