扑朔迷离如何存储或保存相机和图库中的图像，以及每次显示新的空白页

如何解决扑朔迷离如何存储或保存相机和图库中的图像，以及每次显示新的空白页

我想创建或构建一个flutter应用程序，每次有新页面出现时，都要求用户从设备库或Camera上载图像，并在sqflite等中存储或保存。

请注意，每次应出现一个新的空白页面供用户上传新图像。用户应该第二次访问同一页面时，应该将其还原或以后再查看。

    class _SaveImageDemoSQLiteState extends State<SaveImageDemoSQLite> {
  //
  Future<File> imageFile;
  Image image;
  DBHelper dbHelper;
  List<Photo> images;

  @override
  void initState() {
    super.initState();
    images = [];
    dbHelper = DBHelper();
    refreshImages();

  }

  refreshImages() {
    dbHelper.getPhotos().then((imgs) {
      setState(() {
        images.clear();
        images.addAll(imgs);

      });
    });
  }



 pickImageFromGallery() {
    ImagePicker.pickImage(source: ImageSource.gallery).then((imgFile) {
      String imgString = Utility.base64String(imgFile.readAsBytesSync());
      Photo photo = Photo(0,imgString);
      dbHelper.save(photo);
      refreshImages();
    });


  }
  pickImageFromCamera() {
    ImagePicker.pickImage(source: ImageSource.camera).then((imgFile) {
      String imgString = Utility.base64String(imgFile.readAsBytesSync());
      Photo photo = Photo(0,imgString);
      dbHelper.save(photo);
      refreshImages();
    });
  }

  gridView() {
    return Padding(
      padding: EdgeInsets.all(5.0),child: GridView.count(
        crossAxisCount: 2,childAspectRatio: 1.0,mainAxisSpacing: 4.0,crossAxisSpacing: 4.0,children: images.map((photo) {
          return Utility.imageFromBase64String(photo.photo_name);
        }).toList(),),);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),actions: <Widget>[
          IconButton(
            icon: Icon(Icons.add_a_photo),onPressed: () {
              pickImageFromGallery();
            },IconButton(
            icon: Icon(Icons.photo_camera),onPressed: () {
              pickImageFromCamera()();
            },)
        ],body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.start,children: <Widget>[
            Flexible(
              child: gridView(),)
          ],);
  }


}