我被困在这一段时间了。根本无法弄清楚什么是错的。一双新鲜的眼睛会非常有帮助。我继续得到org.json.JSONException：字符0处的输入结束，并且无法弄明白。
我的JSONParser
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 response = httpClient.execute(httpPost);
String responseBody = EntityUtils.toString(response.getEntity());
//HttpEntity httpEntity = httpResponse.getEntity();
//is = httpEntity.getContent();
JSONArray jsArray = new JSONArray(responseBody);
JSONObject js = jsArray.getJSONObject(0);
String returnvalmsg = js.getString("message");
String returnvalsucc = js.getString("success");
}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();
// } catch (JSONException e) {
// TODO Auto-generated catch block
//e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 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.toString());
}
// return JSON String
return jObj;
}
}
活动
btnRegisterfine.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// creating new product in background thread
new CreateNewFine().execute();
}
});
}
/**
* Background Async Task to Register Fine
* */
class CreateNewFine extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Finecalc.this);
pDialog.setMessage("Registering Fine..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Registering Fine
* */
protected String doInBackground(String... args) {
String driver = inputDriver.getText().toString();
String licencenum = inputLicence.getText().toString();
String officer = inputOfficer.getText().toString();
String speed = inputSpeed.getText().toString();
String fine= FineAppl.getText().toString();
String category = inputCategory.getText().toString();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("driver", driver));
params.add(new BasicNameValuePair("licencenum", licencenum));
params.add(new BasicNameValuePair("officer", officer));
params.add(new BasicNameValuePair("speed", speed));
params.add(new BasicNameValuePair("fine", fine));
params.add(new BasicNameValuePair("category", category));
// getting JSON Object
// Note that create product url accepts POST method
JSONObject json = jsonParser.makeHttpRequest(url_create_fine,
"POST", params);
// check log cat fro response
Log.d("Create Response", json.toString());
// check for success tag
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully Registered Fine
//Intent i = new Intent(getApplicationContext(), Finecalc.class);
//startActivity(i);
registerFine.setText("DONE");
// closing this screen
finish();
} else {
// failed to Register Fine
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog once done
pDialog.dismiss();
}
}
我的Php
<?php
// array for JSON response
$response = array();
// check for required fields
if (isset($_POST['driver'], $_POST['licencenum'], $_POST['officer'], $_POST['speed'] , $_POST['fine'],$_POST['category'])){
$driver = $_POST['driver'];
$licencenum = $_POST['licencenum'];
$officer = $_POST['officer'];
$speed = $_POST['speed'];
$fine = $_POST['fine'];
$category = $_POST['category'];
// include db connect class
require_once __DIR__ . '/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
// mysql inserting a new row
$result = mysql_query("INSERT INTO fineregister(driver,licencenum,officer,speed,fine,category) VALUES ('$driver','$licencenum','$officer','$speed','$fine', '$category')");
// check if row inserted or not
if ($result) {
// successfully inserted into database
$response["success"] = 1;
$response["message"] = "Speed Ticket Successfully Registered.";
// echoing JSON response
echo json_encode($response);
} else {
// failed to insert row
$response["success"] = 0;
$response["message"] = "Oops! An error occurred.";
// echoing JSON response
echo json_encode($response);
}
} else {
// required field is missing
$response["success"] = 0;
$response["message"] = "Required field(s) is missing";
// echoing JSON response
echo json_encode($response);
}
?>
我的错误：
08-05 09：53：03.321：W / System.err（3072）：org.json.JSONException：字符0的输入结束 08-05 09：53：03.321：W / System.err（3072）：at org.json.JSONTokener.syntaxError（JSONTokener.java:450） 08-05 09：53：03.321：W / System.err（3072）：at org.json.JSONTokener.nextValue（JSONTokener.java:97） 08-05 09：53：03.331：W / System.err（3072）：at org.json.JSONArray。（JSONArray.java:92） 08-05 09：53：03.331：W / System.err（3072）：at org.json.JSONArray。（JSONArray.java:108） 08-05 09：53：03.331：W / System.err（3072）：at com.lta.fine.JSONParser.makeHttpRequest（JSONParser.java:60） 08-05 09：53：03.341：W / System.err（3072）：at com.lta.fine.MainActivity $ CreateNewFine.doInBackground（MainActivity.java:191） 08-05 09：53：03.341：W / System.err（3072）：at com.lta.fine.MainActivity $ CreateNewFine.doInBackground（MainActivity.java:1） 08-05 09：53：03.351：W / System.err（3072）：在android.os.AsyncTask $ 2.call（AsyncTask.java:288） 08-05 09：53：03.351：W / System.err（3072）：at java.util.concurrent.FutureTask.run（FutureTask.java:237） 08-05 09：53：03.361：W / System.err（3072）：在android.os.AsyncTask $ SerialExecutor $ 1.run（AsyncTask.java:231） 08-05 09：53：03.361：W / System.err（3072）：at java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1112） 08-05 09：53：03.361：W / System.err（3072）：at java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:587） 08-05 09：53：03.361：W / System.err（3072）：at java.lang.Thread.run（Thread.java:841） 08-05 09：53：03.361：E / Buffer Error（3072）：转换结果时出错java.lang.NullPointerException：lock == null 08-05 09：53：03.371：E / JSON Parser（3072）：解析数据时出错org.json.JSONException：
字符0的输入结束
答案 0 :(得分：3)
org.json.JSONException：字符0的输入结束
通常意味着您没有获得任何JSON。您需要调试应用程序以找出原因。
与此同时，我会给你一些指示：
<强> PHP
$db变量。<?php
// array for JSON response
$response = array();
// check for required fields
if (isset($_POST['driver'], $_POST['licencenum'], $_POST['officer'], $_POST['speed'] , $_POST['fine'],$_POST['category'])){
$driver = $_POST['driver'];
$licencenum = $_POST['licencenum'];
$officer = $_POST['officer'];
$speed = $_POST['speed'];
$fine = $_POST['fine'];
$category = $_POST['category'];
// include db connect class
require_once __DIR__ . '/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
// mysql inserting a new row
$result = mysql_query("INSERT INTO fineregister(driver,licencenum,officer,speed,fine,category) VALUES ('$driver','$licencenum','$officer','$speed','$fine','$category')");
// check if row inserted or not
if ($result) {
// successfully inserted into database
$response["success"] = true;
$response["message"] = "Speed Ticket Successfully Registered.";
// echoing JSON response
} else {
// failed to insert row
$response["success"] = false;
$response["message"] = "Oops! An error occurred.";
}
} else {
// required field is missing
$response["success"] = false;
$response["message"] = "Required field(s) is missing";
}
// echoing JSON response
echo json_encode($response);
?>
<强>爪哇：
JSONObject，这已经限制了您
解析数组。而是将json作为字符串返回，然后解析它。GET你可能会将其分开
功能public String makeHttpRequest(String url, List<NameValuePair> params)
{
InputStream is = null;
String json = "";
// Making HTTP request
try {
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();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 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());
}
// return JSON String
return json;
}
<强>的AsyncTask
protected String doInBackground(String... args) {
String driver = inputDriver.getText().toString();
String licencenum = inputLicence.getText().toString();
String officer = inputOfficer.getText().toString();
String speed = inputSpeed.getText().toString();
String fine= FineAppl.getText().toString();
String category = inputCategory.getText().toString();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("driver", driver));
params.add(new BasicNameValuePair("licencenum", licencenum));
params.add(new BasicNameValuePair("officer", officer));
params.add(new BasicNameValuePair("speed", speed));
params.add(new BasicNameValuePair("fine", fine));
params.add(new BasicNameValuePair("category", category));
// getting JSON String
// Note that create product url accepts POST method
String json = jsonParser.makeHttpRequest(url_create_fine, params);
return json;
}
protected void onPostExecute(String json) {
// dismiss the dialog once done
pDialog.dismiss();
Log.d("mylog", "json = " + json);
//parse here
}
在doInbackground执行请求并将结果传递给post执行，在那里记录json对象，如果你在日志中得到任何东西就可以开始解析。使用布尔值会更容易。
try {
JSONObject jsonData = new JSONObject(json);
Boolean success = jsonData.getBoolean("success");
String message = jsonData.getString("message");
if (success) {
//success
} else {
// failed to Register Fine
}
} catch (JSONException e) {
e.printStackTrace();
}
答案 1 :(得分：0)
您的is（成员var？）未设置为POST案例。它的价值可以从以前的一些请求中遗留下来吗？
一般情况下，尽可能使用本地变量。