Merge PR #105.

.github/workflows/windows.yml

@@ -39,7 +39,7 @@ jobs:
         run: flutter build windows
 
       - name: Check generated files
-        run: git diff --exit-code
+        run: git diff -I '.*android.*flutter_plugins.*qrscanner_zxing' --exit-code
 
       - name: Move .dll files
         run: |

android/flutter_plugins/qrscanner_zxing/.gitignore

@@ -0,0 +1,30 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+# Libraries should not include pubspec.lock, per https://dart.dev/guides/libraries/private-files#pubspeclock.
+/pubspec.lock
+**/doc/api/
+.dart_tool/
+.packages
+build/

android/flutter_plugins/qrscanner_zxing/.metadata

@@ -0,0 +1,30 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled.
+
+version:
+  revision: 13a2fb10b838971ce211230f8ffdd094c14af02c
+  channel: beta
+
+project_type: plugin
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: 13a2fb10b838971ce211230f8ffdd094c14af02c
+      base_revision: 13a2fb10b838971ce211230f8ffdd094c14af02c
+    - platform: android
+      create_revision: 13a2fb10b838971ce211230f8ffdd094c14af02c
+      base_revision: 13a2fb10b838971ce211230f8ffdd094c14af02c
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'

android/flutter_plugins/qrscanner_zxing/CHANGELOG.md

@@ -0,0 +1,3 @@
+## 1.0.0
+
+Initial

android/flutter_plugins/qrscanner_zxing/README.md

@@ -0,0 +1,4 @@
+# qscanner_zxing
+
+Android-only Flutter plugin for scanning QR Codes. Implemented with zxing and CameraX
+

android/flutter_plugins/qrscanner_zxing/analysis_options.yaml

@@ -0,0 +1,4 @@
+include: package:flutter_lints/flutter.yaml
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

android/flutter_plugins/qrscanner_zxing/android/.gitignore

@@ -0,0 +1,9 @@
+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+.cxx

android/flutter_plugins/qrscanner_zxing/android/build.gradle

@@ -0,0 +1,57 @@
+group 'com.yubico.authenticator.flutter_plugins.qrscanner_zxing'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    ext.kotlin_version = '1.6.21'
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:7.1.3'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+rootProject.allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+
+android {
+    compileSdkVersion 31
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+    }
+
+    defaultConfig {
+        minSdkVersion 21
+    }
+}
+
+dependencies {
+    def camerax_version = "1.1.0-beta03"
+    implementation "androidx.camera:camera-lifecycle:${camerax_version}"
+    implementation "androidx.camera:camera-view:${camerax_version}"
+    implementation "androidx.camera:camera-camera2:${camerax_version}"
+
+    def zxing_version = "3.3.0"
+    implementation "com.google.zxing:core:${zxing_version}"
+    implementation "com.google.zxing:android-core:${zxing_version}"
+}

android/flutter_plugins/qrscanner_zxing/android/gradle.properties

@@ -0,0 +1,15 @@
+## For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+#
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+# Default value: -Xmx1024m -XX:MaxPermSize=256m
+# org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
+#
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
+#Fri Apr 22 08:06:54 CEST 2022
+android.useAndroidX=true
+android.enableJetifier=true

android/flutter_plugins/qrscanner_zxing/android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Fri Jun 23 08:50:38 CEST 2017
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-all.zip

android/flutter_plugins/qrscanner_zxing/android/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'qrscanner_zxing'

android/flutter_plugins/qrscanner_zxing/android/src/main/AndroidManifest.xml

@@ -0,0 +1,8 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+  package="com.yubico.authenticator.flutter_plugins.qrscanner_zxing">
+
+    <uses-feature android:name="android.hardware.camera.any" />
+
+    <uses-permission android:name="android.permission.CAMERA" />
+
+</manifest>

android/flutter_plugins/qrscanner_zxing/android/src/main/kotlin/com/yubico/authenticator/flutter_plugins/qrscanner_zxing/QRScannerView.kt

@@ -0,0 +1,278 @@
+package com.yubico.authenticator.flutter_plugins.qrscanner_zxing
+
+import android.Manifest
+import android.app.Activity
+import android.content.Context
+import android.content.pm.PackageManager
+import android.os.Handler
+import android.os.Looper
+import android.util.Log
+import android.view.View
+import android.widget.TextView
+import androidx.camera.core.*
+import androidx.camera.lifecycle.ProcessCameraProvider
+import androidx.camera.view.PreviewView
+import androidx.core.app.ActivityCompat
+import androidx.core.content.ContextCompat
+import androidx.lifecycle.LifecycleOwner
+import com.google.zxing.*
+import com.google.zxing.common.HybridBinarizer
+import io.flutter.plugin.common.BinaryMessenger
+import io.flutter.plugin.common.MethodChannel
+import io.flutter.plugin.common.PluginRegistry
+import io.flutter.plugin.common.StandardMessageCodec
+import io.flutter.plugin.platform.PlatformView
+import io.flutter.plugin.platform.PlatformViewFactory
+import org.json.JSONObject
+import java.nio.ByteBuffer
+import java.util.concurrent.ExecutorService
+import java.util.concurrent.Executors
+import kotlin.Result
+import kotlin.math.min
+
+class QRScannerViewFactory(
+    private val binaryMessenger: BinaryMessenger,
+    private val permissionsResultRegistrar: PermissionsResultRegistrar
+) :
+    PlatformViewFactory(StandardMessageCodec.INSTANCE) {
+    @Suppress("UNCHECKED_CAST")
+    override fun create(context: Context?, viewId: Int, args: Any?): PlatformView {
+        val creationParams = args as Map<String?, Any?>?
+        return QRScannerView(
+            context!!,
+            viewId,
+            binaryMessenger,
+            permissionsResultRegistrar,
+            creationParams
+        )
+    }
+}
+
+typealias BarcodeAnalyzerListener = (Result<String>) -> Unit
+
+internal class QRScannerView(
+    context: Context,
+    id: Int,
+    binaryMessenger: BinaryMessenger,
+    private val permissionsResultRegistrar: PermissionsResultRegistrar,
+    creationParams: Map<String?, Any?>?
+) : PlatformView {
+
+    private val uiThreadHandler = Handler(Looper.getMainLooper())
+
+    private var marginPct: Double? = null
+
+    companion object {
+        const val TAG = "QRScannerView"
+
+        // permission related
+        const val PERMISSION_REQUEST_CODE = 1
+        private val PERMISSIONS_TO_REQUEST =
+            mutableListOf(
+                Manifest.permission.CAMERA,
+            ).toTypedArray()
+
+        // view related
+        private const val QR_SCANNER_ASPECT_RATIO = AspectRatio.RATIO_4_3
+
+        // communication channel
+        private const val CHANNEL_NAME =
+            "com.yubico.authenticator.flutter_plugins.qr_scanner_channel"
+    }
+
+    private fun allPermissionsGranted(activity: Activity) = PERMISSIONS_TO_REQUEST.all {
+        ContextCompat.checkSelfPermission(
+            activity, it
+        ) == PackageManager.PERMISSION_GRANTED
+    }
+
+    private fun requestPermissions(activity: Activity) {
+        ActivityCompat.requestPermissions(
+            activity,
+            PERMISSIONS_TO_REQUEST,
+            PERMISSION_REQUEST_CODE
+        )
+    }
+
+    private val qrScannerView = View.inflate(context, R.layout.qr_scanner_view, null)
+    private val previewView = qrScannerView.findViewById<PreviewView>(R.id.preview_view).also {
+        it.scaleType = PreviewView.ScaleType.FILL_CENTER
+    }
+    private val infoText = qrScannerView.findViewById<TextView>(R.id.info_text)
+
+    private val cameraExecutor: ExecutorService = Executors.newSingleThreadExecutor()
+    private val cameraProviderFuture = ProcessCameraProvider.getInstance(context)
+    private var cameraProvider: ProcessCameraProvider? = null
+    private val cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA
+
+    private var imageAnalyzer: ImageAnalysis? = null
+    private var preview: Preview? = null
+
+    override fun getView(): View {
+        return qrScannerView
+    }
+
+    override fun dispose() {
+        cameraProvider?.unbindAll()
+        preview = null
+        imageAnalyzer = null
+        cameraExecutor.shutdown()
+        Log.d(TAG, "View disposed")
+    }
+
+    private val methodChannel: MethodChannel = MethodChannel(binaryMessenger, CHANNEL_NAME)
+    private var permissionsGranted = false
+
+    init {
+
+        // read margin parameter
+        // only use it if it has reasonable value
+        if (creationParams?.get("margin") is Number) {
+            val marginValue = creationParams["margin"] as Number
+            if (marginValue.toDouble() > 0.0 && marginValue.toDouble() < 45) {
+                marginPct = marginValue.toDouble()
+            }
+        }
+
+        if (context is Activity) {
+            permissionsGranted = allPermissionsGranted(context)
+
+            if (!permissionsGranted) {
+                requestPermissionsFromUser(context)
+            } else {
+                bindUseCases(context)
+            }
+        }
+    }
+
+    private fun requestPermissionsFromUser(activity: Activity) {
+        permissionsResultRegistrar.setListener(
+            object : PluginRegistry.RequestPermissionsResultListener {
+                override fun onRequestPermissionsResult(
+                    requestCode: Int,
+                    permissions: Array<out String>,
+                    grantResults: IntArray
+                ): Boolean {
+                    if (requestCode == PERMISSION_REQUEST_CODE) {
+                        if (permissions.size == 1 && grantResults.size == 1) {
+                            if (permissions.first() == PERMISSIONS_TO_REQUEST.first() &&
+                                grantResults.first() == PackageManager.PERMISSION_GRANTED
+                            ) {
+                                previewView.visibility = View.VISIBLE
+                                infoText.visibility = View.GONE
+                                bindUseCases(activity)
+                            } else {
+                                previewView.visibility = View.GONE
+                                infoText.visibility = View.VISIBLE
+                                infoText.setText(R.string.please_grant_permissions)
+                            }
+                        } else {
+                            previewView.visibility = View.GONE
+                            infoText.visibility = View.VISIBLE
+                            infoText.setText(R.string.please_grant_permissions)
+                        }
+                        return true
+                    }
+
+                    return false
+                }
+            })
+
+        requestPermissions(activity)
+    }
+
+    private fun bindUseCases(context: Context) {
+        cameraProviderFuture.addListener({
+            previewView.visibility = View.VISIBLE
+            cameraProvider = cameraProviderFuture.get()
+
+            cameraProvider?.unbindAll()
+
+            imageAnalyzer = ImageAnalysis.Builder()
+                .setBackpressureStrategy(ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST)
+                .setTargetAspectRatio(QR_SCANNER_ASPECT_RATIO)
+                .build()
+                .also {
+                    it.setAnalyzer(cameraExecutor, BarcodeAnalyzer(marginPct) { analyzeResult ->
+                        if (analyzeResult.isSuccess) {
+                            analyzeResult.getOrNull()?.let { result ->
+                                uiThreadHandler.post {
+                                    methodChannel.invokeMethod(
+                                        "codeFound", JSONObject(
+                                            mapOf("value" to result)
+                                        ).toString()
+                                    )
+                                }
+                            }
+                        }
+                    })
+                }
+
+            preview = Preview.Builder()
+                .setTargetAspectRatio(QR_SCANNER_ASPECT_RATIO)
+                .build()
+                .also {
+                    it.setSurfaceProvider(previewView.surfaceProvider)
+                }
+
+            cameraProvider?.bindToLifecycle(
+                context as LifecycleOwner,
+                cameraSelector,
+                preview, imageAnalyzer
+            )
+        }, ContextCompat.getMainExecutor(context))
+    }
+
+    private class BarcodeAnalyzer(
+        private val marginPct: Double?,
+        private val listener: BarcodeAnalyzerListener
+    ) :
+        ImageAnalysis.Analyzer {
+
+        private fun ByteBuffer.toByteArray(): ByteArray {
+            rewind()
+            val data = ByteArray(remaining())
+            get(data)
+            return data
+        }
+
+        override fun analyze(imageProxy: ImageProxy) {
+            try {
+                val buffer = imageProxy.planes[0].buffer
+                val intArray = buffer.toByteArray().map { it.toInt() }.toIntArray()
+
+                val source: LuminanceSource =
+                    RGBLuminanceSource(imageProxy.width, imageProxy.height, intArray)
+
+                val fullSize = BinaryBitmap(HybridBinarizer(source))
+
+                val bitmapToProcess = if (marginPct != null) {
+                    val shorterDim = min(imageProxy.width, imageProxy.height)
+                    val cropMargin = marginPct * 0.01 * shorterDim
+                    val cropWH = shorterDim - 2.0 * cropMargin
+                    val cropT = (imageProxy.height - cropWH) / 2.0
+                    val cropL = (imageProxy.width - cropWH) / 2.0
+                    fullSize.crop(
+                        cropL.toInt(),
+                        cropT.toInt(),
+                        cropWH.toInt(),
+                        cropWH.toInt()
+                    )
+                } else {
+                    fullSize
+                }
+
+                val reader = MultiFormatReader()
+                val result: com.google.zxing.Result = reader.decode(bitmapToProcess)
+                Log.d(TAG, "Result text: ${result.text}")
+                listener.invoke(Result.success(result.text))
+            } catch (_: NotFoundException) {
+                // ignored: no code was found
+            } finally {
+                // important call
+                imageProxy.close()
+            }
+        }
+    }
+
+}

android/flutter_plugins/qrscanner_zxing/android/src/main/kotlin/com/yubico/authenticator/flutter_plugins/qrscanner_zxing/QRScannerZxingPlugin.kt

@@ -0,0 +1,85 @@
+package com.yubico.authenticator.flutter_plugins.qrscanner_zxing
+
+import androidx.annotation.NonNull
+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.MethodCall
+import io.flutter.plugin.common.MethodChannel
+import io.flutter.plugin.common.MethodChannel.MethodCallHandler
+import io.flutter.plugin.common.MethodChannel.Result
+import io.flutter.plugin.common.PluginRegistry
+
+class PermissionsResultRegistrar {
+
+    private var permissionsResultListener: PluginRegistry.RequestPermissionsResultListener? = null
+
+    fun setListener(listener: PluginRegistry.RequestPermissionsResultListener?) {
+        permissionsResultListener = listener
+    }
+
+    fun onResult(
+        requestCode: Int,
+        permissions: Array<out String>,
+        grantResults: IntArray
+    ): Boolean {
+        return permissionsResultListener?.onRequestPermissionsResult(
+            requestCode,
+            permissions,
+            grantResults
+        ) ?: false
+    }
+}
+
+/** QRScannerZxingPlugin */
+class QRScannerZxingPlugin : FlutterPlugin, MethodCallHandler, ActivityAware,
+    PluginRegistry.RequestPermissionsResultListener {
+
+    private val registrar = PermissionsResultRegistrar()
+    private lateinit var channel: MethodChannel
+
+    override fun onAttachedToEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
+        channel = MethodChannel(binding.binaryMessenger, "qrscanner_zxing")
+        channel.setMethodCallHandler(this)
+
+        binding.platformViewRegistry
+            .registerViewFactory(
+                "qrScannerNativeView",
+                QRScannerViewFactory(binding.binaryMessenger, registrar)
+            )
+    }
+
+    override fun onMethodCall(@NonNull call: MethodCall, @NonNull result: Result) {
+        if (call.method == "getPlatformVersion") {
+            result.success("Android ${android.os.Build.VERSION.RELEASE}")
+        } else {
+            result.notImplemented()
+        }
+    }
+
+    override fun onDetachedFromEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
+        channel.setMethodCallHandler(null)
+    }
+
+    override fun onAttachedToActivity(binding: ActivityPluginBinding) {
+        binding.addRequestPermissionsResultListener(this)
+    }
+
+    override fun onDetachedFromActivityForConfigChanges() {
+    }
+
+    override fun onReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) {
+
+    }
+
+    override fun onDetachedFromActivity() {
+    }
+
+    override fun onRequestPermissionsResult(
+        requestCode: Int,
+        permissions: Array<out String>,
+        grantResults: IntArray
+    ): Boolean {
+        return registrar.onResult(requestCode, permissions, grantResults)
+    }
+}

android/flutter_plugins/qrscanner_zxing/android/src/main/res/layout/qr_scanner_view.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@android:color/background_dark">
+
+    <TextView
+        android:id="@+id/info_text"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:textColor="@android:color/black"
+        android:background="@android:color/background_light"
+        android:gravity="left"
+        android:textSize="12sp"
+        android:lineSpacingMultiplier="1.2"
+        android:layout_margin="32dp"
+        android:padding="16dp"
+        android:drawableStart="@android:drawable/ic_dialog_alert"
+        android:drawablePadding="16dp"
+        android:text="@string/please_grant_permissions" />
+
+    <androidx.camera.view.PreviewView
+        android:visibility="gone"
+        android:id="@+id/preview_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+</FrameLayout>

android/flutter_plugins/qrscanner_zxing/android/src/main/res/values/strings.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="please_grant_permissions">The QR scanner cannot work properly because grant of Camera permissions is missing.\n\nPlease, fix this by changing the Camera permissions setting in the phone Settings.</string>
+    <string name="initializing">Please wait…</string>
+</resources>

android/flutter_plugins/qrscanner_zxing/example/.gitignore

@@ -0,0 +1,47 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.packages
+.pub-cache/
+.pub/
+/build/
+
+# Web related
+lib/generated_plugin_registrant.dart
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release

android/flutter_plugins/qrscanner_zxing/example/README.md

@@ -0,0 +1,16 @@
+# qrscanner_zxing_example
+
+Demonstrates how to use the qrscanner_zxing plugin.
+
+## Getting Started
+
+This project is a starting point for a Flutter application.
+
+A few resources to get you started if this is your first Flutter project:
+
+- [Lab: Write your first Flutter app](https://docs.flutter.dev/get-started/codelab)
+- [Cookbook: Useful Flutter samples](https://docs.flutter.dev/cookbook)
+
+For help getting started with Flutter development, view the
+[online documentation](https://docs.flutter.dev/), which offers tutorials,
+samples, guidance on mobile development, and a full API reference.

android/flutter_plugins/qrscanner_zxing/example/analysis_options.yaml

@@ -0,0 +1,29 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at
+  # https://dart-lang.github.io/linter/lints/index.html.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

android/flutter_plugins/qrscanner_zxing/example/android/.gitignore

@@ -0,0 +1,13 @@
+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
+key.properties
+**/*.keystore
+**/*.jks

android/flutter_plugins/qrscanner_zxing/example/android/app/build.gradle

@@ -0,0 +1,71 @@
+def localProperties = new Properties()
+def localPropertiesFile = rootProject.file('local.properties')
+if (localPropertiesFile.exists()) {
+    localPropertiesFile.withReader('UTF-8') { reader ->
+        localProperties.load(reader)
+    }
+}
+
+def flutterRoot = localProperties.getProperty('flutter.sdk')
+if (flutterRoot == null) {
+    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
+}
+
+def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
+if (flutterVersionCode == null) {
+    flutterVersionCode = '1'
+}
+
+def flutterVersionName = localProperties.getProperty('flutter.versionName')
+if (flutterVersionName == null) {
+    flutterVersionName = '1.0'
+}
+
+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
+
+android {
+    compileSdkVersion flutter.compileSdkVersion
+    ndkVersion flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+    }
+
+    defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId "com.yubico.authenticator.flutter_plugins.qrscanner_zxing_example"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
+        minSdkVersion 21
+        targetSdkVersion flutter.targetSdkVersion
+        versionCode flutterVersionCode.toInteger()
+        versionName flutterVersionName
+    }
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig signingConfigs.debug
+        }
+    }
+}
+
+flutter {
+    source '../..'
+}
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+}

android/flutter_plugins/qrscanner_zxing/example/android/app/src/debug/AndroidManifest.xml

@@ -0,0 +1,8 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.yubico.authenticator.flutter_plugins.qrscanner_zxing_example">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

android/flutter_plugins/qrscanner_zxing/example/android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,34 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.yubico.authenticator.flutter_plugins.qrscanner_zxing_example">
+   <application
+        android:label="qrscanner_zxing_example"
+        android:name="${applicationName}"
+        android:icon="@mipmap/ic_launcher">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:launchMode="singleTop"
+            android:theme="@style/LaunchTheme"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:hardwareAccelerated="true"
+            android:windowSoftInputMode="adjustResize">
+            <!-- Specifies an Android theme to apply to this Activity as soon as
+                 the Android process has started. This theme is visible to the user
+                 while the Flutter UI initializes. After that, this theme continues
+                 to determine the Window background behind the Flutter UI. -->
+            <meta-data
+              android:name="io.flutter.embedding.android.NormalTheme"
+              android:resource="@style/NormalTheme"
+              />
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+        <!-- Don't delete the meta-data below.
+             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
+    </application>
+</manifest>

android/flutter_plugins/qrscanner_zxing/example/android/app/src/main/kotlin/com/yubico/authenticator/flutter_plugins/qrscanner_zxing_example/MainActivity.kt

@@ -0,0 +1,6 @@
+package com.yubico.authenticator.flutter_plugins.qrscanner_zxing_example
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity: FlutterActivity() {
+}

android/flutter_plugins/qrscanner_zxing/example/android/app/src/main/res/drawable-v21/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?android:colorBackground" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

android/flutter_plugins/qrscanner_zxing/example/android/app/src/main/res/drawable/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@android:color/white" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

android/flutter_plugins/qrscanner_zxing/example/android/app/src/main/res/values-night/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

android/flutter_plugins/qrscanner_zxing/example/android/app/src/main/res/values/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

android/flutter_plugins/qrscanner_zxing/example/android/app/src/profile/AndroidManifest.xml

@@ -0,0 +1,8 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.yubico.authenticator.flutter_plugins.qrscanner_zxing_example">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

android/flutter_plugins/qrscanner_zxing/example/android/build.gradle

@@ -0,0 +1,31 @@
+buildscript {
+    ext.kotlin_version = '1.6.10'
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:7.1.2'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.buildDir = '../build'
+subprojects {
+    project.buildDir = "${rootProject.buildDir}/${project.name}"
+}
+subprojects {
+    project.evaluationDependsOn(':app')
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

android/flutter_plugins/qrscanner_zxing/example/android/gradle.properties

@@ -0,0 +1,3 @@
+org.gradle.jvmargs=-Xmx1536M
+android.useAndroidX=true
+android.enableJetifier=true

android/flutter_plugins/qrscanner_zxing/example/android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Fri Jun 23 08:50:38 CEST 2017
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-all.zip

android/flutter_plugins/qrscanner_zxing/example/android/settings.gradle

@@ -0,0 +1,11 @@
+include ':app'
+
+def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
+def properties = new Properties()
+
+assert localPropertiesFile.exists()
+localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
+
+def flutterSdkPath = properties.getProperty("flutter.sdk")
+assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"

android/flutter_plugins/qrscanner_zxing/example/lib/cutout_overlay.dart

@@ -0,0 +1,60 @@
+import 'dart:math';
+
+import 'package:flutter/material.dart';
+
+class CutoutOverlay extends StatelessWidget {
+  final int marginPct;
+  const CutoutOverlay({Key? key, required this.marginPct}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+        behavior: HitTestBehavior.translucent,
+        child: CustomPaint(
+          painter: CutoutPainter(marginPct: marginPct),
+        ));
+  }
+}
+
+class CutoutPainter extends CustomPainter {
+  final int marginPct;
+  CutoutPainter({required this.marginPct});
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    final overlayPaint = Paint()..color = Colors.black54;
+    final strokePaint = Paint()
+      ..color = Colors.green
+      ..style = PaintingStyle.stroke
+      ..strokeWidth = 2;
+
+    final shorterDim = min(size.width, size.height);
+
+    final cutoutWidth = shorterDim - (2 * shorterDim * marginPct / 100);
+
+    final cutoutRect = Rect.fromCenter(
+      center: Offset(size.width / 2, size.height / 2),
+      width: cutoutWidth,
+      height: cutoutWidth,
+    );
+
+    final cutOutRRect =
+        RRect.fromRectAndRadius(cutoutRect, const Radius.circular(5.0));
+    final targetPath = Path()..addRRect(cutOutRRect);
+
+    canvas.drawPath(
+        Path.combine(
+          PathOperation.difference,
+          Path()..addRect(Rect.fromLTWH(0, 0, size.width, size.height)),
+          targetPath..close(),
+        ),
+        overlayPaint);
+
+    canvas.drawPath(targetPath, strokePaint);
+  }
+
+  @override
+  bool shouldRepaint(CustomPainter oldDelegate) {
+    return false;
+  }
+}

android/flutter_plugins/qrscanner_zxing/example/lib/main.dart

@@ -0,0 +1,162 @@
+import 'package:flutter/material.dart';
+import 'package:qrscanner_zxing/qrscanner_zxing_view.dart';
+
+import 'cutout_overlay.dart';
+
+void main() {
+  runApp(const QRCodeScannerExampleApp());
+}
+
+class QRCodeScannerExampleApp extends StatelessWidget {
+  const QRCodeScannerExampleApp({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'QR Scanner Example',
+      theme: ThemeData(
+        primarySwatch: Colors.teal,
+      ),
+      home: const AppHomePage(title: 'QR Scanner Example'),
+    );
+  }
+}
+
+class AppHomePage extends StatelessWidget {
+  const AppHomePage({Key? key, required this.title}) : super(key: key);
+  final String title;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(title),
+      ),
+      body: Center(
+        child: Column(
+          mainAxisSize: MainAxisSize.max,
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            ElevatedButton(
+                onPressed: () {
+                  Navigator.push(
+                      context,
+                      PageRouteBuilder(
+                        pageBuilder: (_, __, ___) => const QRScannerPage(),
+                        transitionDuration: const Duration(seconds: 0),
+                        reverseTransitionDuration: const Duration(seconds: 0),
+                      ));
+                },
+                child: const Text("Open QR Scanner")),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class QRScannerPage extends StatefulWidget {
+  const QRScannerPage({Key? key}) : super(key: key);
+
+  @override
+  QRScannerPageState createState() => QRScannerPageState();
+}
+
+class QRScannerPageState extends State<QRScannerPage> {
+  String? currentCode;
+
+  QRScannerPageState({Key? key}) : super();
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+        body: Stack(
+      children: [
+        Positioned(
+            top: 0,
+            bottom: 0,
+            left: 0,
+            right: 0,
+            child: QRScannerZxingView(
+                marginPct: 10,
+                onDetect: (result) {
+                  if (currentCode == null) {
+                    setState(() {
+                      currentCode = result;
+                    });
+                  }
+                })),
+        const Positioned(
+            top: 0,
+            bottom: 0,
+            left: 0,
+            right: 0,
+            child: CutoutOverlay(
+              marginPct: 5,
+            )),
+        Positioned(
+          bottom: 0,
+          left: 0,
+          right: 0,
+          child: Padding(
+            padding: const EdgeInsets.all(8.0),
+            child: Row(
+              mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+              mainAxisSize: MainAxisSize.max,
+              children: [
+                ElevatedButton(
+                  onPressed: () {
+                    Navigator.of(context).pop();
+                  },
+                  child: const Text('Back'),
+                ),
+                ElevatedButton.icon(
+                  icon: const Icon(Icons.refresh),
+                  label: const Text("Again"),
+                  onPressed: () {
+                    setState(() {
+                      currentCode = null;
+                    });
+                  },
+                ),
+              ],
+            ),
+          ),
+        ),
+        Positioned(
+          bottom: 80,
+          left: 0,
+          right: 0,
+          child: Card(
+              margin: const EdgeInsets.all(20),
+              elevation: 100,
+              child: Padding(
+                padding: const EdgeInsets.all(20),
+                child: Column(
+                  children: [
+                    const Text("Found QR code:"),
+                    Text(currentCode ?? "NO CODE DETECTED"),
+                  ],
+                ),
+              )),
+        ),
+        Positioned(
+          top: 50,
+          left: 0,
+          right: 0,
+          child: Card(
+              margin: const EdgeInsets.all(20),
+              elevation: 100,
+              child: Padding(
+                padding: const EdgeInsets.all(20),
+                child: Column(
+                  children: const [
+                    Text("QR scanner example"),
+                  ],
+                ),
+              )),
+        )
+      ],
+    ));
+  }
+}

android/flutter_plugins/qrscanner_zxing/example/pubspec.lock

@@ -0,0 +1,182 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  async:
+    dependency: transitive
+    description:
+      name: async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.8.2"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.1"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.16.0"
+  cupertino_icons:
+    dependency: "direct main"
+    description:
+      name: cupertino_icons
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.4"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.0"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_lints:
+    dependency: "direct dev"
+    description:
+      name: flutter_lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.1"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  lints:
+    dependency: transitive
+    description:
+      name: lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.12.11"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.4"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.7.0"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.8.1"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.2"
+  qrscanner_zxing:
+    dependency: "direct main"
+    description:
+      path: ".."
+      relative: true
+    source: path
+    version: "1.0.0"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.99"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.8.2"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.10.0"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.4.9"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.2"
+sdks:
+  dart: ">=2.17.0-266.1.beta <3.0.0"
+  flutter: ">=2.5.0"

android/flutter_plugins/qrscanner_zxing/example/pubspec.yaml

@@ -0,0 +1,24 @@
+name: qrscanner_zxing_example
+description: Demonstrates how to use the qrscanner_zxing plugin.
+
+publish_to: 'none' # Remove this line if you wish to publish to pub.dev
+
+environment:
+  sdk: ">=2.17.0-266.1.beta <3.0.0"
+
+dependencies:
+  flutter:
+    sdk: flutter
+
+  qrscanner_zxing:
+    path: ../
+
+  cupertino_icons: ^1.0.2
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+  flutter_lints: ^2.0.0
+
+flutter:
+  uses-material-design: true

android/flutter_plugins/qrscanner_zxing/lib/qrscanner_zxing.dart

@@ -0,0 +1,7 @@
+import 'qrscanner_zxing_platform_interface.dart';
+
+class QRScannerZxing {
+  Future<String?> getPlatformVersion() {
+    return QRScannerZxingPlatform.instance.getPlatformVersion();
+  }
+}

android/flutter_plugins/qrscanner_zxing/lib/qrscanner_zxing_method_channel.dart

@@ -0,0 +1,18 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter/services.dart';
+
+import 'qrscanner_zxing_platform_interface.dart';
+
+/// An implementation of [QRScannerZxingPlatform] that uses method channels.
+class MethodChannelQRScannerZxing extends QRScannerZxingPlatform {
+  /// The method channel used to interact with the native platform.
+  @visibleForTesting
+  final methodChannel = const MethodChannel('qrscanner_zxing');
+
+  @override
+  Future<String?> getPlatformVersion() async {
+    final version =
+        await methodChannel.invokeMethod<String>('getPlatformVersion');
+    return version;
+  }
+}

android/flutter_plugins/qrscanner_zxing/lib/qrscanner_zxing_platform_interface.dart

@@ -0,0 +1,29 @@
+import 'package:plugin_platform_interface/plugin_platform_interface.dart';
+
+import 'qrscanner_zxing_method_channel.dart';
+
+abstract class QRScannerZxingPlatform extends PlatformInterface {
+  /// Constructs a QRScannerZxingPlatform.
+  QRScannerZxingPlatform() : super(token: _token);
+
+  static final Object _token = Object();
+
+  static QRScannerZxingPlatform _instance = MethodChannelQRScannerZxing();
+
+  /// The default instance of [QRScannerZxingPlatform] to use.
+  ///
+  /// Defaults to [MethodChannelQRScannerZxing].
+  static QRScannerZxingPlatform get instance => _instance;
+
+  /// Platform-specific implementations should set this with their own
+  /// platform-specific class that extends [QRScannerZxingPlatform] when
+  /// they register themselves.
+  static set instance(QRScannerZxingPlatform instance) {
+    PlatformInterface.verifyToken(instance, _token);
+    _instance = instance;
+  }
+
+  Future<String?> getPlatformVersion() {
+    throw UnimplementedError('platformVersion() has not been implemented.');
+  }
+}

android/flutter_plugins/qrscanner_zxing/lib/qrscanner_zxing_view.dart

@@ -0,0 +1,80 @@
+import 'dart:convert';
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/gestures.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
+import 'package:flutter/services.dart';
+
+class QRScannerZxingView extends StatefulWidget {
+  final int marginPct;
+  final Function(String rawData) onDetect;
+
+  const QRScannerZxingView(
+      {Key? key, required this.marginPct, required this.onDetect})
+      : super(key: key);
+
+  @override
+  QRScannerZxingViewState createState() => QRScannerZxingViewState();
+}
+
+class QRScannerZxingViewState extends State<QRScannerZxingView> {
+  final MethodChannel channel = const MethodChannel(
+      "com.yubico.authenticator.flutter_plugins.qr_scanner_channel");
+
+  QRScannerZxingViewState() : super() {
+    channel.setMethodCallHandler((call) async {
+      try {
+        switch (call.method) {
+          case "codeFound":
+            var arguments = jsonDecode(call.arguments);
+            var rawValue = arguments["value"];
+            widget.onDetect(rawValue);
+            return;
+        }
+      } catch (e) {
+        if (kDebugMode) {
+          debugPrint("Exception in onDetect: $e}");
+        }
+      }
+    });
+  }
+
+  @override
+  void dispose() {
+    super.dispose();
+    channel.setMethodCallHandler(null);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    const String viewType = 'qrScannerNativeView';
+    Map<String, dynamic> creationParams = <String, dynamic>{
+      "margin": widget.marginPct
+    };
+    return PlatformViewLink(
+        viewType: viewType,
+        surfaceFactory:
+            (BuildContext context, PlatformViewController controller) {
+          return AndroidViewSurface(
+            controller: controller as AndroidViewController,
+            gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
+            hitTestBehavior: PlatformViewHitTestBehavior.opaque,
+          );
+        },
+        onCreatePlatformView: (PlatformViewCreationParams params) {
+          return PlatformViewsService.initExpensiveAndroidView(
+            id: params.id,
+            viewType: viewType,
+            layoutDirection: TextDirection.ltr,
+            creationParams: creationParams,
+            creationParamsCodec: const StandardMessageCodec(),
+            onFocus: () {
+              params.onFocusChanged(true);
+            },
+          )
+            ..addOnPlatformViewCreatedListener(params.onPlatformViewCreated)
+            ..create();
+        });
+  }
+}

android/flutter_plugins/qrscanner_zxing/pubspec.yaml

@@ -0,0 +1,25 @@
+name: qrscanner_zxing
+description: Android-only QR Scanner plugin based on zxing and CameraX API's
+version: 1.0.0
+homepage:
+
+environment:
+  sdk: ">=2.17.0-266.1.beta <3.0.0"
+  flutter: ">=2.5.0"
+
+dependencies:
+  flutter:
+    sdk: flutter
+  plugin_platform_interface: ^2.0.2
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+  flutter_lints: ^2.0.0
+
+flutter:
+  plugin:
+    platforms:
+      android:
+        package: com.yubico.authenticator.flutter_plugins.qrscanner_zxing
+        pluginClass: QRScannerZxingPlugin

android/flutter_plugins/qrscanner_zxing/test/qrscanner_zxing_method_channel_test.dart

@@ -0,0 +1,24 @@
+import 'package:flutter/services.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:qrscanner_zxing/qrscanner_zxing_method_channel.dart';
+
+void main() {
+  MethodChannelQRScannerZxing platform = MethodChannelQRScannerZxing();
+  const MethodChannel channel = MethodChannel('qrscanner_zxing');
+
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  setUp(() {
+    channel.setMockMethodCallHandler((MethodCall methodCall) async {
+      return '42';
+    });
+  });
+
+  tearDown(() {
+    channel.setMockMethodCallHandler(null);
+  });
+
+  test('getPlatformVersion', () async {
+    expect(await platform.getPlatformVersion(), '42');
+  });
+}

android/flutter_plugins/qrscanner_zxing/test/qrscanner_zxing_test.dart

@@ -0,0 +1,29 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:plugin_platform_interface/plugin_platform_interface.dart';
+import 'package:qrscanner_zxing/qrscanner_zxing.dart';
+import 'package:qrscanner_zxing/qrscanner_zxing_method_channel.dart';
+import 'package:qrscanner_zxing/qrscanner_zxing_platform_interface.dart';
+
+class MockQRScannerZxingPlatform
+    with MockPlatformInterfaceMixin
+    implements QRScannerZxingPlatform {
+  @override
+  Future<String?> getPlatformVersion() => Future.value('42');
+}
+
+void main() {
+  final QRScannerZxingPlatform initialPlatform =
+      QRScannerZxingPlatform.instance;
+
+  test('$MethodChannelQRScannerZxing is the default instance', () {
+    expect(initialPlatform, isInstanceOf<MethodChannelQRScannerZxing>());
+  });
+
+  test('getPlatformVersion', () async {
+    QRScannerZxing qrscannerZxingPlugin = QRScannerZxing();
+    MockQRScannerZxingPlatform fakePlatform = MockQRScannerZxingPlatform();
+    QRScannerZxingPlatform.instance = fakePlatform;
+
+    expect(await qrscannerZxingPlugin.getPlatformVersion(), '42');
+  });
+}

lib/android/qr_scanner/qr_scanner_provider.dart

@@ -12,8 +12,10 @@ class AndroidQrScanner implements QrScanner {
   Future<String> scanQr([String? _]) async {
     var code =
         await Navigator.of(NavigationService.navigatorKey.currentContext!)
-            .push(MaterialPageRoute(
-      builder: (context) => const QrScannerView(),
+            .push(PageRouteBuilder(
+      pageBuilder: (_, __, ___) => const QrScannerView(),
+      transitionDuration: const Duration(seconds: 0),
+      reverseTransitionDuration: const Duration(seconds: 0),
     ));
 
     return code;

lib/android/qr_scanner/qr_scanner_view.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:mobile_scanner/mobile_scanner.dart';
+import 'package:qrscanner_zxing/qrscanner_zxing_view.dart';
 
 import '../../app/navigation_service.dart';
 import '../../oath/models.dart';
@@ -29,13 +29,11 @@ class OverlayClipper extends CustomClipper<Path> {
 }
 
 class MobileScannerWrapper extends StatelessWidget {
-  final MobileScannerController controller;
-  final Function(Barcode barcode, MobileScannerArguments? args)? onDetect;
+  final Function(String) onDetect;
   final _ScanStatus status;
 
   const MobileScannerWrapper({
     Key? key,
-    required this.controller,
     required this.onDetect,
     required this.status,
   }) : super(key: key);
@@ -55,11 +53,10 @@ class MobileScannerWrapper extends StatelessWidget {
         height: size.width - 38);
 
     return Stack(children: [
-      MobileScanner(
-          controller: controller,
-          allowDuplicates: true,
-          onDetect: (barcode, args) {
-            onDetect?.call(barcode, args);
+      QRScannerZxingView(
+          marginPct: 20,
+          onDetect: (barCode) {
+            onDetect.call(barCode);
           }),
       ClipPath(
           clipper: OverlayClipper(),
@@ -108,9 +105,6 @@ class _QrScannerViewState extends State<QrScannerView> {
   CredentialData? _credentialData;
   _ScanStatus _status = _ScanStatus.looking;
 
-  final MobileScannerController _controller =
-      MobileScannerController(facing: CameraFacing.back, torchEnabled: false);
-
   void setError() {
     _credentialData = null;
     _scannedString = null;
@@ -129,17 +123,17 @@ class _QrScannerViewState extends State<QrScannerView> {
     });
   }
 
-  void handleResult(String? code, MobileScannerArguments? args) {
+  void handleResult(String barCode) {
     if (_status != _ScanStatus.looking) {
       // on success and error ignore reported codes
       return;
     }
     setState(() {
-      if (code != null) {
+      if (barCode.isNotEmpty) {
         try {
-          var parsedCredential = CredentialData.fromUri(Uri.parse(code));
+          var parsedCredential = CredentialData.fromUri(Uri.parse(barCode));
           _credentialData = parsedCredential;
-          _scannedString = code;
+          _scannedString = barCode;
           _status = _ScanStatus.success;
 
           Future.delayed(const Duration(milliseconds: 800), () {
@@ -175,10 +169,8 @@ class _QrScannerViewState extends State<QrScannerView> {
             ),
             body: Stack(children: [
               MobileScannerWrapper(
-                controller: _controller,
                 status: _status,
-                onDetect: (barcode, args) =>
-                    handleResult(barcode.rawValue, args),
+                onDetect: (scannedData) => handleResult(scannedData),
               ),
               Padding(
                   padding:

pubspec.lock

@@ -352,15 +352,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.1"
-  mobile_scanner:
-    dependency: "direct main"
-    description:
-      path: "."
-      ref: just-android
-      resolved-ref: b5473703e1e9c845dfedf129d394d0535367c9e6
-      url: "https://github.com/AdamVe/mobile_scanner.git"
-    source: git
-    version: "1.0.0"
   package_config:
     dependency: transitive
     description:
@@ -445,6 +436,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.2.0"
+  qrscanner_zxing:
+    dependency: "direct main"
+    description:
+      path: "android/flutter_plugins/qrscanner_zxing"
+      relative: true
+    source: path
+    version: "1.0.0"
   riverpod:
     dependency: transitive
     description:
@@ -661,5 +659,5 @@ packages:
     source: hosted
     version: "3.1.0"
 sdks:
-  dart: ">=2.17.0-0 <3.0.0"
+  dart: ">=2.17.0-266.1.beta <3.0.0"
   flutter: ">=2.8.0"

pubspec.yaml

@@ -42,10 +42,8 @@ dependencies:
   json_annotation: ^4.4.0
   freezed_annotation: ^1.0.0
   window_manager: ^0.2.0
-  mobile_scanner:
-    git:
-      url: https://github.com/AdamVe/mobile_scanner.git
-      ref: just-android
+  qrscanner_zxing:
+    path: android/flutter_plugins/qrscanner_zxing
   desktop_drop: ^0.3.3
 
 dev_dependencies: