flutter_ocr_identity_extractor 1.0.0

A Flutter package for extracting text from images using Google ML Kit Text Recognition. Supports multiple scripts and provides a simple API for OCR operations.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_ocr_identity_extractor/flutter_ocr_identity_extractor.dart';
import 'package:image_picker/image_picker.dart';
import 'dart:io';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'OCR Identity Extractor Example',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const OcrExamplePage(),
    );
  }
}

class OcrExamplePage extends StatefulWidget {
  const OcrExamplePage({super.key});

  @override
  State<OcrExamplePage> createState() => _OcrExamplePageState();
}

class _OcrExamplePageState extends State<OcrExamplePage> {
  String? _extractedText;
  bool _isProcessing = false;
  File? _selectedImage;

  Future<void> _pickAndExtractText() async {
    final picker = ImagePicker();
    final pickedFile = await picker.pickImage(source: ImageSource.gallery);

    if (pickedFile != null) {
      setState(() {
        _isProcessing = true;
        _extractedText = null;
        _selectedImage = File(pickedFile.path);
      });

      try {
        final text = await OcrService.instance.recognizeTextFromImage(
          _selectedImage!,
        );

        setState(() {
          _isProcessing = false;
          _extractedText = text;
        });

        if (text == null || text.isEmpty) {
          if (mounted) {
            ScaffoldMessenger.of(context).showSnackBar(
              const SnackBar(
                content: Text('No text found in the image'),
              ),
            );
          }
        }
      } catch (e) {
        setState(() {
          _isProcessing = false;
        });
        if (mounted) {
          ScaffoldMessenger.of(context).showSnackBar(
            SnackBar(
              content: Text('Error: $e'),
            ),
          );
        }
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: const Text('OCR Identity Extractor'),
      ),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            ElevatedButton.icon(
              onPressed: _isProcessing ? null : _pickAndExtractText,
              icon: const Icon(Icons.image),
              label: const Text('Pick Image and Extract Text'),
              style: ElevatedButton.styleFrom(
                padding: const EdgeInsets.symmetric(vertical: 16),
              ),
            ),
            const SizedBox(height: 20),
            if (_selectedImage != null) ...[
              Container(
                height: 200,
                decoration: BoxDecoration(
                  border: Border.all(color: Colors.grey),
                  borderRadius: BorderRadius.circular(8),
                ),
                child: ClipRRect(
                  borderRadius: BorderRadius.circular(8),
                  child: Image.file(
                    _selectedImage!,
                    fit: BoxFit.contain,
                  ),
                ),
              ),
              const SizedBox(height: 20),
            ],
            if (_isProcessing)
              const Center(
                child: Padding(
                  padding: EdgeInsets.all(20.0),
                  child: Column(
                    children: [
                      CircularProgressIndicator(),
                      SizedBox(height: 16),
                      Text('Processing image...'),
                    ],
                  ),
                ),
              )
            else if (_extractedText != null && _extractedText!.isNotEmpty)
              Card(
                child: Padding(
                  padding: const EdgeInsets.all(16.0),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      const Text(
                        'Extracted Text:',
                        style: TextStyle(
                          fontSize: 18,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                      const SizedBox(height: 12),
                      SelectableText(
                        _extractedText!,
                        style: const TextStyle(fontSize: 16),
                      ),
                    ],
                  ),
                ),
              )
            else if (_selectedImage != null)
              const Card(
                child: Padding(
                  padding: EdgeInsets.all(16.0),
                  child: Text('No text found in the image'),
                ),
              )
            else
              const Card(
                child: Padding(
                  padding: EdgeInsets.all(16.0),
                  child: Text('Please select an image to extract text'),
                ),
              ),
          ],
        ),
      ),
    );
  }

  @override
  void dispose() {
    OcrService.instance.dispose();
    super.dispose();
  }
}