Migration to a flutter 3 android compatible config.

graddle bump from version 6.7 to 8.5
kotlin bump from version 1.6.21 to 1.9.10
permission_handler upgrade from 10.2.0 to 11.1.0

Author: MonsieurRz

example/android/app/build.gradle

@@ -1,35 +1,23 @@
-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'
+plugins {
+    id "com.android.application"
+    id "kotlin-android"
+    id "dev.flutter.flutter-gradle-plugin"
 }
 
-apply plugin: 'com.android.application'
-apply plugin: 'kotlin-android'
-apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
-
 android {
+    namespace "com.example.fresh_example"
     // Any value starting with "flutter." get its value from
     // the Flutter Gradle plugin.
     compileSdk flutter.compileSdkVersion
 
+     compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+
+    kotlinOptions {
+        jvmTarget = '17'
+    }
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
@@ -38,11 +26,11 @@ android {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "com.example.fresh_example"
         // You can update the following value to match your application needs.
-        minSdkVersion flutter.minSdkVersion
-        targetSdkVersion flutter.targetSdkVersion
+        minSdk flutter.minSdkVersion
+        targetSdk flutter.targetSdkVersion
         // You can set these values in the property declaration or use a variable
-        versionCode flutterVersionCode.toInteger()
-        versionName flutterVersionName
+        versionCode flutter.versionCode.toInteger()
+        versionName flutter.versionName
     }
 
     buildTypes {
@@ -57,7 +45,3 @@ android {
 flutter {
     source '../..'
 }
-
-dependencies {
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-}

example/android/build.gradle

@@ -1,20 +1,7 @@
-buildscript {
-    ext.kotlin_version = '1.6.21'
-    repositories {
-        google()
-        jcenter()
-    }
-
-    dependencies {
-        classpath 'com.android.tools.build:gradle:7.4.1'
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-    }
-}
-
 allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 }
 

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

@@ -1,6 +1,7 @@
-#Fri Jun 23 08:50:38 CEST 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.1-all.zip

example/android/settings.gradle

@@ -1,11 +1,26 @@
-include ':app'
 
-def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
-def properties = new Properties()
+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
+    }()
 
-assert localPropertiesFile.exists()
-localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
+    includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")
 
-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"
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+plugins {
+    id "dev.flutter.flutter-plugin-loader" version "1.0.0"
+    id "com.android.application" version "8.2.1" apply false
+    id "org.jetbrains.kotlin.android" version "1.9.10" apply false
+}
+
+include ":app"

example/pubspec.yaml

@@ -18,7 +18,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: '>=3.2.0 <4.0.0'
 
 dependencies:
   flutter:
@@ -31,7 +31,7 @@ dependencies:
 
   c2bluetooth:
     path: ../
-  permission_handler: ^10.2.0
+  permission_handler: ^11.1.0
 
 dev_dependencies:
   flutter_test:

pubspec.yaml

@@ -4,7 +4,7 @@ version: 0.1.6
 repository: https://github.com/CrewLAB/c2bluetooth
 
 environment:
-  sdk: ">=2.15.0 <3.0.0"
+  sdk: '>=3.2.0 <4.0.0'
   flutter: ">=1.17.0"
 
 dependencies: