@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR1)
public static ViewPropertyAnimator fadeIn(View to, int duration) {
if (to.getVisibility() != View.VISIBLE) {
to.setAlpha(0f);
to.setVisibility(View.VISIBLE);
}
to.clearAnimation();
final ViewPropertyAnimator animator = to.animate();
animator.alpha(1f).setDuration(duration).setListener(null);
return animator;
}
@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR1)
public static ViewPropertyAnimator fadeOut(final View from, int duration) {
if (from.getVisibility() == View.VISIBLE) {
from.clearAnimation();
final ViewPropertyAnimator animator = from.animate();
animator
.alpha(0f)
.setDuration(duration)
.setListener(
new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
from.setVisibility(View.INVISIBLE);
from.setAlpha(1f);
}
});
return animator;
}
return null;
}