Android Property Animations Code Snippets (Udacity)

Animations.kt

private fun ObjectAnimator.disableViewDuringAnimation(view: View) {
    addListener(object : AnimatorListenerAdapter() {
        override fun onAnimationStart(animation: Animator?) {
            view.isEnabled = false
        }

        override fun onAnimationEnd(animation: Animator?) {
            view.isEnabled = true
        }
    })
}

private fun rotater() {
    val animator = ObjectAnimator.ofFloat([Some Object such as an ImageView], View.ROTATION, -360f, 0f)
    animator.duration = 1000
    animator.disableViewDuringAnimation([Some Button])
    animator.start()
}

private fun translater() {
    val animator = ObjectAnimator.ofFloat([Some Object such as an ImageView], View.TRANSLATION_X, 200f)
    animator.repeatCount = 1
    animator.repeatMode = ObjectAnimator.REVERSE
    animator.disableViewDuringAnimation([Some Button])
    animator.start()
}

private fun scaler() {
    val scaleX = PropertyValuesHolder.ofFloat(View.SCALE_X, 4f)
    val scaleY = PropertyValuesHolder.ofFloat(View.SCALE_Y, 4f)
    val animator = ObjectAnimator.ofPropertyValuesHolder([Some Object such as an ImageView], scaleX, scaleY)
    animator.repeatCount = 1
    animator.repeatMode = ObjectAnimator.REVERSE
    animator.disableViewDuringAnimation(scaleButton)
    animator.start()
}

private fun fader() {
    val animator = ObjectAnimator.ofFloat([Some Object such as an ImageView], View.ALPHA, 0f)
    animator.repeatCount = 1
    animator.repeatMode = ObjectAnimator.REVERSE
    animator.disableViewDuringAnimation(fade)
    animator.start()
}

private fun colorizer() {
    var animator = ObjectAnimator.ofArgb([Some Object such as an ImageView].parent, "backgroundColor", Color.BLACK, Color.RED)
    animator.setDuration(500)
    animator.repeatCount = 1
    animator.repeatMode = ObjectAnimator.REVERSE
    animator.disableViewDuringAnimation(bgColor)
    animator.start()
}

private fun shower() {
    val container = star.parent as ViewGroup
    val containerW = container.width
    val containerH = container.height
    var starW: Float = star.width.toFloat()
    var starH: Float = star.height.toFloat()
    val newStar = AppCompatImageView(this)
    newStar.setImageResource(R.drawable.ic_star)
    newStar.layoutParams = FrameLayout.LayoutParams(FrameLayout.LayoutParams.WRAP_CONTENT,
            FrameLayout.LayoutParams.WRAP_CONTENT)
    container.addView(newStar)

    newStar.scaleX = Math.random().toFloat() * 1.5f + .1f
    newStar.scaleY = newStar.scaleX
    starW *= newStar.scaleX
    starH *= newStar.scaleY
    newStar.translationX = Math.random().toFloat() * containerW - starW / 2

    val set = AnimatorSet()
    set.playTogether(mover, rotator)
    set.duration = (Math.random() * 1500 + 500).toLong()

    set.addListener(object : AnimatorListenerAdapter() {
        override fun onAnimationEnd(animation: Animator?) {
            container.removeView(newStar)
        }
    })
    set.start()
}