fragment里面getActivity为空怎么解决?

Question

报错log getCurrentActivity==null06-25 11:55:15.653 15985-15985/com.turing.turingsdksample I/cao: onCancel OnHttpRequestListenerparse data failed .please check connect network 06-25 11:55:15.653 15985-15985/com.turing.turingsdksample W/System.err: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.Activity.runOnUiThread(java.lang.Runnable)' on a null object reference06-25 11:55:15.654 15985-15985/com.turing.turingsdksample W/System.err:     at com.turing.turingsdksample.fragment.AllFragment.operateHttpCallback(AllFragment.java:487)06-25 11:55:15.654 15985-15985/com.turing.turingsdksample W/System.err:     at com.turing.turingsdksample.fragment.AllFragment.access$1800(AllFragment.java:106)06-25 11:55:15.654 15985-15985/com.turing.turingsdksample W/System.err:     at com.turing.turingsdksample.fragment.AllFragment$7.onSuccess(AllFragment.java:611)06-25 11:55:15.654 15985-15985/com.turing.turingsdksample W/System.err:     at com.turing.semantic.SemanticManager$1.onSuccess(SemanticManager.java:102)