Question

我有一个标签式活动“ActivityBeamRec”，它有两个片段，在我尝试添加微调器时出现第二个片段错误，这里是片段代码

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ActivityBeamRec.this this但我最后输入了一个错误“ActivityBeamRec不是封闭的类”。

Answer 1

更改此

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

到

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

param需要是一个上下文。使用getActivity()。 http://developer.android.com/reference/android/app/Fragment.html#getActivity%28%29

发表评论

 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

        }
    });

Answer 2

更改此行

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

到这个

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

Answer 3

这将是help you

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

无法解析片段中的微调器适配器的构造函数

3 个答案: