java - Keep regenerating different random numbers in Android -

i making app android, , need number, keep changing randomly every time call it.

but, if this:

random r = new random(); // makes random r public int rndnum = r.nextint(1000) + 7;  

and use rndnum few times, remains same randomly generated number every time.

is there way keep regenerating random number?

maybe try securerandom class : https://docs.oracle.com/javase/7/docs/api/java/security/securerandom.html

initialization in expensive can initialize securerandom once @ startup of application , keep using it.