A debounced onClickListener for Android

DebouncedOnClickListener.java

import android.os.SystemClock;
import android.view.View;

import java.util.Map;
import java.util.WeakHashMap;

/**
 * A Debounced OnClickListener
 * Rejects clicks that are too close together in time.
 * This class is safe to use as an OnClickListener for multiple views, and will debounce each one separately.
 */
public abstract class DebouncedOnClickListener implements View.OnClickListener {

    private final long minimumInterval;
    private Map<View, Long> lastClickMap;

    /**
     * Implement this in your subclass instead of onClick
     * @param v The view that was clicked
     */
    public abstract void onDebouncedClick(View v);

    /**
     * The one and only constructor
     * @param minimumIntervalMsec The minimum allowed time between clicks - any click sooner than this after a previous click will be rejected
     */
    public DebouncedOnClickListener(long minimumIntervalMsec) {
        this.minimumInterval = minimumIntervalMsec;
        this.lastClickMap = new WeakHashMap<View, Long>();
    }

    @Override public void onClick(View clickedView) {
        Long previousClickTimestamp = lastClickMap.get(clickedView);
        long currentTimestamp = SystemClock.uptimeMillis();

        lastClickMap.put(clickedView, currentTimestamp);
        if(previousClickTimestamp == null || (currentTimestamp - previousClickTimestamp.longValue() > minimumInterval)) {
            onDebouncedClick(clickedView);
        }
    }
}

Excellent

Thanks.

Made a small kotlin remake, ready for production: https://gist.github.com/97aed21a2633bceae13261c1c5948cbd

nice - thanks!

…

------------------------------ Rich Freedman N2EHL <http://greybeardedgeek.net> <http://twitter.com/#!/greybeardedgeek> <http://www.linkedin.com/profile?viewProfile=&key=13484238&trk=tab_pro>

On Tue, Jun 18, 2019 at 9:38 AM Andrii Kovalchuk ***@***.***> wrote: Thanks. Made a small kotlin remake, ready for production: https://gist.github.com/97aed21a2633bceae13261c1c5948cbd — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <https://gist.github.com/5573388?email_source=notifications&email_token=AABZNEAL662CE6OA6WWDRBTP3DQOXA5CNFSM4HZAFRG2YY3PNVWWK3TUL52HS4DFVNDWS43UINXW23LFNZ2KUY3PNVWWK3TUL5UWJTQAFT3Z2#gistcomment-2946973>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AABZNEGWPJHQFVEVWM3HVTDP3DQOXANCNFSM4HZAFRGQ> .

I used this and it worked for regular events, but when my click event triggers an adapter.notifyDataSetChanged call, the previousClickStamp gets reset.