Question 76239 in Flutter Question posted in
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This expression has a type of 'void' so its value can't be used in a set state – Flutter

To have a better view this is the Image


  void _addImage(c) async {
    final ImagePicker picker = ImagePicker();
    final XFile? image = await picker.pickImage(source: ImageSource.gallery);
    print(image?.path);
    print(_imagePath?.split('/').last);
    if (image != null) {
      setState(() {
        String _imagePath = attachments.add(image.path);
      });
    }
  }
}

It was invalid, it was to render image uploaded name.

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3

Answers


  1. Chosen as BEST ANSWER
    0

    **

    This worked out

    **

    Future<void> _addImage() async {
    final ImagePicker picker = ImagePicker();
    final XFile? image = await picker.pickImage(source: ImageSource.gallery);
    print(image?.path);
    if (image != null) {
      setState(() {
        String _imagePath = image!.path;
        attachments.add(_imagePath);
        imageName = [_imagePath.split('/').last];
        print(_imagePath.split('/').last);
      });
    }
  }

  2. 0

    Your code should be like..

    Future<void> _addImage(c) async {
    final ImagePicker picker = ImagePicker();
    final XFile? image = await picker.pickImage(source: ImageSource.gallery);
    print(image?.path);
    print(_imagePath?.split('/').last);
    if (image != null) {
      setState(() {
        String _imagePath =  image!.path;
        attachments.add(_imagePath);
      });
    }
  }
}
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  3. 0

    You should write it like this:

    Future<void> _addImage(c) async {
    final ImagePicker picker = ImagePicker();
    final XFile? image = await picker.pickImage(source: ImageSource.gallery);
    print(image?.path);
    print(_imagePath?.split('/').last);
    if (image != null) {
      setState(() {
        attachments.add(image!.path); 
        //removed _imagePath variable because it was being used just to carry
        //the value of image!.path 
        //if you want to use it as a global variable please define it outside
        //the function scope
        // String imagePath = "";
        // _addImage(c){setState((){imagePath = image!.path;});}
      });
    }
  }
}

    Couple of things I noticed in this function:

    1. c parameter is never used
    2. _imagePath?.split('/').last could break depending upon what OS you run it on
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