Question

Still fairly new to android. I am trying to learn how to create a random number that has 12 characters, and each time a number is randomly created, it saves to the android database. Please any help with giving me an idea on how to do this would be grateful.

Answer 1

Use

Math.random();  
//Complete rnd float between 0 and 1 e.g.
//0.2558734951799192
//0.03857502479001995
//0.08562741500057713
//0.2329257841571789
//0.7471882261881438

or

Random rand = new Random();
int rndNumber = rand.nextInt(49);  
//Numbers between 0 and 48

—

So 12 digit random number can be done with both

float random = 100000000000 + Math.random() * 899999999999;

or

Random rand = new Random();
float rndNumber =100000000000 +  rand.nextFloat(899999999999)+1;  

—

Edited thx to Frizi