aaa.dart

import 'dart:io';
import 'package:exif/exif.dart';
import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
import 'package:flutter_watermark/flutter_watermark.dart';
import 'package:http/http.dart' as http;

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  File _image;
  String _timestamp;
  String _location;

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

    Map<String, IfdTag> data = await readExifFromBytes(image.readAsBytesSync());
    IfdTag dateTime = data[ExifTags.DATE_TIME_ORIGINAL];
    _timestamp = dateTime.toString();

    IfdTag gpsInfo = data[ExifTags.GPS_INFO];
    _location = gpsInfo.toString();

    final watermarkedImage = await addWatermark(image);

    setState(() {
      _image = watermarkedImage;
    });

    var url = 'your_server_url';
    var response = await http.post(
      url,
      headers: {
        "Content-Type": "multipart/form-data",
      },
      body: {
        "image": _image,
      },
    );
    print(response.statusCode);
  }

  Future<File> addWatermark(File image) async {
    return await Watermark.image(
        image,
        position: WatermarkPosition.bottomRight,
        text: _timestamp + '\n' + _location,
        textStyle: TextStyle(
          fontWeight: FontWeight.bold,
          fontSize: 16,
          color: Colors.white,
        ));
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Add Watermark to Image'),
        ),
        body: Center(
          child: _image == null
              ? Text('No image selected.')
              : Image.file(_image),
        ),
        floatingActionButton: FloatingAction