java - setAdapter和setDropDownViewResource是IDE用红色写的

Question

IDE 说我在 setAdapter 和 setDropDownViewResource 中“无法解析符号”，我不知道为什么:

spinner.setAdapter(adapter);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

先谢谢大家了!

我发布我的代码:

public class MyListFragment extends Fragment implements
        android.widget.CompoundButton.OnCheckedChangeListener {

    ListView lv;
    ArrayList<Planet> planetList;
    static PlanetAdapter plAdapter;
    private TextView txtName;
    private TextView txtEmail;
    private Button btnLogout;
    private Spinner spinner1;
    private Spinner spinner2;

    private SQLiteHandler db;
    private SessionManager session;
    BirraAdapter biAdapter;
    PlanetAdapter.PlanetHolder holder;
    private static Context context = null;
    private static FragmentActivity mInstance;

    Integer[] imageId = {
            R.mipmap.androtuto,
            R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,
            R.mipmap.ic_launcher,
            R.mipmap.ok,
            /*R.drawable.image6,
            R.drawable.image7*/

    };
    String[] countryNames={"India","China","Australia","Portugle","America","New Zealand"};

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the custom_spinner_items for this fragment
        //super.onDestroy();

        SharedPreferences settings = getContext().getSharedPreferences("states", Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = settings.edit();
        editor.clear();
        editor.commit();
        ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_list2, container, false);
        context = getActivity();
        mInstance = getActivity();
        txtName = (TextView) rootView.findViewById(R.id.name);
        txtEmail = (TextView) rootView.findViewById(R.id.numero_telefonico);
        btnLogout = (Button) rootView.findViewById(R.id.btnLogout);

        // SqLite database handler
        db = new SQLiteHandler(context.getApplicationContext());


        // session manager
        session = new SessionManager(context.getApplicationContext());
/*

        if (!session.isLoggedIn()) {
            logoutUser();
        }
*/

        // Fetching user details from SQLite
        HashMap<String, String> user = db.getUserDetails();

        String name = user.get("name");
        //String email = user.get("email");
//      String email = user.get("email");
        String email = user.get("numero_telefonico");


        // Displaying the user details on the screen
        System.out.println(name + email);

        txtName.setText(name);
        txtEmail.setText(email);
    /*  Button mButton = (Button) rootView.findViewById(R.id.button);
        mButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                showResult(v);


            }
        });*/
        //return inflater.inflate(R.custom_spinner_items.fragment_list2, container, false);
        btnLogout.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                logoutUser();
            }
        });

    /*  List<String> spinnerArray =  new ArrayList<String>();
        spinnerArray.add("item1");
        spinnerArray.add("item2");

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

        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        Spinner sItems = (Spinner) rootView.findViewById(R.id.simpleSpinner);
        sItems.setAdapter(adapter);*/
        return rootView;
    }
    Spinner spinner = (Spinner) getView().findViewById(R.id.simpleSpinner);
    // Create an ArrayAdapter using the string array and a default spinner layout
    ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this.getContext(),
            R.array.country_arrays, android.R.layout.simple_spinner_item);
// Specify the layout to use when the list of choices appears
    //adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// Apply the adapter to the spinner
    spinner.setAdapter(adapter);

Answer 1

这是因为这些行应该位于某个方法内。你应该这样写:

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    Spinner spinner = (Spinner) getView().findViewById(R.id.simpleSpinner);
    // Create an ArrayAdapter using the string array and a default spinner layout
    ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this.getContext(),
        R.array.country_arrays, android.R.layout.simple_spinner_item);

     spinner.setAdapter(adapter);

}