如何在颤动中将图库图像传递到另一个 Statefull 屏幕

Question

Here is my code:

Future getImage() async {
    var image = await ImagePicker.pickImage(source: ImageSource.gallery);

    setState(() {
      _image = image;
      print('Image Path $_image');
    });
  }

Answer 1

The image returned from ImagePicker.pickImage(...) is a File object that you can pass around to other widgets, just like you would with any other object. For example, consider this snippet, where NewPage takes a File image object as a parameter:

  Future<void> navigateOnImage() async {
    var image = await ImagePicker.pickImage(source: ImageSource.gallery);

    Navigator.of(context)
      .push(MaterialPageRoute(builder: (_) => NewPage(image)));
  }

Another option may be to convert the File object to a more handy object for your use case, such as a UInt8List object, with the File.readAsBytes method. Then you can pass that around just like in the example above.

Check out this flutter.dev article for more info on passing data when navigating.