我已经根据Tavi Ramada（Android JSON解析教程）http://www.androidhive.info/2012/01/android-json-parsing-tutorial/的教程实现了一个listview，它完美地工作但是我想在listview的左侧添加一个图像来显示产品图像。
这是我创建的网络服务的链接： http://sheloappwebservices.axikmobile.com/getjson.php
这是我的主要活动代码：
package com.example.myapp;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
public class JSONSheloActivity extends ListActivity {
private ProgressDialog pDialog;
// URL to get contacts JSON
private static String url = "http://sheloappwebservices.axikmobile.com/getjson.php/";
// JSON Node names
private static final String TAG_PRODUCTOS = "productos";
private static final String TAG_ID = "id";
private static final String TAG_CLAVE = "clave";
private static final String TAG_NOMBRE = "nom_prod";
private static final String TAG_TITULO = "titulo_1";
private static final String TAG_SUBTITULO1 = "subtitulo_1";
private static final String TAG_SUBTITULO2 = "subtitulo_2";
private static final String TAG_PROP1 = "prop_1";
private static final String TAG_PROP2 = "prop_2";
private static final String TAG_PROP3 = "prop_3";
private static final String TAG_PROP4 = "prop_4";
private static final String TAG_PROP5 = "prop_5";
private static final String TAG_PROP6 = "prop_6";
private static final String TAG_PROP7 = "prop_7";
private static final String TAG_PROP8 = "prop_8";
private static final String TAG_PROP9 = "prop_9";
private static final String TAG_PROP10 = "prop_10";
private static final String TAG_PROP11 = "prop_11";
private static final String TAG_PRECIO = "precio_prod";
private static final String TAG_CONTENIDO = "contenido_prod";
private static final String TAG_NOTA = "notamed_prod";
private static final String TAG_CATEGORIA = "categ_prod";
private static final String TAG_IMAGEN = "img_prod";
// contacts JSONArray
JSONArray productos = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> productList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activityjson_main);
productList = new ArrayList<HashMap<String, String>>();
ListView lv = getListView();
// Listview on item click listener
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String nom_prod = ((TextView) view.findViewById(R.id.nom_prod))
.getText().toString();
String titulo_1 = ((TextView) view.findViewById(R.id.titulo_1))
.getText().toString();
String precio_prod = ((TextView) view.findViewById(R.id.precio_prod))
.getText().toString();
// Starting single contact activity
Intent in = new Intent(getApplicationContext(),
SingleContactActivity.class);
in.putExtra(TAG_NOMBRE, nom_prod);
in.putExtra(TAG_TITULO, titulo_1);
in.putExtra(TAG_PRECIO, precio_prod);
startActivity(in);
}
});
// Calling async task to get json
new GetContacts().execute();
}
/**
* Async task class to get json by making HTTP call
* */
private class GetContacts extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(JSONSheloActivity.this);
pDialog.setMessage("Cargando productos...");
// pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
productos = jsonObj.getJSONArray(TAG_PRODUCTOS);
// looping through All Products
for (int i = 0; i < productos.length(); i++) {
JSONObject c = productos.getJSONObject(i);
String nombre = c.getString(TAG_NOMBRE);
String titulo = c.getString(TAG_TITULO);
String precio = c.getString(TAG_PRECIO);
// Phone node is JSON Object
/* JSONObject phone = c.getJSONObject(TAG_PHONE);
String mobile = phone.getString(TAG_PHONE_MOBILE);
String home = phone.getString(TAG_PHONE_HOME);
String office = phone.getString(TAG_PHONE_OFFICE); */
// tmp hashmap for single contact
HashMap<String, String> product_info = new HashMap<String, String>();
// adding each child node to HashMap key => value
product_info.put(TAG_NOMBRE, nombre);
product_info.put(TAG_TITULO, titulo);
product_info.put(TAG_PRECIO, precio);
// adding contact to contact list
productList.add(product_info);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
JSONSheloActivity.this, productList,
R.layout.listajson_item, new String[] {TAG_NOMBRE, TAG_TITULO,
TAG_PRECIO }, new int[] {R.id.nom_prod,
R.id.titulo_1, R.id.precio_prod });
setListAdapter(adapter);
}
}
}
如何为列表视图添加图像并显示它？任何有关这方面的反馈将不胜感激。谢谢
答案 0 :(得分：0)
您需要为此实现自己的自定义适配器，并覆盖适配器中的$("body").append('<div id="jquery-cookie-law-script" class="' + this.options.style +' ' + this.options.location + ' ' + position + '">'+ cookieInfoMore + cookieInfoMain + '</div>');
方法以根据需要修改列表项。这是实现此类行为http://www.vogella.com/tutorials/AndroidListView/article.html#ownadapter
答案 1 :(得分：0)