ImageProcess/native_vision/example/lib/doc_clean_page.dart

import 'dart:io';

import 'package:flutter/material.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:gallery_saver/gallery_saver.dart';
import 'package:native_vision/native/native_vision.dart';

import 'loading_overlay.dart';

class DocCleanPage extends StatefulWidget {
  final String imgPath;
  const DocCleanPage({Key? key, required this.imgPath}) : super(key: key);

  @override
  State<StatefulWidget> createState() {
    return DocCleanPageState();
  }
}

class DocCleanPageState extends State<DocCleanPage> {
  String? cleanedImgPath;

  void cleanImage(String imgPath) async {
    LoadingOverlay.of(context).show();
    int docFilterPtr = await DocCleanFilter.init();
    final cleanedImgPath = await DocCleanFilter.process(imgPath, docFilterPtr);
    await DocCleanFilter.release(docFilterPtr);
    if (!mounted) return;
    setState(() {
      this.cleanedImgPath = cleanedImgPath;
    });
    LoadingOverlay.of(context).hide();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: const Text("文档增强"), actions: [
          TextButton(
            onPressed: () async {
              if (cleanedImgPath == null) {
                Fluttertoast.showToast(msg: "请先做增强处理");
                return;
              }
              final succ = await GallerySaver.saveImage(cleanedImgPath!);
              Fluttertoast.showToast(msg: succ != null && succ ? "成功" : "失败");
            },
            child: const Text('保存',
                style: TextStyle(
                  fontSize: 18,
                  color: Colors.white,
                )),
          ),
        ]),
        body: Stack(fit: StackFit.expand, children: [
          Image.file(File(cleanedImgPath ?? widget.imgPath)),
          Positioned(
            bottom: 20,
            left: 0,
            right: 0,
            child: Center(
              child: FloatingActionButton(
                child: const Icon(Icons.check),
                onPressed: () {
                  cleanImage(widget.imgPath);
                },
              ),
            ),
          )
        ]));
  }
}