Updated allowedFormats method.

android/src/main/kotlin/net/touchcapture/qr/flutterqr/FlutterQrPlugin.kt

@@ -7,7 +7,6 @@ import io.flutter.embedding.engine.plugins.FlutterPlugin
 import io.flutter.embedding.engine.plugins.activity.ActivityAware
 import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
 import io.flutter.plugin.common.BinaryMessenger
-import io.flutter.plugin.common.MethodChannel
 import io.flutter.plugin.common.PluginRegistry
 import io.flutter.plugin.platform.PlatformViewRegistry
 

android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRView.kt

@@ -3,7 +3,6 @@ package net.touchcapture.qr.flutterqr
 import android.Manifest
 import android.app.Activity
 import android.app.Application
-import android.content.Context
 import android.content.pm.PackageManager
 import android.os.Bundle
 import android.view.View
@@ -18,27 +17,12 @@ import io.flutter.plugin.common.BinaryMessenger
 import io.flutter.plugin.common.MethodCall
 import io.flutter.plugin.common.MethodChannel
 import io.flutter.plugin.platform.PlatformView
-class QRView(messenger: BinaryMessenger, id: Int, private val context: Context, private val params: HashMap<String, Any>) :
+class QRView(messenger: BinaryMessenger, id: Int, private val params: HashMap<String, Any>) :
         PlatformView, MethodChannel.MethodCallHandler {
 
     private var isTorchOn: Boolean = false
     private var barcodeView: BarcodeView? = null
     private val channel: MethodChannel
-    var allowedBarcodeTypes = mutableListOf<BarcodeFormat>()
-
-    private val qrCodeTypes = mapOf(
-            0 to BarcodeFormat.AZTEC,
-            1 to BarcodeFormat.CODE_128,
-            2 to BarcodeFormat.CODE_39,
-            3 to BarcodeFormat.CODE_93,
-            4 to BarcodeFormat.DATA_MATRIX,
-            5 to BarcodeFormat.EAN_13,
-            6 to BarcodeFormat.EAN_8,
-            7 to BarcodeFormat.ITF,
-            8 to BarcodeFormat.PDF_417,
-            9 to BarcodeFormat.QR_CODE,
-            10 to BarcodeFormat.UPC_E
-    )
 
     init {
         checkAndRequestPermission(null)
@@ -81,7 +65,7 @@ class QRView(messenger: BinaryMessenger, id: Int, private val context: Context,
 
     override fun onMethodCall(call: MethodCall, result: MethodChannel.Result) {
         when(call.method) {
-            "startScan" -> startScan()
+            "startScan" -> startScan(call.arguments as? List<Int>, result)
             "stopScan" -> stopScan()
             "flipCamera" -> flipCamera(result)
             "toggleFlash" -> toggleFlash(result)
@@ -90,9 +74,7 @@ class QRView(messenger: BinaryMessenger, id: Int, private val context: Context,
             "requestPermissions" -> checkAndRequestPermission(result)
             "getCameraInfo" -> getCameraInfo(result)
             "getFlashInfo" -> getFlashInfo(result)
-//            "showNativeAlertDialog" -> showNativeAlertDialog(result)
             "getSystemFeatures" -> getSystemFeatures(result)
-            "setAllowedBarcodeFormats" -> setBarcodeFormats(call.arguments as List<Int>, result)
             else -> result.notImplemented()
         }
     }
@@ -209,7 +191,16 @@ class QRView(messenger: BinaryMessenger, id: Int, private val context: Context,
         return barcodeView
     }
 
-    private fun startScan() {
+    private fun startScan(arguments: List<Int>?, result: MethodChannel.Result) {
+        val allowedBarcodeTypes = mutableListOf<BarcodeFormat>()
+        try {
+            arguments?.forEach {
+                allowedBarcodeTypes.add(BarcodeFormat.values()[it])
+            }
+        } catch (e: java.lang.Exception) {
+            result.error(null, null, null)
+        }
+
         barcodeView?.decodeContinuous(
                 object : BarcodeCallback {
                     override fun barcodeResult(result: BarcodeResult) {
@@ -242,29 +233,6 @@ class QRView(messenger: BinaryMessenger, id: Int, private val context: Context,
         }
     }
 
-    private fun setBarcodeFormats(arguments: List<Int>, result: MethodChannel.Result) {
-        try {
-            allowedBarcodeTypes.clear()
-            arguments.forEach {
-                allowedBarcodeTypes.add(qrCodeTypes[it]!!)
-            }
-            result.success(true)
-        } catch (e: java.lang.Exception) {
-            result.error(null, null, null)
-        }
-    }
-
-//    private fun showNativeAlertDialog(result: MethodChannel.Result) {
-//        AlertDialog.Builder(context)
-//                .setTitle("Scanning Unavailable")
-//                .setMessage("This app does not have permission to access the camera")
-//                .setPositiveButton(R.string.ok, null)
-//                .setCancelable(false)
-//                .setIcon(R.drawable.ic_dialog_alert)
-//                .show()
-//        result.success(true)
-//    }
-
     private fun hasCameraPermission(): Boolean {
         return Build.VERSION.SDK_INT < Build.VERSION_CODES.M ||
                 Shared.activity?.checkSelfPermission(Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED

android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRViewFactory.kt

@@ -12,7 +12,7 @@ class QRViewFactory(private val messenger: BinaryMessenger) :
 
     override fun create(context: Context, id: Int, args: Any?): PlatformView {
         val params = args as HashMap<String, Any>
-        return QRView(messenger, id, context, params)
+        return QRView(messenger, id, params)
     }
 
 }

example/ios/Runner.xcodeproj/project.pbxproj

@@ -9,11 +9,11 @@
 /* Begin PBXBuildFile section */
 		1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */ = {isa = PBXBuildFile; fileRef = 1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */; };
 		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
+		4FA3805501F593094264678B /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 75B64521967C76C845268E71 /* Pods_Runner.framework */; };
 		74858FAF1ED2DC5600515810 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74858FAE1ED2DC5600515810 /* AppDelegate.swift */; };
 		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
 		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
 		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
-		F50BD2AA150CE43D961DBB69 /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = C211BF4383BB3311CB0313D6 /* Pods_Runner.framework */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXCopyFilesBuildPhase section */
@@ -30,15 +30,14 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
-		11A772D5271EABFB7473B52C /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
+		08F42BD28C1585A831B4FDA2 /* Pods-Runner.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.profile.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"; sourceTree = "<group>"; };
 		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };
 		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };
 		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };
-		4D86354DC939411D3F7E41EA /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
 		74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "Runner-Bridging-Header.h"; sourceTree = "<group>"; };
 		74858FAE1ED2DC5600515810 /* AppDelegate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
+		75B64521967C76C845268E71 /* Pods_Runner.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Runner.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Release.xcconfig; path = Flutter/Release.xcconfig; sourceTree = "<group>"; };
-		96DCE88542EFC8C39614159F /* Pods-Runner.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.profile.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"; sourceTree = "<group>"; };
 		9740EEB21CF90195004384FC /* Debug.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Debug.xcconfig; path = Flutter/Debug.xcconfig; sourceTree = "<group>"; };
 		9740EEB31CF90195004384FC /* Generated.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Generated.xcconfig; path = Flutter/Generated.xcconfig; sourceTree = "<group>"; };
 		97C146EE1CF9000F007C117D /* Runner.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Runner.app; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -46,7 +45,8 @@
 		97C146FD1CF9000F007C117D /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		97C147001CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		97C147021CF9000F007C117D /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
-		C211BF4383BB3311CB0313D6 /* Pods_Runner.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Runner.framework; sourceTree = BUILT_PRODUCTS_DIR; };
+		DB8991B7B046D94B2E68CEAD /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
+		EF8A0739582463E296AD6CB1 /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -54,21 +54,13 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				F50BD2AA150CE43D961DBB69 /* Pods_Runner.framework in Frameworks */,
+				4FA3805501F593094264678B /* Pods_Runner.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
-		509AC3E235E568B6DDAAEC7D /* Frameworks */ = {
-			isa = PBXGroup;
-			children = (
-				C211BF4383BB3311CB0313D6 /* Pods_Runner.framework */,
-			);
-			name = Frameworks;
-			sourceTree = "<group>";
-		};
 		9740EEB11CF90186004384FC /* Flutter */ = {
 			isa = PBXGroup;
 			children = (
@@ -87,7 +79,7 @@
 				97C146F01CF9000F007C117D /* Runner */,
 				97C146EF1CF9000F007C117D /* Products */,
 				D7C58E57CAF69D9A14CC212F /* Pods */,
-				509AC3E235E568B6DDAAEC7D /* Frameworks */,
+				AF031A634C9742F16BF4F89A /* Frameworks */,
 			);
 			sourceTree = "<group>";
 		};
@@ -122,12 +114,20 @@
 			name = "Supporting Files";
 			sourceTree = "<group>";
 		};
+		AF031A634C9742F16BF4F89A /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				75B64521967C76C845268E71 /* Pods_Runner.framework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
 		D7C58E57CAF69D9A14CC212F /* Pods */ = {
 			isa = PBXGroup;
 			children = (
-				4D86354DC939411D3F7E41EA /* Pods-Runner.debug.xcconfig */,
-				11A772D5271EABFB7473B52C /* Pods-Runner.release.xcconfig */,
-				96DCE88542EFC8C39614159F /* Pods-Runner.profile.xcconfig */,
+				DB8991B7B046D94B2E68CEAD /* Pods-Runner.debug.xcconfig */,
+				EF8A0739582463E296AD6CB1 /* Pods-Runner.release.xcconfig */,
+				08F42BD28C1585A831B4FDA2 /* Pods-Runner.profile.xcconfig */,
 			);
 			path = Pods;
 			sourceTree = "<group>";
@@ -139,14 +139,14 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */;
 			buildPhases = (
-				854A11C1BE2493D5A6BD85DB /* [CP] Check Pods Manifest.lock */,
+				7BEA526A4A0DFAAC4945EC09 /* [CP] Check Pods Manifest.lock */,
 				9740EEB61CF901F6004384FC /* Run Script */,
 				97C146EA1CF9000F007C117D /* Sources */,
 				97C146EB1CF9000F007C117D /* Frameworks */,
 				97C146EC1CF9000F007C117D /* Resources */,
 				9705A1C41CF9048500538489 /* Embed Frameworks */,
 				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
-				FDE6A3C9913AC5840FF42544 /* [CP] Embed Pods Frameworks */,
+				8DB6578C615972DBF2DFAA0D /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -221,7 +221,7 @@
 			shellPath = /bin/sh;
 			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" embed_and_thin";
 		};
-		854A11C1BE2493D5A6BD85DB /* [CP] Check Pods Manifest.lock */ = {
+		7BEA526A4A0DFAAC4945EC09 /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
@@ -243,39 +243,41 @@
 			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
 			showEnvVarsInLog = 0;
 		};
-		9740EEB61CF901F6004384FC /* Run Script */ = {
+		8DB6578C615972DBF2DFAA0D /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh",
+				"${PODS_ROOT}/../Flutter/Flutter.framework",
+				"${BUILT_PRODUCTS_DIR}/MTBBarcodeScanner/MTBBarcodeScanner.framework",
+				"${BUILT_PRODUCTS_DIR}/qr_code_scanner/qr_code_scanner.framework",
 			);
-			name = "Run Script";
+			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/Flutter.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/MTBBarcodeScanner.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/qr_code_scanner.framework",
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" build";
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
 		};
-		FDE6A3C9913AC5840FF42544 /* [CP] Embed Pods Frameworks */ = {
+		9740EEB61CF901F6004384FC /* Run Script */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
-				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh",
-				"${BUILT_PRODUCTS_DIR}/MTBBarcodeScanner/MTBBarcodeScanner.framework",
-				"${BUILT_PRODUCTS_DIR}/qr_code_scanner/qr_code_scanner.framework",
 			);
-			name = "[CP] Embed Pods Frameworks";
+			name = "Run Script";
 			outputPaths = (
-				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/MTBBarcodeScanner.framework",
-				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/qr_code_scanner.framework",
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh\"\n";
-			showEnvVarsInLog = 0;
+			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" build";
 		};
 /* End PBXShellScriptBuildPhase section */
 

example/lib/main.dart

@@ -132,6 +132,7 @@ class _QRViewExampleState extends State<QRViewExample> {
       key: qrKey,
       cameraFacing: CameraFacing.front,
       onQRViewCreated: _onQRViewCreated,
+      formatsAllowed: [BarcodeFormat.qrcode],
       overlay: QrScannerOverlayShape(
         borderColor: Colors.red,
         borderRadius: 10,

ios/Classes/QRView.swift

@@ -15,20 +15,18 @@ public class QRView:NSObject,FlutterPlatformView {
     var channel: FlutterMethodChannel
     var cameraFacing: MTBCamera
     
-    var allowedBarcodeTypes: Array<AVMetadataObject.ObjectType> = []
-    
     var QRCodeTypes = [
           0: AVMetadataObject.ObjectType.aztec,
-          1: AVMetadataObject.ObjectType.code128,
           2: AVMetadataObject.ObjectType.code39,
           3: AVMetadataObject.ObjectType.code93,
-          4: AVMetadataObject.ObjectType.dataMatrix,
-          5: AVMetadataObject.ObjectType.ean13,
+          4: AVMetadataObject.ObjectType.code128,
+          5: AVMetadataObject.ObjectType.dataMatrix,
           6: AVMetadataObject.ObjectType.ean8,
-          7: AVMetadataObject.ObjectType.interleaved2of5,
-          8: AVMetadataObject.ObjectType.pdf417,
-          9: AVMetadataObject.ObjectType.qr,
-          10: AVMetadataObject.ObjectType.upce
+          7: AVMetadataObject.ObjectType.ean13,
+          8: AVMetadataObject.ObjectType.interleaved2of5,
+          10: AVMetadataObject.ObjectType.pdf417,
+          11: AVMetadataObject.ObjectType.qr,
+          15: AVMetadataObject.ObjectType.upce
          ]
     
     public init(withFrame frame: CGRect, withRegistrar registrar: FlutterPluginRegistrar, withId id: Int64, params: Dictionary<String, Any>){
@@ -50,7 +48,7 @@ public class QRView:NSObject,FlutterPlatformView {
                     let arguments = call.arguments as! Dictionary<String, Double>
                     self?.setDimensions(width: arguments["width"] ?? 0, height: arguments["height"] ?? 0, scanArea: arguments["scanArea"] ?? 0)
                 case "startScan":
-                    self?.startScan(result)
+                    self?.startScan(call.arguments as! Array<Int>, result)
                 case "flipCamera":
                     self?.flipCamera(result)
                 case "toggleFlash":
@@ -63,12 +61,8 @@ public class QRView:NSObject,FlutterPlatformView {
                     self?.getCameraInfo(result)
                 case "getFlashInfo":
                     self?.getFlashInfo(result)
-                case "showNativeAlertDialog":
-                    self?.showNativeAlertDialog(result)
                 case "getSystemFeatures":
                     self?.getSystemFeatures(result)
-                case "setAllowedBarcodeFormats":
-                    self?.setBarcodeFormats(call.arguments as! Array<Int>, result)
                 default:
                     result(FlutterMethodNotImplemented)
                     return
@@ -96,45 +90,51 @@ public class QRView:NSObject,FlutterPlatformView {
         }
     }
     
-    func startScan(_ result: @escaping FlutterResult) -> Void {
+    func startScan(_ arguments: Array<Int>, _ result: @escaping FlutterResult) -> Void {
         scanner = MTBBarcodeScanner(previewView: previewView)
         
+        var allowedBarcodeTypes: Array<AVMetadataObject.ObjectType> = []
+        arguments.forEach { arg in
+            allowedBarcodeTypes.append( QRCodeTypes[arg]!)
+        }
+
         MTBBarcodeScanner.requestCameraPermission(success: { permissionGranted in
             if permissionGranted {
                 do {
                     try self.scanner?.startScanning(with: self.cameraFacing, resultBlock: { [weak self] codes in
                         if let codes = codes {
                             for code in codes {
-                                var typeString: String;
-                                switch(code.type) {
-                                    case AVMetadataObject.ObjectType.aztec:
-                                       typeString = "AZTEC"
-                                    case AVMetadataObject.ObjectType.code39:
-                                        typeString = "CODE_39"
-                                    case AVMetadataObject.ObjectType.code93:
-                                        typeString = "CODE_93"
-                                    case AVMetadataObject.ObjectType.code128:
-                                        typeString = "CODE_128"
-                                    case AVMetadataObject.ObjectType.dataMatrix:
-                                        typeString = "DATA_MATRIX"
-                                    case AVMetadataObject.ObjectType.ean8:
-                                        typeString = "EAN_8"
-                                    case AVMetadataObject.ObjectType.ean13:
-                                        typeString = "EAN_13"
-                                    case AVMetadataObject.ObjectType.itf14:
-                                        typeString = "ITF"
-                                    case AVMetadataObject.ObjectType.pdf417:
-                                        typeString = "PDF_417"
-                                    case AVMetadataObject.ObjectType.qr:
-                                        typeString = "QR_CODE"
-                                    case AVMetadataObject.ObjectType.upce:
-                                        typeString = "UPC_E"
-                                    default:
-                                        return
-                                }
+//                                var typeString: String;
+//                                switch(code.type) {
+//                                    case AVMetadataObject.ObjectType.aztec:
+//                                       typeString = "AZTEC"
+//                                    case AVMetadataObject.ObjectType.code39:
+//                                        typeString = "CODE_39"
+//                                    case AVMetadataObject.ObjectType.code93:
+//                                        typeString = "CODE_93"
+//                                    case AVMetadataObject.ObjectType.code128:
+//                                        typeString = "CODE_128"
+//                                    case AVMetadataObject.ObjectType.dataMatrix:
+//                                        typeString = "DATA_MATRIX"
+//                                    case AVMetadataObject.ObjectType.ean8:
+//                                        typeString = "EAN_8"
+//                                    case AVMetadataObject.ObjectType.ean13:
+//                                        typeString = "EAN_13"
+//                                    case AVMetadataObject.ObjectType.itf14:
+//                                        typeString = "ITF"
+//                                    case AVMetadataObject.ObjectType.pdf417:
+//                                        typeString = "PDF_417"
+//                                    case AVMetadataObject.ObjectType.qr:
+//                                        typeString = "QR_CODE"
+//                                    case AVMetadataObject.ObjectType.upce:
+//                                        typeString = "UPC_E"
+//                                    default:
+//                                        return
+//                                }
                                 guard let stringValue = code.stringValue else { continue }
+                                let typeString = code.type.rawValue
                                 let result = ["code": stringValue, "type": typeString]
-                                if self!.allowedBarcodeTypes.count == 0 || self!.allowedBarcodeTypes.contains(code.type) {
+                                if allowedBarcodeTypes.count == 0 || allowedBarcodeTypes.contains(code.type) {
                                     self?.channel.invokeMethod("onRecognizeQR", arguments: result)
                                 }
                                 
@@ -218,11 +218,6 @@ public class QRView:NSObject,FlutterPlatformView {
         }
         return result(FlutterError(code: "404", message: "No barcode scanner found", details: nil))
     }
-    
-    func showNativeAlertDialog(_ result: @escaping FlutterResult) -> Void {
-        UIAlertView(title: "Scanning Unavailable", message: "This app does not have permission to access the camera", delegate: nil, cancelButtonTitle: nil, otherButtonTitles: "Ok").show()
-        return result(true)
-    }
 
     func getSystemFeatures(_ result: @escaping FlutterResult) -> Void {
         if let sc: MTBBarcodeScanner = scanner {
@@ -251,15 +246,4 @@ public class QRView:NSObject,FlutterPlatformView {
         return result(FlutterError(code: "404", message: nil, details: nil))
     }
 
-    func setBarcodeFormats(_ arguments: Array<Int>, _ result: @escaping FlutterResult){
-        do{
-            allowedBarcodeTypes.removeAll()
-            try arguments.forEach { arg in
-                allowedBarcodeTypes.append(try QRCodeTypes[arg]!)
-            }
-            result(true)
-        }catch{
-            result(FlutterError(code: "404", message: nil, details: nil))
-        }
-    }
  }

lib/qr_code_scanner.dart

@@ -1,5 +1,7 @@
 export 'src/qr_code_scanner.dart';
 export 'src/qr_scanner_overlay_shape.dart';
 export 'src/types/barcode.dart';
+export 'src/types/barcode_format.dart';
 export 'src/types/camera.dart';
+export 'src/types/camera_exception.dart';
 export 'src/types/features.dart';

lib/src/qr_code_scanner.dart

@@ -24,7 +24,7 @@ class QRView extends StatefulWidget {
     this.overlayMargin = EdgeInsets.zero,
     this.cameraFacing = CameraFacing.back,
     this.onPermissionSet,
-    this.showNativeAlertDialog = false,
+    this.formatsAllowed,
   })  : assert(key != null),
         assert(onQRViewCreated != null),
         super(key: key);
@@ -48,8 +48,8 @@ class QRView extends StatefulWidget {
   /// Calls the provided [onPermissionSet] callback when the permission is set.
   final PermissionSetCallback onPermissionSet;
 
-  /// Gives the possibility to show a dialog.
-  final bool showNativeAlertDialog;
+  /// Use [formatsAllowed] to specify which formats needs to be scanned.
+  final List<BarcodeFormat> formatsAllowed;
 
   @override
   State<StatefulWidget> createState() => _QRViewState();
@@ -133,8 +133,8 @@ class _QRViewState extends State<QRView> {
 
     // Start scan after creation of the view
     final controller = QRViewController._(_channel, widget.key, cutOutSize,
-        widget.onPermissionSet, widget.showNativeAlertDialog)
-      .._startScan(widget.key, cutOutSize);
+        widget.onPermissionSet)
+      .._startScan(widget.key, cutOutSize, widget.formatsAllowed);
 
     // Initialize the controller for controlling the QRView
     if (widget.onQRViewCreated != null) {
@@ -162,8 +162,7 @@ class QRViewController {
     MethodChannel channel,
     GlobalKey qrKey,
     double scanArea,
-    PermissionSetCallback onPermissionSet,
-    bool showNativeAlertDialogOnError,
+    PermissionSetCallback onPermissionSet
   ) : _channel = channel {
     _channel.setMethodCallHandler((call) async {
       switch (call.method) {
@@ -190,9 +189,6 @@ class QRViewController {
               _hasPermissions = true;
             } else {
               _hasPermissions = false;
-              if (showNativeAlertDialogOnError) {
-                await showNativeAlertDialog();
-              }
             }
             if (onPermissionSet != null) {
               onPermissionSet(this, call.arguments as bool);
@@ -219,12 +215,14 @@ class QRViewController {
   Future<void> _startScan(
     GlobalKey key,
     double cutOutSize,
-  ) async {
+      List<BarcodeFormat> barcodeFormats) async {
     // We need to update the dimension before the scan is started.
     QRViewController.updateDimensions(key, _channel, scanArea: cutOutSize);
-    return _channel.invokeMethod('startScan');
+    return _channel.invokeMethod('startScan',
+        barcodeFormats?.map((e) => e.asInt())?.toList() ?? []);
   }
 
+  /// Gets information about which camera is active.
   Future<CameraFacing> getCameraInfo() async {
     try {
       return CameraFacing
@@ -280,23 +278,7 @@ class QRViewController {
     }
   }
 
-  Future<void> showNativeAlertDialog() async {
-    try {
-      await _channel.invokeMethod('showNativeAlertDialog');
-    } on PlatformException catch (e) {
-      throw CameraException(e.code, e.message);
-    }
-  }
-
-  Future<void> setAllowedBarcodeTypes(List<BarcodeFormat> list) async {
-    try {
-      await _channel.invokeMethod('setAllowedBarcodeFormats',
-          list?.map((e) => e.asInt())?.toList() ?? []);
-    } on PlatformException catch (e) {
-      throw CameraException(e.code, e.message);
-    }
-  }
-
+  /// Returns which features are available on device.
   Future<SystemFeatures> getSystemFeatures() async {
     try {
       var features =