import android.view.View;import android.view.animation.AlphaAnimation;public class AnimationUtil {   public static void showAlphaAnimation(View v, long durationMillis) {      AlphaAnimation animation = new AlphaAnimation(0, 1);      animation.setDuration(durationMillis);      v.startAnimation(animation);   }   public static void hideAlphaAnimation(View v, long durationMillis) {      AlphaAnimation animation = new AlphaAnimation(1, 0);      animation.setDuration(durationMillis);      v.startAnimation(animation);   }}