Limitations and Warnings

VanGogh library is limited by the Android's ViewPropertyAnimator implementation, which means that one view can only be controlled by one animator at a time. This means that you can not apply two animations on one view at the same time, so:

// Works.
fadeIn(view).andThen(fadeOut(view)).subscribe();

// Doesn't work.
fadeIn(view).mergeWith(rotate(view, 90f)).subscribe();

If you would like to perform the second animation, you'd have to define a custom implementation that performs these two animations together, for example:

public static AnimationCompletable fadeInAndRotate90Degrees(View view) {
  return AnimationBuilder.forView(view)
      .alpha(1f)
      .rotation(90f)
      .buildCompletable();
}

public void animate() {
  // Execute animation.
  fadeInAndRotate90Degrees(view).subscribe();
}