Activity class does not exist

Question

Aaaargh! I don\'t know what\'s going on, but suddenly I can\'t launch my app. I\'m using IntelliJ and I keep getting this error. I thought maybe there was a typo somewhere i

Answer 1

It happened with me because I forget to add it in manifest file or misspell Class name

Answer 2

I had a problem with identical symptoms and following solved it in my case.

1. If you're not already, use LogCat window to get more precise information about the exception than console offers.

2. If you haven't already, check through your layout XML files in case you have a custom object and you're using the wrong path for a resource.

3. If you haven't already, or you have to address the above, try cleaning your project and then building again.

Answer 3

I get this all the time in intellij.

It looks like you are missing the line that states what your default package is e.g. Com.foo. Something is wrong with your manifest there...try creating a new blank test project and compare what you are missing because that looks like it is too short.

Answer 4

In Android Studio under Run->Edit Configurations check that the package name is correct in the Launch Activity box.

I had an issue with a capital letter in that box that wasn't in the package name.

Answer 5

Similar to Joff's answer. It seems in Lollipop, when you try to uninstall an application, it doesn't uninstall for all users (although I only have one user).

I just go to the Apps section in Settings, select the application and use the menu and "Uninstall for all users".

Answer 6

its as simple as just removing the . (dot) in front of your activitys name. Your main activity should not be dotted. Dots in front of the name means its an child of the main one.