ClickDebouncer.kt

ClickDebouncer.kt

import android.os.Handler
import android.view.View

/**
 * A class for debouncing clicks
 */
abstract class DebouncingOnClickListener : View.OnClickListener {
    private val clickDebouncer = ClickDebouncer()

    override fun onClick(v: View) {
        clickDebouncer.debounceClick {
            doClick(v)
        }
    }

    abstract fun doClick(v: View)
}

class ClickDebouncer {
    private var enabled = true
    private val handler = Handler()

    fun debounceClick(onClick: () -> Unit) {
        if (enabled) {
            enabled = false
            handler.postDelayed({ enabled = true }, DEBOUNCE_TIMEOUT)
            onClick()
        }
    }

    companion object {
        private const val DEBOUNCE_TIMEOUT = 500L
    }
}

inline fun View.debounceClick(crossinline onClick: (view: View) -> Unit) {
    setOnClickListener(object : DebouncingOnClickListener() {
        override fun doClick(v: View) {
            onClick.invoke(v)
        }
    })
}