grade update

coinlib_flutter/android/build.gradle

@@ -4,30 +4,35 @@ group 'com.example.coinlib_flutter'
 version '1.0'
 
 buildscript {
+    ext.kotlin_version = "1.8.22"
     repositories {
         google()
         mavenCentral()
     }
 
     dependencies {
-        // The Android Gradle Plugin knows how to build native code with the NDK.
-        classpath 'com.android.tools.build:gradle:7.2.0'
+        classpath("com.android.tools.build:gradle:8.1.0")
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version")
     }
 }
 
-rootProject.allprojects {
+allprojects {
     repositories {
         google()
         mavenCentral()
     }
 }
 
-apply plugin: 'com.android.library'
+apply plugin: "com.android.library"
+apply plugin: "kotlin-android"
 
 android {
+    if (project.android.hasProperty("namespace")) {
+        namespace = "com.example.coinlib_flutter"
+    }
     // Bumping the plugin compileSdkVersion requires all clients of this plugin
     // to bump the version in their app.
-    compileSdkVersion 31
+    compileSdk = 34
 
     // Bumping the plugin ndkVersion requires all clients of this plugin to bump
     // the version in their app and to download a newer version of the NDK.
@@ -52,8 +57,13 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_1_8
+    }
+
     defaultConfig {
-        minSdkVersion 16
+        minSdk 21
         externalNativeBuild {
             cmake {
                 // Final step in the Android build process
@@ -66,6 +76,8 @@ android {
         main {
             jniLibs.srcDirs = ['src/main/jniLibs']
         }
+        main.java.srcDirs += "src/main/kotlin"
+        test.java.srcDirs += "src/test/kotlin"
     }
 
 }