Random Number Generator Generates Same Numbers on Android

I have recently started learning about programming mobile applications. I was doing some practice, writing basic programs. First of all I am using LibGDX, so first I test my application on desktop then test it on android.

Somewhere in my program it has to generate 3 random numbers from 0, 1, 2 ( they can be the same numbers as long as they are random ). On desktop my program works fine, it generates 3 random numbers each time i run it. However when i try it on my android phone, all the three numbers are the same. For example 3 trials: My desktop: 0-0-1, 2-1-2, 2-0-1 My phone; 0-0-0, 2-2-2, 0-0-0;

for (int x = 0; x < 3; x++){
  Random randomGenerator = new Random();
  int randomNumber = randomGenerator.nextInt(3);
  postNumber(randomNumber);//This function I wrote sends the randomNumber to be drawn on the screen

}