learning_text_recognition 0.0.1
learning_text_recognition: ^0.0.1 copied to clipboard
The easy way to use ML Kit for text recognition in Flutter.
import 'package:flutter/material.dart';
import 'package:learning_input_image/learning_input_image.dart';
import 'package:learning_text_recognition/learning_text_recognition.dart';
import 'package:provider/provider.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
theme: ThemeData(
primarySwatch: Colors.lightBlue,
visualDensity: VisualDensity.adaptivePlatformDensity,
primaryTextTheme: TextTheme(
headline6: TextStyle(color: Colors.white),
),
),
home: ChangeNotifierProvider(
create: (_) => TextRecognitionState(),
child: TextRecognitionPage(),
),
);
}
}
class TextRecognitionPage extends StatefulWidget {
@override
_TextRecognitionPageState createState() => _TextRecognitionPageState();
}
class _TextRecognitionPageState extends State<TextRecognitionPage> {
TextRecognition? _textRecognition = TextRecognition();
@override
void dispose() {
_textRecognition?.dispose();
super.dispose();
}
Future<void> _startRecognition(InputImage image) async {
TextRecognitionState state =
Provider.of<TextRecognitionState>(context, listen: false);
if (state.isNotProcessing) {
state.startProcessing();
state.image = image;
state.data = await _textRecognition?.process(image);
state.stopProcessing();
}
}
@override
Widget build(BuildContext context) {
return InputCameraView(
mode: InputCameraMode.gallery,
title: 'Text Recognition',
onImage: _startRecognition,
overlay: Consumer<TextRecognitionState>(
builder: (_, state, __) {
if (state.isNotEmpty) {
return Center(
child: Container(
padding: EdgeInsets.symmetric(vertical: 10, horizontal: 16),
decoration: BoxDecoration(
color: Colors.white.withOpacity(0.8),
borderRadius: BorderRadius.all(Radius.circular(4.0)),
),
child: Text(
state.text,
style: TextStyle(
fontWeight: FontWeight.w500,
),
),
),
);
}
return Container();
},
),
);
}
}
class TextRecognitionState extends ChangeNotifier {
InputImage? _image;
RecognizedText? _data;
bool _isProcessing = false;
InputImage? get image => _image;
RecognizedText? get data => _data;
String get text => _data!.text;
bool get isNotProcessing => !_isProcessing;
bool get isNotEmpty => _data != null && text.isNotEmpty;
void startProcessing() {
_isProcessing = true;
notifyListeners();
}
void stopProcessing() {
_isProcessing = false;
notifyListeners();
}
set image(InputImage? image) {
_image = image;
notifyListeners();
}
set data(RecognizedText? data) {
_data = data;
notifyListeners();
}
}