The error shows that the method onPostCreate(Bundle savedInstance) could not be found in the class ARProgramaticallyActivity from the package com.yourcompany.craftarandroid
The method onPostCreate(Bundle savedInstanceState) it’s a method from Android Activity http://developer.android.com/reference/android/app/Activity.html#onPostCreate(android.os.Bundle). Note that this is not the method onPostCreate() from the CraftARActivity, since the one from the CraftARActivity has no parameters.
So, can you confirm that your class ARProgramatically activity is in the package com.yourcompany.craftarandroid? It looks like it might not be in that package, or that your removed the class and you’re still referencing it.
If you send us the .apk that it’s being generated, we will check what could be happening. Please send it privately to email@example.com.