java - 无法为 fragment 中的微调适配器解析构造函数

我有一个带有选项卡的活动“ ActivityBeamRec”，其中有两个片段，在第二个片段中，当我尝试添加微调器时发生错误，这是片段代码

public  class FragBeamRec extends Fragment  {

        public static FragBeamRec newInstance() {
        FragBeamRec fragment = new FragBeamRec();
        return fragment;
             }

        public FragBeamRec() {
    }
    static  EditText tasss = null;
    static EditText tass1 = null;
    static  Spinner spinAs = null;
    static Spinner spinAs1 = null;

    static  ArrayAdapter<String> adapter;

    @Override
    public View onCreateView(  LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
       final   View v = inflater.inflate(R.layout.fragment_frag_beam_rec, container, false);
        ArrayList<String> list = new ArrayList<>();
        list.add(0,"");
        list.add(1,"");
        list.add(2,"");
        spinAs  = (Spinner)v.findViewById(R.id.spinner);
        spinAs1 = (Spinner)v.findViewById(R.id.spinner2);
        adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, list);
            spinAs.setAdapter(adapter);

            return v;
    }

}

我尝试使用由ActivityBeamRec.this插入的this，但结束时出现错误“ ActivityBeamRec不是封闭类”。

最佳答案

改变这个

    adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, list);

至

    adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_spinner_item, list);

参数必须是上下文。使用getActivity()。 http://developer.android.com/reference/android/app/Fragment.html#getActivity%28%29

到评论

 spinner.setOnItemSelectedListener(new OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> arg0, View arg1,
                int arg2, long arg3) {


        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub

        }
    });