How to increase int value in Java?

How to increase int value in Java?

Let's say I increase the integer value here from 0 - 100.
public void onProgressChanged(int progress) {
percentageMeasurer(progress);
}
And I read it like to that, to save it afterwards:
int someValue = 0;
public void percentageMeasurer(int currentProgress) {
int someValue = currentProgress);
}
The problem is, onProgressChanged will be excecuted twice, so the value of
someValue will always become 100, I would like to add these two values, so
the sum would be in the end 200, but of course it starts overwrite it the
next time onProgressChanged is excuted.