Ayush783

//app/build.gradle
dependencies {
    implementation 'com.google.firebase:firebase-ml-vision:24.1.0'
    implementation 'com.google.android.gms:play-services-mlkit-text-recognition:16.1.1'
    implementation 'com.google.mlkit:language-id:16.1.1'
    implementation 'com.google.mlkit:translate:16.1.1'
}

Ayush783

<application ...>
  ...
  <meta-data
      android:name="com.google.mlkit.vision.DEPENDENCIES"
      android:value="ocr" />
  <!-- To use multiple models: android:value="ocr,model2,model3" -->
</application>

Ayush783

class Capture {
  File image;
  final picker = ImagePicker(); //instantiate the image picker object

  Future<CapturedImage> getImage() async {
    final pickedFile =
        await picker.getImage(source: ImageSource.camera, imageQuality: 50); //capture the image

    if (pickedFile != null) {
      image = File(pickedFile.path);

Ayush783

class CapturedImage {
  final File image;
  final String error;

  CapturedImage(this.image, this.error);

  CapturedImage.fromFile(File file)
      : image = file,
        error = '';

Ayush783

...
dependencies:
  flutter:
    sdk: flutter
  ...
  firebase_ml_vision: ^0.9.8
  flutter_language_identification: ^0.1.0
  translator: ^0.1.5
...

Ayush783

const Map<String, dynamic> supportedLanguages = {
  'af': 'Afrikaans',
  'am': 'Amharic',
  ...
  ...
  ...
  'zh': 'Chinese',
  'zu': 'Zulu',
};

Ayush783

...
List<DropdownMenuItem<String>> languages = [
  for (int i = 0; i < supportedLanguages.length; i++)
    DropdownMenuItem<String>(
      child: Text(List.from(supportedLanguages.values)[i]),
      value: List.from(supportedLanguages.keys)[i],
    ),
];
...

Ayush783

...
//Initial State
class RecogniseTextInitial extends RecogniseTextState {}

//state emitted when text is being recognised
class RecognisingText extends RecogniseTextState {}

//final state when text has been recognised successfully
class RecognisedText extends RecogniseTextState {
  final String text, language, languageCode;

Ayush783

...
//Only one event to recognise text
class RecogniseText extends RecogniseTextEvent {
  final File image;

  RecogniseText(this.image);
}

Ayush783

class RecogniseTextBloc extends Bloc<RecogniseTextEvent, RecogniseTextState> {
  RecogniseTextBloc() : super(RecogniseTextInitial());

  MLKit mlKit = MLKit();

  @override
  Stream<RecogniseTextState> mapEventToState(
    RecogniseTextEvent event,
  ) async* {
    yield RecogniseTextInitial();