Switch between two listeners

Question

In my program I would like to use two sets of wheels like the following:

hours = (WheelView) findViewById(R.id.hour);
NumericWheelAdapter hourAdapter = new NumericWheelAdapter(this, 0, 23, "%02d");
hourAdapter.setItemResource(R.layout.wheel_text_item);
hourAdapter.setItemTextResource(R.id.text);
hours.setViewAdapter(hourAdapter);
hours.setCyclic(true);

These wheels have a scrollinglistener hours.addScrollingListener(scrolledListener);

The scrollinglistener looks like this:

// Wheel scrolled listener
OnWheelScrollListener scrolledListener = new OnWheelScrollListener() {
    public void onScrollingStarted(WheelView wheel) {
    }
    public void onScrollingFinished(WheelView wheel) {
    update();
    }
};

I would like to set one wheel with the value of the other but when I instantiate two listeners and scroll the first one it goes on setting wheel one and then wheel two and then wheel one again.

Is it possible to disable a one of the two scrolledListener?

I've tried this:

    hours.addScrollingListener(null);
    hours.setEnabled(false);

But this gave an error and the program had to be stopped.

Thanks for your help!

PS: the wheels are from * Android Wheel Control. * https://code.google.com/p/android-wheel/

Answer 1

I've contacted the designer, Yuri, of the wheel that i'm using and he gave me the following solution which works:

// Wheel scrolled listener
OnWheelScrollListener scrolledListener = new OnWheelScrollListener() {
    boolean syncInProgress = false;

    public void onScrollingStarted(WheelView wheel) {
    }
    public void onScrollingFinished(WheelView wheel) {

        if (syncInProgress) {
            syncInProgress = false;
            return;
        }

        syncInProgress = true;
        if (wheel.getId() == R.id.wheel1) {
            // do something
        } else if (wheel.getId() == R.id.wheel2) {
            // do something else
        }
    }
};

Thank you all for your help!