本来就是把fragment写死在activity的xml模板里面，结果报了这个错误， Unable to start activity ComponentInfo{com.example.administrator.myapplication/com.example.administrator.myapplication.MainActivity}: android.view.InflateException: Binary XML file line #0: Binary XM，，下面找到了解决方法
om.example.administrator.myapplication.MainActivity@8944841 must implement OnFragmentInteractionListener
Mainactivity必须实现OnFragmentInteractionListener这个接口
