Coverage Summary for Class: DebouncingClickListener (vit.khudenko.android.safe_click)

1 package vit.khudenko.android.safe_click
2 
3 import android.os.SystemClock
4 import android.view.View
5 
6 /**
7  * Base class for building click listeners that use click event debouncing. Child classes should implement [onClickAction] method.
8  *
9  * @param debounceTimeoutMillis debounce timeout in milliseconds.
10  *
11  * @throws IllegalArgumentException if [debounceTimeoutMillis] parameter is negative
12  */
13 abstract class DebouncingClickListener(
14     private val debounceTimeoutMillis: Long
15 ) : View.OnClickListener {
16 
17     init {
18         require(debounceTimeoutMillis >= 0) {
19             "debounceTimeoutMillis parameter can not be negative"
20         }
21     }
22 
23     private var lastClickTimestamp: Long = 0
24 
25     override fun onClick(v: View) {
26         val now = SystemClock.elapsedRealtime()
27         if (now - lastClickTimestamp < debounceTimeoutMillis) {
28             return
29         }
30         lastClickTimestamp = now
31         onClickAction(v)
32     }
33 
34     abstract fun onClickAction(v: View)
35 
36     fun reset() {
37         lastClickTimestamp = 0
38     }
39 }