Forked from rfreedman/DebouncedOnClickListener.java
Created
November 18, 2019 07:15
-
-
Save hoajb/d198e26239e121e6d89889bdf4534b5a to your computer and use it in GitHub Desktop.
A debounced onClickListener for Android
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
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); | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment