As you can see, the ShowcaseView appears under the ActionBar
Can anyone point out the problem here?
If you're using ShowcaseView 5.3.0 or later, this is the new default behaviour (as users are now expected to use AppCompatActivity with a Toolbar).
You'll want to add this line to your ShowcaseView.Builder creation:
builder.useDecorViewAsParent()
Which should fix the issue!