【Debug-Fragment】Fragment has not been attached yet

最新推荐文章于 2023-02-02 17:53:56 发布

dandelionela

最新推荐文章于 2023-02-02 17:53:56 发布

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分类专栏： Debug 文章标签： Debug

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本文详细解析了在Android开发中遇到的FragmentHasNotBeenAttachedYet异常，探讨了异常产生的原因，并提供了有效的解决方案。通过添加isAdded()判断，避免在Fragment未attach时调用getChildFragmentManager()，确保应用稳定运行。

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java.lang.IllegalStateException: Fragment has not been attached yet.
        at android.support.v4.app.Fragment.instantiateChildFragmentManager(Fragment.java:2383)
        at android.support.v4.app.Fragment.getChildFragmentManager(Fragment.java:845)
        at xxx.assistant.fragment.xxxxxFragment.getRecyclerView(xxxxxFragment.java:72)
        at xxx.assistant.fragment.xxxxxFragment.startRecyclerView(xxxxxFragment.java:195)
        at vertu.assistant.fragment.xxxxxFragment.access$500(xxxxxFragment.java:33)
        at xxx.assistant.fragment.xxxxxFragment$4.onRequestxxSuccess(xxxxFragment.java:136)
        at vertu.assistant.request.xxRequest$1.onResponse(xxxxxxxxxx.java:209)

出问题的代码：

FragmentManager childFragmentManager = getChildFragmentManager();
GridLayoutManager gridLayoutManager = new GridLayoutManager(getContext(), 2);
recyclerView.setLayoutManager(gridLayoutManager);
XXXRecyclerAdapter adapter = new XXXRecyclerAdapter(getContext(), childFragmentManager, mList, mBannerLists, new IXXRecyclerUpdateCallback() {
...

参考：https://stackoverflow.com/questions/43562394/fragment-has-not-been-attached-yet

应该是操作了没有attach的Fragment，需要判断下if(mFragment.isAdded()){ //do }

于是在“getChildFragmentManager()”前添加判断：