diff --git a/tests/app/app/mainPage.ts b/tests/app/app/mainPage.ts
index 18b64fce2..3f6394614 100644
--- a/tests/app/app/mainPage.ts
+++ b/tests/app/app/mainPage.ts
@@ -24,7 +24,7 @@ page.on(Page.navigatedToEvent, onNavigatedTo);
 function onNavigatedTo(args) {
     let label = new Label();
     label.text = "Running non-UI tests...";
-    page.content = label
+    page.content = label;
     args.object.off(Page.navigatedToEvent, onNavigatedTo);
     setTimeout(function () {
         tests.runAll();
diff --git a/tests/app/application-tests.android.ts b/tests/app/application-tests.android.ts
index 064a831e2..143ffe7b9 100644
--- a/tests/app/application-tests.android.ts
+++ b/tests/app/application-tests.android.ts
@@ -43,6 +43,7 @@ export var testAndroidApplicationInitialized = function () {
     TKUnit.assert(app.android.context, "Android context not initialized.");
     TKUnit.assert(app.android.currentContext, "Android currentContext not initialized.");
     TKUnit.assert(app.android.foregroundActivity, "Android foregroundActivity not initialized.");
+    TKUnit.assert(app.android.foregroundActivity.isNativeScriptActivity, "Andorid foregroundActivity.isNativeScriptActivity is true");
     TKUnit.assert(app.android.startActivity, "Android startActivity not initialized.");
     TKUnit.assert(app.android.nativeApp, "Android nativeApp not initialized.");
     TKUnit.assert(app.android.packageName, "Android packageName not initialized.");
diff --git a/tns-core-modules/application/application.android.ts b/tns-core-modules/application/application.android.ts
index 9b356031b..7210055b0 100644
--- a/tns-core-modules/application/application.android.ts
+++ b/tns-core-modules/application/application.android.ts
@@ -4,7 +4,6 @@ import frame = require("ui/frame");
 import observable = require("data/observable");
 import * as typesModule from "utils/types";
 import * as enumsModule from "ui/enums";
-import { isNativeScriptActivity } from "ui/frame/activity";
 let enums: typeof enumsModule;
 
 global.moduleMerge(appModule, exports);
@@ -14,6 +13,9 @@ function initLifecycleCallbacks() {
     // TODO: Verify whether the logic for triggerring application-wide events based on Activity callbacks is working properly
     let lifecycleCallbacks = new android.app.Application.ActivityLifecycleCallbacks({
         onActivityCreated: function (activity: any, bundle: any) {
+
+            console.log("------> onActivityCreated: " + activity + " activity.isNativeScriptActivity: " + activity.isNativeScriptActivity);
+
             // Set app theme after launch screen was used during startup
             let activityInfo = activity.getPackageManager().getActivityInfo(activity.getComponentName(), android.content.pm.PackageManager.GET_META_DATA);
             if (activityInfo.metaData) {
@@ -52,7 +54,7 @@ function initLifecycleCallbacks() {
                 androidApp.foregroundActivity = undefined;
             }
 
-            if (isNativeScriptActivity(activity)) {
+            if (activity.isNativeScriptActivity) {
                 androidApp.paused = true;
 
                 if (typedExports.onSuspend) {
@@ -70,7 +72,7 @@ function initLifecycleCallbacks() {
         onActivityResumed: function (activity: any) {
             androidApp.foregroundActivity = activity;
 
-            if (isNativeScriptActivity(activity)) {
+            if (activity.isNativeScriptActivity) {
                 if (typedExports.onResume) {
                     typedExports.onResume();
                 }
diff --git a/tns-core-modules/ui/frame/activity.android.ts b/tns-core-modules/ui/frame/activity.android.ts
index 6d9ba2724..229c9a4df 100644
--- a/tns-core-modules/ui/frame/activity.android.ts
+++ b/tns-core-modules/ui/frame/activity.android.ts
@@ -3,12 +3,16 @@ import {setActivityCallbacks, AndroidActivityCallbacks} from "ui/frame";
 @JavaProxy("com.tns.NativeScriptActivity")
 class NativeScriptActivity extends android.app.Activity {
     private _callbacks: AndroidActivityCallbacks;
+    public isNativeScriptActivity;
     constructor() {
         super();
         return global.__native(this);
     }
 
     protected onCreate(savedInstanceState: android.os.Bundle): void {
+        // Set isNativeScriptActivity in onCreate.
+        // The JS construcotr might not be called beacuse the activity is created from Andoird.
+        this.isNativeScriptActivity = true;
         if (!this._callbacks) {
             setActivityCallbacks(this);
         }
@@ -43,8 +47,4 @@ class NativeScriptActivity extends android.app.Activity {
     protected onActivityResult(requestCode: number, resultCode: number, data: android.content.Intent): void {
         this._callbacks.onActivityResult(this, requestCode, resultCode, data, super.onActivityResult);
     }
-}
-
-export function isNativeScriptActivity(activity: android.app.Activity): boolean {
-    return activity instanceof NativeScriptActivity;
 }
\ No newline at end of file
diff --git a/tns-core-modules/ui/frame/activity.d.ts b/tns-core-modules/ui/frame/activity.d.ts
deleted file mode 100644
index 3afed6e97..000000000
--- a/tns-core-modules/ui/frame/activity.d.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-declare module "ui/frame/activity" {
-  export function isNativeScriptActivity(activity: any/* android.app.Activity */): boolean;
-}
\ No newline at end of file