在本地，当我点击按钮＆＃34;登录＆＃34;我有这个例外吗？
> W/System.err: org.json.JSONException: Value <!DOCTYPE of type java.lang.String cannot be converted to JSONObject
这是我的代码;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;
DBConnect.php：
class DB_Connect {
private $conn;
// Connecting to database
public function connect() {
require_once 'include/Config.php';
// Connecting to mysql database
$this->conn = new mysqli(DB_HOST, DB_USER, DB_PASSWORD, DB_DATABASE);
// return database handler
return $this->conn;
}
}
DBFunction.php：
class DB_Functions {
private $conn;
// constructor
function __construct() {
require_once 'DB_Connect.php';
// connecting to database
$db = new Db_Connect();
$this->conn = $db->connect();
}
// destructor
function __destruct() {
}
/**
* Storing new user
* returns user details
*/
public function storeUser($name, $email, $password) {
$uuid = uniqid('', true);
$hash = $this->hashSSHA($password);
$encrypted_password = $hash["encrypted"]; // encrypted password
$salt = $hash["salt"]; // salt
$stmt = $this->conn->prepare("INSERT INTO users(unique_id, name, email, encrypted_password, salt, created_at) VALUES(?, ?, ?, ?, ?, NOW())");
$stmt->bind_param("sssss", $uuid, $name, $email, $encrypted_password, $salt);
$result = $stmt->execute();
$stmt->close();
// check for successful store
if ($result) {
$stmt = $this->conn->prepare("SELECT * FROM users WHERE email = ?");
$stmt->bind_param("s", $email);
$stmt->execute();
$user = $stmt->get_result()->fetch_assoc();
$stmt->close();
return $user;
} else {
return false;
}
}
/**
* Get user by email and password
*/
public function getUserByEmailAndPassword($email, $password) {
$stmt = $this->conn->prepare("SELECT * FROM users WHERE email = ?");
$stmt->bind_param("s", $email);
if ($stmt->execute()) {
$user = $stmt->get_result()->fetch_assoc();
$stmt->close();
// verifying user password
$salt = $user['salt'];
$encrypted_password = $user['encrypted_password'];
$hash = $this->checkhashSSHA($salt, $password);
// check for password equality
if ($encrypted_password == $hash) {
// user authentication details are correct
return $user;
}
} else {
return NULL;
}
}
/**
* Check user is existed or not
*/
public function isUserExisted($email) {
$stmt = $this->conn->prepare("SELECT email from users WHERE email = ?");
$stmt->bind_param("s", $email);
$stmt->execute();
$stmt->store_result();
if ($stmt->num_rows > 0) {
// user existed
$stmt->close();
return true;
} else {
// user not existed
$stmt->close();
return false;
}
}
/**
* Encrypting password
* @param password
* returns salt and encrypted password
*/
public function hashSSHA($password) {
$salt = sha1(rand());
$salt = substr($salt, 0, 10);
$encrypted = base64_encode(sha1($password . $salt, true) . $salt);
$hash = array("salt" => $salt, "encrypted" => $encrypted);
return $hash;
}
/**
* Decrypting password
* @param salt, password
* returns hash string
*/
public function checkhashSSHA($salt, $password) {
$hash = base64_encode(sha1($password . $salt, true) . $salt);
return $hash;
}
}
注册ACTIVITY.java：
public class RegisterActivity extends Activity {
private static final String TAG = RegisterActivity.class.getSimpleName();
private Button btnRegister;
private Button btnLinkToLogin;
private EditText inputFullName;
private EditText inputEmail;
private EditText inputPassword;
private ProgressDialog pDialog;
private SessionManager session;
private SQLiteHandler db;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
inputFullName = (EditText) findViewById(R.id.name);
inputEmail = (EditText) findViewById(R.id.email);
inputPassword = (EditText) findViewById(R.id.password);
btnRegister = (Button) findViewById(R.id.btnRegister);
btnLinkToLogin = (Button) findViewById(R.id.btnLinkToLoginScreen);
// Progress dialog
pDialog = new ProgressDialog(this);
pDialog.setCancelable(false);
// Session manager
session = new SessionManager(getApplicationContext());
// SQLite database handler
db = new SQLiteHandler(getApplicationContext());
// Check if user is already logged in or not
if (session.isLoggedIn()) {
// User is already logged in. Take him to main activity
Intent intent = new Intent(RegisterActivity.this,
MainActivity.class);
startActivity(intent);
finish();
}
// Register Button Click event
btnRegister.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
String name = inputFullName.getText().toString().trim();
String email = inputEmail.getText().toString().trim();
String password = inputPassword.getText().toString().trim();
if (!name.isEmpty() && !email.isEmpty() && !password.isEmpty()) {
registerUser(name, email, password);
} else {
Toast.makeText(getApplicationContext(),
"Please enter your details!", Toast.LENGTH_LONG)
.show();
}
}
});
// Link to Login Screen
btnLinkToLogin.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent i = new Intent(getApplicationContext(),
LoginActivity.class);
startActivity(i);
finish();
}
});
}
/**
* Function to store user in MySQL database will post params(tag, name,
* email, password) to register url
* */
private void registerUser(final String name, final String email,
final String password) {
// Tag used to cancel the request
String tag_string_req = "req_register";
pDialog.setMessage("Registering ...");
showDialog();
StringRequest strReq = new StringRequest(Method.POST,
AppConfig.URL_REGISTER, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "Register Response: " + response.toString());
hideDialog();
try {
JSONObject jObj = new JSONObject(response);
boolean error = jObj.getBoolean("error");
if (!error) {
// User successfully stored in MySQL
// Now store the user in sqlite
String uid = jObj.getString("uid");
JSONObject user = jObj.getJSONObject("user");
String name = user.getString("name");
String email = user.getString("email");
String created_at = user
.getString("created_at");
// Inserting row in users table
db.addUser(name, email, uid, created_at);
Toast.makeText(getApplicationContext(), "User successfully registered. Try login now!", Toast.LENGTH_LONG).show();
// Launch login activity
Intent intent = new Intent(
RegisterActivity.this,
LoginActivity.class);
startActivity(intent);
finish();
} else {
// Error occurred in registration. Get the error
// message
String errorMsg = jObj.getString("error_msg");
Toast.makeText(getApplicationContext(),
errorMsg, Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Registration Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_LONG).show();
hideDialog();
}
}) {
@Override
protected Map<String, String> getParams() {
// Posting params to register url
Map<String, String> params = new HashMap<String, String>();
params.put("name", name);
params.put("email", email);
params.put("password", password);
return params;
}
};
// Adding request to request queue
AppController.getInstance().addToRequestQueue(strReq, tag_string_req);
}
private void showDialog() {
if (!pDialog.isShowing())
pDialog.show();
}
private void hideDialog() {
if (pDialog.isShowing())
pDialog.dismiss();
}
}
登录ACTIVITY.java：
public class LoginActivity extends Activity {
private static final String TAG = RegisterActivity.class.getSimpleName();
private Button btnLogin;
private Button btnLinkToRegister;
private EditText inputEmail;
private EditText inputPassword;
private ProgressDialog pDialog;
private SessionManager session;
private SQLiteHandler db;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
inputEmail = (EditText) findViewById(R.id.email);
inputPassword = (EditText) findViewById(R.id.password);
btnLogin = (Button) findViewById(R.id.btnLogin);
btnLinkToRegister = (Button) findViewById(R.id.btnLinkToRegisterScreen);
// Progress dialog
pDialog = new ProgressDialog(this);
pDialog.setCancelable(false);
// SQLite database handler
db = new SQLiteHandler(getApplicationContext());
// Session manager
session = new SessionManager(getApplicationContext());
// Check if user is already logged in or not
if (session.isLoggedIn()) {
// User is already logged in. Take him to main activity
Intent intent = new Intent(LoginActivity.this, MainActivity.class);
startActivity(intent);
finish();
}
// Login button Click Event
btnLogin.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
String email = inputEmail.getText().toString().trim();
String password = inputPassword.getText().toString().trim();
// Check for empty data in the form
if (!email.isEmpty() && !password.isEmpty()) {
// login user
checkLogin(email, password);
} else {
// Prompt user to enter credentials
Toast.makeText(getApplicationContext(),
"Please enter the credentials!", Toast.LENGTH_LONG)
.show();
}
}
});
// Link to Register Screen
btnLinkToRegister.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent i = new Intent(getApplicationContext(),
RegisterActivity.class);
startActivity(i);
finish();
}
});
}
/**
* function to verify login details in mysql db
* */
private void checkLogin(final String email, final String password) {
// Tag used to cancel the request
String tag_string_req = "req_login";
pDialog.setMessage("Logging in ...");
showDialog();
StringRequest strReq = new StringRequest(Method.POST,
AppConfig.URL_LOGIN, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "Login Response: " + response.toString());
hideDialog();
try {
JSONObject jObj = new JSONObject(response);
boolean error = jObj.getBoolean("error");
// Check for error node in json
if (!error) {
// user successfully logged in
// Create login session
session.setLogin(true);
// Now store the user in SQLite
String uid = jObj.getString("uid");
JSONObject user = jObj.getJSONObject("user");
String name = user.getString("name");
String email = user.getString("email");
String created_at = user
.getString("created_at");
// Inserting row in users table
db.addUser(name, email, uid, created_at);
// Launch main activity
Intent intent = new Intent(LoginActivity.this,
MainActivity.class);
startActivity(intent);
finish();
} else {
// Error in login. Get the error message
String errorMsg = jObj.getString("error_msg");
Toast.makeText(getApplicationContext(),
errorMsg, Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
Toast.makeText(getApplicationContext(), "Json error: " + e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Login Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_LONG).show();
hideDialog();
}
}) {
@Override
protected Map<String, String> getParams() {
// Posting parameters to login url
Map<String, String> params = new HashMap<String, String>();
params.put("email", email);
params.put("password", password);
return params;
}
};
// Adding request to request queue
AppController.getInstance().addToRequestQueue(strReq, tag_string_req);
}
private void showDialog() {
if (!pDialog.isShowing())
pDialog.show();
}
private void hideDialog() {
if (pDialog.isShowing())
pDialog.dismiss();
}
}
这是AppConfig.java
public class AppConfig {
// Server user login url
// public static String URL_LOGIN = "http://192.168.0.102/android_login_api/login.php";
//public static String URL_LOGIN = "http://10.0.2.2:8888/android_login_api/login.php";
public static String URL_LOGIN = "http://10.0.2.2:8888/phpmyadmin/import.php#PMAURL-0:tbl_structure.php?db=android_api&table=users&server=1&target=&token=809562ca509cc18a182d0f6b0bef5485/login.php";
// Server user register url
//public static String URL_REGISTER = "http://10.0.2.2:8888/android_login_api/register.php";
public static String URL_REGISTER = "http://10.0.2.2:8888/phpmyadmin/import.php#PMAURL-0:tbl_structure.php?db=android_api&table=users&server=1&target=&token=809562ca509cc18a182d0f6b0bef5485/register.php";
}
register.php：
require_once 'include/DB_Functions.php';
$db = new DB_Functions();
// json response array
$response = array("error" => FALSE);
if (isset($_POST['name']) && isset($_POST['email']) && isset($_POST['password'])) {
// receiving the post params
$name = $_POST['name'];
$email = $_POST['email'];
$password = $_POST['password'];
// check if user is already existed with the same email
if ($db->isUserExisted($email)) {
// user already existed
$response["error"] = TRUE;
$response["error_msg"] = "User already existed with " . $email;
echo json_encode($response);
} else {
// create a new user
$user = $db->storeUser($name, $email, $password);
if ($user) {
// user stored successfully
$response["error"] = FALSE;
$response["uid"] = $user["unique_id"];
$response["user"]["name"] = $user["name"];
$response["user"]["email"] = $user["email"];
$response["user"]["created_at"] = $user["created_at"];
$response["user"]["updated_at"] = $user["updated_at"];
echo json_encode($response);
} else {
// user failed to store
$response["error"] = TRUE;
$response["error_msg"] = "Unknown error occurred in registration!";
echo json_encode($response);
}
}
} else {
$response["error"] = TRUE;
$response["error_msg"] = "Required parameters (name, email or password) is missing!";
echo json_encode($response);
}
的login.php：
require_once 'include/DB_Functions.php';
$db = new DB_Functions();
// json response array
$response = array("error" => FALSE);
if (isset($_POST['email']) && isset($_POST['password'])) {
// receiving the post params
$email = $_POST['email'];
$password = $_POST['password'];
// get the user by email and password
$user = $db->getUserByEmailAndPassword($email, $password);
if ($user != false) {
// use is found
$response["error"] = FALSE;
$response["uid"] = $user["unique_id"];
$response["user"]["name"] = $user["name"];
$response["user"]["email"] = $user["email"];
$response["user"]["created_at"] = $user["created_at"];
$response["user"]["updated_at"] = $user["updated_at"];
echo json_encode($response);
} else {
// user is not found with the credentials
$response["error"] = TRUE;
$response["error_msg"] = "Login credentials are wrong. Please try again!";
echo json_encode($response);
}
} else {
// required post params is missing
$response["error"] = TRUE;
$response["error_msg"] = "Required parameters email or password is missing!";
echo json_encode($response);
}
logcat的：
07-13 19:55:24.137 11917-11917/ W/System.err: org.json.JSONException: Value <!DOCTYPE of type java.lang.String cannot be converted to JSONObject
07-13 19:55:24.137 11917-11917/ W/System.err: at org.json.JSON.typeMismatch(JSON.java:111)
07-13 19:55:24.137 11917-11917/ W/System.err: at org.json.JSONObject.<init>(JSONObject.java:158)
07-13 19:55:24.137 11917-11917/ W/System.err: at org.json.JSONObject.<init>(JSONObject.java:171)
07-13 19:55:24.137 11917-11917/ W/System.err: at info.androidhive.loginandregistration.activity.RegisterActivity$3.onResponse(RegisterActivity.java:127)
07-13 19:55:24.137 11917-11917/ W/System.err: at info.androidhive.loginandregistration.activity.RegisterActivity$3.onResponse(RegisterActivity.java:119)
07-13 19:55:24.137 11917-11917/ W/System.err: at com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:60)
07-13 19:55:24.137 11917-11917/ W/System.err: at com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:30)
07-13 19:55:24.137 11917-11917/ W/System.err: at com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:99)
07-13 19:55:24.137 11917-11917/ W/System.err: at android.os.Handler.handleCallback(Handler.java:605)
07-13 19:55:24.137 11917-11917/ W/System.err: at android.os.Handler.dispatchMessage(Handler.java:92)
07-13 19:55:24.137 11917-11917/ W/System.err: at android.os.Looper.loop(Looper.java:137)
07-13 19:55:24.137 11917-11917/ W/System.err: at android.app.ActivityThread.main(ActivityThread.java:4424)
07-13 19:55:24.137 11917-11917/W/System.err: at java.lang.reflect.Method.invokeNative(Native Method)
07-13 19:55:24.137 11917-11917/ W/System.err: at java.lang.reflect.Method.invoke(Method.java:511)
07-13 19:55:24.137 11917-11917/ W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
07-13 19:55:24.137 11917-11917/ W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
07-13 19:55:24.137 11917-11917/ W/System.err: at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：0)
json_encode()然后尝试解析它。它将解决您的问题。
答案 1 :(得分：0)
我遇到了同样的情况，我为它创建了模块。我附加了一个示例代码，如何将json对象从php恢复到android。 你的PHP代码必须是： -
<?php
// Include Database handler
require_once 'include/DB_Functions.php';
$db = new DB_Functions();
$class_id="2";
function getClassById($class_id) {
$ss="SELECT * FROM student WHERE class_id = '$class_id'";
$result = mysql_query($ss) or die(mysql_error());
// check for result
$no_of_rows = mysql_num_rows($result);
if ($no_of_rows > 0) {
$result = mysql_fetch_array($result);
return $result;
}
else {
// user not found
return false;
}
}
$user =getClassById($class_id);
if ($user != false) {
$response["success"] = 1;
$response["user"]["class_id"] = $user["class_id"];
$response["user"]["name"] = $user["name"];
$response["user"]["enrolment"] = $user["enrolment"];
echo json_encode($response);
} else {
// user not found
// echo json with error = 1
$response["error"] = 1;
$response["error_msg"] = "Incorrect email or password!";
echo json_encode($response);
}
?>
现在你的代码可以是你想要的任何东西但它必须有json_encode（）来获取android中的json对象。 现在你的android编码必须像。
public class UserFunctions {
private JSONParser jsonParser;
private static final String TAG_RESULTS="result";
private static final String TAG_ID = "id";
private static final String TAG_YEAR = "yearof";
private static final String TAG_BRANCH ="branchof";
private static final String TAG_SECTION ="sectionof";
private static final String TAG_ClassKey ="classkey";
private static final String TAG_cordinator ="coordinatoremail";
private static String KEY_SUCCESS = "success";
private static String KEY_ERROR = "error";
//URL of the PHP API
private static String GetbunkstudentURL = "http://169.254.90.189/learn2crack_login_api/getabsentstudent/getabsentstudent.php";
private static String bunk_tag = "bunk";
private static String register_tag = "register"; // constructor
public UserFunctions(){
jsonParser = new JSONParser();
}
public JSONObject getBunkStudent(String lecture1, String lecture2) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("tag", bunk_tag));
params.add(new BasicNameValuePair("lec1", lecture1));
params.add(new BasicNameValuePair("lec2", lecture2));
JSONObject json = jsonParser.getJSONFromUrl(GetbunkstudentURL, params);
return json;
}
}
现在你的jsonparser.java类必须是： -
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url, List<NameValuePair> params) {
// Making HTTP request
try {
// 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();
} 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();
Log.e("JSON", json);
} 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;
}
}
在活动或片段中调用这些函数的代码在这里，
public class seeBunkedStudentFragment extends ListFragment {
String myJSON;
private static final String KEY_STUDENT="student";
private static final String TAG_RESULTS="result";
private static final String TAG_ID = "id";
private static final String TAG_ClassDet = "classdetails";
private static final String TAG_YEAR = "yearof";
private static final String TAG_BRANCH ="branchof";
private static String KEY_SUCCESS = "success";
private static String KEY_UID = "uid";
private static String KEY_USERNAME = "uname";
private static String KEY_FIRSTNAME = "fname";
private static String KEY_LASTNAME = "lname";
private static String KEY_EMAIL = "email";
private static String KEY_CREATED_AT = "created_at";
private static final String TAG_SECTION ="sectionof";
//////tags
private static final String TAG_TID = "tid";
private static final String Tag_Classid="classid";
private static final String Tag_Classkey="classkey";
private static final String Tag_schedid="scheduleid";
////////
JSONArray peoples = null;
JSONArray contacts = null;
ArrayList<HashMap<String, String>> contactList;
public ArrayList<HashMap<String, String>> personList;
ListView list;
private HashMap<String, String> singleclass;
String userdetail[]=new String[5];
private String todayda;
private String result;
private String ccid,ssid;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v= inflater.inflate(R.layout.bunkstudentlist,null);
list = (ListView) v.findViewById(R.id.list);
NetAsync(v);
contactList = new ArrayList<HashMap<String, String>>();
personList = new ArrayList<HashMap<String,String>>();
return v;
}
private class NetCheck extends AsyncTask<String,String,Boolean>
{
private ProgressDialog nDialog;
@Override
protected void onPreExecute(){
super.onPreExecute();
nDialog = new ProgressDialog(getActivity());
nDialog.setTitle("Checking Network");
nDialog.setMessage("Loading..");
nDialog.setIndeterminate(false);
nDialog.setCancelable(true);
nDialog.show();
}
@Override
protected Boolean doInBackground(String... args){
/**
* Gets current device state and checks for working internet connection by trying Google.
**/
/*
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
if (netInfo != null && netInfo.isConnected()) {
try {
URL url = new URL("http://www.google.com");
HttpURLConnection urlc = (HttpURLConnection) url.openConnection();
urlc.setConnectTimeout(3000);
urlc.connect();
if (urlc.getResponseCode() == 200) {
return true;
}
} catch (MalformedURLException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}*/
// return false;
return true;
}
@TargetApi(Build.VERSION_CODES.CUPCAKE)
@Override
protected void onPostExecute(Boolean th){
if(th == true){
nDialog.dismiss();
new ProcessLogin().execute();
}
else{
nDialog.dismiss();
Toast.makeText(getActivity().getApplicationContext(), "Error in Network Connection", Toast.LENGTH_LONG).show();
}
}
}
private class ProcessLogin extends AsyncTask<String, String, JSONObject> {
private ProgressDialog pDialog;
String uniq;
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(getActivity());
pDialog.setTitle("Contacting Servers");
pDialog.setMessage("Logging in ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected JSONObject doInBackground(String... args) {
String lecture1="1";
String lecture2="2";
UserFunctions userFunction = new UserFunctions();
JSONObject json = userFunction.getBunkStudent(lecture1,lecture2);
try {
if (json.getString(KEY_SUCCESS) != null) {
String res = null;
try {
res = json.getString(KEY_SUCCESS);
} catch (JSONException e1) {
e1.printStackTrace();
}
res= json.getString("success");
JSONArray json_user = json.getJSONArray("user");
int llenggt=json_user.length();
if(Integer.parseInt(res) == 1){
for (int i = 0; i < json_user.length(); i++) {
JSONObject c = json_user.getJSONObject(i);
String tid = c.getString("teacherid");
String classid= c.getString("enrollmentnumber");
String classkey= c.getString("classid");
Log.d("firstjson",tid+""+classid+""+classkey);
// tmp hashmap for single contact
HashMap<String, String> contact = new HashMap<String, String>();
//TAG_TID, Tag_Classid, Tag_Classkey // adding each child node to HashMap key => value
contact.put(TAG_TID, tid);
contact.put(Tag_Classid, classid);
contact.put(Tag_Classkey, classkey);
// adding contact to contact list
contactList.add(contact);
}
}
}
} catch (JSONException e1) {
e1.printStackTrace();
}
////
myJSON=result;
return json;
}
@Override
protected void onPostExecute(JSONObject json) {
if (pDialog.isShowing())
pDialog.dismiss();
ListAdapter adapter = new SimpleAdapter(
getActivity(), contactList,
R.layout.item_fetch_lec2, new String[]{TAG_TID, Tag_Classid,
Tag_Classkey}, new int[]{R.id.name,
R.id.email, R.id.mobile});
setListAdapter(adapter);
}
}
public void NetAsync(View view){
new NetCheck().execute();
}
//////code for othere async task
}
我认为这会有所帮助，您只需参考这些代码即可。
答案 2 :(得分：0)
在JSONObject的行之前添加此代码，
Log.i("tagconvertstr", "["+response+"]");
然后你就可以知道你的错误是什么了。
别忘了在Manifest.xml中调用AppController类