Android拖拽GridView效果, 长按可拖拽和item实时交换，也就是Android手机主界面的图标列表拖拽功能的实现，内含演示效果，大部分android手机已自带此种效果，本演示是用自己的方法重写拖拽，对学习Android界面设计的朋友来说是相当有帮助的。-Android GridView drag effect, long press to drag and item real-time exchange, which is the main interface to achieve Android phones drag and drop icons list, containing demonstration effect, most of the android phones have built this effect, this presentation is rewriting drag own way, to learn Android interface design is quite helpful friend' s.