Question

Kind of a silly problem I’m facing here… Basically I’m in a For-loop and within this loop I’m always calling a function to make a button. But in this function I want to pass the loop iterator as it’s changing to differentiate the buttons. But then it tells me I need to make the loop iterator “final” which means it doesn’t change!

Well my problem will make more sense with some skeleton code:

for(int i = 0; i < appList.size(); i++) { 

                //some other stuff including creating the below button 'btn'

                btn.setOnClickListener(new View.OnClickListener() {
                    public void onClick(View v) {
                        //set some attribute based on i
                        //but when I do this it only sets based on the greatest value of i (!)
                    }
                });
}

Meh kinda silly problem I know… I’m new to Java though!

Cheers.

Answer 1

for(int i = 0; i < appList.size(); i++) { 

    final int _i = i;

    btn.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            // use _i instead of i
        }
    });
}