androidでクリックしたリストアイテムから文字列Idを受け取ることができません

Question

クリックしたlistItemから変数Idの値を受け取り、他のアクティビティで渡したいと思います。変数には何も表示されません。ここで は付属のコードです：

MainActivity.java

package com.example.hp.citysearchapp; 

      import android.app.ProgressDialog; 
      import android.content.Intent; 
      import android.support.design.widget.TextInputLayout; 
      import android.support.v7.app.AppCompatActivity; 
      import android.os.Bundle; 
      import android.support.v7.view.menu.ExpandedMenuView; 
      import android.util.Log; 
      import android.view.View; 
      import android.widget.AdapterView; 
      import android.widget.EditText; 
      import android.widget.ImageView; 
      import android.widget.ListView; 
      import android.widget.TextView; 
      import android.widget.Toast; 

      import com.android.volley.Response; 
      import com.android.volley.VolleyError; 
      import com.android.volley.VolleyLog; 
      import com.android.volley.toolbox.JsonArrayRequest; 

      import org.json.JSONArray; 
      import org.json.JSONException; 
      import org.json.JSONObject; 

      import java.util.ArrayList; 
      import java.util.HashMap; 
      import java.util.List; 

    public class MainActivity extends AppCompatActivity { 

     private static final String TAG = MainActivity.class.getSimpleName(); 
     private ProgressDialog pDialog; 
     private List<City> cityList = new ArrayList<City>(); 
     private ListView listView; 
     private static String url; 
     ImageView searchIcon; 
     String idGet; 
     String edittextSearch; 
     TextInputLayout searchLayout; 
     EditText search; 
     private CustomListAdapter adapter; 

     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_main); 
      listView = (ListView)findViewById(R.id.city_listView); 
      searchLayout=(TextInputLayout)findViewById(R.id.input_layout_search); 
      search=(EditText)findViewById(R.id.input_search); 
      searchIcon=(ImageView)findViewById(R.id.imageView); 
      adapter = new CustomListAdapter(this,cityList); 
      searchIcon.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        edittextSearch=search.getText().toString(); 
        Log.d("hello2", search.getText().toString()); 
        adapter.notifyDataSetChanged(); 
        url = "http://test.maheshwari.org/services/testwebservice.asmx/SuggestCity?tryValue="+edittextSearch; 
        parsingMethod(); 
       } 
      }); 

      listView.setAdapter(adapter); 


      listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
       @Override 
       public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
        Intent intent = new Intent(MainActivity.this,CityDetailsActivity.class); 
        City city = cityList.get(position); 


        idGet=city.getId(); 
        Log.d("dfjdkfj", idGet);  //Not receiving anything ,here is the problem 


        intent.putExtra("gettingId",idGet); 
        startActivity(intent); 
       } 
      }); 
          } 

     private void parsingMethod() { 

      Log.d("hello", url); 
      pDialog = new ProgressDialog(this); 
      // Showing progress dialog 
      pDialog.setMessage("Loading..."); 
      pDialog.show(); 

      // Creating volley request obj 
      JsonArrayRequest cityReq = new JsonArrayRequest(url, 
        new Response.Listener<JSONArray>() { 

         @Override 
         public void onResponse(JSONArray jsonArray) { 
          hidePDialog(); 

          // Parsing json 
          for (int i = 0; i < jsonArray.length(); i++) { 

           JSONObject obj = null; 
           try { 
            obj = jsonArray.getJSONObject(i); 
           } catch (JSONException e) { 
            e.printStackTrace(); 
           } 
           City city = new City(); 
           try { 
            city.setId(obj.getString("Id")); 
            city.setTitle(obj.getString("Title")); 
            city.setDescription(obj.getString("Description")); 
            city.setExv1(obj.getString("ExtraValue1")); 
            Log.d("hello",obj.getString("ExtraValue1")); 
            city.setExv2(obj.getString("ExtraValue2")); 
            city.setExv3(obj.getString("ExtraValue3")); 
            city.setExv4(obj.getString("ExtraValue4")); 
            city.setExv5(obj.getString("ExtraValue5")); 
            city.setExv6(obj.getString("ExtraValue6")); 
            city.setExv7(obj.getString("ExtraValue7")); 
            city.setExv8(obj.getString("ExtraValue8")); 
            city.setExv9(obj.getString("ExtraValue9")); 

            cityList.add(city); 
           } catch (JSONException e) { 
            e.printStackTrace(); 
           } 


          } 

          // notifying list adapter about data changes 
          // so that it renders the list view with updated data 
          adapter.notifyDataSetChanged(); 
         } 

        }, new Response.ErrorListener() 

      { 
       @Override 
       public void onErrorResponse (VolleyError error){ 
        VolleyLog.d(TAG, "Error: " + error.getMessage()); 
        hidePDialog(); 

       } 

      }); 


      // Adding request to request queue 
      AppController.getInstance().addToRequestQueue(cityReq); 
     } 

     @Override 
     public void onDestroy() { 
      super.onDestroy(); 
      hidePDialog(); 
     } 

     private void hidePDialog() { 
      if (pDialog != null) { 
       pDialog.dismiss(); 
       pDialog = null; 
      } 
     } 


    } 

City.java

package com.example.hp.citysearchapp; 

    /** 
    * Created by hp on 22-03-2016. 
    */ 
    public class City { 
     String title,description,exv1,exv3,exv6,id,exv2,exv4,exv5,exv9,exv7,exv8; 


     public City(String title, String description, String id, String exv1, String exv3, String exv6, 
        String exv2, String exv4 , String exv5 , String exv7 , String exv8 , String exv9) { 
      this.title = title; 
      this.description=description; 
      this.id=id; 
      this.exv1=exv1; 
      this.exv2=exv2; 
      this.exv3=exv3; 
      this.exv4=exv4; 
      this.exv5=exv5; 
      this.exv6=exv6; 
      this.exv7=exv7; 
      this.exv8=exv8; 
      this.exv9=exv9; 
     } 

     public City() { 

     } 

     public String getId() { 
      return id; 
     } 

     public String getExv2() { 
      return exv2; 
     } 

     public String getExv4() { 
      return exv4; 
     } 

     public String getExv5() { 
      return exv5; 
     } 

     public String getExv7() { 
      return exv7; 
     } 

     public String getExv8() { 
      return exv8; 
     } 

     public String getExv9() { 
      return exv9; 
     } 

     public String getTitle() { 
      return title; 
     } 

     public String getDescription() { 
      return description; 
     } 

     public String getExv1() { 
      return exv1; 
     } 

     public String getExv3() { 
      return exv3; 
     } 

     public String getExv6() { 
      return exv6; 
     } 

     public void setId(String id) { 
      this.id = id; 
     } 

     public void setExv2(String exv2) { 
      this.exv2 = exv2; 
     } 

     public void setExv4(String exv4) { 
      this.exv4 = exv4; 
     } 

     public void setExv5(String exv5) { 
      this.exv5 = exv5; 
     } 

     public void setExv7(String exv7) { 
      this.exv7 = exv7; 
     } 

     public void setExv8(String exv8) { 
      this.exv8 = exv8; 
     } 

     public void setExv9(String exv9) { 
      this.exv9 = exv9; 
     } 

     public void setTitle(String title) { 
      this.title = title; 
     } 

     public void setDescription(String description) { 
      this.description = description; 
     } 

     public void setExv1(String exv1) { 
      this.exv1 = exv1; 
     } 

     public void setExv3(String exv3) { 
      this.exv3 = exv3; 
     } 

     public void setExv6(String exv6) { 
      this.exv6 = exv6; 
     } 
    } 

Answer 1

これを達成するために、あなたのコードビットを変更してください -

あなたが既に持っています - -

City city = cityList.get(position); 

は今ListItemがクリックからIDを取得するには、この行を追加します - これは役立ちます

String Id = city.getExv3(); //Use one of your actual Getter methods accordingly. 

希望を！私は私のリストについては、CustomAdapterを使用していますので

Answer 2

、私は次のコードを使用する必要があります。

TextView textView = (TextView)view.findViewById(R.id.id); /*(R.id.id) is the id of the textview */ 
String gettingID=textView.getText().toString();