java-我在onAttach(Context)中遇到了这个奇怪的错误

概述在onAttach函数中,eclipse显示错误说明ThemethodonAttach(Activity)inthetypeFragmentisnotapplicableforthearguments(Context)尽管很明显传递了Context类型变量importandroid.content.Context;publicclassMyListFragmentextendsFragment{priv

在onAttach函数中,eclipse显示错误说明

The method onAttach(Activity) in the type Fragment is not applicable
for the arguments (Context)

尽管很明显传递了Context类型变量

import androID.content.Context;public class MyListFragment extends Fragment{    private OnItemSelectedListener Listener;      @OverrIDe      public VIEw onCreateVIEw(LayoutInflater inflater, VIEwGroup container,          Bundle savedInstanceState) {        VIEw vIEw = inflater.inflate(R.layout.fragment_RSSList_overvIEw,            container, false);        button button = (button) vIEw.findVIEwByID(R.ID.button1);        button.setonClickListener(new VIEw.OnClickListener() {          @OverrIDe          public voID onClick(VIEw v) {            updateDetail("fake");          }        });        return vIEw;      }      public interface OnItemSelectedListener {        public voID onRSSItemSelected(String link);      }      @OverrIDe      public voID onAttach(Context context) {        super.onAttach(context);        if (context instanceof OnItemSelectedListener) {          Listener = (OnItemSelectedListener) context;        } else {          throw new ClassCastException(context.toString()              + " must implemenet MyListFragment.OnItemSelectedListener");        }      }      @OverrIDe      public voID onDetach() {        super.onDetach();        Listener = null;      }      // may also be triggered from the Activity      public voID updateDetail(String uri) {        // create a string just for testing        String newTime = String.valueOf(System.currentTimeMillis());        // inform the Activity about the change based        // interface defintion        Listener.onRSSItemSelected(newTime);      }}

解决方法:

如果您使用的是API<然后23

public voID onAttach(Context context) {

应该

public voID onAttach(Activity context) {

查看official docs

注意：

在API 23中添加了onAttach(Context context).请参见this

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