在onCreateView（）里调用
ViewTreeObserverobserver=imageViewPicture.getViewTreeObserver();observer.addOnGlobalLayoutListener(newOnGlobalLayoutListener(){@OverridepublicvoidonGlobalLayout(){imageViewPicture.getViewTreeObserver().removeGlobalOnLayoutListener(this);}});
而不是
finalViewTreeObserverobserver=imageViewPicture.getViewTreeObserver();observer.addOnGlobalLayoutListener(newOnGlobalLayoutListener(){@OverridepublicvoidonGlobalLayout(){observer.removeGlobalOnLayoutListener(this);}});
后者有可能会出现问题
http://stackoverflow.com/questions/12867760/fragment-removeglobalonlayoutlistener-illegalstateexception
