diff --git a/analysis_options.yaml b/analysis_options.yaml
new file mode 100644
index 0000000..a5744c1
--- /dev/null
+++ b/analysis_options.yaml
@@ -0,0 +1,4 @@
+include: package:flutter_lints/flutter.yaml
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options
diff --git a/android/.gitignore b/android/.gitignore
new file mode 100644
index 0000000..161bdcd
--- /dev/null
+++ b/android/.gitignore
@@ -0,0 +1,9 @@
+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+.cxx
diff --git a/android/build.gradle b/android/build.gradle
new file mode 100644
index 0000000..47bca7f
--- /dev/null
+++ b/android/build.gradle
@@ -0,0 +1,75 @@
+group 'soko.ekibun.flutter_qjs'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    ext.kotlin_version = '1.7.10'
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:8.0.1'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+
+android {
+    if (project.android.hasProperty("namespace")) {
+        namespace 'soko.ekibun.flutter_qjs'
+    }
+
+    compileSdk 34
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    externalNativeBuild {
+        cmake {
+            path "src/main/cxx/CMakeLists.txt"
+            version "3.10.2"
+        }
+    }
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+        test.java.srcDirs += 'src/test/kotlin'
+    }
+
+    defaultConfig {
+        minSdkVersion 19
+    }
+
+    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
+            }
+        }
+    }
+}
diff --git a/android/settings.gradle b/android/settings.gradle
new file mode 100644
index 0000000..4acab51
--- /dev/null
+++ b/android/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'flutter_qjs'
diff --git a/android/src/main/AndroidManifest.xml b/android/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..6cfef06
--- /dev/null
+++ b/android/src/main/AndroidManifest.xml
@@ -0,0 +1,3 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+  package="soko.ekibun.flutter_qjs">
+</manifest>
diff --git a/android/src/main/kotlin/soko/ekibun/flutter_qjs/FlutterQjsPlugin.kt b/android/src/main/kotlin/soko/ekibun/flutter_qjs/FlutterQjsPlugin.kt
new file mode 100644
index 0000000..e01686c
--- /dev/null
+++ b/android/src/main/kotlin/soko/ekibun/flutter_qjs/FlutterQjsPlugin.kt
@@ -0,0 +1,35 @@
+package soko.ekibun.flutter_qjs
+
+import androidx.annotation.NonNull
+
+import io.flutter.embedding.engine.plugins.FlutterPlugin
+import io.flutter.plugin.common.MethodCall
+import io.flutter.plugin.common.MethodChannel
+import io.flutter.plugin.common.MethodChannel.MethodCallHandler
+import io.flutter.plugin.common.MethodChannel.Result
+
+/** FlutterQjsPlugin */
+class FlutterQjsPlugin: FlutterPlugin, MethodCallHandler {
+  /// The MethodChannel that will the communication between Flutter and native Android
+  ///
+  /// This local reference serves to register the plugin with the Flutter Engine and unregister it
+  /// when the Flutter Engine is detached from the Activity
+  private lateinit var channel : MethodChannel
+
+  override fun onAttachedToEngine(flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
+    channel = MethodChannel(flutterPluginBinding.binaryMessenger, "flutter_qjs")
+    channel.setMethodCallHandler(this)
+  }
+
+  override fun onMethodCall(call: MethodCall, result: Result) {
+    if (call.method == "getPlatformVersion") {
+      result.success("Android ${android.os.Build.VERSION.RELEASE}")
+    } else {
+      result.notImplemented()
+    }
+  }
+
+  override fun onDetachedFromEngine(binding: FlutterPlugin.FlutterPluginBinding) {
+    channel.setMethodCallHandler(null)
+  }
+}
diff --git a/android/src/test/kotlin/soko/ekibun/flutter_qjs/FlutterQjsPluginTest.kt b/android/src/test/kotlin/soko/ekibun/flutter_qjs/FlutterQjsPluginTest.kt
new file mode 100644
index 0000000..9f9c88a
--- /dev/null
+++ b/android/src/test/kotlin/soko/ekibun/flutter_qjs/FlutterQjsPluginTest.kt
@@ -0,0 +1,27 @@
+package soko.ekibun.flutter_qjs
+
+import io.flutter.plugin.common.MethodCall
+import io.flutter.plugin.common.MethodChannel
+import kotlin.test.Test
+import org.mockito.Mockito
+
+/*
+ * This demonstrates a simple unit test of the Kotlin portion of this plugin's implementation.
+ *
+ * Once you have built the plugin's example app, you can run these tests from the command
+ * line by running `./gradlew testDebugUnitTest` in the `example/android/` directory, or
+ * you can run them directly from IDEs that support JUnit such as Android Studio.
+ */
+
+internal class FlutterQjsPluginTest {
+  @Test
+  fun onMethodCall_getPlatformVersion_returnsExpectedValue() {
+    val plugin = FlutterQjsPlugin()
+
+    val call = MethodCall("getPlatformVersion", null)
+    val mockResult: MethodChannel.Result = Mockito.mock(MethodChannel.Result::class.java)
+    plugin.onMethodCall(call, mockResult)
+
+    Mockito.verify(mockResult).success("Android " + android.os.Build.VERSION.RELEASE)
+  }
+}
diff --git a/example/ios/RunnerTests/RunnerTests.swift b/example/ios/RunnerTests/RunnerTests.swift
new file mode 100644
index 0000000..8aaf3b5
--- /dev/null
+++ b/example/ios/RunnerTests/RunnerTests.swift
@@ -0,0 +1,26 @@
+import Flutter
+import UIKit
+import XCTest
+
+@testable import flutter_qjs
+
+// This demonstrates a simple unit test of the Swift portion of this plugin's implementation.
+//
+// See https://developer.apple.com/documentation/xctest for more information about using XCTest.
+
+class RunnerTests: XCTestCase {
+
+  func testGetPlatformVersion() {
+    let plugin = FlutterQjsPlugin()
+
+    let call = FlutterMethodCall(methodName: "getPlatformVersion", arguments: [])
+
+    let resultExpectation = expectation(description: "result block must be called.")
+    plugin.handle(call) { result in
+      XCTAssertEqual(result as! String, "iOS " + UIDevice.current.systemVersion)
+      resultExpectation.fulfill()
+    }
+    waitForExpectations(timeout: 1)
+  }
+
+}
diff --git a/example/linux/flutter/generated_plugin_registrant.cc b/example/linux/flutter/generated_plugin_registrant.cc
index 5042a74..86a66cb 100644
--- a/example/linux/flutter/generated_plugin_registrant.cc
+++ b/example/linux/flutter/generated_plugin_registrant.cc
@@ -7,13 +7,9 @@
 #include "generated_plugin_registrant.h"
 
 #include <flutter_qjs/flutter_qjs_plugin.h>
-#include <sqlite3_flutter_libs/sqlite3_flutter_libs_plugin.h>
 
 void fl_register_plugins(FlPluginRegistry* registry) {
   g_autoptr(FlPluginRegistrar) flutter_qjs_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "FlutterQjsPlugin");
   flutter_qjs_plugin_register_with_registrar(flutter_qjs_registrar);
-  g_autoptr(FlPluginRegistrar) sqlite3_flutter_libs_registrar =
-      fl_plugin_registry_get_registrar_for_plugin(registry, "Sqlite3FlutterLibsPlugin");
-  sqlite3_flutter_libs_plugin_register_with_registrar(sqlite3_flutter_libs_registrar);
 }
diff --git a/example/linux/flutter/generated_plugins.cmake b/example/linux/flutter/generated_plugins.cmake
index 6749e87..5929dac 100644
--- a/example/linux/flutter/generated_plugins.cmake
+++ b/example/linux/flutter/generated_plugins.cmake
@@ -4,7 +4,6 @@
 
 list(APPEND FLUTTER_PLUGIN_LIST
   flutter_qjs
-  sqlite3_flutter_libs
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST
diff --git a/example/macos/Flutter/GeneratedPluginRegistrant.swift b/example/macos/Flutter/GeneratedPluginRegistrant.swift
index 4d462c2..d058a0d 100644
--- a/example/macos/Flutter/GeneratedPluginRegistrant.swift
+++ b/example/macos/Flutter/GeneratedPluginRegistrant.swift
@@ -6,9 +6,7 @@ import FlutterMacOS
 import Foundation
 
 import flutter_qjs
-import sqlite3_flutter_libs
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   FlutterQjsPlugin.register(with: registry.registrar(forPlugin: "FlutterQjsPlugin"))
-  Sqlite3FlutterLibsPlugin.register(with: registry.registrar(forPlugin: "Sqlite3FlutterLibsPlugin"))
 }
diff --git a/example/macos/RunnerTests/RunnerTests.swift b/example/macos/RunnerTests/RunnerTests.swift
new file mode 100644
index 0000000..d5c0920
--- /dev/null
+++ b/example/macos/RunnerTests/RunnerTests.swift
@@ -0,0 +1,27 @@
+import FlutterMacOS
+import Cocoa
+import XCTest
+
+@testable import flutter_qjs
+
+// This demonstrates a simple unit test of the Swift portion of this plugin's implementation.
+//
+// See https://developer.apple.com/documentation/xctest for more information about using XCTest.
+
+class RunnerTests: XCTestCase {
+
+  func testGetPlatformVersion() {
+    let plugin = FlutterQjsPlugin()
+
+    let call = FlutterMethodCall(methodName: "getPlatformVersion", arguments: [])
+
+    let resultExpectation = expectation(description: "result block must be called.")
+    plugin.handle(call) { result in
+      XCTAssertEqual(result as! String,
+                     "macOS " + ProcessInfo.processInfo.operatingSystemVersionString)
+      resultExpectation.fulfill()
+    }
+    waitForExpectations(timeout: 1)
+  }
+
+}
diff --git a/example/pubspec.lock b/example/pubspec.lock
index 8ece711..224f900 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -90,14 +90,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.7.0"
-  js:
-    dependency: transitive
-    description:
-      name: js
-      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.6.7"
   leak_tracker:
     dependency: transitive
     description:
@@ -167,22 +159,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.10.0"
-  sqlite3:
-    dependency: "direct main"
-    description:
-      name: sqlite3
-      sha256: "1abbeb84bf2b1a10e5e1138c913123c8aa9d83cd64e5f9a0dd847b3c83063202"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.4.2"
-  sqlite3_flutter_libs:
-    dependency: "direct main"
-    description:
-      name: sqlite3_flutter_libs
-      sha256: d6c31c8511c441d1f12f20b607343df1afe4eddf24a1cf85021677c8eea26060
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.5.20"
   stack_trace:
     dependency: transitive
     description:
@@ -240,5 +216,5 @@ packages:
     source: hosted
     version: "13.0.0"
 sdks:
-  dart: ">=3.3.0 <4.0.0"
+  dart: ">=3.3.0-279.1.beta <4.0.0"
   flutter: ">=3.0.0"
diff --git a/example/test/widget_test.dart b/example/test/widget_test.dart
new file mode 100644
index 0000000..e36d3c2
--- /dev/null
+++ b/example/test/widget_test.dart
@@ -0,0 +1,27 @@
+// This is a basic Flutter widget test.
+//
+// To perform an interaction with a widget in your test, use the WidgetTester
+// utility in the flutter_test package. For example, you can send tap and scroll
+// gestures. You can also use WidgetTester to find child widgets in the widget
+// tree, read text, and verify that the values of widget properties are correct.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:flutter_qjs_example/main.dart';
+
+void main() {
+  testWidgets('Verify Platform version', (WidgetTester tester) async {
+    // Build our app and trigger a frame.
+    await tester.pumpWidget(const MyApp());
+
+    // Verify that platform version is retrieved.
+    expect(
+      find.byWidgetPredicate(
+        (Widget widget) => widget is Text &&
+                           widget.data!.startsWith('Running on:'),
+      ),
+      findsOneWidget,
+    );
+  });
+}
diff --git a/example/windows/flutter/generated_plugin_registrant.cc b/example/windows/flutter/generated_plugin_registrant.cc
index ace0f91..1c0e883 100644
--- a/example/windows/flutter/generated_plugin_registrant.cc
+++ b/example/windows/flutter/generated_plugin_registrant.cc
@@ -7,11 +7,8 @@
 #include "generated_plugin_registrant.h"
 
 #include <flutter_qjs/flutter_qjs_plugin.h>
-#include <sqlite3_flutter_libs/sqlite3_flutter_libs_plugin.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
   FlutterQjsPluginRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("FlutterQjsPlugin"));
-  Sqlite3FlutterLibsPluginRegisterWithRegistrar(
-      registry->GetRegistrarForPlugin("Sqlite3FlutterLibsPlugin"));
 }
diff --git a/example/windows/flutter/generated_plugins.cmake b/example/windows/flutter/generated_plugins.cmake
index bd22af4..876d3d9 100644
--- a/example/windows/flutter/generated_plugins.cmake
+++ b/example/windows/flutter/generated_plugins.cmake
@@ -4,7 +4,6 @@
 
 list(APPEND FLUTTER_PLUGIN_LIST
   flutter_qjs
-  sqlite3_flutter_libs
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST
diff --git a/ios/Classes/FlutterQjsPlugin.swift b/ios/Classes/FlutterQjsPlugin.swift
new file mode 100644
index 0000000..3a307bd
--- /dev/null
+++ b/ios/Classes/FlutterQjsPlugin.swift
@@ -0,0 +1,19 @@
+import Flutter
+import UIKit
+
+public class FlutterQjsPlugin: NSObject, FlutterPlugin {
+  public static func register(with registrar: FlutterPluginRegistrar) {
+    let channel = FlutterMethodChannel(name: "flutter_qjs", binaryMessenger: registrar.messenger())
+    let instance = FlutterQjsPlugin()
+    registrar.addMethodCallDelegate(instance, channel: channel)
+  }
+
+  public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+    switch call.method {
+    case "getPlatformVersion":
+      result("iOS " + UIDevice.current.systemVersion)
+    default:
+      result(FlutterMethodNotImplemented)
+    }
+  }
+}
diff --git a/linux/flutter_qjs_plugin_private.h b/linux/flutter_qjs_plugin_private.h
new file mode 100644
index 0000000..5c450f8
--- /dev/null
+++ b/linux/flutter_qjs_plugin_private.h
@@ -0,0 +1,10 @@
+#include <flutter_linux/flutter_linux.h>
+
+#include "include/flutter_qjs/flutter_qjs_plugin.h"
+
+// This file exposes some plugin internals for unit testing. See
+// https://github.com/flutter/flutter/issues/88724 for current limitations
+// in the unit-testable API.
+
+// Handles the getPlatformVersion method call.
+FlMethodResponse *get_platform_version();
diff --git a/linux/test/flutter_qjs_plugin_test.cc b/linux/test/flutter_qjs_plugin_test.cc
new file mode 100644
index 0000000..b9e9bbe
--- /dev/null
+++ b/linux/test/flutter_qjs_plugin_test.cc
@@ -0,0 +1,31 @@
+#include <flutter_linux/flutter_linux.h>
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+#include "include/flutter_qjs/flutter_qjs_plugin.h"
+#include "flutter_qjs_plugin_private.h"
+
+// This demonstrates a simple unit test of the C portion of this plugin's
+// implementation.
+//
+// Once you have built the plugin's example app, you can run these tests
+// from the command line. For instance, for a plugin called my_plugin
+// built for x64 debug, run:
+// $ build/linux/x64/debug/plugins/my_plugin/my_plugin_test
+
+namespace flutter_qjs {
+namespace test {
+
+TEST(FlutterQjsPlugin, GetPlatformVersion) {
+  g_autoptr(FlMethodResponse) response = get_platform_version();
+  ASSERT_NE(response, nullptr);
+  ASSERT_TRUE(FL_IS_METHOD_SUCCESS_RESPONSE(response));
+  FlValue* result = fl_method_success_response_get_result(
+      FL_METHOD_SUCCESS_RESPONSE(response));
+  ASSERT_EQ(fl_value_get_type(result), FL_VALUE_TYPE_STRING);
+  // The full string varies, so just validate that it has the right format.
+  EXPECT_THAT(fl_value_get_string(result), testing::StartsWith("Linux "));
+}
+
+}  // namespace test
+}  // namespace flutter_qjs
diff --git a/windows/flutter_qjs_plugin.h b/windows/flutter_qjs_plugin.h
new file mode 100644
index 0000000..5c83686
--- /dev/null
+++ b/windows/flutter_qjs_plugin.h
@@ -0,0 +1,31 @@
+#ifndef FLUTTER_PLUGIN_FLUTTER_QJS_PLUGIN_H_
+#define FLUTTER_PLUGIN_FLUTTER_QJS_PLUGIN_H_
+
+#include <flutter/method_channel.h>
+#include <flutter/plugin_registrar_windows.h>
+
+#include <memory>
+
+namespace flutter_qjs {
+
+class FlutterQjsPlugin : public flutter::Plugin {
+ public:
+  static void RegisterWithRegistrar(flutter::PluginRegistrarWindows *registrar);
+
+  FlutterQjsPlugin();
+
+  virtual ~FlutterQjsPlugin();
+
+  // Disallow copy and assign.
+  FlutterQjsPlugin(const FlutterQjsPlugin&) = delete;
+  FlutterQjsPlugin& operator=(const FlutterQjsPlugin&) = delete;
+
+  // Called when a method is called on this plugin's channel from Dart.
+  void HandleMethodCall(
+      const flutter::MethodCall<flutter::EncodableValue> &method_call,
+      std::unique_ptr<flutter::MethodResult<flutter::EncodableValue>> result);
+};
+
+}  // namespace flutter_qjs
+
+#endif  // FLUTTER_PLUGIN_FLUTTER_QJS_PLUGIN_H_
diff --git a/windows/flutter_qjs_plugin_c_api.cpp b/windows/flutter_qjs_plugin_c_api.cpp
new file mode 100644
index 0000000..3221853
--- /dev/null
+++ b/windows/flutter_qjs_plugin_c_api.cpp
@@ -0,0 +1,12 @@
+#include "include/flutter_qjs/flutter_qjs_plugin_c_api.h"
+
+#include <flutter/plugin_registrar_windows.h>
+
+#include "flutter_qjs_plugin.h"
+
+void FlutterQjsPluginCApiRegisterWithRegistrar(
+    FlutterDesktopPluginRegistrarRef registrar) {
+  flutter_qjs::FlutterQjsPlugin::RegisterWithRegistrar(
+      flutter::PluginRegistrarManager::GetInstance()
+          ->GetRegistrar<flutter::PluginRegistrarWindows>(registrar));
+}
diff --git a/windows/include/flutter_qjs/flutter_qjs_plugin_c_api.h b/windows/include/flutter_qjs/flutter_qjs_plugin_c_api.h
new file mode 100644
index 0000000..02cc087
--- /dev/null
+++ b/windows/include/flutter_qjs/flutter_qjs_plugin_c_api.h
@@ -0,0 +1,23 @@
+#ifndef FLUTTER_PLUGIN_FLUTTER_QJS_PLUGIN_C_API_H_
+#define FLUTTER_PLUGIN_FLUTTER_QJS_PLUGIN_C_API_H_
+
+#include <flutter_plugin_registrar.h>
+
+#ifdef FLUTTER_PLUGIN_IMPL
+#define FLUTTER_PLUGIN_EXPORT __declspec(dllexport)
+#else
+#define FLUTTER_PLUGIN_EXPORT __declspec(dllimport)
+#endif
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+FLUTTER_PLUGIN_EXPORT void FlutterQjsPluginCApiRegisterWithRegistrar(
+    FlutterDesktopPluginRegistrarRef registrar);
+
+#if defined(__cplusplus)
+}  // extern "C"
+#endif
+
+#endif  // FLUTTER_PLUGIN_FLUTTER_QJS_PLUGIN_C_API_H_
diff --git a/windows/test/flutter_qjs_plugin_test.cpp b/windows/test/flutter_qjs_plugin_test.cpp
new file mode 100644
index 0000000..486b0da
--- /dev/null
+++ b/windows/test/flutter_qjs_plugin_test.cpp
@@ -0,0 +1,43 @@
+#include <flutter/method_call.h>
+#include <flutter/method_result_functions.h>
+#include <flutter/standard_method_codec.h>
+#include <gtest/gtest.h>
+#include <windows.h>
+
+#include <memory>
+#include <string>
+#include <variant>
+
+#include "flutter_qjs_plugin.h"
+
+namespace flutter_qjs {
+namespace test {
+
+namespace {
+
+using flutter::EncodableMap;
+using flutter::EncodableValue;
+using flutter::MethodCall;
+using flutter::MethodResultFunctions;
+
+}  // namespace
+
+TEST(FlutterQjsPlugin, GetPlatformVersion) {
+  FlutterQjsPlugin plugin;
+  // Save the reply value from the success callback.
+  std::string result_string;
+  plugin.HandleMethodCall(
+      MethodCall("getPlatformVersion", std::make_unique<EncodableValue>()),
+      std::make_unique<MethodResultFunctions<>>(
+          [&result_string](const EncodableValue* result) {
+            result_string = std::get<std::string>(*result);
+          },
+          nullptr, nullptr));
+
+  // Since the exact string varies by host, just ensure that it's a string
+  // with the expected format.
+  EXPECT_TRUE(result_string.rfind("Windows ", 0) == 0);
+}
+
+}  // namespace test
+}  // namespace flutter_qjs