A View pager that can only be swiped programmatically

NonSwipeableViewPager

import android.annotation.SuppressLint
import android.content.Context
import android.support.v4.view.ViewPager
import android.util.AttributeSet
import android.view.MotionEvent
import android.view.animation.DecelerateInterpolator
import android.widget.Scroller

/**
 * Created by Zuhaib Ahmad on 30/7/2018.
 * <p>
 * A View pager that can only be swiped programmatically.
 */

class NonSwipeableViewPager : ViewPager {

    constructor(context: Context) : super(context) {
        addSmoothScroller()
    }

    constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {
        addSmoothScroller()
    }

    // Never allow swiping to switch between pages
    override fun onInterceptTouchEvent(event: MotionEvent): Boolean = false

    // Never allow swiping to switch between pages
    @SuppressLint("ClickableViewAccessibility")
    override fun onTouchEvent(event: MotionEvent): Boolean = false

    // Added for smooth scrolling
    private fun addSmoothScroller() = try {
        ViewPager::class.java.getDeclaredField("mScroller").apply {
            isAccessible = true
            set(this, SmoothScroller(context))
        }
    } catch (e: Exception) {
        e.printStackTrace()
    }

    inner class SmoothScroller(context: Context) : Scroller(context, DecelerateInterpolator()) {

        override fun startScroll(startX: Int, startY: Int, dx: Int, dy: Int, duration: Int) =
            super.startScroll(startX, startY, dx, dy, 350)
    }
}