start stripe sdk module

stripe_android/android/src/main/kotlin/com/example/stripe_android/StripeAndroidPlugin.kt

@@ -1,36 +1,53 @@
 package com.example.stripe_android
 
 import androidx.annotation.NonNull
+import com.reactnativestripesdk.StripeSdkModule
 
 import io.flutter.embedding.engine.plugins.FlutterPlugin
+import io.flutter.embedding.engine.plugins.activity.ActivityAware
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
 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
 import io.flutter.plugin.common.PluginRegistry.Registrar
 
 /** StripeAndroidPlugin */
-class StripeAndroidPlugin: 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(@NonNull flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
-    channel = MethodChannel(flutterPluginBinding.binaryMessenger, "stripe_android")
-    channel.setMethodCallHandler(this)
-  }
-
-  override fun onMethodCall(@NonNull call: MethodCall, @NonNull result: Result) {
-    if (call.method == "getPlatformVersion") {
-      result.success("Android ${android.os.Build.VERSION.RELEASE}")
-    } else {
-      result.notImplemented()
+class StripeAndroidPlugin : FlutterPlugin, MethodCallHandler, ActivityAware {
+    /// 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
+    private lateinit var stripeSdk: StripeSdkModule
+
+    override fun onAttachedToEngine(@NonNull flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
+        channel = MethodChannel(flutterPluginBinding.binaryMessenger, "stripe_android")
+        channel.setMethodCallHandler(this)
+    }
+
+    override fun onMethodCall(@NonNull call: MethodCall, @NonNull result: Result) {
+        if (call.method == "getPlatformVersion") {
+            result.success("Android ${android.os.Build.VERSION.RELEASE}")
+        } else {
+            result.notImplemented()
+        }
+    }
+
+    override fun onDetachedFromEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
+        channel.setMethodCallHandler(null)
+    }
+
+    override fun onAttachedToActivity(binding: ActivityPluginBinding) {
+        stripeSdk = StripeSdkModule(binding)
+    }
+
+    override fun onDetachedFromActivityForConfigChanges() {
     }
-  }
 
-  override fun onDetachedFromEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
-    channel.setMethodCallHandler(null)
-  }
+    override fun onReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) {
+    }
+
+    override fun onDetachedFromActivity() {
+    }
 }

stripe_android/android/src/main/kotlin/com/facebook/react/bridge/ReactContextBaseJavaModule.java

@@ -3,6 +3,8 @@
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
+
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
 import io.flutter.plugin.common.PluginRegistry;
 
 import java.util.ArrayList;
@@ -12,9 +14,10 @@ public class ReactContextBaseJavaModule implements PluginRegistry.ActivityResult
 
     private final ArrayList<ActivityEventListener> eventListeners = new ArrayList<>();
 
-    protected ReactContextBaseJavaModule(Activity activity, PluginRegistry.Registrar registrar) {
-        this.activity = activity;
-        registrar.addActivityResultListener(this);
+    protected ReactContextBaseJavaModule(ActivityPluginBinding binding) {
+        this.activity = binding.getActivity();
+
+        binding.addActivityResultListener(this);
     }
 
     protected Context getReactApplicationContext() {