unable to execute dex: multiple dex files Cocos2dxAccelerometer

原文转载：http://discuss.cocos2d-x.org/t/conversion-to-dalvik-format-failed-unable-to-execute-dex-multiple-dex-files-define-lorg-cocos2dx-lib-cocos2dxaccelerometer/6652/4

用cocos2dx2.2.3没问题，用了3.1.1出现这个问题。确实够蛋疼。还要有这个能够解决