How to make a sequence of two animations in Kotlin? - android-studio

Question

I have to animations in my Kotlin Scene and I want to make a sequence out of these two and I want the sequence to have infinite repetitions like looping the sequence.
//First Animation
ObjectAnimator.ofFloat(block, "translationX", 50f).apply {
duration = 500
start()
}
//Second Animation
ObjectAnimator.ofFloat(block, "translationX", 0f).apply {
duration = 500
start()
}
Thanks for your help!
Solution:
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.view.WindowManager
import kotlinx.android.synthetic.main.activity_main.*
import android.animation.ValueAnimator
import android.animation.ObjectAnimator
import android.animation.AnimatorSet
import android.animation.Animator
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
animateTogether(
stripe.objectAnimate() // https://github.com/blipinsk/ViewPropertyObjectAnimator
.translationX(100f)
.get(),
stripe.objectAnimate()
.translationX(-100f)
.get()
).start()
}
fun animateTogether(vararg animators: Animator): AnimatorSet =
AnimatorSet().apply {
ObjectAnimator.ofFloat(stripe, "translationX", 100f).apply {
duration = 500
start()
}
ObjectAnimator.ofFloat(stripe, "translationX", -100f).apply {
duration = 500
start()
}
}

Answer 1

Try AnimatorSet
AnimatorSet as = new AnimatorSet();
as.playSequentially(ObjectAnimator.ofFloat(...),
ObjectAnimator.ofFloat(...));
then you have two ways to loop it one set repeat mode on it's each animators taken from here
objectAnimator.setRepeatCount(ObjectAnimator.INFINITE);
objectAnimator.setRepeatMode(ObjectAnimator.RESTART/REVERSE...);
second use AnimatorListenerAdapter to listen when animation ends and restart the same animation.
mAnimationSet.addListener(new AnimatorListenerAdapter() {
#Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
mAnimationSet.start();
}
});
mAnimationSet.start();

Answer 2

I like to do the following:
fun View.objectAnimate() = ViewPropertyObjectAnimator.animate(this) // https://github.com/blipinsk/ViewPropertyObjectAnimator
fun animateTogether(vararg animators: Animator): AnimatorSet =
AnimatorSet().apply {
playTogether(*animators)
}
And now I can do
animateTogether(
someView.objectAnimate()
.translationX(40.dp)
.get(),
otherView.objectAnimate()
.translationX(-40.dp)
.get()
).start()
For sequence, you can play with .duration and .initialDelay values of Animator, and can set repeat mode, etc.