Why does TextView.setText() warn you not to concatenate strings?

Question

If I do something like this

someTextView.setText(someString + " and more!");

it warns me "Do not concatenate text displayed with setText. Use resource string with placeholders."

Why does it warn this when string concatenation seems to work just fine?

Answer 1

It's better to use resource strings thinking about localization

Answer 2

That is a Lint tool running an inspection for you.