recognizeImage method

@override Future<List<OcrResult>> recognizeImage(String imagePath)

从图片文件路径识别文字。

Implementation

@override
Future<List<OcrResult>> recognizeImage(String imagePath) async {
  _log('recognizeImage: imagePath="$imagePath"');
  _log('recognizeImage: path codeUnits=${imagePath.codeUnits}');

  try {
    final result = await _channel.invokeMethod<List<dynamic>>('recognizeImage', {
      'imagePath': imagePath,
    });
    _log('recognizeImage: native returned ${result?.length ?? 0} items');
    if (result == null) return [];
    return _parseResults(result);
  } on FormatException catch (e) {
    _log('recognizeImage: FormatException! offset=${e.offset} message=${e.message}');
    _log('recognizeImage: This usually means native code returned invalid UTF-8 bytes.');
    _log('recognizeImage: Check the native stderr log for hex dumps of the data.');
    rethrow;
  } on PlatformException catch (e) {
    _log('recognizeImage: PlatformException code=${e.code} message=${e.message} '
        'details=${e.details}');
    rethrow;
  } catch (e, st) {
    _log('recognizeImage: unexpected error', error: e, stackTrace: st);
    rethrow;
  }
}