Android：如何将Java.String转换为JSONObject
我刚刚开始使用Android Studio编写代码，但我遇到了一个无法解决的问题。 我尝试创建一个登录/注册活动，当注册工作正常时，登录给我带来了困难，出现了下一个错误：Android：如何将Java.String转换为JSONObject,java,php,android,mysql,json,Java,Php,Android,Mysql,Json,我刚刚开始使用Android Studio编写代码，但我遇到了一个无法解决的问题。 我尝试创建一个登录/注册活动，当注册工作正常时，登录给我带来了困难，出现了下一个错误： "Json error :Value<br><table of type java.lang.String cannot be converted to JSONObject" 当它将表的HTML构建而不是其内容获取到用户中时 有人知道如何解决这个问题吗？经过很长时间的研究，我的网络主机似乎不支持mysql
"Json error :Value<br><table of type java.lang.String cannot be converted to JSONObject"
有人知道如何解决这个问题吗？经过很长时间的研究，我的网络主机似乎不支持mysqlnd驱动程序，因此我将代码更改为以下内容，解决了这个问题
/**
* Get user by email and password
*/
public function getUserByEmailAndPassword($email, $password) {
$stmt = $this->conn->prepare("SELECT unique_id,name,email,created_at,updated_at, encrypted_password , salt FROM users WHERE email = ?");
$stmt->bind_param("s", $email);
if ($stmt->execute()) {
$stmt->store_result();
$num_of_rows = $stmt->num_rows;
$stmt->bind_result($aid, $aname, $aemail, $acreated_at, $aupdated_at , $aencrypted_password , $asalt);
while ($stmt->fetch()) {
$user[0] = $aid;
$user[1] = $aname;
$user[2] = $aemail;
$user[3] = $acreated_at;
$user[4] = $aupdated_at;
$user[5] = $aencrypted_password;
$user[6] = $asalt;
$user[7] = $this->checkhashSSHA($asalt, $password);
}
$stmt->free_result();
$stmt->close();
return $user;
} else {
return NULL;
}
}
它几乎每次都从SQL 1列收集数据，虽然不是动态的，但它可以工作。在
JSON
JSONObject 11-29 17:42:04.036: D/RegisterActivity(2188): Login Response: <br><table border='1' cellpadding='2' bgcolor='#FFFFDF' bordercolor='#E8B900' align='center'><tr><td><font face='Arial' size='1' color='#000000'><b>PHP Error Message</b></font></td></tr></table><br />
11-29 17:42:04.036: D/RegisterActivity(2188): <b>Fatal error</b>: Call to undefined method mysqli_stmt::get_result() in <b>/home/a4085630/public_html/include/DB_Functions.php</b> on line <b>59</b><br />
11-29 17:42:04.036: D/RegisterActivity(2188): <br><table border='1' cellpadding='2' bgcolor='#FFFFDF' bordercolor='#E8B900' align='center'><tr><td><div align='center'><a href='http://www.000webhost.com/'><font face='Arial' size='1' color='#000000'>Free Web Hosting</font></a></div></td></tr></table>
11-29 17:42:04.059: E/Surface(2188): getSlotFromBufferLocked: unknown buffer: 0xb3f967c0
11-29 17:42:04.065: W/System.err(2188): org.json.JSONException: Value <br><table of type java.lang.String cannot be converted to JSONObject
11-29 17:42:04.065: W/System.err(2188): at org.json.JSON.typeMismatch(JSON.java:111)
11-29 17:42:04.065: W/System.err(2188): at org.json.JSONObject.<init>(JSONObject.java:160)
11-29 17:42:04.065: W/System.err(2188): at org.json.JSONObject.<init>(JSONObject.java:173)
11-29 17:42:04.065: W/System.err(2188): at markitcommunity.org.markit.activity.LoginActivity$3.onResponse(LoginActivity.java:123)
11-29 17:42:04.065: W/System.err(2188): at markitcommunity.org.markit.activity.LoginActivity$3.onResponse(LoginActivity.java:114)
11-29 17:42:04.065: W/System.err(2188): at com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:60)
11-29 17:42:04.065: W/System.err(2188): at com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:30)
11-29 17:42:04.065: W/System.err(2188): at com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:99)
11-29 17:42:04.065: W/System.err(2188): at android.os.Handler.handleCallback(Handler.java:739)
11-29 17:42:04.065: W/System.err(2188): at android.os.Handler.dispatchMessage(Handler.java:95)
11-29 17:42:04.065: W/System.err(2188): at android.os.Looper.loop(Looper.java:148)
11-29 17:42:04.065: W/System.err(2188): at android.app.ActivityThread.main(ActivityThread.java:5417)
11-29 17:42:04.065: W/System.err(2188): at java.lang.reflect.Method.invoke(Native Method)
11-29 17:42:04.066: W/System.err(2188): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
11-29 17:42:04.066: W/System.err(2188): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
11-29 17:42:04.114: W/EGL_emulation(2188): eglSurfaceAttrib not implemented
11-29 17:42:04.114: W/OpenGLRenderer(2188): Failed to set EGL_SWAP_BEHAVIOR on surface 0xa2dc7a20, error=EGL_SUCCESS
<?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();
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;
}
}
?>
$user = $stmt->get_result()->fetch_assoc();
/**
* Get user by email and password
*/
public function getUserByEmailAndPassword($email, $password) {
$stmt = $this->conn->prepare("SELECT unique_id,name,email,created_at,updated_at, encrypted_password , salt FROM users WHERE email = ?");
$stmt->bind_param("s", $email);
if ($stmt->execute()) {
$stmt->store_result();
$num_of_rows = $stmt->num_rows;
$stmt->bind_result($aid, $aname, $aemail, $acreated_at, $aupdated_at , $aencrypted_password , $asalt);
while ($stmt->fetch()) {
$user[0] = $aid;
$user[1] = $aname;
$user[2] = $aemail;
$user[3] = $acreated_at;
$user[4] = $aupdated_at;
$user[5] = $aencrypted_password;
$user[6] = $asalt;
$user[7] = $this->checkhashSSHA($asalt, $password);
}
$stmt->free_result();
$stmt->close();
return $user;
} else {
return NULL;
}
}