InstructionView.java 文件源码

/**
 * Initializes all animations needed to show / hide views.
 */
private void initAnimations() {
  Context context = getContext();
  rerouteSlideDownTop = AnimationUtils.loadAnimation(context, R.anim.slide_down_top);
  rerouteSlideUpTop = AnimationUtils.loadAnimation(context, R.anim.slide_up_top);

  Animation fadeIn = new AlphaAnimation(0, 1);
  fadeIn.setInterpolator(new DecelerateInterpolator());
  fadeIn.setDuration(300);

  Animation fadeOut = new AlphaAnimation(1, 0);
  fadeOut.setInterpolator(new AccelerateInterpolator());
  fadeOut.setStartOffset(1000);
  fadeOut.setDuration(1000);

  fadeInSlowOut = new AnimationSet(false);
  fadeInSlowOut.addAnimation(fadeIn);
  fadeInSlowOut.addAnimation(fadeOut);
}