adjust analyze image to throw barcode exceptions if needed

@@ -29,7 +29,7 @@ class MobileScannerHandler(
 
 
     private val analyzeImageErrorCallback: AnalyzerErrorCallback = {
     private val analyzeImageErrorCallback: AnalyzerErrorCallback = {
         Handler(Looper.getMainLooper()).post {
         Handler(Looper.getMainLooper()).post {
-            analyzerResult?.error(MobileScannerErrorCodes.GENERIC_ERROR, it, null)
+            analyzerResult?.error(MobileScannerErrorCodes.BARCODE_ERROR, it, null)
             analyzerResult = null
             analyzerResult = null
         }
         }
     }
     }

@@ -269,7 +269,7 @@ public class MobileScannerPlugin: NSObject, FlutterPlugin {
                                    barcodeScannerOptions: scannerOptions, callback: { barcodes, error in
                                    barcodeScannerOptions: scannerOptions, callback: { barcodes, error in
             if error != nil {
             if error != nil {
                 DispatchQueue.main.async {
                 DispatchQueue.main.async {
-                    result(FlutterError(code: MobileScannerErrorCodes.GENERIC_ERROR,
+                    result(FlutterError(code: MobileScannerErrorCodes.BARCODE_ERROR,
                                         message: error?.localizedDescription,
                                         message: error?.localizedDescription,
                                         details: nil))
                                         details: nil))
                 }
                 }

@@ -164,6 +164,7 @@ class MethodChannelMobileScanner extends MobileScannerPlatform {
     String path, {
     String path, {
     List<BarcodeFormat> formats = const <BarcodeFormat>[],
     List<BarcodeFormat> formats = const <BarcodeFormat>[],
   }) async {
   }) async {
+    try {
       final Map<Object?, Object?>? result =
       final Map<Object?, Object?>? result =
           await methodChannel.invokeMapMethod<Object?, Object?>(
           await methodChannel.invokeMapMethod<Object?, Object?>(
         'analyzeImage',
         'analyzeImage',
@@ -179,6 +180,14 @@ class MethodChannelMobileScanner extends MobileScannerPlatform {
       );
       );
 
 
       return _parseBarcode(result);
       return _parseBarcode(result);
+    } on PlatformException catch (error) {
+      // Handle any errors from analyze image requests.
+      if (error.code == kBarcodeErrorEventName) {
+        throw MobileScannerBarcodeException(error.message);
+      }
+
+      return null;
+    }
   }
   }
 
 
   @override
   @override

@@ -191,6 +191,9 @@ class MobileScannerController extends ValueNotifier<MobileScannerState> {
   /// This is only supported on Android, iOS and MacOS.
   /// This is only supported on Android, iOS and MacOS.
   ///
   ///
   /// Returns the [BarcodeCapture] that was found in the image.
   /// Returns the [BarcodeCapture] that was found in the image.
+  ///
+  /// If an error occurred during the analysis of the image,
+  /// a [MobileScannerBarcodeException] error is thrown.
   Future<BarcodeCapture?> analyzeImage(String path) {
   Future<BarcodeCapture?> analyzeImage(String path) {
     return MobileScannerPlatform.instance.analyzeImage(path);
     return MobileScannerPlatform.instance.analyzeImage(path);
   }
   }