看一下Fragment的生命周期,我不确定这里可能发生的情况。当Fragment停止活动时,有两种可能的方法。
在哪种情况下完成了两种替代方案中的哪一种?是什么决定了他们中的哪一个?如果将一个片段添加到后台堆栈中,然后删除/替换,为什么不将它丢弃?为什么要保留它?
编辑:它突然出现在我身上,是否取决于片段是否被保留?
这似乎都取决于片段是否保留。当片段被保留时,然后在onDestroyView上出现onCreateView。
保留片段时(即setRetainInstance(true)),然后旋转devicelooks时的日志如下:
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onAttach
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onCreate
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onCreateView
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onActivityCreated
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onStart
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onResume
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onPause
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onStop
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onDestroyView
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onDetach
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onAttach
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onCreateView
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onActivityCreated
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onStart
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onResume
但是当它没有被保留时,它会像这样:
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onAttach
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onCreate
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onCreateView
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onActivityCreated
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onStart
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onResume
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onPause
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onStop
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onDestroyView
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onDestroy
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onDetach
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onAttach
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onCreate
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onCreateView
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onActivityCreated
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onStart
com.example.FragmentLifecycleTestApp W/MainFragment﹕ onResume