QMUIAnimationListView.java 文件源码

protected ObjectAnimator alphaObjectAnimator(View view, final boolean fadeIn, long duration, boolean postBack) {
    final ObjectAnimator anim = ObjectAnimator.ofFloat(view, "alpha", fadeIn ? new float[]{
            0f, 1f} : new float[]{1f, 0f});

    anim.setDuration(duration);

    if (postBack) {
        final WeakReference<View> wr = new WeakReference<>(view);
        anim.addListener(new ManipulateAnimatorListener() {
            @Override
            public void onAnimationEnd(Animator animation) {
                if (wr.get() != null) {
                    wr.get().setAlpha(fadeIn ? 0 : 1);
                }
            }
        });
    }

    return anim;
}