feat: add return image and refactor existing functions

Julian Steenbakker
Commit aa8298a78b88bfd46ebc02b5bdab680eb75a7f1a aa8298a7 1 parent 448f15a2
Showing 16 changed files with 612 additions and 273 deletions
android/build.gradle
android/src/main/kotlin/dev/steenbakker/mobile_scanner/MobileScanner.kt
example/ios/Runner.xcodeproj/project.pbxproj
example/lib/barcode_list_scanner_controller.dart
example/lib/barcode_scanner_controller.dart
example/lib/barcode_scanner_returning_image.dart
example/lib/barcode_scanner_without_controller.dart
example/lib/main.dart
lib/mobile_scanner.dart
lib/src/objects/barcode.dart → lib/src/barcode.dart
lib/src/barcode_capture.dart
lib/src/objects/barcode_utility.dart → lib/src/barcode_utility.dart
lib/src/mobile_scanner.dart
lib/src/mobile_scanner_controller.dart
lib/src/mobile_scanner_exception.dart
pubspec.yaml
--- a/android/build.gradle
View file @aa8298a
+++ b/android/build.gradle
View file @aa8298a
@@ -50,7 +50,7 @@ dependencies {
     // Use this dependency to bundle the model with your app
     implementation 'com.google.mlkit:barcode-scanning:17.0.2'
     // Use this dependency to use the dynamically downloaded model in Google Play Services
-//    implementation 'com.google.android.gms:play-services-mlkit-barcode-scanning:18.0.0'
+//    implementation 'com.google.android.gms:play-services-mlkit-barcode-scanning:18.1.0'
     implementation 'androidx.camera:camera-camera2:1.1.0'
     implementation 'androidx.camera:camera-lifecycle:1.1.0'
--- a/android/src/main/kotlin/dev/steenbakker/mobile_scanner/MobileScanner.kt
View file @aa8298a
+++ b/android/src/main/kotlin/dev/steenbakker/mobile_scanner/MobileScanner.kt
View file @aa8298a
@@ -3,7 +3,11 @@ package dev.steenbakker.mobile_scanner
 import android.Manifest
 import android.app.Activity
 import android.content.pm.PackageManager
+import android.graphics.ImageFormat
 import android.graphics.Point
+import android.graphics.Rect
+import android.graphics.YuvImage
+import android.media.Image
 import android.net.Uri
 import android.util.Log
 import android.util.Size
@@ -23,11 +27,13 @@ import io.flutter.plugin.common.MethodCall
 import io.flutter.plugin.common.MethodChannel
 import io.flutter.plugin.common.PluginRegistry
 import io.flutter.view.TextureRegistry
+import java.io.ByteArrayOutputStream
 import java.io.File
-class MobileScanner(private val activity: Activity, private val textureRegistry: TextureRegistry)
-    : MethodChannel.MethodCallHandler, EventChannel.StreamHandler, PluginRegistry.RequestPermissionsResultListener {
+class MobileScanner(private val activity: Activity, private val textureRegistry: TextureRegistry) :
+    MethodChannel.MethodCallHandler, EventChannel.StreamHandler,
+    PluginRegistry.RequestPermissionsResultListener {
     companion object {
         /**
          * When the application's activity is [androidx.fragment.app.FragmentActivity], requestCode can only use the lower 16 bits.
@@ -70,14 +76,22 @@ class MobileScanner(private val activity: Activity, private val textureRegistry:
         sink = null
     }
-    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray): Boolean {
+    override fun onRequestPermissionsResult(
+        requestCode: Int,
+        permissions: Array<out String>,
+        grantResults: IntArray
+    ): Boolean {
         return listener?.onRequestPermissionsResult(requestCode, permissions, grantResults) ?: false
     }
     private fun checkPermission(result: MethodChannel.Result) {
         // Can't get exact denied or not_determined state without request. Just return not_determined when state isn't authorized
         val state =
-                if (ContextCompat.checkSelfPermission(activity, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) 1
+            if (ContextCompat.checkSelfPermission(
+                    activity,
+                    Manifest.permission.CAMERA
+                ) == PackageManager.PERMISSION_GRANTED
+            ) 1
             else 0
         result.success(state)
     }
@@ -96,32 +110,83 @@ class MobileScanner(private val activity: Activity, private val textureRegistry:
         val permissions = arrayOf(Manifest.permission.CAMERA)
         ActivityCompat.requestPermissions(activity, permissions, REQUEST_CODE)
     }
-
+//    var lastScanned: List<Barcode>? = null
+//    var isAnalyzing: Boolean = false
     @ExperimentalGetImage
     val analyzer = ImageAnalysis.Analyzer { imageProxy -> // YUV_420_888 format
-//        when (analyzeMode) {
-//            AnalyzeMode.BARCODE -> {
+
         val mediaImage = imageProxy.image ?: return@Analyzer
         val inputImage = InputImage.fromMediaImage(mediaImage, imageProxy.imageInfo.rotationDegrees)
         scanner.process(inputImage)
             .addOnSuccessListener { barcodes ->
-                            for (barcode in barcodes) {
-                                val event = mapOf("name" to "barcode", "data" to barcode.data)
-                                sink?.success(event)
-                            }
-                        }
-                        .addOnFailureListener { e -> Log.e(TAG, e.message, e) }
-                        .addOnCompleteListener { imageProxy.close() }
+//                if (isAnalyzing) {
+//                    Log.d("scanner", "SKIPPING" )
+//                    return@addOnSuccessListener
+//                }
+//                isAnalyzing = true
+                val barcodeMap = barcodes.map { barcode -> barcode.data }
+                if (barcodeMap.isNotEmpty()) {
+                    sink?.success(mapOf(
+                        "name" to "barcode",
+                        "data" to barcodeMap,
+                        "image" to mediaImage.toByteArray()
+                    ))
+                }
+//                for (barcode in barcodes) {
+////                    if (lastScanned?.contains(barcodes.first) == true) continue;
+//                    if (lastScanned == null) {
+//                        lastScanned = barcodes
+//                    } else if (lastScanned!!.contains(barcode)) {
+//                        // Duplicate, don't send image
+//                        sink?.success(mapOf(
+//                            "name" to "barcode",
+//                            "data" to barcode.data,
+//                        ))
+//                    } else {
+//                        if (byteArray.isEmpty()) {
+//                            Log.d("scanner", "EMPTY" )
+//                            return@addOnSuccessListener
 //                        }
-//            else -> imageProxy.close()
+//
+//                        Log.d("scanner", "SCANNED IMAGE: $byteArray")
+//                        lastScanned = barcodes;
+//
+//
 //                    }
+//
+//                }
+//                isAnalyzing = false
             }
+            .addOnFailureListener { e -> sink?.success(mapOf(
+                "name" to "error",
+                "data" to e.localizedMessage
+            )) }
+            .addOnCompleteListener { imageProxy.close() }
+    }
+
+    private fun Image.toByteArray(): ByteArray {
+        val yBuffer = planes[0].buffer // Y
+        val vuBuffer = planes[2].buffer // VU
+
+        val ySize = yBuffer.remaining()
+        val vuSize = vuBuffer.remaining()
+
+        val nv21 = ByteArray(ySize + vuSize)
+        yBuffer.get(nv21, 0, ySize)
+        vuBuffer.get(nv21, ySize, vuSize)
+
+        val yuvImage = YuvImage(nv21, ImageFormat.NV21, this.width, this.height, null)
+        val out = ByteArrayOutputStream()
+        yuvImage.compressToJpeg(Rect(0, 0, yuvImage.width, yuvImage.height), 50, out)
+        return out.toByteArray()
+    }
     private var scanner = BarcodeScanning.getClient()
+
     @ExperimentalGetImage
     private fun start(call: MethodCall, result: MethodChannel.Result) {
         if (camera?.cameraInfo != null && preview != null && textureEntry != null) {
@@ -129,14 +194,23 @@ class MobileScanner(private val activity: Activity, private val textureRegistry:
             val portrait = camera!!.cameraInfo.sensorRotationDegrees % 180 == 0
             val width = resolution.width.toDouble()
             val height = resolution.height.toDouble()
-            val size = if (portrait) mapOf("width" to width, "height" to height) else mapOf("width" to height, "height" to width)
-            val answer = mapOf("textureId" to textureEntry!!.id(), "size" to size, "torchable" to camera!!.cameraInfo.hasFlashUnit())
+            val size = if (portrait) mapOf(
+                "width" to width,
+                "height" to height
+            ) else mapOf("width" to height, "height" to width)
+            val answer = mapOf(
+                "textureId" to textureEntry!!.id(),
+                "size" to size,
+                "torchable" to camera!!.cameraInfo.hasFlashUnit()
+            )
             result.success(answer)
         } else {
             val facing: Int = call.argument<Int>("facing") ?: 0
             val ratio: Int? = call.argument<Int>("ratio")
             val torch: Boolean = call.argument<Boolean>("torch") ?: false
             val formats: List<Int>? = call.argument<List<Int>>("formats")
+//            val analyzerWidth = call.argument<Int>("ratio")
+//            val analyzeRHEIG = call.argument<Int>("ratio")
             if (formats != null) {
                 val formatsList: MutableList<Int> = mutableListOf()
@@ -144,9 +218,17 @@ class MobileScanner(private val activity: Activity, private val textureRegistry:
                     formatsList.add(BarcodeFormats.values()[index].intValue)
                 }
                 scanner = if (formatsList.size == 1) {
-                    BarcodeScanning.getClient(BarcodeScannerOptions.Builder().setBarcodeFormats(formatsList.first()).build())
+                    BarcodeScanning.getClient(
+                        BarcodeScannerOptions.Builder().setBarcodeFormats(formatsList.first())
+                            .build()
+                    )
                 } else {
-                    BarcodeScanning.getClient(BarcodeScannerOptions.Builder().setBarcodeFormats(formatsList.first(), *formatsList.subList(1, formatsList.size).toIntArray()).build())
+                    BarcodeScanning.getClient(
+                        BarcodeScannerOptions.Builder().setBarcodeFormats(
+                            formatsList.first(),
+                            *formatsList.subList(1, formatsList.size).toIntArray()
+                        ).build()
+                    )
                 }
             }
@@ -168,7 +250,10 @@ class MobileScanner(private val activity: Activity, private val textureRegistry:
                 // Preview
                 val surfaceProvider = Preview.SurfaceProvider { request ->
                     val texture = textureEntry!!.surfaceTexture()
-                    texture.setDefaultBufferSize(request.resolution.width, request.resolution.height)
+                    texture.setDefaultBufferSize(
+                        request.resolution.width,
+                        request.resolution.height
+                    )
                     val surface = Surface(texture)
                     request.provideSurface(surface, executor) { }
                 }
@@ -186,12 +271,19 @@ class MobileScanner(private val activity: Activity, private val textureRegistry:
                 if (ratio != null) {
                     analysisBuilder.setTargetAspectRatio(ratio)
                 }
+//                analysisBuilder.setTargetResolution(Size(1440, 1920))
                 val analysis = analysisBuilder.build().apply { setAnalyzer(executor, analyzer) }
                 // Select the correct camera
-                val selector = if (facing == 0) CameraSelector.DEFAULT_FRONT_CAMERA else CameraSelector.DEFAULT_BACK_CAMERA
+                val selector =
+                    if (facing == 0) CameraSelector.DEFAULT_FRONT_CAMERA else CameraSelector.DEFAULT_BACK_CAMERA
-                camera = cameraProvider!!.bindToLifecycle(activity as LifecycleOwner, selector, preview, analysis)
+                camera = cameraProvider!!.bindToLifecycle(
+                    activity as LifecycleOwner,
+                    selector,
+                    preview,
+                    analysis
+                )
                 val analysisSize = analysis.resolutionInfo?.resolution ?: Size(0, 0)
                 val previewSize = preview!!.resolutionInfo?.resolution ?: Size(0, 0)
@@ -216,8 +308,15 @@ class MobileScanner(private val activity: Activity, private val textureRegistry:
                 val portrait = camera!!.cameraInfo.sensorRotationDegrees % 180 == 0
                 val width = resolution.width.toDouble()
                 val height = resolution.height.toDouble()
-                val size = if (portrait) mapOf("width" to width, "height" to height) else mapOf("width" to height, "height" to width)
-                val answer = mapOf("textureId" to textureEntry!!.id(), "size" to size, "torchable" to camera!!.cameraInfo.hasFlashUnit())
+                val size = if (portrait) mapOf(
+                    "width" to width,
+                    "height" to height
+                ) else mapOf("width" to height, "height" to width)
+                val answer = mapOf(
+                    "textureId" to textureEntry!!.id(),
+                    "size" to size,
+                    "torchable" to camera!!.cameraInfo.hasFlashUnit()
+                )
                 result.success(answer)
             }, executor)
         }
@@ -225,7 +324,7 @@ class MobileScanner(private val activity: Activity, private val textureRegistry:
     private fun toggleTorch(call: MethodCall, result: MethodChannel.Result) {
         if (camera == null) {
-            result.error(TAG,"Called toggleTorch() while stopped!", null)
+            result.error(TAG, "Called toggleTorch() while stopped!", null)
             return
         }
         camera!!.cameraControl.enableTorch(call.arguments == 1)
@@ -238,7 +337,7 @@ class MobileScanner(private val activity: Activity, private val textureRegistry:
 //    }
     private fun analyzeImage(call: MethodCall, result: MethodChannel.Result) {
-        val uri = Uri.fromFile( File(call.arguments.toString()))
+        val uri = Uri.fromFile(File(call.arguments.toString()))
         val inputImage = InputImage.fromFilePath(activity, uri)
         var barcodeFound = false
@@ -249,15 +348,17 @@ class MobileScanner(private val activity: Activity, private val textureRegistry:
                     sink?.success(mapOf("name" to "barcode", "data" to barcode.data))
                 }
             }
-            .addOnFailureListener { e -> Log.e(TAG, e.message, e)
-                result.error(TAG, e.message, e)}
+            .addOnFailureListener { e ->
+                Log.e(TAG, e.message, e)
+                result.error(TAG, e.message, e)
+            }
             .addOnCompleteListener { result.success(barcodeFound) }
     }
     private fun stop(result: MethodChannel.Result) {
         if (camera == null && preview == null) {
-            result.error(TAG,"Called stop() while already stopped!", null)
+            result.error(TAG, "Called stop() while already stopped!", null)
             return
         }
@@ -277,41 +378,54 @@ class MobileScanner(private val activity: Activity, private val textureRegistry:
     private val Barcode.data: Map<String, Any?>
-        get() = mapOf("corners" to cornerPoints?.map { corner -> corner.data }, "format" to format,
+        get() = mapOf(
+            "corners" to cornerPoints?.map { corner -> corner.data }, "format" to format,
             "rawBytes" to rawBytes, "rawValue" to rawValue, "type" to valueType,
             "calendarEvent" to calendarEvent?.data, "contactInfo" to contactInfo?.data,
             "driverLicense" to driverLicense?.data, "email" to email?.data,
             "geoPoint" to geoPoint?.data, "phone" to phone?.data, "sms" to sms?.data,
-                "url" to url?.data, "wifi" to wifi?.data, "displayValue" to displayValue)
+            "url" to url?.data, "wifi" to wifi?.data, "displayValue" to displayValue
+        )
     private val Point.data: Map<String, Double>
         get() = mapOf("x" to x.toDouble(), "y" to y.toDouble())
     private val Barcode.CalendarEvent.data: Map<String, Any?>
-        get() = mapOf("description" to description, "end" to end?.rawValue, "location" to location,
+        get() = mapOf(
+            "description" to description, "end" to end?.rawValue, "location" to location,
             "organizer" to organizer, "start" to start?.rawValue, "status" to status,
-                "summary" to summary)
+            "summary" to summary
+        )
     private val Barcode.ContactInfo.data: Map<String, Any?>
-        get() = mapOf("addresses" to addresses.map { address -> address.data },
+        get() = mapOf(
+            "addresses" to addresses.map { address -> address.data },
             "emails" to emails.map { email -> email.data }, "name" to name?.data,
             "organization" to organization, "phones" to phones.map { phone -> phone.data },
-                "title" to title, "urls" to urls)
+            "title" to title, "urls" to urls
+        )
     private val Barcode.Address.data: Map<String, Any?>
-        get() = mapOf("addressLines" to addressLines.map { addressLine -> addressLine.toString() }, "type" to type)
+        get() = mapOf(
+            "addressLines" to addressLines.map { addressLine -> addressLine.toString() },
+            "type" to type
+        )
     private val Barcode.PersonName.data: Map<String, Any?>
-        get() = mapOf("first" to first, "formattedName" to formattedName, "last" to last,
+        get() = mapOf(
+            "first" to first, "formattedName" to formattedName, "last" to last,
             "middle" to middle, "prefix" to prefix, "pronunciation" to pronunciation,
-                "suffix" to suffix)
+            "suffix" to suffix
+        )
     private val Barcode.DriverLicense.data: Map<String, Any?>
-        get() = mapOf("addressCity" to addressCity, "addressState" to addressState,
+        get() = mapOf(
+            "addressCity" to addressCity, "addressState" to addressState,
             "addressStreet" to addressStreet, "addressZip" to addressZip, "birthDate" to birthDate,
             "documentType" to documentType, "expiryDate" to expiryDate, "firstName" to firstName,
             "gender" to gender, "issueDate" to issueDate, "issuingCountry" to issuingCountry,
-                "lastName" to lastName, "licenseNumber" to licenseNumber, "middleName" to middleName)
+            "lastName" to lastName, "licenseNumber" to licenseNumber, "middleName" to middleName
+        )
     private val Barcode.Email.data: Map<String, Any?>
         get() = mapOf("address" to address, "body" to body, "subject" to subject, "type" to type)
--- a/example/ios/Runner.xcodeproj/project.pbxproj
View file @aa8298a
+++ b/example/ios/Runner.xcodeproj/project.pbxproj
View file @aa8298a
@@ -355,7 +355,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = RCH2VG82SH;
+				DEVELOPMENT_TEAM = 75Y2P2WSQQ;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = (
@@ -484,7 +484,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = RCH2VG82SH;
+				DEVELOPMENT_TEAM = 75Y2P2WSQQ;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = (
@@ -507,7 +507,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = RCH2VG82SH;
+				DEVELOPMENT_TEAM = 75Y2P2WSQQ;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
 				LD_RUNPATH_SEARCH_PATHS = (
--- a/example/lib/barcode_list_scanner_controller.dart 0 → 100644
View file @aa8298a
+++ b/example/lib/barcode_list_scanner_controller.dart 0 → 100644
View file @aa8298a
+import 'package:flutter/material.dart';
+import 'package:image_picker/image_picker.dart';
+import 'package:mobile_scanner/mobile_scanner.dart';
+
+class BarcodeListScannerWithController extends StatefulWidget {
+  const BarcodeListScannerWithController({Key? key}) : super(key: key);
+
+  @override
+  _BarcodeListScannerWithControllerState createState() =>
+      _BarcodeListScannerWithControllerState();
+}
+
+class _BarcodeListScannerWithControllerState
+    extends State<BarcodeListScannerWithController>
+    with SingleTickerProviderStateMixin {
+
+  BarcodeCapture? barcodeCapture;
+
+  MobileScannerController controller = MobileScannerController(
+    torchEnabled: true,
+    // formats: [BarcodeFormat.qrCode]
+    // facing: CameraFacing.front,
+  );
+
+  bool isStarted = true;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: Colors.black,
+      body: Builder(
+        builder: (context) {
+          return Stack(
+            children: [
+              MobileScanner(
+                controller: controller,
+                fit: BoxFit.contain,
+                // allowDuplicates: true,
+                // controller: MobileScannerController(
+                //   torchEnabled: true,
+                //   facing: CameraFacing.front,
+                // ),
+                onDetect: (barcodeCapture, arguments) {
+                  setState(() {
+                    this.barcodeCapture = barcodeCapture;
+                  });
+                },
+              ),
+              Align(
+                alignment: Alignment.bottomCenter,
+                child: Container(
+                  alignment: Alignment.bottomCenter,
+                  height: 100,
+                  color: Colors.black.withOpacity(0.4),
+                  child: Row(
+                    mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+                    children: [
+                      IconButton(
+                        color: Colors.white,
+                        icon: ValueListenableBuilder(
+                          valueListenable: controller.torchState,
+                          builder: (context, state, child) {
+                            if (state == null) {
+                              return const Icon(
+                                Icons.flash_off,
+                                color: Colors.grey,
+                              );
+                            }
+                            switch (state as TorchState) {
+                              case TorchState.off:
+                                return const Icon(
+                                  Icons.flash_off,
+                                  color: Colors.grey,
+                                );
+                              case TorchState.on:
+                                return const Icon(
+                                  Icons.flash_on,
+                                  color: Colors.yellow,
+                                );
+                            }
+                          },
+                        ),
+                        iconSize: 32.0,
+                        onPressed: () => controller.toggleTorch(),
+                      ),
+                      IconButton(
+                        color: Colors.white,
+                        icon: isStarted
+                            ? const Icon(Icons.stop)
+                            : const Icon(Icons.play_arrow),
+                        iconSize: 32.0,
+                        onPressed: () => setState(() {
+                          isStarted ? controller.stop() : controller.start();
+                          isStarted = !isStarted;
+                        }),
+                      ),
+                      Center(
+                        child: SizedBox(
+                          width: MediaQuery.of(context).size.width - 200,
+                          height: 50,
+                          child: FittedBox(
+                            child: Text(
+                              '${barcodeCapture?.barcodes.map((e) => e.rawValue)}',
+                              overflow: TextOverflow.fade,
+                              style: Theme.of(context)
+                                  .textTheme
+                                  .headline4!
+                                  .copyWith(color: Colors.white),
+                            ),
+                          ),
+                        ),
+                      ),
+                      IconButton(
+                        color: Colors.white,
+                        icon: ValueListenableBuilder(
+                          valueListenable: controller.cameraFacingState,
+                          builder: (context, state, child) {
+                            if (state == null) {
+                              return const Icon(Icons.camera_front);
+                            }
+                            switch (state as CameraFacing) {
+                              case CameraFacing.front:
+                                return const Icon(Icons.camera_front);
+                              case CameraFacing.back:
+                                return const Icon(Icons.camera_rear);
+                            }
+                          },
+                        ),
+                        iconSize: 32.0,
+                        onPressed: () => controller.switchCamera(),
+                      ),
+                      IconButton(
+                        color: Colors.white,
+                        icon: const Icon(Icons.image),
+                        iconSize: 32.0,
+                        onPressed: () async {
+                          final ImagePicker picker = ImagePicker();
+                          // Pick an image
+                          final XFile? image = await picker.pickImage(
+                            source: ImageSource.gallery,
+                          );
+                          if (image != null) {
+                            if (await controller.analyzeImage(image.path)) {
+                              if (!mounted) return;
+                              ScaffoldMessenger.of(context).showSnackBar(
+                                const SnackBar(
+                                  content: Text('Barcode found!'),
+                                  backgroundColor: Colors.green,
+                                ),
+                              );
+                            } else {
+                              if (!mounted) return;
+                              ScaffoldMessenger.of(context).showSnackBar(
+                                const SnackBar(
+                                  content: Text('No barcode found!'),
+                                  backgroundColor: Colors.red,
+                                ),
+                              );
+                            }
+                          }
+                        },
+                      ),
+                    ],
+                  ),
+                ),
+              ),
+            ],
+          );
+        },
+      ),
+    );
+  }
+}
--- a/example/lib/barcode_scanner_controller.dart
View file @aa8298a
+++ b/example/lib/barcode_scanner_controller.dart
View file @aa8298a
@@ -13,10 +13,12 @@ class BarcodeScannerWithController extends StatefulWidget {
 class _BarcodeScannerWithControllerState
     extends State<BarcodeScannerWithController>
     with SingleTickerProviderStateMixin {
-  String? barcode;
+
+  BarcodeCapture? barcode;
   MobileScannerController controller = MobileScannerController(
       torchEnabled: true,
+      detectionSpeed: DetectionSpeed.unrestricted
     // formats: [BarcodeFormat.qrCode]
     // facing: CameraFacing.front,
   );
@@ -41,7 +43,7 @@ class _BarcodeScannerWithControllerState
                 // ),
                 onDetect: (barcode, args) {
                   setState(() {
-                    this.barcode = barcode.rawValue;
+                    this.barcode = barcode;
                   });
                 },
               ),
@@ -99,7 +101,7 @@ class _BarcodeScannerWithControllerState
                           height: 50,
                           child: FittedBox(
                             child: Text(
-                              barcode ?? 'Scan something!',
+                              barcode?.barcodes.first.rawValue ?? 'Scan something!',
                               overflow: TextOverflow.fade,
                               style: Theme.of(context)
                                   .textTheme
--- a/example/lib/barcode_scanner_returning_image.dart
View file @aa8298a
+++ b/example/lib/barcode_scanner_returning_image.dart
View file @aa8298a
+import 'dart:math';
 import 'dart:typed_data';
 import 'package:flutter/material.dart';
@@ -14,11 +15,11 @@ class BarcodeScannerReturningImage extends StatefulWidget {
 class _BarcodeScannerReturningImageState
     extends State<BarcodeScannerReturningImage>
     with SingleTickerProviderStateMixin {
-  String? barcode;
-  Uint8List? image;
+  BarcodeCapture? barcode;
+  MobileScannerArguments? arguments;
   MobileScannerController controller = MobileScannerController(
-    torchEnabled: true,
+    // torchEnabled: true,
     returnImage: true,
     // formats: [BarcodeFormat.qrCode]
     // facing: CameraFacing.front,
@@ -26,13 +27,34 @@ class _BarcodeScannerReturningImageState
   bool isStarted = true;
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       backgroundColor: Colors.black,
       body: Builder(
         builder: (context) {
-          return Stack(
+          return Column(
+            children: [
+              Container(
+                color: Colors.blueGrey,
+                width: double.infinity,
+                height: 0.33 * MediaQuery.of(context).size.height,
+                child: barcode?.image != null
+                    ? Transform.rotate(
+                  angle: 90 * pi/180,
+                  child: Image(
+                    gaplessPlayback: true,
+                    image: MemoryImage(barcode!.image!),
+                    fit: BoxFit.contain,
+                  ),
+                )
+                    : Container(color: Colors.white, child: const Center(child: Text('Your scanned barcode will appear here!'))),
+              ),
+              Container(
+                height: 0.66 * MediaQuery.of(context).size.height,
+                color: Colors.grey,
+                child: Stack(
                   children: [
                     MobileScanner(
                       controller: controller,
@@ -42,17 +64,10 @@ class _BarcodeScannerReturningImageState
                       //   torchEnabled: true,
                       //   facing: CameraFacing.front,
                       // ),
-                onDetect: (barcode, args) {
+                      onDetect: (barcode, arguments) {
                         setState(() {
-                    this.barcode = barcode.rawValue;
-                    showDialog(
-                      context: context,
-                      builder: (context) => Image(
-                        image: MemoryImage(image!),
-                        fit: BoxFit.contain,
-                      ),
-                    );
-                    image = barcode.image;
+                          this.arguments = arguments;
+                          this.barcode = barcode;
                         });
                       },
                     ),
@@ -65,8 +80,10 @@ class _BarcodeScannerReturningImageState
                         child: Row(
                           mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                           children: [
-                      IconButton(
-                        color: Colors.white,
+                            Container(
+                              color: arguments != null && !arguments!.hasTorch ? Colors.red : Colors.white,
+                              child: IconButton(
+                                // color: ,
                                 icon: ValueListenableBuilder(
                                   valueListenable: controller.torchState,
                                   builder: (context, state, child) {
@@ -93,6 +110,7 @@ class _BarcodeScannerReturningImageState
                                 iconSize: 32.0,
                                 onPressed: () => controller.toggleTorch(),
                               ),
+                            ),
                             IconButton(
                               color: Colors.white,
                               icon: isStarted
@@ -110,7 +128,7 @@ class _BarcodeScannerReturningImageState
                                 height: 50,
                                 child: FittedBox(
                                   child: Text(
-                              barcode ?? 'Scan something!',
+                                    barcode?.barcodes.first.rawValue ?? 'Scan something!',
                                     overflow: TextOverflow.fade,
                                     style: Theme.of(context)
                                         .textTheme
@@ -139,21 +157,14 @@ class _BarcodeScannerReturningImageState
                               iconSize: 32.0,
                               onPressed: () => controller.switchCamera(),
                             ),
-                      SizedBox(
-                        width: 50,
-                        height: 50,
-                        child: image != null
-                            ? Image(
-                                image: MemoryImage(image!),
-                                fit: BoxFit.contain,
-                              )
-                            : Container(),
-                      ),
                           ],
                         ),
                       ),
                     ),
                   ],
+                ),
+              ),
+            ],
           );
         },
       ),
--- a/example/lib/barcode_scanner_without_controller.dart
View file @aa8298a
+++ b/example/lib/barcode_scanner_without_controller.dart
View file @aa8298a
@@ -12,7 +12,7 @@ class BarcodeScannerWithoutController extends StatefulWidget {
 class _BarcodeScannerWithoutControllerState
     extends State<BarcodeScannerWithoutController>
     with SingleTickerProviderStateMixin {
-  String? barcode;
+  BarcodeCapture? capture;
   @override
   Widget build(BuildContext context) {
@@ -25,9 +25,9 @@ class _BarcodeScannerWithoutControllerState
               MobileScanner(
                 fit: BoxFit.contain,
                 // allowDuplicates: false,
-                onDetect: (barcode, args) {
+                onDetect: (capture, arguments) {
                   setState(() {
-                    this.barcode = barcode.rawValue;
+                    this.capture = capture;
                   });
                 },
               ),
@@ -46,7 +46,7 @@ class _BarcodeScannerWithoutControllerState
                           height: 50,
                           child: FittedBox(
                             child: Text(
-                              barcode ?? 'Scan something!',
+                              capture?.barcodes.first.rawValue ?? 'Scan something!',
                               overflow: TextOverflow.fade,
                               style: Theme.of(context)
                                   .textTheme
--- a/example/lib/main.dart
View file @aa8298a
+++ b/example/lib/main.dart
View file @aa8298a
 import 'package:flutter/material.dart';
+import 'package:mobile_scanner_example/barcode_list_scanner_controller.dart';
 import 'package:mobile_scanner_example/barcode_scanner_controller.dart';
 import 'package:mobile_scanner_example/barcode_scanner_returning_image.dart';
 import 'package:mobile_scanner_example/barcode_scanner_without_controller.dart';
@@ -22,6 +23,16 @@ class MyHome extends StatelessWidget {
               onPressed: () {
                 Navigator.of(context).push(
                   MaterialPageRoute(
+                    builder: (context) => const BarcodeListScannerWithController(),
+                  ),
+                );
+              },
+              child: const Text('MobileScanner with List Controller'),
+            ),
+            ElevatedButton(
+              onPressed: () {
+                Navigator.of(context).push(
+                  MaterialPageRoute(
                     builder: (context) => const BarcodeScannerWithController(),
                   ),
                 );
--- a/lib/mobile_scanner.dart
View file @aa8298a
+++ b/lib/mobile_scanner.dart
View file @aa8298a
 library mobile_scanner;
+export 'src/barcode.dart';
+export 'src/barcode_capture.dart';
 export 'src/enums/camera_facing.dart';
 export 'src/enums/detection_speed.dart';
 export 'src/enums/mobile_scanner_state.dart';
@@ -8,4 +10,3 @@ export 'src/enums/torch_state.dart';
 export 'src/mobile_scanner.dart';
 export 'src/mobile_scanner_arguments.dart';
 export 'src/mobile_scanner_controller.dart';
-export 'src/objects/barcode.dart';
--- a/lib/src/objects/barcode.dart → lib/src/barcode.dart
View file @aa8298a
+++ b/lib/src/objects/barcode.dart → lib/src/barcode.dart
View file @aa8298a
 import 'dart:typed_data';
 import 'dart:ui';
-import 'package:mobile_scanner/src/objects/barcode_utility.dart';
+import 'package:mobile_scanner/src/barcode_utility.dart';
 /// Represents a single recognized barcode and its value.
 class Barcode {
@@ -97,7 +97,7 @@ class Barcode {
   });
   /// Create a [Barcode] from native data.
-  Barcode.fromNative(Map data, this.image)
+  Barcode.fromNative(Map data, {this.image})
       : corners = toCorners(data['corners'] as List?),
         format = toFormat(data['format'] as int),
         rawBytes = data['rawBytes'] as Uint8List?,
--- a/lib/src/barcode_capture.dart 0 → 100644
View file @aa8298a
+++ b/lib/src/barcode_capture.dart 0 → 100644
View file @aa8298a
+import 'dart:typed_data';
+
+import 'package:mobile_scanner/src/barcode.dart';
+
+class BarcodeCapture {
+  List<Barcode> barcodes;
+  Uint8List? image;
+
+  BarcodeCapture({
+    required this.barcodes,
+    this.image,
+  });
+
+}
--- a/lib/src/objects/barcode_utility.dart → lib/src/barcode_utility.dart
View file @aa8298a
+++ b/lib/src/objects/barcode_utility.dart → lib/src/barcode_utility.dart
View file @aa8298a
--- a/lib/src/mobile_scanner.dart
View file @aa8298a
+++ b/lib/src/mobile_scanner.dart
View file @aa8298a
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
-import 'package:mobile_scanner/mobile_scanner.dart';
+import 'package:mobile_scanner/src/mobile_scanner_arguments.dart';
+import 'package:mobile_scanner/src/mobile_scanner_controller.dart';
+import 'package:mobile_scanner/src/barcode_capture.dart';
 /// A widget showing a live camera preview.
 class MobileScanner extends StatefulWidget {
@@ -13,28 +15,24 @@ class MobileScanner extends StatefulWidget {
   /// Function that gets called when a Barcode is detected.
   ///
   /// [barcode] The barcode object with all information about the scanned code.
-  /// [args] Information about the state of the MobileScanner widget
-  final Function(Barcode barcode, MobileScannerArguments? args) onDetect;
-
-  /// TODO: Function that gets called when the Widget is initialized. Can be usefull
-  /// to check wether the device has a torch(flash) or not.
-  ///
-  /// [args] Information about the state of the MobileScanner widget
-  // final Function(MobileScannerArguments args)? onInitialize;
+  /// [startArguments] Information about the state of the MobileScanner widget
+  final Function(
+      BarcodeCapture capture, MobileScannerArguments? arguments)
+  onDetect;
   /// Handles how the widget should fit the screen.
   final BoxFit fit;
-  /// Set to false if you don't want duplicate scans.
-  final bool allowDuplicates;
+  /// Whether to automatically resume the camera when the application is resumed
+  final bool autoResume;
   /// Create a [MobileScanner] with a [controller], the [controller] must has been initialized.
   const MobileScanner({
     super.key,
     required this.onDetect,
     this.controller,
+    this.autoResume = true,
     this.fit = BoxFit.cover,
-    this.allowDuplicates = false,
     this.onPermissionSet,
   });
@@ -55,40 +53,35 @@ class _MobileScannerState extends State<MobileScanner>
     if (!controller.isStarting) controller.start();
   }
+  AppLifecycleState? _lastState;
+
   @override
   void didChangeAppLifecycleState(AppLifecycleState state) {
     switch (state) {
       case AppLifecycleState.resumed:
-        if (!controller.isStarting && controller.autoResume) controller.start();
+        if (!controller.isStarting && widget.autoResume && _lastState != AppLifecycleState.inactive) controller.start();
         break;
-      case AppLifecycleState.inactive:
       case AppLifecycleState.paused:
       case AppLifecycleState.detached:
         controller.stop();
         break;
+      default:
+        break;
     }
+    _lastState = state;
   }
-  Uint8List? lastScanned;
-
   @override
   Widget build(BuildContext context) {
     return ValueListenableBuilder(
-      valueListenable: controller.args,
+      valueListenable: controller.startArguments,
       builder: (context, value, child) {
         value = value as MobileScannerArguments?;
         if (value == null) {
           return const ColoredBox(color: Colors.black);
         } else {
           controller.barcodes.listen((barcode) {
-            if (!widget.allowDuplicates) {
-              if (lastScanned != barcode.rawBytes) {
-                lastScanned = barcode.rawBytes;
             widget.onDetect(barcode, value! as MobileScannerArguments);
-              }
-            } else {
-              widget.onDetect(barcode, value! as MobileScannerArguments);
-            }
           });
           return ClipRect(
             child: SizedBox(
--- a/lib/src/mobile_scanner_controller.dart
View file @aa8298a
+++ b/lib/src/mobile_scanner_controller.dart
View file @aa8298a
@@ -5,170 +5,155 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
 import 'package:mobile_scanner/mobile_scanner.dart';
-import 'package:mobile_scanner/src/objects/barcode_utility.dart';
+import 'package:mobile_scanner/src/barcode_capture.dart';
+import 'package:mobile_scanner/src/barcode_utility.dart';
+import 'package:mobile_scanner/src/mobile_scanner_exception.dart';
+/// The [MobileScannerController] holds all the logic of this plugin,
+/// where as the [MobileScanner] class is the frontend of this plugin.
 class MobileScannerController {
-  MethodChannel methodChannel =
-      const MethodChannel('dev.steenbakker.mobile_scanner/scanner/method');
-  EventChannel eventChannel =
-      const EventChannel('dev.steenbakker.mobile_scanner/scanner/event');
+  MobileScannerController({
+    this.facing = CameraFacing.back,
+    this.detectionSpeed = DetectionSpeed.noDuplicates,
+    // this.ratio,
+    this.torchEnabled = false,
+    this.formats,
+    // this.autoResume = true,
+    this.returnImage = false,
+    this.onPermissionSet,
+  }) {
+    // In case a new instance is created before calling dispose()
+    if (controllerHashcode != null) {
+      stop();
+    }
+    controllerHashcode = hashCode;
+    events = _eventChannel
+        .receiveBroadcastStream()
+        .listen((data) => _handleEvent(data as Map));
+  }
   //Must be static to keep the same value on new instances
-  static int? _controllerHashcode;
-  StreamSubscription? events;
+  static int? controllerHashcode;
-  Function(bool permissionGranted)? onPermissionSet;
-  final ValueNotifier<MobileScannerArguments?> args = ValueNotifier(null);
-  final ValueNotifier<TorchState> torchState = ValueNotifier(TorchState.off);
-  late final ValueNotifier<CameraFacing> cameraFacingState;
-  final Ratio? ratio;
-  final bool? torchEnabled;
-  // Whether to return the image buffer with the Barcode event
+  /// Select which camera should be used.
+  ///
+  /// Default: CameraFacing.back
+  final CameraFacing facing;
+
+  // /// Analyze the image in 4:3 or 16:9
+  // ///
+  // /// Only on Android
+  // final Ratio? ratio;
+
+  /// Enable or disable the torch (Flash) on start
+  ///
+  /// Default: disabled
+  final bool torchEnabled;
+
+  /// Set to true if you want to return the image buffer with the Barcode event
+  ///
+  /// Only supported on iOS and Android
   final bool returnImage;
-  /// If provided, the scanner will only detect those specific formats.
+  /// If provided, the scanner will only detect those specific formats
   final List<BarcodeFormat>? formats;
-  CameraFacing facing;
-  bool hasTorch = false;
-  late StreamController<Barcode> barcodesController;
-
-  /// Whether to automatically resume the camera when the application is resumed
-  bool autoResume;
+  /// Sets the speed of detections.
+  ///
+  /// WARNING: DetectionSpeed.unrestricted can cause memory issues on some devices
+  final DetectionSpeed detectionSpeed;
-  Stream<Barcode> get barcodes => barcodesController.stream;
+  /// Sets the barcode stream
+  final StreamController<BarcodeCapture> _barcodesController =
+  StreamController.broadcast();
+  Stream<BarcodeCapture> get barcodes => _barcodesController.stream;
-  MobileScannerController({
-    this.facing = CameraFacing.back,
-    this.ratio,
-    this.torchEnabled,
-    this.formats,
-    this.onPermissionSet,
-    this.autoResume = true,
-    this.returnImage = false,
-  }) {
-    // In case a new instance is created before calling dispose()
-    if (_controllerHashcode != null) {
-      stop();
-    }
-    _controllerHashcode = hashCode;
+  static const MethodChannel _methodChannel =
+  MethodChannel('dev.steenbakker.mobile_scanner/scanner/method');
+  static const EventChannel _eventChannel =
+  EventChannel('dev.steenbakker.mobile_scanner/scanner/event');
-    cameraFacingState = ValueNotifier(facing);
+  Function(bool permissionGranted)? onPermissionSet;
-    // Sets analyze mode and barcode stream
-    barcodesController = StreamController.broadcast(
-        // onListen: () => setAnalyzeMode(AnalyzeMode.barcode.index),
-        // onCancel: () => setAnalyzeMode(AnalyzeMode.none.index),
-        );
+  /// Listen to events from the platform specific code
+  late StreamSubscription events;
-    // Listen to events from the platform specific code
-    events = eventChannel
-        .receiveBroadcastStream()
-        .listen((data) => handleEvent(data as Map));
-  }
+  /// A notifier that provides several arguments about the MobileScanner
+  final ValueNotifier<MobileScannerArguments?> startArguments = ValueNotifier(null);
-  void handleEvent(Map event) {
-    final name = event['name'];
-    final data = event['data'];
-    final binaryData = event['binaryData'];
-    switch (name) {
-      case 'torchState':
-        final state = TorchState.values[data as int? ?? 0];
-        torchState.value = state;
-        break;
-      case 'barcode':
-        final image = returnImage ? event['image'] as Uint8List : null;
-        final barcode = Barcode.fromNative(data as Map? ?? {}, image);
-        barcodesController.add(barcode);
-        break;
-      case 'barcodeMac':
-        barcodesController.add(
-          Barcode(
-            rawValue: (data as Map)['payload'] as String?,
-          ),
-        );
-        break;
-      case 'barcodeWeb':
-        final bytes = (binaryData as List).cast<int>();
-        barcodesController.add(
-          Barcode(
-            rawValue: data as String?,
-            rawBytes: Uint8List.fromList(bytes),
-          ),
-        );
-        break;
-      default:
-        throw UnimplementedError();
-    }
-  }
+  /// A notifier that provides the state of the Torch (Flash)
+  final ValueNotifier<TorchState> torchState = ValueNotifier(TorchState.off);
-  // TODO: Add more analyzers like text analyzer
-  // void setAnalyzeMode(int mode) {
-  //   if (hashCode != _controllerHashcode) {
-  //     return;
-  //   }
-  //   methodChannel.invokeMethod('analyze', mode);
-  // }
+  /// A notifier that provides the state of which camera is being used
+  late final ValueNotifier<CameraFacing> cameraFacingState =
+  ValueNotifier(facing);
-  // List<BarcodeFormats>? formats = _defaultBarcodeFormats,
   bool isStarting = false;
+  bool? _hasTorch;
+
+  /// Set the starting arguments for the camera
+  Map<String, dynamic> _argumentsToMap({CameraFacing? cameraFacingOverride}) {
+    final Map<String, dynamic> arguments = {};
+
+    cameraFacingState.value = cameraFacingOverride ?? facing;
+    arguments['facing'] = cameraFacingState.value.index;
+
+    // if (ratio != null) arguments['ratio'] = ratio;
+    arguments['torch'] = torchEnabled;
+    arguments['speed'] = detectionSpeed.index;
+
+    if (formats != null) {
+      if (Platform.isAndroid) {
+        arguments['formats'] = formats!.map((e) => e.index).toList();
+      } else if (Platform.isIOS || Platform.isMacOS) {
+        arguments['formats'] = formats!.map((e) => e.rawValue).toList();
+      }
+    }
+    arguments['returnImage'] = true;
+    return arguments;
+  }
   /// Start barcode scanning. This will first check if the required permissions
   /// are set.
-  Future<void> start() async {
-    ensure('startAsync');
+  Future<MobileScannerArguments?> start({
+    CameraFacing? cameraFacingOverride,
+  }) async {
+    debugPrint('Hashcode controller: $hashCode');
     if (isStarting) {
-      throw Exception('mobile_scanner: Called start() while already starting.');
+      debugPrint("Called start() while starting.");
     }
     isStarting = true;
-    // setAnalyzeMode(AnalyzeMode.barcode.index);
     // Check authorization status
     if (!kIsWeb) {
-      MobileScannerState state = MobileScannerState
-          .values[await methodChannel.invokeMethod('state') as int? ?? 0];
+      final MobileScannerState state = MobileScannerState
+          .values[await _methodChannel.invokeMethod('state') as int? ?? 0];
       switch (state) {
         case MobileScannerState.undetermined:
           final bool result =
-              await methodChannel.invokeMethod('request') as bool? ?? false;
-          state = result
-              ? MobileScannerState.authorized
-              : MobileScannerState.denied;
+              await _methodChannel.invokeMethod('request') as bool? ?? false;
+          if (!result) {
+            isStarting = false;
             onPermissionSet?.call(result);
+            throw MobileScannerException('User declined camera permission.');
+          }
           break;
         case MobileScannerState.denied:
           isStarting = false;
           onPermissionSet?.call(false);
-          throw PlatformException(code: 'NO ACCESS');
+          throw MobileScannerException('User declined camera permission.');
         case MobileScannerState.authorized:
           onPermissionSet?.call(true);
           break;
       }
     }
-    cameraFacingState.value = facing;
-
-    // Set the starting arguments for the camera
-    final Map arguments = {};
-    arguments['facing'] = facing.index;
-    if (ratio != null) arguments['ratio'] = ratio;
-    if (torchEnabled != null) arguments['torch'] = torchEnabled;
-
-    if (formats != null) {
-      if (Platform.isAndroid) {
-        arguments['formats'] = formats!.map((e) => e.index).toList();
-      } else if (Platform.isIOS || Platform.isMacOS) {
-        arguments['formats'] = formats!.map((e) => e.rawValue).toList();
-      }
-    }
-    arguments['returnImage'] = returnImage;
-
     // Start the camera with arguments
     Map<String, dynamic>? startResult = {};
     try {
-      startResult = await methodChannel.invokeMapMethod<String, dynamic>(
+      startResult = await _methodChannel.invokeMapMethod<String, dynamic>(
         'start',
-        arguments,
+        _argumentsToMap(cameraFacingOverride: cameraFacingOverride),
       );
     } on PlatformException catch (error) {
       debugPrint('${error.code}: ${error.message}');
@@ -176,85 +161,76 @@ class MobileScannerController {
       if (error.code == "MobileScannerWeb") {
         onPermissionSet?.call(false);
       }
-      // setAnalyzeMode(AnalyzeMode.none.index);
-      return;
+      return null;
     }
     if (startResult == null) {
       isStarting = false;
-      throw PlatformException(code: 'INITIALIZATION ERROR');
+      throw MobileScannerException(
+          'Failed to start mobileScanner, no response from platform side');
     }
-    hasTorch = startResult['torchable'] as bool? ?? false;
+    _hasTorch = startResult['torchable'] as bool? ?? false;
+    if (_hasTorch! && torchEnabled) {
+      torchState.value = TorchState.on;
+    }
     if (kIsWeb) {
       onPermissionSet?.call(
         true,
       ); // If we reach this line, it means camera permission has been granted
-      args.value = MobileScannerArguments(
+      startArguments.value = MobileScannerArguments(
         webId: startResult['ViewID'] as String?,
         size: Size(
           startResult['videoWidth'] as double? ?? 0,
           startResult['videoHeight'] as double? ?? 0,
         ),
-        hasTorch: hasTorch,
+        hasTorch: _hasTorch!,
       );
     } else {
-      args.value = MobileScannerArguments(
+      startArguments.value = MobileScannerArguments(
         textureId: startResult['textureId'] as int?,
         size: toSize(startResult['size'] as Map? ?? {}),
-        hasTorch: hasTorch,
+        hasTorch: _hasTorch!,
       );
     }
-
     isStarting = false;
+    return startArguments.value!;
   }
+  /// Stops the camera, but does not dispose this controller.
   Future<void> stop() async {
-    try {
-      await methodChannel.invokeMethod('stop');
-    } on PlatformException catch (error) {
-      debugPrint('${error.code}: ${error.message}');
-    }
+    await _methodChannel.invokeMethod('stop');
   }
   /// Switches the torch on or off.
   ///
   /// Only works if torch is available.
   Future<void> toggleTorch() async {
-    ensure('toggleTorch');
-    if (!hasTorch) {
-      debugPrint('Device has no torch/flash.');
-      return;
+    if (_hasTorch == null) {
+      throw MobileScannerException(
+          'Cannot toggle torch if start() has never been called');
+    } else if (!_hasTorch!) {
+      throw MobileScannerException('Device has no torch');
     }
-    final TorchState state =
+    torchState.value =
     torchState.value == TorchState.off ? TorchState.on : TorchState.off;
-    try {
-      await methodChannel.invokeMethod('torch', state.index);
-    } on PlatformException catch (error) {
-      debugPrint('${error.code}: ${error.message}');
-    }
+    await _methodChannel.invokeMethod('torch', torchState.value.index);
   }
   /// Switches the torch on or off.
   ///
   /// Only works if torch is available.
   Future<void> switchCamera() async {
-    ensure('switchCamera');
-    try {
-      await methodChannel.invokeMethod('stop');
-    } on PlatformException catch (error) {
-      debugPrint(
-        '${error.code}: camera is stopped! Please start before switching camera.',
-      );
-      return;
-    }
-    facing =
-        facing == CameraFacing.back ? CameraFacing.front : CameraFacing.back;
-    await start();
+    await _methodChannel.invokeMethod('stop');
+    final CameraFacing facingToUse =
+    cameraFacingState.value == CameraFacing.back
+        ? CameraFacing.front
+        : CameraFacing.back;
+    await start(cameraFacingOverride: facingToUse);
   }
   /// Handles a local image file.
@@ -263,28 +239,66 @@ class MobileScannerController {
   ///
   /// [path] The path of the image on the devices
   Future<bool> analyzeImage(String path) async {
-    return methodChannel
+    return _methodChannel
         .invokeMethod<bool>('analyzeImage', path)
         .then<bool>((bool? value) => value ?? false);
   }
   /// Disposes the MobileScannerController and closes all listeners.
+  ///
+  /// If you call this, you cannot use this controller object anymore.
   void dispose() {
-    if (hashCode == _controllerHashcode) {
     stop();
-      events?.cancel();
-      events = null;
-      _controllerHashcode = null;
+    events.cancel();
+    _barcodesController.close();
+    if (hashCode == controllerHashcode) {
+      controllerHashcode = null;
       onPermissionSet = null;
     }
-    barcodesController.close();
   }
-  /// Checks if the MobileScannerController is bound to the correct MobileScanner object.
-  void ensure(String name) {
-    final message =
-        'MobileScannerController.$name called after MobileScannerController.dispose\n'
-        'MobileScannerController methods should not be used after calling dispose.';
-    assert(hashCode == _controllerHashcode, message);
+  /// Handles a returning event from the platform side
+  void _handleEvent(Map event) {
+    final name = event['name'];
+    final data = event['data'];
+
+    switch (name) {
+      case 'torchState':
+        final state = TorchState.values[data as int? ?? 0];
+        torchState.value = state;
+        break;
+      case 'barcode':
+        if (data == null) return;
+        final parsed = (data as List)
+            .map((value) => Barcode.fromNative(value as Map))
+            .toList();
+        _barcodesController.add(BarcodeCapture(
+          barcodes: parsed,
+          image: event['image'] as Uint8List,
+        ));
+        break;
+      case 'barcodeMac':
+        _barcodesController.add(
+          BarcodeCapture(
+            barcodes: [
+              Barcode(
+                rawValue: (data as Map)['payload'] as String?,
+              )
+            ],
+          ),
+        );
+        break;
+      case 'barcodeWeb':
+        _barcodesController.add(BarcodeCapture(barcodes: [
+          Barcode(
+            rawValue: data as String?,
+          )
+        ]));
+        break;
+      case 'error':
+        throw MobileScannerException(data as String);
+      default:
+        throw UnimplementedError(name as String?);
+    }
   }
 }
--- a/lib/src/mobile_scanner_exception.dart 0 → 100644
View file @aa8298a
+++ b/lib/src/mobile_scanner_exception.dart 0 → 100644
View file @aa8298a
+class MobileScannerException implements Exception {
+  String message;
+  MobileScannerException(this.message);
+}
--- a/pubspec.yaml
View file @aa8298a
+++ b/pubspec.yaml
View file @aa8298a
@@ -12,11 +12,13 @@ dependencies:
     sdk: flutter
   flutter_web_plugins:
     sdk: flutter
-  js: ^0.6.3
+  json_serializable: ^6.3.1
 dev_dependencies:
+  build_runner: ^2.2.0
   flutter_test:
     sdk: flutter
+  json_annotation: ^4.6.0
   lint: ^1.10.0
 flutter: