我是编程新手...... 我尝试从android调用webservice。但那里我有致命的错误。
1.这是android编码
public class UserFunction {
private JSONParser jsonParser;
private static String LoginURL="http://10.0.2.2/android/include/index.php";
private static String RegisterURL="http://10.0.2.2/android/include/index.php";
private static String login_tag="login";
private static String register_tag="register";
public UserFunction(){
jsonParser=new JSONParser();
}
public JSONObject loginUser(String email, String password){
//building parameter
List<NameValuePair> params= new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("tag", login_tag));
params.add(new BasicNameValuePair("email", email));
params.add(new BasicNameValuePair("password", password));
JSONObject json=jsonParser.getJSONFromUrl(LoginURL, params);
return json;
}
public JSONObject registerUser(String email, String name, String password){
//building parameter
List<NameValuePair> params= new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("tag", login_tag));
params.add(new BasicNameValuePair("name", name));
params.add(new BasicNameValuePair("email", email));
params.add(new BasicNameValuePair("password", password));
//getting JSONObject
JSONObject json=jsonParser.getJSONFromUrl(RegisterURL, params);
return json;
}
public boolean isUserLoggedIn(Context context){
DatabaseHandler db= new DatabaseHandler(context);
int count=db.getRowCount();
if(count>0){
return true;
}
return false;
}
public boolean logoutUser(Context context){
DatabaseHandler db=new DatabaseHandler(context);
db.resetTable();
return false;
}
}
2.这是index.php
if(isset($_POST['tag'])&& $_POST['tag'] !=''){
//get tag
$tag=$_POST['tag'];
//include DB handler
require_once ('DB_Functions.php');//ganti include
$db=new DB_Functions();
//response array
$response=array ("tag"=> $tag, "Success"=>0, "error"=>0);
//check 4 tag type
if($tag='login'){
//req type is check login
$email=$_POST['email'];
$password=$_POST['password'];
//check 4 user
$user=$db->GetUserByEmailAndPassword($email, $password);
if($user !=false){
/* user found
* echo JSON with Success =1 */
$response ["Success"]=1;
$response["uid"]=$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 not found
* echo JSON with error =1 */
$response ["Error"]=1;
$response["error_msg"]="INCORRECT EMAIL OR PASSWORD!!!";
echo json_encode($response);
}
}
else if($tag=='register'){
//req type is register new user
$name=$_POST['name'];
$email=$_POST['email'];
$password=$_POST['password'];
//check if user already existed
if($db->IsUserExisted($email)){
//user is already existed - error response
$response["error"]=2;
$response["error_msg"]="USER IS ALREADY EXISTS";
echo json_encode($response);
}
else{
//store user
$user=$db->StoreUser($name, $email, $password);
if($user){
//user stored successfull
$response ["Success"]=1;
$response["uid"]=$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"]=1;
$response["error_msg"]="ERROR OCCURED IN REGISTRATION";
echo json_encode($response);
}
}
}
else{
echo "INVALID REQUEST";
}
}
else{
echo "ACCESS DENIED";
}
?>
第3。这是DB_Functions.php
<?php
class DB_Functions{
private $db;
/*constructor*/
function __construct($db){
require_once ('DB_Connect.php');//ganti include
/*connecting DB*/
$this->db= new DB_Connect();
$this->db->connect();
}
/*destructor*/
function __destruct($db){
}
/*
*storing new user
*returning user detail
*/
public function StoreUser($name, $email, $password){
$uuid= uniqid('',true);
$hash= $this->hashSSHA($password);
$encrypted_password= $hash["encrypted"]; //encripted password
$salt=$hash["salt"];//salt
$result=mysql_query("INSERT INTO account_users(unique_id, name, email, encrypted_password, salt, created_at) VALUES ('$uuid','$name','$email','$encrypted_password','$salt',NOW())");
/*check for succesfull store*/
if($result){
/*get user detail*/
$uid= mysql_insert_id();
$result= mysql_query("SELECT * FROM account_users WHERE uid='$uid'");
/*return user detail*/
return mysql_fetch_array($result);
}
else{
return false;
}
}
/*
*get user by email & password
*/
public function GetUserByEmailAndPassword($email, $password){
$result=mysql_query("SELECT * FROM account_users WHERE email='$email'") or die (mysql_error());
//check 4 result
$no_of_rows=mysql_num_rows($result);
if($no_of_rows>0){
$result=mysql_fetch_array($result);
$salt=$result['salt'];
$encrypted_password=$result['encrypted_password'];
$hash=$this->checkhashSSHA($salt, $password);
//check pass equality
if($encrypted_password==$hash){
//user auth are correct
return $result;
}
}
else{
//user not found
return false;
}
}
/*
*check user existed or not
*/
public function IsUserExisted($email){
$result=mysql_query("SELECT email FROM account_users WHERE email='$email'");
$no_of_rows=mysql_num_rows($result);
if($no_of_rows>0){
//user existed
return true;
}
else{
//user not existed
return false;
}
}
/*
*encrypting pass
*@param pass
*return salt & encrpted pass
*/
public function hashSHHA($password){
$salt=sha1(rand());
$salt=substr($salt, 0, 10);
$encrypted= base64_encode(sha1($password.$salt, true).$salt);
$hash=array("salt"=> $salt, "encrypted"=> $encrypted);
return $hash();
}
/*
*decrypting pass
*@param salt, pass
*return hash string
*/
public function CheckHashSSHA($salt, $password){
$hash=base64_encode(sha1($password.$salt, true).$salt);
return $hash;
}
}
?>
4。当我运行android代码
时，最后这是错误07-18 02:07:59.393: D/dalvikvm(541): GC_EXPLICIT freed 3420 objects / 314064 bytes in 340ms
07-18 02:08:08.802: E/JSON(541): <br />n<b>Fatal error</b>: Destructor DB_Functions::__destruct() cannot take arguments in <b>C:\xampp\htdocs\android\include\DB_Functions.php</b> on line <b>13</b><br />n
07-18 02:08:08.802: E/JSON PARSER(541): Error parsing dataorg.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
07-18 02:08:08.802: W/System.err(541): java.lang.NullPointerException
07-18 02:08:08.812: W/System.err(541): at com.androidTA.androidclient.RegisterActivity$1.onClick(RegisterActivity.java:58)
07-18 02:08:08.812: W/System.err(541): at android.view.View.performClick(View.java:2408)
07-18 02:08:08.812: W/System.err(541): at android.view.View$PerformClick.run(View.java:8816)
07-18 02:08:08.812: W/System.err(541): at android.os.Handler.handleCallback(Handler.java:587)
07-18 02:08:08.812: W/System.err(541): at android.os.Handler.dispatchMessage(Handler.java:92)
07-18 02:08:08.812: W/System.err(541): at android.os.Looper.loop(Looper.java:123)
07-18 02:08:08.812: W/System.err(541): at android.app.ActivityThread.main(ActivityThread.java:4627)
07-18 02:08:08.822: W/System.err(541): at java.lang.reflect.Method.invokeNative(Native Method)
07-18 02:08:08.858: W/System.err(541): at java.lang.reflect.Method.invoke(Method.java:521)
07-18 02:08:08.858: W/System.err(541): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-18 02:08:08.858: W/System.err(541): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-18 02:08:08.862: W/System.err(541): at dalvik.system.NativeStart.main(Native Method)
我有破坏功能的问题...，请任何人帮我解决这个问题...，非常感谢你的解决方案,,,：）
答案 0 :(得分：2)
从构造函数/析构函数参数中删除所有$ db参数。像这样：
function __construct(){
require_once ('DB_Connect.php');//ganti include
/*connecting DB*/
$this->db= new DB_Connect();
$this->db->connect();
}
当您通过$ this-＆gt; db引用时，参数列表中不需要$ db，因此不需要。
function __destruct(){
}
您不必传递任何其他参数，因为该对象已完全清除
答案 1 :(得分：0)
只需从析构函数中删除 $ db 参数即可。它看起来应该是这样的。
/*destructor*/
function __destruct(){
}
如果您需要从析构函数访问数据库，您始终可以使用$this->db，因为您已经在构造函数中初始化了它。
除此之外，您还应该从构造函数中删除$db参数。它没有被使用，并且在index.php中构造DB_functions对象时没有传递任何参数。