diff --git a/src/app/app.cc b/src/app/app.cc
index 0dbc5e34b..216c3cef4 100644
--- a/src/app/app.cc
+++ b/src/app/app.cc
@@ -1125,7 +1125,7 @@ extern "C" {
   void ANDROID_EXTERNAL(app, App, onCreateAppActivity)(
     JNIEnv *env,
     jobject self,
-    jobject appActivity
+    jobject activity
   ) {
     auto app = App::sharedApplication();
 
@@ -1133,11 +1133,13 @@ extern "C" {
       ANDROID_THROW(env, "Missing 'App' in environment");
     }
 
-    if (app->appActivity) {
-      app->jni->DeleteGlobalRef(app->appActivity);
+    if (app->activity) {
+      app->jni->DeleteGlobalRef(app->activity);
     }
 
-    app->appActivity = env->NewGlobalRef(appActivity);
+    app->activity = env->NewGlobalRef(activity);
+    app->core->platform.jvm = Android::JVMEnvironment(app->jni);
+    app->core->platform.activity = app->activity;
     app->run();
 
     if (app->windowManager.getWindowStatus(0) == WindowManager::WINDOW_NONE) {
@@ -1218,7 +1220,7 @@ extern "C" {
   void ANDROID_EXTERNAL(app, App, onDestroyAppActivity)(
     JNIEnv *env,
     jobject self,
-    jobject appActivity
+    jobject activity
   ) {
     auto app = App::sharedApplication();
 
@@ -1226,9 +1228,10 @@ extern "C" {
       ANDROID_THROW(env, "Missing 'App' in environment");
     }
 
-    if (app->appActivity) {
-      env->DeleteGlobalRef(app->appActivity);
-      app->appActivity = nullptr;
+    if (app->activity) {
+      env->DeleteGlobalRef(app->activity);
+      app->activity = nullptr;
+      app->core->platform.activity = nullptr;
     }
   }
 
diff --git a/src/app/app.hh b/src/app/app.hh
index 7de352694..42f470202 100644
--- a/src/app/app.hh
+++ b/src/app/app.hh
@@ -82,9 +82,9 @@ namespace SSC {
       Android::BuildInformation androidBuildInformation;
       Android::Looper androidLooper;
       Android::JVMEnvironment jvm;
+      Android::Activity activity = nullptr;
+      Android::Application self = nullptr;
       JNIEnv* jni = nullptr;
-      jobject self = nullptr;
-      jobject appActivity = nullptr;
       bool isAndroidEmulator = false;
     #endif
 
diff --git a/src/app/app.kt b/src/app/app.kt
index d13508d26..6171aea14 100644
--- a/src/app/app.kt
+++ b/src/app/app.kt
@@ -11,6 +11,7 @@ import android.app.NotificationManager
 import android.content.Intent
 import android.content.pm.PackageManager
 import android.content.res.AssetManager
+import android.net.Uri
 import android.os.Build
 import android.os.Bundle
 import android.webkit.MimeTypeMap
@@ -63,6 +64,13 @@ open class AppActivity : WindowManagerActivity() {
     )
   }
 
+  fun openExternal (value: String) {
+    val uri = Uri.parse(value)
+    val action = Intent.ACTION_VIEW
+    val intent = Intent(action, uri)
+    this.startActivity(intent)
+  }
+
   override fun onCreate (savedInstanceState: Bundle?) {
     this.supportActionBar?.hide()
     this.getWindow()?.statusBarColor = android.graphics.Color.TRANSPARENT
diff --git a/src/window/android.cc b/src/window/android.cc
index 4bd963236..fe8a32379 100644
--- a/src/window/android.cc
+++ b/src/window/android.cc
@@ -44,7 +44,7 @@ namespace SSC {
     // `activity.createWindow(index, shouldExitApplicationOnClose): Unit`
     CallVoidClassMethodFromAndroidEnvironment(
       attachment.env,
-      app->appActivity,
+      app->activity,
       "createWindow",
       "(IZZ)V",
       options.index,
@@ -84,7 +84,7 @@ namespace SSC {
     CallClassMethodFromAndroidEnvironment(
       attachment.env,
       Boolean,
-      app->appActivity,
+      app->activity,
       "evaluateJavaScript",
       "(ILjava/lang/String;)Z",
       this->index,
@@ -102,7 +102,7 @@ namespace SSC {
     CallClassMethodFromAndroidEnvironment(
       attachment.env,
       Boolean,
-      app->appActivity,
+      app->activity,
       "showWindow",
       "(I)Z",
       this->index
@@ -117,7 +117,7 @@ namespace SSC {
     CallClassMethodFromAndroidEnvironment(
       attachment.env,
       Boolean,
-      app->appActivity,
+      app->activity,
       "hideWindow",
       "(I)Z",
       this->index
@@ -140,7 +140,7 @@ namespace SSC {
     CallClassMethodFromAndroidEnvironment(
       attachment.env,
       Boolean,
-      app->appActivity,
+      app->activity,
       "closeWindow",
       "(I)Z",
       this->index
@@ -168,7 +168,7 @@ namespace SSC {
     const auto result = CallClassMethodFromAndroidEnvironment(
       attachment.env,
       Boolean,
-      app->appActivity,
+      app->activity,
       "navigateWindow",
       "(ILjava/lang/String;)Z",
       this->index,
@@ -188,7 +188,7 @@ namespace SSC {
     // `activity.getWindowTitle(index): String`
     const auto titleString = (jstring) CallObjectClassMethodFromAndroidEnvironment(
       attachment.env,
-      app->appActivity,
+      app->activity,
       "getWindowTitle",
       "(I)Ljava/lang/String;",
       this->index
@@ -206,7 +206,7 @@ namespace SSC {
     CallClassMethodFromAndroidEnvironment(
       attachment.env,
       Boolean,
-      app->appActivity,
+      app->activity,
       "setWindowTitle",
       "(ILjava/lang/String;)Z",
       this->index,