It appears integer variable i is not visible

Question

for (int i = 0; i < 9; i++)
{
    b[i].setOnClickListener(
        new OnClickListener()
        {
            public void onClick(View v)
            {
                justclicked(i);
            }
        }

    );
}

I am attempting to put an action listener on nine buttons using a for loop. The code above is giving me an error. Is the error caused by the value of i not being visible? Thanks a lot, world-class experts @ Stack Overflow!!

Answer 1

No, it's because i isn't final, which it must be to access from an anonymous inner class. Add

final int finalI = i;

before

b[i].setOnClickListener( ...

and then use finalI instead of i: justclicked(finalI);.

After that, think up a better name for i and finalI.

Answer 2

Create a class that implements OnClickListener with i as a constructor argument and use that to set the listeners.