platform_text_recognition 0.2.0

platform_text_recognition: ^0.2.0 copied to clipboard

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
import 'package:platform_text_recognition/platform_text_recognition.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Platform Text Recognition',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const OcrDemoPage(),
    );
  }
}

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

  @override
  State<OcrDemoPage> createState() => _OcrDemoPageState();
}

class _OcrDemoPageState extends State<OcrDemoPage> {
  final _picker = ImagePicker();
  String _recognizedText = 'Pick an image to recognize text.';
  bool _isLoading = false;
  TextRecognitionScript _script = TextRecognitionScript.latin;

  Future<void> _pickAndRecognize(ImageSource source) async {
    setState(() {
      _isLoading = true;
      _recognizedText = 'Recognizing...';
    });

    try {
      final image = await _picker.pickImage(source: source);
      if (image == null) {
        setState(() {
          _isLoading = false;
          _recognizedText = 'No image selected.';
        });
        return;
      }

      final text = await PlatformTextRecognizer.instance.recognizeText(
        image.path,
        script: _script,
      );

      if (!mounted) return;
      setState(() {
        _isLoading = false;
        _recognizedText = text.isEmpty ? 'No text detected.' : text;
      });
    } on PlatformException catch (error) {
      if (!mounted) return;
      setState(() {
        _isLoading = false;
        _recognizedText = 'Error: ${error.message ?? error.code}';
      });
    } catch (error) {
      if (!mounted) return;
      setState(() {
        _isLoading = false;
        _recognizedText = 'Error: $error';
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Platform Text Recognition'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            DropdownButtonFormField<TextRecognitionScript>(
              initialValue: _script,
              decoration: const InputDecoration(
                labelText: 'Script',
                border: OutlineInputBorder(),
              ),
              items: TextRecognitionScript.values
                  .map(
                    (script) => DropdownMenuItem(
                      value: script,
                      child: Text(script.name),
                    ),
                  )
                  .toList(),
              onChanged: _isLoading
                  ? null
                  : (script) {
                      if (script != null) {
                        setState(() => _script = script);
                      }
                    },
            ),
            const SizedBox(height: 16),
            FilledButton.icon(
              onPressed: _isLoading
                  ? null
                  : () => _pickAndRecognize(ImageSource.gallery),
              icon: const Icon(Icons.photo_library),
              label: const Text('Pick from gallery'),
            ),
            const SizedBox(height: 8),
            FilledButton.tonalIcon(
              onPressed: _isLoading
                  ? null
                  : () => _pickAndRecognize(ImageSource.camera),
              icon: const Icon(Icons.photo_camera),
              label: const Text('Take photo'),
            ),
            const SizedBox(height: 24),
            if (_isLoading) const LinearProgressIndicator(),
            Expanded(
              child: SingleChildScrollView(
                child: SelectableText(_recognizedText),
              ),
            ),
          ],
        ),
      ),
    );
  }
}