Android.widget,textView cannot be cast to android.widget.button

是ADT的问题

Project -> Clean 

清理一下项目

参考链接:https://blog.csdn.net/chunyang_guo/article/details/14125229

https://blog.csdn.net/ggbb190/article/details/34859639

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转载自blog.csdn.net/salmonwilliam/article/details/87884232