# Change appId from io.ionic.starter not fully working on Android

**URL:** <https://forum.ionicframework.com/t/change-appid-from-io-ionic-starter-not-fully-working-on-android/205509>\
**Category:** Capacitor\
**Created:** [February 25, 2021, 10:18pm UTC](https://forum.ionicframework.com/t/change-appid-from-io-ionic-starter-not-fully-working-on-android/205509 "2021-02-25T22:18:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![basti](https://avatars.discourse-cdn.com/v4/letter/b/fbc32d/32.png) [@basti](https://forum.ionicframework.com/u/basti)\
**Post date:** [February 25, 2021, 10:18pm UTC](https://forum.ionicframework.com/t/change-appid-from-io-ionic-starter-not-fully-working-on-android/205509/1 "2021-02-25T22:18:39Z")

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I started with the standard `appId`: `io.ionic.starter` but now I want to change it.  
I removed the “`android`” folder, renamed the `appId` in `capacitor.config.json` and then `npx cap add andoid again`. The `appId` was also updated in the AndroidManifest.xml , but when I’m running my app, this error comes:

```auto
Error while executing: am start -n "io.ionic.starter/com.test.myapp.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=io.ionic.starter/com.test.myapp.MainActivity }
Error type 3
Error: Activity class {io.ionic.starter/com.test.myapp.MainActivity} does not exist.

Error while Launching activity

```

I searched for `io.ionic.starter`, but there is nothing left with that name.

Am I missing something?

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<div class="post-metadata">

**Author:** ![issho](https://avatars.discourse-cdn.com/v4/letter/i/848f3c/32.png) [@issho](https://forum.ionicframework.com/u/issho)\
**Post date:** [April 15, 2021, 10:51am UTC](https://forum.ionicframework.com/t/change-appid-from-io-ionic-starter-not-fully-working-on-android/205509/2 "2021-04-15T10:51:47Z")

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I had the exact same problem.

I fixed it by following the Android troubleshooting guide at [Capacitor - build cross platform apps with the web](https://capacitorjs.com/docs/android/troubleshooting)

The step that worked for me:

1. Open Android Studio
2. Click File → Invalidate Caches / Restart…