I can't run the app on my device error type 3

Question

Im making an android application and when i run it on my device i get error with launch activity

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

Error while Launching activity"

I'v tried disabling the instant run and checking the launch activity

Answer 1

it looks like the MainActivity.java class doesnot exist. that is what the error says. try

1. Refactoring name of the class
2. Rebuild the project.
3. Invalidate cache and restart and launch the app.