AppTitleView.java 文件源码

private void init() {
  setText(getResources().getString(R.string.app_name).toLowerCase());
  FontUtils.apply(this, FontUtils.ULTRA);

  if (!sDidAnimate && !isInEditMode()) {
    sDidAnimate = true;

    final ValueAnimator animator = ValueAnimator.ofFloat(1, 0);
    animator.addUpdateListener(anim -> setLetterSpacing((Float) anim.getAnimatedValue()));
    animator.setStartDelay(500L);
    animator.setDuration(2000L);
    animator.setInterpolator(new BounceInterpolator());
    animator.start();

    setAlpha(0);
    final ValueAnimator alphaAnimator = ObjectAnimator.ofFloat(this, View.ALPHA, 0, 1);
    alphaAnimator.setStartDelay(500L);
    alphaAnimator.setDuration(1000L);
    alphaAnimator.setInterpolator(new FastOutSlowInInterpolator());
    alphaAnimator.start();
  }
}