update example app Gradle settings

@@ -48,6 +48,18 @@ android {
     defaultConfig {
         minSdkVersion 21
     }
+
+    testOptions {
+        unitTests.all {
+            useJUnitPlatform()
+
+            testLogging {
+                events "passed", "skipped", "failed", "standardOut", "standardError"
+                outputs.upToDateWhen {false}
+                showStandardStreams = true
+            }
+        }
+    }
 }
 
 dependencies {
@@ -69,15 +81,3 @@ dependencies {
     testImplementation 'org.jetbrains.kotlin:kotlin-test'
     testImplementation 'org.mockito:mockito-core:5.0.0'    
 }
-
-testOptions {
-    unitTests.all {
-        useJUnitPlatform()
-
-        testLogging {
-            events "passed", "skipped", "failed", "standardOut", "standardError"
-            outputs.upToDateWhen {false}
-            showStandardStreams = true
-        }
-    }
-}

+plugins {
+    id "com.android.application"
+    id "kotlin-android"
+    id "dev.flutter.flutter-gradle-plugin"
+}
+
 def localProperties = new Properties()
 def localPropertiesFile = rootProject.file('local.properties')
 if (localPropertiesFile.exists()) {
@@ -6,11 +12,6 @@ if (localPropertiesFile.exists()) {
     }
 }
 
-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'
@@ -21,12 +22,10 @@ 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 {
+    namespace "dev.steenbakker.mobile_scanner_example"
     compileSdkVersion 33
+    ndkVersion flutter.ndkVersion
 
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
@@ -57,7 +56,6 @@ android {
             signingConfig signingConfigs.debug
         }
     }
-    namespace 'dev.steenbakker.mobile_scanner_example'
 }
 
 flutter {

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