[FSSDK-10374] chore: migration of flutter's gradle plugins

android/build.gradle

@@ -1,24 +1,17 @@
+plugins {
+    id "com.android.library"
+}
+
 group 'com.optimizely.optimizely_flutter_sdk'
 version '1.0'
 
-buildscript {
-
-    def version_name = System.getenv('TRAVIS_TAG')
-    if (version_name != null) {
-        rootProject.ext.version_name = version_name
-    } else {
-        rootProject.ext.version_name = 'debugVersion'
-    }
-
-    repositories {
-        google()
-        mavenCentral()
-    }
-
-    dependencies {
-        classpath 'com.android.tools.build:gradle:7.2.1'
-    }
+def version_name = System.getenv('TRAVIS_TAG')
+if (version_name != null) {
+    rootProject.ext.version_name = version_name
+} else {
+    rootProject.ext.version_name = 'debugVersion'
 }
+
 configurations {
     all*.exclude group: 'com.google.guava', module: 'listenablefuture'
 }
@@ -29,7 +22,6 @@ rootProject.allprojects {
     }
 }
 
-apply plugin: 'com.android.library'
 
 ext {
     compile_sdk_version = 32
@@ -71,7 +63,6 @@ android {
 
 }
 
-
 dependencies {
     implementation 'androidx.multidex:multidex:2.0.0'
     implementation 'com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava'

example/android/app/build.gradle

@@ -1,3 +1,10 @@
+
+plugins {
+    id "com.android.application"
+    id "org.jetbrains.kotlin.android"
+    id "dev.flutter.flutter-gradle-plugin"
+}
+
 def localProperties = new Properties()
 def localPropertiesFile = rootProject.file('local.properties')
 if (localPropertiesFile.exists()) {
@@ -6,11 +13,6 @@ 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'
@@ -21,10 +23,6 @@ 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 32
     ndkVersion flutter.ndkVersion
@@ -57,3 +55,7 @@ android {
 flutter {
     source '../..'
 }
+
+dependencies {
+    implementation 'com.android.support:multidex:1.0.3'
+}

example/android/build.gradle

@@ -1,18 +1,8 @@
-buildscript {
-    ext.kotlin_version = '1.6.10'
-    repositories {
-        google()
-        mavenCentral()
-    }
 
-    dependencies {
-        classpath 'com.android.tools.build:gradle:7.2.1'
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-    }
-}
 ext {
     android_sdk_version = "4.0.0"
 }
+
 allprojects {
     repositories {
         google()
@@ -28,6 +18,6 @@ subprojects {
     project.evaluationDependsOn(':app')
 }
 
-task clean(type: Delete) {
+tasks.register("clean", Delete) {
     delete rootProject.buildDir
 }

example/android/settings.gradle

@@ -1,11 +1,34 @@
-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()
+    includeBuild("${settings.ext.flutterSdkPath}/packages/flutter_tools/gradle")
 
-def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
-def properties = new Properties()
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+    resolutionStrategy {
+        eachPlugin {
+            if (requested.id.namespace == 'dev.flutter') {
+                useModule("dev.flutter:${requested.id.name}:${requested.version}")
+            }
+        }
+    }
+}
 
-assert localPropertiesFile.exists()
-localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
+plugins {
+    id "dev.flutter.flutter-plugin-loader" version "1.0.0"
+    id "com.android.application" version "7.2.1" apply false
+    id "org.jetbrains.kotlin.android" version "1.6.10" apply false
+}
+
+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"