Android 如何使用异步任务动态设置微调器中的内容？

我是android新手。我正在尝试从数据库获取spinner中的数据。但我不知道为什么我的列表没有设置在spinner中

我的代码是

public class AddBasicDetail extends Fragment implements AdapterView.OnItemSelectedListener {

    // array list for spinner adapter
    private ArrayList<State> categoriesList;
    ProgressDialog pDialog;

    Spinner sp_state;
    // API urls
    // Url to create new category
    private String URL_NEW_CATEGORY = "http://mandirdekhoo.com/app/md_eng/state.php";

    public AddBasicDetail() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View v = inflater.inflate(R.layout.add_basic_detail, container, false);

        sp_state = (Spinner) v.findViewById(R.id.sp_state);
        categoriesList = new ArrayList<State>();

        // spinner item select listener
        //sp_state.setOnItemSelectedListener((AdapterView.OnItemSelectedListener) getActivity());

        new GetCategories().execute();

        return v;
    }

    /**
    * Adding spinner data
    * */
    private void populateSpinner() {
         List<String> lables = new ArrayList<String>();

         //txtCategory.setText("");

         for (int i = 0; i < categoriesList.size(); i++) {
              lables.add(categoriesList.get(i).getName());
         }

         // Creating adapter for spinner
         ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(getContext(),
                        android.R.layout.simple_spinner_item, lables);

         // Drop down layout style - list view with radio button
         spinnerAdapter                           .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

         // attaching data adapter to spinner
         sp_state.setAdapter(spinnerAdapter);
    }

    /**
    * Async task to get all food categories
    * */
    private class GetCategories extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(getContext());
            pDialog.setMessage("Fetching food categories..");
            pDialog.setCancelable(false);
            pDialog.show();

        }

        @Override
        protected Void doInBackground(Void... arg0) {
            ServiceHandler jsonParser = new ServiceHandler();
            String json = jsonParser.makeServiceCall(URL_NEW_CATEGORY, ServiceHandler.GET);

            Log.e("Response: ", "> " + json);

            if (json != null) {

                try {
                    JSONObject jsonObj = new JSONObject(json);
                    Log.e("my response: ", "> " + jsonObj);
                    if (jsonObj != null) {
                        JSONArray categories = jsonObj                                            .getJSONArray("result");

                                for (int i = 0; i < categories.length(); i++) {
                                    JSONObject catObj = (JSONObject) categories.get(i);
                                    State cat = new State(catObj.getInt("id"),
                                            catObj.getString("state_name"));
                                    categoriesList.add(cat);
                                }
                            }

                        } catch (JSONException e) {
                            e.printStackTrace();
                        }

                    } else {
                        Log.e("JSON Data", "Didn't receive any data from server!");
                    }

                    return null;
                }

                @Override
                protected void onPostExecute(Void result) {
                    super.onPostExecute(result);
                    if (pDialog.isShowing())
                        pDialog.dismiss();
                    //populateSpinner();
                }

            }
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                    Toast.makeText(
                        getContext(),
                        parent.getItemAtPosition(position).toString() + " Selected" ,
                        Toast.LENGTH_LONG).show();

            }

            @Override
            public void onNothingSelected(AdapterView<?> arg0) {
            }
        }

---

请帮助

嘿，在获得正确响应后，尝试添加此代码

例如，我正在尝试硬编码值。用json替换它

   final List<String> yourlist=new ArrayList<String>();
    yourlist.add("Item 1");
    yourlist.add("Item 2");
    yourlist.add("Item 3");
    yourlist.add("Item 4");
    yourlist.add("Item 5");  
final Spinner sp1= (Spinner) findViewById(R.id.spinner1);
final Spinner sp2= (Spinner) findViewById(R.id.spinner2);

ArrayAdapter<String> adp1=new ArrayAdapter<String>(this,
                    android.R.layout.simple_list_item_1,yourlist);
    adp1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    sp1.setAdapter(adp1);

final List yourlist=new ArrayList（）；
添加（“第1项”）；
添加（“第2项”）；
添加（“第3项”）；
添加（“第4项”）；
添加（“第5项”）；
最终微调器sp1=（微调器）findViewById（R.id.spinner1）；
最终微调器sp2=（微调器）findViewById（R.id.spinner2）；
ArrayAdapter adp1=新的ArrayAdapter（此，
android.R.layout.simple\u list\u item\u 1，yourlist）；
adp1.setDropDownViewResource（android.R.layout.simple\u微调器\u下拉菜单\u项）；
设置适配器（adp1）；

---

希望这有帮助。：

像这样改变你的方法

private void populateSpinner(List<String> categoriesList) {
  List<String> lables = new ArrayList<String>();


 for (int i = 0; i < categoriesList.size(); i++) {
     lables.add(categoriesList.get(i).getName());
 }

 // Creating adapter for spinner
 ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(getContext(),
        android.R.layout.simple_spinner_item, lables);

 // Drop down layout style - list view with radio button
 spinnerAdapter
        .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    // attaching data adapter to spinner
    sp_state.setAdapter(spinnerAdapter);
}

---

希望这将帮助您

在

Log.e（“Response:”，“>”+json）中从服务器获得什么行？从onPostExecute（）01-11 10:10:51.870 2471-2531/？E/Response:：>{result:[{id:“1”，“州名”：“阿萨姆”，“州名”：“成功”，“状态”：1}，{id:“2”，“州名”：“比哈尔”，“州名”：“成功”，“状态”：1}，{id:“3”，“州名”：“昌迪加尔”，“州名”：“成功”，“状态”：1}，{id:“4”，“州名”：“恰蒂斯加尔”，“msg:“成功”，“状态”：1}，{id:“5”，“州名”：“德里”，“州名”：“成功”，“status”：1}，{“id”：“6”，“state_name”：“Gujarat”，“msg”：“Successfully”，“status”：1}，{“id”：“7”，“state_name”：“Haryana”，“msg”：“Successfully”，“status”：1}，{“id”：“8”，“state_name”：“查谟和克什米尔”，“msg”：“Successfully”，“status”：1}]}httpclient已被弃用，您还有其他一些库。我想您还没有在onPostExecute（）中调用populateSpinner（）；
   final List<String> yourlist=new ArrayList<String>();
    yourlist.add("Item 1");
    yourlist.add("Item 2");
    yourlist.add("Item 3");
    yourlist.add("Item 4");
    yourlist.add("Item 5");  
final Spinner sp1= (Spinner) findViewById(R.id.spinner1);
final Spinner sp2= (Spinner) findViewById(R.id.spinner2);

ArrayAdapter<String> adp1=new ArrayAdapter<String>(this,
                    android.R.layout.simple_list_item_1,yourlist);
    adp1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    sp1.setAdapter(adp1);

private void populateSpinner(List<String> categoriesList) {
  List<String> lables = new ArrayList<String>();


 for (int i = 0; i < categoriesList.size(); i++) {
     lables.add(categoriesList.get(i).getName());
 }

 // Creating adapter for spinner
 ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(getContext(),
        android.R.layout.simple_spinner_item, lables);

 // Drop down layout style - list view with radio button
 spinnerAdapter
        .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    // attaching data adapter to spinner
    sp_state.setAdapter(spinnerAdapter);
}

  @Override
protected void onPostExecute(Void result) {
    super.onPostExecute(result);
    if (pDialog.isShowing())
        pDialog.dismiss();
    populateSpinner(categoriesList);
}