public static void alphaAnimator(@NonNull List<Animator> animators,@NonNull View view,@FloatRange(from=0.0,to=1.0) float alphaFrom){
  ViewCompat.setAlpha(view,0);
  animators.add(ObjectAnimator.ofFloat(view,"alpha",alphaFrom,1f));
}

public static void alphaAnimator ( @ NonNull List < Animator > animators , @ NonNull View view , @ FloatRange ( from = 0.0 , to = 1.0 ) float alphaFrom ) { ViewCompat . setAlpha ( view , 0 ) ; animators . add ( ObjectAnimator . ofFloat ( view , "alpha" , alphaFrom , 1f ) ) ; }
this is the default animator .
