chore: update Android Gradle build to support the newer Flutter SDK

- Upgraded Gradle to 8.12.1
- Changed compile and target compatibility to Java 17
- Set `compileSdkVersion` to use Flutter's value.
- Added compiler flags for unchecked and deprecation warnings.

Author: ttypic

.github/workflows/flutter_integration.yaml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       matrix:
         device: # Device names must be shown in `xcrun simctl list devices`
-          - 'iPhone 15' # we are not specifying the iOS version as it tends to change
+          - 'iPhone 16' # we are not specifying the iOS version as it tends to change
       fail-fast: false
     runs-on: macos-latest
     steps:
@@ -33,7 +33,10 @@ jobs:
         timeout-minutes: 30
         run: |
           flutter pub get
-          cd test_integration && flutter drive
+          cd test_integration/ios
+          pod install
+          cd ..
+          flutter drive
 
   android:
     runs-on: ubuntu-latest

android/build.gradle

@@ -1,14 +1,16 @@
 group 'io.ably.flutter.plugin'
-version '1.0'
+// Use the snapshot suffix to show that build artifacts are not shared.
+// This Gradle file is used by Flutter to build itself.
+version '1.0-SNAPSHOT'
 
 buildscript {
     repositories {
         google()
-        mavenCentral() // for firebase-messaging
+        mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.4.0'
+        classpath 'com.android.tools.build:gradle:8.12.1'
     }
 }
 
@@ -33,29 +35,20 @@ dependencies {
 }
 
 android {
-    compileSdkVersion 34
+    compileSdkVersion flutter.compileSdkVersion
 
     // Conditional for compatibility with AGP <4.2.
     if (project.android.hasProperty("namespace")) {
         namespace 'io.ably.flutter.plugin'
     }
 
-    // Require Java language level 8 so we can use Method References (used with Lambdas)
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
-
-        // Flag to enable Java 8 language APIs while supporting to older SDK Versions
-        coreLibraryDesugaringEnabled true
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
     }
 
     defaultConfig {
         minSdkVersion 19
-
-        // Required when setting minSdkVersion to 20 or lower so we can use
-        // the Java 8 language APIs as mentioned here:
-        // https://developer.android.com/studio/write/java8-support#library-desugaring
-        multiDexEnabled true
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     lintOptions {
@@ -66,4 +59,10 @@ android {
     }
 }
 
+gradle.projectsEvaluated {
+    tasks.withType(JavaCompile) {
+        options.compilerArgs << "-Xlint:unchecked" << "-Xlint:deprecation"
+    }
+}
+
 apply from: file("./ably-agent.gradle")

example/android/settings.gradle

@@ -19,7 +19,7 @@ pluginManagement {
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
     id "com.android.application" version "8.7.0" apply false
-    id "org.jetbrains.kotlin.android" version "1.8.22" apply false
+    id "org.jetbrains.kotlin.android" version "2.2.20" apply false
     id "com.google.gms.google-services" version "4.3.10" apply false
 }
 

test_integration/android/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
 networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

test_integration/android/settings.gradle

@@ -18,8 +18,9 @@ pluginManagement {
 
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "7.4.0" apply false
-    id "org.jetbrains.kotlin.android" version "1.7.10" apply false
+    id "com.android.application" version "8.7.0" apply false
+    id "org.jetbrains.kotlin.android" version "2.2.20" apply false
+    id "com.google.gms.google-services" version "4.3.10" apply false
 }
 
 include ":app"