Alec-DeSouza

open class RotatableDialogFragment : DialogFragment() {
    init {
        retainInstance = true
    }

    // Fixes rotation bug with dialog fragments
    override fun onDestroyView() {
        if (retainInstance) {
            dialog?.setDismissMessage(null)
        }

Alec-DeSouza

class StoppableRecyclerView(context: Context, attrs: AttributeSet?, defStyle: Int)
    : RecyclerView(context, attrs, defStyle) {
    
    constructor(context: Context, attrs: AttributeSet?) : this(context, attrs, 0)

    constructor(context: Context) : this(context, null, 0)

    override fun onInterceptTouchEvent(e: MotionEvent?): Boolean {
        if(e?.action == MotionEvent.ACTION_DOWN) {
            stopNestedScroll()

Alec-DeSouza

view_pager.addOnPageChangeListener(object : ViewPager.SimpleOnPageChangeListener() {
    override fun onPageScrolled(position: Int, positionOffset: Float, positionOffsetPixels: Int) {
        // Interpolate all tab opacity values
        for (index in 0 until tab_layout.tabCount) {
            tab_layout.getTabAt(index)?.updateOpacity(position, positionOffset)
        }
    }

    fun TabLayout.Tab.updateOpacity(position: Int, offset: Float) {
        val diffTab = 1 - abs(position - this.position + offset)