Your packages are a mess.
You define com.example.kevinboonemidi
as your package in the manifest, declare your Activity to be in com.example.haptic
and actually put your Activity in com.example.haptic_sof
.
Change android:name="com.example.haptic.MainActivity"
to android:name="com.example.haptic_sof.MainActivity"
and your app should run, though you may need to end up using one package entirely at least to start with.