Android 基于第一个微调器如何获取第二个微调器和第三个微调器数据

从JSON我得到了服务器端响应。我还将数据设置为微调器。但根据第一个微调器项目的位置，我必须获得第二个微调器的详细信息，根据第二个微调器，我必须获得第三个微调器的详细信息。有人可以读取代码并向我发送响应吗 谢谢你

public class Send extends Fragment {

  Spinner sp1, sp2, sp3;
  Button b1, b2;
  Bitmap bmp;
  String image;
  int category_id;
  ImageView iview;
  Intent i = new Intent();

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    View v = inflater.inflate(R.layout.send, container, false);
    sp1 = (Spinner) v.findViewById(R.id.categories);
    sp2 = (Spinner) v.findViewById(R.id.selectCity);
    sp3 = (Spinner) v.findViewById(R.id.selectArea);
    b1 = (Button) v.findViewById(R.id.search);

    b1.setOnClickListener(new View.OnClickListener() {

      @Override
      public void onClick(View v) {
        MyTask task = new MyTask();
        task.execute();

        Intent i = new Intent();
        i.setComponent(new ComponentName(getActivity(), Image.class));
        i.putExtra("image", image);
        startActivity(i);
      }
    });
    b2 = (Button) v.findViewById(R.id.clear);
    new DownloadJSON().execute();
    new City().execute();
    new Area().execute();
    /* new MyTask().execute(); */
    return v;
  }

  class MyTask extends AsyncTask<Void, Void, Void> {
    String msg = "";
    URL url;

    @Override
    protected void onPreExecute() {
      // TODO Auto-generated method stub
      super.onPreExecute();
    }

    @Override
    protected Void doInBackground(Void... params) {
      // TODO Auto-generated method stub
      try {
        /*
         * URL url = new URL(
         * "http://creersoft.com/webservices/StoreService.php?categories="
         * +
         * sp1.getSelectedItem().toString()+"&city="+sp2.getSelectedItem
         * ().toString()+"&area="+sp3.getSelectedItem().toString());
         */
        url = new URL(
            "http://creersoft.com/webservices/StoreService.php?categories="
                + sp1.getSelectedItem().toString() + "&city="
                + sp2.getSelectedItem().toString() + "&area="
                + sp3.getSelectedItem().toString());

        InputStream isr = url.openStream();
        int i = isr.read();

        while (i != -1) {
          msg = msg + (char) i;
          i = isr.read();
        }

      } catch (Exception e) {
        // TODO: handle exception
        e.printStackTrace();
      }
      return null;
    }

    @Override
    protected void onPostExecute(Void result) {
      // TODO Auto-generated method stub
      super.onPostExecute(result);

      Toast.makeText(getActivity(), msg, Toast.LENGTH_LONG).show();
      try {
        JSONObject mainObject = new JSONObject(msg);

        JSONArray jsonArray = mainObject.getJSONArray("Result");
        for (int i = 0; i < jsonArray.length(); i++) {
          JSONObject subObject = jsonArray.getJSONObject(i);
          image = subObject.getString("image");

          Toast.makeText(getActivity(), image, Toast.LENGTH_LONG)
              .show();

          int id = subObject.getInt("id");
          Toast.makeText(getActivity(), id, Toast.LENGTH_LONG).show();
          String storename = subObject.getString("storename");
          Toast.makeText(getActivity(), storename, Toast.LENGTH_LONG)
              .show();
        }

      } catch (Exception e) {
        // TODO: handle exception
        e.printStackTrace();
      }
    }
  }

  // Download JSON file AsyncTask
  private class DownloadJSON extends AsyncTask<Void, Void, Void> {
    JSONObject jsonobject;
    JSONArray jsonarray;
    ArrayList<String> worldlist;
    ArrayList<WorldPopulation> world;

    /*
     * ArrayList<String> listnew; ArrayList<String> sp;
     */

    ProgressDialog pDialog;

    @Override
    protected void onPreExecute() {
      // TODO Auto-generated method stub
      super.onPreExecute();

      pDialog = new ProgressDialog(getActivity());
      pDialog.setMessage("Fetching food categories..");
      pDialog.setCancelable(false);
      pDialog.show();
    }

    @Override
    protected Void doInBackground(Void... params) {
      // Locate the WorldPopulation Class
      world = new ArrayList<WorldPopulation>();

      worldlist = new ArrayList<String>();

      jsonobject = JSONfunctions
          .getJSONfromURL("http://creersoft.com/webservices/getcategory.php");

      try {
        JSONObject maJsonObject = jsonobject.getJSONObject("Response");
        JSONArray jsonArray = maJsonObject.getJSONArray("Result");
        for (int i = 0; i < jsonArray.length(); i++) {
          jsonobject = jsonArray.getJSONObject(i);
           category_id=jsonobject.getInt("id");
           Toast.makeText(getActivity(), category_id, Toast.LENGTH_LONG).show();               

          WorldPopulation worldpop = new WorldPopulation();

          worldpop.setId(jsonobject.optInt("id"));
          worldpop.setName(jsonobject.optString("name"));

          world.add(worldpop);

          // Populate spinner with country names
          worldlist.add(jsonobject.optString("name"));

        }
      } catch (Exception e) {
        Log.e("Error", e.getMessage());
        e.printStackTrace();
      }
      return null;
    }

    @Override
    protected void onPostExecute(Void args) {
      // Locate the spinner in activity_main.xml
      if (pDialog.isShowing())
        pDialog.dismiss();

      sp1.setAdapter(new ArrayAdapter<String>(getActivity(),
          android.R.layout.simple_spinner_dropdown_item, worldlist));          
    }
  }

  class City extends AsyncTask<Void, Void, Void> {
    JSONObject jsonobject;
    JSONArray jsonarray;
    ProgressDialog pDialog;
    ArrayList<String> worldlist;
    ArrayList<WorldPopulation> world;

    @Override
    protected void onPreExecute() {
      // TODO Auto-generated method stub
      super.onPreExecute();
      pDialog = new ProgressDialog(getActivity());
      pDialog.setMessage("Fetching Cities information..");
      pDialog.setCancelable(false);
      pDialog.show();
    }

    @Override
    protected Void doInBackground(Void... params) {
      // TODO Auto-generated method stub
      world = new ArrayList<WorldPopulation>();
      worldlist = new ArrayList<String>();
      jsonobject = JSONfunctions
          .getJSONfromURL("http://creersoft.com/webservices/getcity.php?category_id="+category_id);
      try {
        JSONObject maJsonObject = jsonobject.getJSONObject("Response");
        JSONArray jsonArray = maJsonObject.getJSONArray("Result");
        for (int i = 0; i < jsonArray.length(); i++) {
          jsonobject = jsonArray.getJSONObject(i);

          WorldPopulation worldpop = new WorldPopulation();
          worldpop.setName(jsonobject.optString("city"));

          world.add(worldpop);
          worldlist.add(jsonobject.optString("city"));
        }
      } catch (Exception e) {
        Log.e("Error", e.getMessage());
        e.printStackTrace();
      }
      return null;
    }

    @Override
    protected void onPostExecute(Void result) {
      // TODO Auto-generated method stub
      super.onPostExecute(result);
      if (pDialog.isShowing())
        pDialog.dismiss();
      sp2.setAdapter(new ArrayAdapter<String>(getActivity(),
          android.R.layout.simple_spinner_dropdown_item, worldlist));
    }
  }

  class Area extends AsyncTask<Void, Void, Void> {
    JSONObject jsonobject;
    JSONArray jsonarray;
    ProgressDialog pDialog;
    ArrayList<String> worldlist;
    ArrayList<WorldPopulation> world;

    @Override
    protected void onPreExecute() {
      // TODO Auto-generated method stub
      super.onPreExecute();
      pDialog = new ProgressDialog(getActivity());
      pDialog.setMessage("Fetching Areas Information..");
      pDialog.setCancelable(false);
      pDialog.show();
    }

    @Override
    protected Void doInBackground(Void... params) {
      // TODO Auto-generated method stub
      world = new ArrayList<WorldPopulation>();
      worldlist = new ArrayList<String>();
      jsonobject = JSONfunctions
          .getJSONfromURL("http://creersoft.com/webservices/getarea.php?category_id="+category_id+"&city_id=Lagos");
      try {
        JSONObject maJsonObject = jsonobject.getJSONObject("Response");
        JSONArray jsonArray = maJsonObject.getJSONArray("Result");
        for (int i = 0; i < jsonArray.length(); i++) {
          jsonobject = jsonArray.getJSONObject(i);

          WorldPopulation worldpop = new WorldPopulation();
          worldpop.setName(jsonobject.optString("area"));

          world.add(worldpop);
          worldlist.add(jsonobject.optString("area"));

        }
      } catch (Exception e) {
        Log.e("Error", e.getMessage());
        e.printStackTrace();
      }

      return null;
    }

    @Override
    protected void onPostExecute(Void result) {
      // TODO Auto-generated method stub
      super.onPostExecute(result);
      if (pDialog.isShowing())
        pDialog.dismiss();
      sp3.setAdapter(new ArrayAdapter<String>(getActivity(),
          android.R.layout.simple_spinner_dropdown_item, worldlist));
    }
  }      
}

---

您可以使用setOnItemSelectedListener（）

spinner.setOnItemSelectedListener（新的AdapterView.OnItemSelectedListener（）{
@凌驾
已选择公共视图（AdapterView arg0、视图arg1、内部arg2、长arg3）{
String items=spinner.getSelectedItem（）.toString（）；
Log.i（“选定项：”，项）；
}
@凌驾
未选择公共无效（AdapterView arg0）{
}
});

请搜索有关

查看.性能单击（）

。我想这会解决你的问题

---

加载第一个

微调器

数据时，将位置保存在临时变量中，并调用

performclick（）

以获取下一个按钮，依此类推。

使用setOnItemSelectedListener。第一个微调器的第一个载荷值。然后，在第二个喷丝器的onitemSelected中，您将根据pos调用wedservice加载第二个喷丝器的值获得第一个喷丝器的pos selected，同样，在第二个喷丝器的onitemSelected中，您可以调用webservice获取第三个喷丝器的值感谢回复用户2564055。我尝试了SetonimSelected，但没有得到输出。除了这个，还有人能给我建议吗。user2564055你能告诉我你用实际的方式告诉我的吗？DevManu我也尝试了这个，但仍然没有得到输出。你能给我发一个关于这个的简短代码吗。首先告诉我你所有的任务都是独立的，您正在调用oncreate（）方法中的所有任务。但我认为每个任务都依赖于其他任务，所以在调用第一个任务的onPostExecute（）时调用第二个任务。如果我在类别的onPostExecute中提供异步任务，我会得到空指针异常。查看您的代码，您提供了错误的类别id和城市id，它不是动态的，我认为城市id和类别id将在微调器选择之后出现。jsonobject=JSONfunctions.getJSONfromURL（“）；

Spinner1:{"Response":{"Success":"1","Result":[{"id":"1","name":"Groceries &   Convenience"},{"id":"2","name":"Pharmacy "},{"id":"3","name":"Fashion & Accessories"},{"id":"4","name":"Electronics"},{"id":"5","name":"Beauty & Wellness"},{"id":"6","name":"Food"},{"id":"7","name":"Books & Games"},{"id":"8","name":"For Kids"},{"id":"9","name":"Home & Living"},{"id":"10","name":"Travel & Hotels"}]}}spinner2:{"Response":{"Success":"1","Result":[{"city":"Kano"},{"city":"Lagos"}]}}spinner3:-{"Response":{"Success":"1","Result":[{"area":"Lekki"}]}}

    spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

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

            String items = spinner.getSelectedItem().toString();
            Log.i("Selected item : ", items);
        }

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

        }

    });