getActivity在某些根深蒂固的设备onActivityCreated片段返回null

问题描述

我的大部分设备，但一​​些根深蒂固设备上的应用程序做工精细。在片段的 onActivityCreated getActivity 保留返回null。我需要的上下文类下面设置的东西。

因此​​，任何人能帮助我吗？

更新

 公共类BaseProductFragment扩展片段{...公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，
        捆绑savedInstanceState）{
    查看rootView = inflater.inflate（layout_id，集装箱，
            假）;
    返回rootView;
}公共无效onActivityCreated（最终捆绑savedInstanceState）{
    super.onActivityCreated（savedInstanceState）;
    ImageCacheParams cacheParams =新ImageCacheParams（getActivity（）
            Utils.PRODUCTS_CACHE_DIR）;
    ....
}
 

解决方案

getActivity 可能返回空如果尤其是在像方位的变化，因为活性被破坏的配置变化中的 onActivityCreated ...从...所谓的移动初始化 onAttach ...

  @覆盖
公共无效onAttach（活动活动）{
    super.onAttach（活动）;
    //初始化这里
}
 

onActivityCreated 是一个调用时父活动的的onCreate 叫...但是请记住，它可能是重建，一个配置变化中被摧毁

My app work fine on most device but some rooted device. In fragment onActivityCreated, getActivity keep return null. I need Context class to to set up thing below.

So anyone can help me?

Update

public class BaseProductFragment extends Fragment {

...

public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View rootView = inflater.inflate(layout_id, container,
            false);
    return rootView;
}

public void onActivityCreated(final Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    ImageCacheParams cacheParams = new ImageCacheParams(getActivity(),
            Utils.PRODUCTS_CACHE_DIR);
    ....
}

解决方案

getActivity "might" return null if called from within onActivityCreated...especially during a configuration change like orientation change because the activity gets destroyed...move that initialization to onAttach...

@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
    //initialize here
}

onActivityCreated is a called when the parent activity's onCreate is called...but remember that it could be "recreated", destroyed during a config change

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