Question

i’ve made a simple counter program, where i click the plus or minus button and it adds or removes 1 from a counter.

I would like to be able to add more counters: ex. counter1, counter2, counter3 etc.
Here’s an example of how i’m doing now with 2 counters, but as you can see i have declared my variables, and i would like to generate them automaticly

int counter, counter2;
ImageButton add, sub, add2, sub2, btnSet;
TextView display, display2;

And here’s how i am using the plus button

// Plus button setup
    add.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            counter++;
            display.setText(""+counter);
            Vibrator vibr = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);

            vibr.vibrate (20);

Answer 1

You could create a class that holds the information related to your increment button:

class IncrementButton {
    int step;
    int counter;
    ImageButton add, sub;
    TextView display;

    public IncrementButton(int step) {
        this.step = step;
        add = ...
        sub = ...
        display = ...

        add.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                counter += step;
                display.setText("" + counter);
                Vibrator vibr = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
                vibr.vibrate (20);
            }
        }

        ...

    }
}

and put objects of that class in a list – for example for 3 buttons:

List<IncrementButton> buttons = new ArrayList<IncrementButton> ();

for (int i = 0; i < 3; i++) {
    IncrementButton btn = new IncrementButton(i + 1);
    buttons.add(btn);
}