# Unable to start APK on android emulator using Katalon Mobile Recorder or Object Spy

**URL:** <https://forum.katalon.com/t/unable-to-start-apk-on-android-emulator-using-katalon-mobile-recorder-or-object-spy/11452>\
**Category:** Mobile Testing\
**Tags:** mobile-testing, katalon-studio\
**Created:** [June 11, 2018, 10:41am UTC](https://forum.katalon.com/t/unable-to-start-apk-on-android-emulator-using-katalon-mobile-recorder-or-object-spy/11452 "2018-06-11T10:41:53Z")\
**Posts on this page:** 1\
**Showing post:** 13

<div class="post-metadata">

**Author:** ![Chris\_Trevarthen](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/chris_trevarthen/32/358_2.png) [@Chris\_Trevarthen](https://forum.katalon.com/u/Chris_Trevarthen)\
**Post date:** [April 5, 2019, 1:11pm UTC](https://forum.katalon.com/t/unable-to-start-apk-on-android-emulator-using-katalon-mobile-recorder-or-object-spy/11452/13 "2019-04-05T13:11:42Z")

</div>

Hi @satish1607,

That is indeed very weird. Is it possible that you’re using a different username and password for the test versus when you login manually?

If you already have the app installed on your device, you can try to start the application in a different way by faking out the `startApplication` call with another apk (like the one from the Android Sample Tests).

See here for an example:

> [@How to change desired capabilities during executing the test suit on real android device](http://forum.katalon.com/t/how-to-change-desired-capabilities-during-executing-the-test-suit-on-real-android-device/18385/2):
>
> Hi @zanoon2010, I think you can fake out the test to switch applications by setting the Desired Capabilities, using RunConfiguration.setMobileDriverPreferencesProperty: import com.kms.katalon.core.configuration.RunConfiguration import com.kms.katalon.core.mobile.keyword.MobileBuiltInKeywords as Mobile // You will need a real .apk file here in order to launch successfully, even if you're not testing it String appFile = "/fullpathtomyfile/mobile-beta.apk" // The app info for the built-in app y…

– Chris

---

_[View the full topic](https://forum.katalon.com/t/unable-to-start-apk-on-android-emulator-using-katalon-mobile-recorder-or-object-spy/11452)._