Can't handle both click and touch events simultaneously

Question

I am trying to handle touch events and click events on a button. I do the following:

button.setOnClickListener(clickListener);
button.setOnTouchListener(touc         


        

Answer 1

This is an example of TouchListener that doesn't shadow ClickListener.

import android.graphics.PointF
import android.view.MotionEvent
import android.view.MotionEvent.*
import android.view.View
import kotlin.math.abs

object TouchAndClickListener : View.OnTouchListener {

    /** Those are factors you can change as you prefer */
    private const val touchMoveFactor = 10
    private const val touchTimeFactor = 200


    private var actionDownPoint = PointF(0f, 0f)
    private var previousPoint = PointF(0f, 0f)
    private var touchDownTime = 0L

    override fun onTouch(v: View, event: MotionEvent) = when (event.action) {
        ACTION_DOWN -> PointF(event.x, event.y).let {

            actionDownPoint = it  // Store it to compare position when ACTION_UP
            previousPoint = it  // Store it to compare position when ACTION_MOVE
            touchDownTime = now() // Store it to compare time when ACTION_UP

            /* Do other stuff related to ACTION_DOWN you may whant here */

            true
        }

        ACTION_UP -> PointF(event.x, event.y).let {

            val isTouchDuration = now() - touchDownTime < touchTimeFactor  // short time should mean this is a click
            val isTouchLength = abs(it.x - actionDownPoint.x) + abs(it.y - actionDownPoint.y) < touchMoveFactor  // short length should mean this is a click

            val shouldClick = isTouchLength && isTouchDuration  // Check both

            if (shouldClick) yourView.performClick() //Previously define setOnClickListener{ } on yourView, then performClick() will call it

            /* Do other stuff related to ACTION_UP you may whant here */

            true
        }

        ACTION_MOVE -> PointF(event.x, event.y).let {

            /* Do other stuff related to ACTION_MOVE you may whant here */

            previousPoint = it
            true
        }

        else -> false // Nothing particular with other event
    }

    private fun now() = System.currentTimeMillis()
}