andrefrsousa

<android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

    <TextView
            android:id="@+id/toolbar_title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:fontFamily="sans-serif"

andrefrsousa

<android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

    <TextView
            android:id="@+id/toolbar_title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"

andrefrsousa

recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
    override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
        super.onScrolled(recyclerView, dx, dy)
        toolbar.setElevationVisibility()
        
        if (recyclerView.canScrollVertically(-1)) {
            ViewCompat.animate(this).translationZ(toolbarElevation).run {
                interpolator = DecelerateInterpolator()
                duration = animationDuration
                start()

andrefrsousa

scrollView.setOnScrollChangeListener(NestedScrollView.OnScrollChangeListener { _, _, scrollY, _, _ ->
    if (toolbar == null) {
        return@OnScrollChangeListener
    }

    if (scrollY > 0) {
        ViewCompat.animate(this).translationZ(toolbarElevation).run {
            interpolator = DecelerateInterpolator()
            duration = animationDuration
            start()