大家好，所以我的问题是我开发了一个Android应用程序，它使用json解析器从我的php webservice获取数据并将其显示到列表视图中，但是当我运行应用程序时它显示：
logcat的：
E/JSON Parser(1999): Error parsing data [Value Array of type java.lang.String cannot be converted to JSONObject] Array
04-02 13:46:46.982: E/JSON Parser(1079): (
04-02 13:46:46.982: E/JSON Parser(1079): [id] => 1
04-02 13:46:46.982: E/JSON Parser(1079): [dt_ini_camp] => 2012-12-22
04-02 13:46:46.982: E/JSON Parser(1079): [dt_fim_camp] => 2012-12-24
04-02 13:46:46.982: E/JSON Parser(1079): [descricao] => Apoios comunit?rios
04-02 13:46:46.982: E/JSON Parser(1079): [qtd] => 4762.000
04-02 13:46:46.982: E/JSON Parser(1079): )
04-02 13:46:46.982: E/JSON Parser(1079): Array
04-02 13:46:46.982: E/JSON Parser(1079): (
04-02 13:46:46.982: E/JSON Parser(1079): [id] => 2
04-02 13:46:46.982: E/JSON Parser(1079): [dt_ini_camp] => 2012-10-08
04-02 13:46:46.982: E/JSON Parser(1079): [dt_fim_camp] => 2012-10-10
04-02 13:46:46.982: E/JSON Parser(1079): [descricao] => Outras Campanhas
04-02 13:46:46.982: E/JSON Parser(1079): [qtd] => 3560.000
04-02 13:46:46.982: E/JSON Parser(1079): )
我的代码：
具有列表视图的活动并调用json解析器：
public class AllProductsActivity extends ListActivity {
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> productsList;
// url to get all products list
private static String url_all_products = "http://10.0.2.2/webprojecto4/index_pesagem.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_PRODUCTS = "cab_doc";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "descricao";
private static final String TAG_DATA = "dt_ini_camp";
private static final String TAG_DATA2 = "dt_fim_camp";
private static final String TAG_QTD = "qtd";
// products JSONArray
JSONArray products = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.all_products);
// Hashmap for ListView
productsList = new ArrayList<HashMap<String, String>>();
// Loading products in Background Thread
new LoadAllProducts().execute();
// Get listview
ListView lv = getListView();
// on seleting single product
// launching Edit Product Screen
// on seleting single product
// launching Edit Product Screen
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String id2 = ((TextView) view.findViewById(R.id.id)).getText()
.toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(),
EditProductActivity.class);
// sending pid to next activity
in.putExtra(TAG_ID, id);
// starting new activity and expecting some response back
startActivityForResult(in, 100);
}
});
}
// Response from Edit Product Activity
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// if result code 100
if (resultCode == 100) {
// if result code 100 is received
// means user edited/deleted product
// reload this screen again
Intent intent = getIntent();
finish();
startActivity(intent);
}
}
/**
* Background Async Task to Load all product by making HTTP Request
* */
class LoadAllProducts extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(AllProductsActivity.this);
pDialog.setMessage("Loading products. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All products from url
* */
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params);
// Check your log cat for JSON reponse
Log.d("All Products: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Products
products = json.getJSONArray(TAG_PRODUCTS);
// looping through All Products
for (int i = 0; i < products.length(); i++) {
JSONObject c = products.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_ID);
String name = c.getString(TAG_NAME);
String data = c.getString(TAG_DATA);
String data2 = c.getString(TAG_DATA2);
String qtd = c.getString(TAG_QTD);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_ID, id);
map.put(TAG_NAME, name);
map.put(TAG_DATA, data);
map.put(TAG_DATA2, data2);
map.put(TAG_QTD, qtd);
// adding HashList to ArrayList
productsList.add(map);
}
} else {
// no products found
// Launch Add New product Activity
Intent i = new Intent(getApplicationContext(),
NewProductActivity.class);
// Closing all previous activities
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
AllProductsActivity.this, productsList,
R.layout.list_item, new String[] { TAG_ID,
TAG_NAME, TAG_DATA, TAG_DATA2, TAG_QTD},
new int[] { R.id.id, R.id.descricao, R.id.data, R.id.data2, R.id.qtd });
// updating listview
setListAdapter(adapter);
}
});
}
}
}
Json Parser在此我只改变了这一行BufferedReader reader = new BufferedReader（new InputStreamReader（is，“utf-8”），8）;而不是utf-8它是iso-8859-1香港专业教育学院搜索这个错误，根据答案，我发现它说它会更好utf-8但它没有解决问题
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
// function get json from url
// by making HTTP POST or GET mehtod
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method == "POST"){
// request method is POST
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}else if(method == "GET"){
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "utf-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data [" + e.getMessage()+"] "+json);
}
// return JSON String
return jObj;
}
}
我的php服务：
<?php
/*
* Following code will list all the products
*/
// array for JSON response
$response = array();
// include db connect class
require_once __DIR__ . '/conectaDB.php';
// connecting to db
$db = new DB_CONNECT();
// get all products from products table
$result = mysql_query("select cd.id, cd.dt_ini_camp, cd.dt_fim_camp, cd.descricao, + (select sum(quantidade) from lin_doc where id_cab_doc = cd.id) as qtd from cab_doc cd where cd.id_tipo_doc = 1") or die(mysql_error());
// check for empty result
if (mysql_num_rows($result) > 0) {
// looping through all results
// products node
$response["cab_doc"] = array();
while ($row = mysql_fetch_array($result)) {
// temp user array
$product = array();
$product["id"] = $row["id"];
$product["dt_ini_camp"] = $row["dt_ini_camp"];
$product["dt_fim_camp"] = $row["dt_fim_camp"];
$product["descricao"] = $row["descricao"];
$product["qtd"] = $row["qtd"];
// push single product into final response array
array_push($response["cab_doc"], $product);
print_r($product);
}
// success
$response["success"] = 1;
// echoing JSON response
echo json_encode($response);
} else {
// no products found
$response["success"] = 0;
$response["message"] = "No products found";
// echo no users JSON
echo json_encode($response);
}
?>
请大家我真的需要帮助我没有找到问题，我发现的问题大声笑我没有找到我的问题的答案xD
答案 0 :(得分：2)
你的PHP代码中有一个print_r（），这使你的输出不是JSON。