当没有满足我条件的记录时，这就是服务器返回的内容：
它显示为Log.e(TAG, json.toString());
{"comuni":[]}
当sql语句找到一些原始数据时，这就是服务器返回的内容
它显示为Log.e(TAG, json.toString());
{"comuni": [
{
"codCatastale": "D546",
"nomeComune": "Pianopoli",
"cap": "88040",
"codProvincia": "CZ"
},
{
"codCatastale": "G541",
"nomeComune": "Piana di Monte Verna",
"cap": "81013",
"codProvincia": "CE"
},
{
"codCatastale": "G542",
"nomeComune": "Piana Crixia",
"cap": "17058",
"codProvincia": "SV"
},
{
"codCatastale": "G543",
"nomeComune": "Piana degli Albanesi",
"cap": "90037",
"codProvincia": "PA"
},
{
"codCatastale": "G546",
"nomeComune": "Pian Camuno",
"cap": "25050",
"codProvincia": "BS"
},
{
"codCatastale": "G547",
"nomeComune": "Piancastagnaio",
"cap": "53025",
"codProvincia": "SI"
},
{
"codCatastale": "G549",
"nomeComune": "Piancogno",
"cap": "25052",
"codProvincia": "BS"
},
{
"codCatastale": "G551",
"nomeComune": "Piandimeleto",
"cap": "61026",
"codProvincia": "PU"
},
{
"codCatastale": "G552",
"nomeComune": "Pian di Sco",
"cap": "52026",
"codProvincia": "AR"
},
{
"codCatastale": "G553",
"nomeComune": "Piane Crati",
"cap": "87050",
"codProvincia": "CS"
},
{
"codCatastale": "G555",
"nomeComune": "Pianella",
"cap": "65019",
"codProvincia": "PE"
},
{
"codCatastale": "G556",
"nomeComune": "Pianello del Lario",
"cap": "22010",
"codProvincia": "CO"
},
{
"codCatastale": "G557",
"nomeComune": "Pianello Val Tidone",
"cap": "29010",
"codProvincia": "PC"
},
{
"codCatastale": "G558",
"nomeComune": "Pianengo",
"cap": "26010",
"codProvincia": "CR"
},
{
"codCatastale": "G559",
"nomeComune": "Pianezza",
"cap": "10044",
"codProvincia": "TO"
},
{
"codCatastale": "G560",
"nomeComune": "Pianezze",
"cap": "36060",
"codProvincia": "VI"
},
{
"codCatastale": "G561",
"nomeComune": "Pianfei",
"cap": "12080",
"codProvincia": "CN"
},
{
"codCatastale": "G564",
"nomeComune": "Pianico",
"cap": "24060",
"codProvincia": "BG"
},
{
"codCatastale": "G565",
"nomeComune": "Pianiga",
"cap": "30030",
"codProvincia": "VE"
},
{
"codCatastale": "G568",
"nomeComune": "Piano di Sorrento",
"cap": "80063",
"codProvincia": "NA"
},
{
"codCatastale": "G570",
"nomeComune": "Pianoro",
"cap": "40065",
"codProvincia": "BO"
},
{
"codCatastale": "G571",
"nomeComune": "Piansano",
"cap": "1010",
"codProvincia": "VT"
},
{
"codCatastale": "G572",
"nomeComune": "Piantedo",
"cap": "23010",
"codProvincia": "SO"
}
]
}
当发现的原始数据超过几十个时，它就会返回。有80条记录已经给出了这个错误
它显示为Log.e(TAG, "Malformed Json string: " + json.toString() + e.getMessage());
06-18 19：02：07.012 13689-13689 / com.example.alberto.easyfood E / CommunicationManager：无法解析格式错误的JSON：输入结束 在json字符串的字符0处：
就像你可以看到json字符串是空的。
<?php
/*** Opening the connection with the db ***/
include 'open_db_connection.php';
define('RESIDENCES', 'comuni');
try {
/*** Getting data ***/
$json = file_get_contents("php://input");
/*** Decoding json ***/
$data = json_decode($json, TRUE);
$residence = $data[ATTR_RESIDENCE_NAME];
if($residence != ""){
print(json_encode((getResidences($residence))));
}else return null;
} catch(Exception $e) {
echo $e->getMessage();
}
$conn = null;
/**
* Function that return an array of arrays containing information about residences begginning with the same initials letters that are passed at this functon.
* For each residence there will be also the other information like the province id.
* Parameters:
* Residence (it can be the full name or only the initials letters)
*/
function getResidences($residence){
global $conn;
/*** Preparing the SQL statement ***/
$stmt = $conn->prepare('SELECT * FROM '.TABLE_RESIDENCES.' WHERE '.ATTR_RESIDENCE_NAME.' LIKE :residence');
/*** Binding parameters ***/
$param = "$residence%";
$stmt->bindParam(':residence', $param);
/*** exceute the query ***/
$stmt->execute();
/*** Setting the type of array (in this case it will be an associative array)***/
$residences[RESIDENCES] = $stmt->FetchAll(PDO::FETCH_ASSOC);
return $residences;
}
?>
public String[] getResidences(String residence_initials, Context context){
JSONObject json = new JSONObject();
if(!residence_initials.isEmpty()){
try {
json.put(DB_RESIDENCE, residence_initials);
json = CommunicationManager.postData(URL_RESIDENCES, json);
if(json != null){
JSONArray jsonArray = json.getJSONArray(RESIDENCES);
Log.e(TAG, json.toString());
}
} catch (JSONException e) {
Log.e(TAG, "Malformed Json string: " + json.toString() + e.getMessage());
}
}
return null;
}
private static final int READ_TIMEOUT = 8000;
private static final int CONNECTION_TIMEOUT = 10000;
private static final String POST_METHOD = "POST";
public static JSONObject postData(String url, JSONObject dataToBeSent){
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
JSONObject jsonObject = null;
if(dataToBeSent != null) {
URL serverURL = null;
StringBuilder stringBuilder = new StringBuilder();
try {
serverURL = new URL(url);
/* Opening a connection */
HttpURLConnection connection = (HttpURLConnection) serverURL.openConnection();
/* Setting timeout */
connection.setReadTimeout(READ_TIMEOUT);
connection.setConnectTimeout(CONNECTION_TIMEOUT);
/* Using the POST method sending data */
connection.setRequestMethod(POST_METHOD);
connection.setDoInput(true);
connection.setDoOutput(true);
DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream());
outputStream.writeBytes(dataToBeSent.toString());
outputStream.flush();
outputStream.close();
connection.connect();
/* Getting the response */
int responseCode = connection.getResponseCode();
if(responseCode == HttpsURLConnection.HTTP_OK) {
/* If the response is a 200 http response it will get the message the server sent */
String line;
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
while ((line = bufferedReader.readLine()) != null) {
stringBuilder.append(line + '\n');
}
jsonObject = new JSONObject(stringBuilder.toString());
}
connection.disconnect();
} catch (MalformedURLException e) {
Log.e(TAG, "MalformedURLException: " + e.getMessage());
} catch (IOException e) {
Log.e(TAG, "IOException: " + e.getMessage());
} catch (JSONException e) {
Log.e(TAG, "Could not parse malformed JSON: " + e.getMessage() + "\njson string: "+ stringBuilder);
}
}
/* Return a JSON Object*/
return jsonObject;
}
答案 0 :(得分：0)
我怀疑这一行 -
JSONArray jsonArray = json.getJSONArray(RESIDENCES);
检查RESIDENCES的值必须为comuni。
希望它会有所帮助：）