我想从listItem中获取变量Id的值，并将其传递给另一个activity.But我没有在变量中收到任何内容。 这是附加的代码：
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;
}
}
答案 0 :(得分：-1)
请稍微修改您的代码以实现此目的 -
你已经 -
City city = cityList.get(position);
现在添加此行以从ListItem点击 -
String Id = city.getExv3(); //Use one of your actual Getter methods accordingly.
希望这有帮助！
答案 1 :(得分：-1)
由于我在列表中使用CustomAdapter，因此我必须使用以下代码：
TextView textView = (TextView)view.findViewById(R.id.id); /*(R.id.id) is the id of the textview */
String gettingID=textView.getText().toString();