【java.lang.IllegalStateException: Fragment TeacherFragment{435adeb0} is not currently in the FragmentManager】

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Java . lang . illegalstateexception:Fragment teacher Fragment { 435 adeb 0 }当前不在Fragment manager Java . lang . illegalstateexception:Fragment teacher Fragment { 435 adeb 0 }简介当前不在片段管理器中:java.lang.runtimeexception:无法暂停活动{...主活动}: java.lang.illegalstateex

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