Thank’s for reply, manojdcoder.
I’ve tried that, but Android only permit user to press ‘.’ button. When press ‘,’ button, the numericKeyboard ignores the value. In pt_BR locale, char ‘,’ is used as decimal part from Number.
On another Angular 2 WebApp, have solved this using component (ng2-currency-mask, URL https://www.npmjs.com/package/ng2-currency-mask).
I think if is possible change the locale in Nativescript Core, this can be solved.
Anyway, we are using full keyboard, users claim to change to NumericKeyboard, in the future, perhaps ?