the logic seems correct.
Bug was fixed:
postView cannot be shown at the list when it is the parent of the current post.
the album can be hide with closing the post.
the related post is moving with the post opening or closing.
back button to close post.
more_image can change its color as the process of the paper close and open.
touch status bug fixed: when opening post flip to foldCard. the mOpenPostSpring will get something wrong.
THe post list could be moved by horizontal touch event.