Android View显示隐藏渐变动画

public static void fadeIn(final View view) {
    if (view.getVisibility() == View.VISIBLE) {
        return;
    }
    Animation animation = new AlphaAnimation(0F, 1F);
    animation.setDuration(500);
    animation.setAnimationListener(new Animation.AnimationListener() {
        @Override
        public void onAnimationStart(Animation animation) {

        }

        @Override
        public void onAnimationEnd(Animation animation) {
            view.setEnabled(true);
        }

        @Override
        public void onAnimationRepeat(Animation animation) {

        }
    });
    view.startAnimation(animation);
    view.setVisibility(View.VISIBLE);
}

public static void fadeOut(final View view) {
    if (view.getVisibility() != View.VISIBLE) {
        return;
    }

    // Since the button is still clickable before fade-out animation
    // ends, we disable the button first to block click.
    view.setEnabled(false);
    Animation animation = new AlphaAnimation(1F, 0F);
    animation.setDuration(500);
    animation.setAnimationListener(new Animation.AnimationListener() {
        @Override
        public void onAnimationStart(Animation animation) {

        }

        @Override
        public void onAnimationEnd(Animation animation) {
            view.setVisibility(View.GONE);
        }

        @Override
        public void onAnimationRepeat(Animation animation) {

        }
    });
    view.startAnimation(animation);
}

使用：

            //llcPeakValley.setVisibility(View.GONE);
            AnimationUtil.fadeOut(llcPeakValley);

            //llcPeakValley.setVisibility(View.VISIBLE);
            AnimationUtil.fadeIn(llcPeakValley);

转载：Android View显示隐藏渐变动画 - 简书 (jianshu.com)