Android 为什么getSystemService在使用片段时不能在适配器中工作

现在我正在尝试移植源代码，但我和github代码之间的区别在于他是由Activty制作的，但我制作了片段，所以在我修改了片段移植后，我需要在移植时修改一些代码 getSystemService方法不起作用 这件事是怎么回事

这是我的片段，它是由活动生成的，但我将其更改为片段

我不明白这不是错误，但在片段中更改活动源后，它发生了错误

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如何修复此问题？

更改这行选项卡Fragment1

 myCategoriesExpandableListAdapter = new MyCategoriesExpandableListAdapter(TabFragment1.this, parentItems, childItems, false);

对此

 myCategoriesExpandableListAdapter = new MyCategoriesExpandableListAdapter(getActivity(), parentItems, childItems, false);

和MyCategoriesExpandableListAdapter构造函数

 public MyCategoriesExpandableListAdapter(Activity activity, ArrayList<HashMap<String, String>> parentItems,
                                         ArrayList<ArrayList<HashMap<String, String>>> childItems, boolean isFromMyCategoriesFragment) {

    this.parentItems = parentItems;
    this.childItems = childItems;
    this.activity = activity;
    this.isFromMyCategoriesFragment = isFromMyCategoriesFragment;
    inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

}

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还可以将“活动类型”更改为“活动”

一个简单的修复程序。将活动转换为片段时，会发生代码更改

而不是：

inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

只是一个小小的改变：

inflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);

这是一段完整的代码

 myCategoriesExpandableListAdapter = new MyCategoriesExpandableListAdapter(getActivity(),TabFragment1.this, parentItems, childItems, false);

请在适配器中尝试此代码

public MyCategoriesExpandableListAdapter(Context context,TabFragment1 activity, ArrayList<HashMap<String, String>> parentItems,
                                     ArrayList<ArrayList<HashMap<String, String>>> childItems, boolean isFromMyCategoriesFragment) {

this.parentItems = parentItems;
this.childItems = childItems;
this.mContext= context;
this.activity = activity;
this.isFromMyCategoriesFragment = isFromMyCategoriesFragment;
inflater = LayoutInflater.from(context);
}

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使用以下语法：inflater=LayoutInflater.fromactivity；而不是inflater=LayoutFlater activity.getSystemServiceContext.LAYOUT\u inflater\u SERVICE；。它不起作用了。。LayoutInflater中android.content.Context中的getSystem无法应用于com.example.together.Fragment.TabFragment1

inflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);

 myCategoriesExpandableListAdapter = new MyCategoriesExpandableListAdapter(getActivity(),TabFragment1.this, parentItems, childItems, false);

public MyCategoriesExpandableListAdapter(Context context,TabFragment1 activity, ArrayList<HashMap<String, String>> parentItems,
                                     ArrayList<ArrayList<HashMap<String, String>>> childItems, boolean isFromMyCategoriesFragment) {

this.parentItems = parentItems;
this.childItems = childItems;
this.mContext= context;
this.activity = activity;
this.isFromMyCategoriesFragment = isFromMyCategoriesFragment;
inflater = LayoutInflater.from(context);
}