MaterialViewPagerImageHelper.java 文件源码

public static void fadeIn(View view, float alpha, int fadeDuration, ViewPropertyAnimatorListenerAdapter listener) {
    //fade to alpha=0
    ViewCompat.animate(view)
        .alpha(alpha)
        .setDuration(fadeDuration)
        .withLayer()
        .setInterpolator(new AccelerateInterpolator())
        .setListener(listener);
}