Just tried to run an app I wrote a while back, and...

# android

[Landry Norris]

Just tried to run an app I wrote a while back, and it suddenly crashes with an error that says it can't find the MainActivity on the classpath. I haven't updated the code in a few months, and it worked last I uploaded code. Has anyone seen this before?

[Jeff Lockhart]

Usually the thing that older apps need is to remove the package=<http://com.example.app|com.example.app> attribute from the AndroidManifest.xml and put it in build.gradle:

android {
    namespace "<http://com.example.app|com.example.app>"
    ...
}

[Jeff Lockhart]

Oh, and the other thing that this error is likely caused by, make sure the <activity> in the manifest has the attribute android:exported="true".

[Colton Idle]

Ive had this happen where I just do a gradle clean and reinstall

[Landry Norris]

Looks like a gradle clean and reinstall worked. I wonder what happened to the apk?