private void PlayAnimation()
{
var animator = ObjectAnimator.OfFloat (this, "animationSeek", 0.0f, 1.0f);
var animatorSet = new AnimatorSet ();
animatorSet.SetDuration (AnimationDuration);
animatorSet.SetInterpolator (new DecelerateInterpolator ());
animatorSet.SetTarget (this);
animatorSet.Play(animator);
animatorSet.Start();
}
private AnimatorSet GetAnimatorSet(int idx, bool expand)
{
AnimatorSet set = null;
var avgRadians = this.ToRadians(360 / (this.ChildCount - 1));
var w = Math.Min(this.MeasuredWidth, this.MeasuredHeight) / 2;
var cx = this.MeasuredWidth / 2;
var cy = this.MeasuredHeight / 2;
var c = this.GetChildAt(idx);
var radians = idx * avgRadians;
var hw = c.MeasuredWidth / 2;
var hy = c.MeasuredHeight / 2;
var tmp = (w - hw);
var l = w + (int)Math.Round(tmp * Math.Cos(radians) - hw);
var t = w + (int)Math.Round(tmp * Math.Sin(radians) - hw);
var duration = new Random(1000).Next(200, 1000);
set = new AnimatorSet();
set.SetInterpolator(new Android.Views.Animations.BounceInterpolator());
set.SetTarget(c);
set.SetDuration(200 * idx + duration);
//set.SetDuration(200);
float[] xs = new float[] { cx - hw, l };
float[] ys = new float[] { cy - hy, t };
float[] ss = new float[] { 0.1f, 1 };
if (!expand) {
Array.Reverse(xs);
Array.Reverse(ys);
Array.Reverse(ss);
}
var aniX = ObjectAnimator.OfFloat(c, "X", xs);
var aniY = ObjectAnimator.OfFloat(c, "Y", ys);
var aniSX = ObjectAnimator.OfFloat(c, "ScaleX", ss);
var aniSY = ObjectAnimator.OfFloat(c, "ScaleY", ss);
aniX.SetAutoCancel(true);
aniY.SetAutoCancel(true);
aniSX.SetAutoCancel(true);
aniSY.SetAutoCancel(true);
set.PlayTogether(aniX, aniY, aniSX, aniSY);
set.AnimationEnd += Set_AnimationEnd;
return set;
}