Java android httpURLConnection很奇怪
我是Android编程新手，我正在尝试从localhost数据库执行一个简单的注册登录系统。注册工作正常，但是当我试图从登录中获取响应时，我会得到一些奇怪的xml\html文本，而不仅仅是数据 这是Java代码：Java android httpURLConnection很奇怪,java,php,android,json,Java,Php,Android,Json,我是Android编程新手，我正在尝试从localhost数据库执行一个简单的注册登录系统。注册工作正常，但是当我试图从登录中获取响应时，我会得到一些奇怪的xml\html文本，而不仅仅是数据 这是Java代码： @Override protected User doInBackground(Void... params) { HashMap<String, Object> dataToSend = new HashMap<>();
@Override
protected User doInBackground(Void... params)
{
HashMap<String, Object> dataToSend = new HashMap<>();
dataToSend.put("username", user.getUsername());
dataToSend.put("password", user.getPassword());
URL server;
HttpURLConnection httpRequestParams;
User returnedUser = null;
String response = "";
try {
server = new URL(SERVER_ADDRESS + "FetchUserData.php");
httpRequestParams = (HttpURLConnection)server.openConnection();
httpRequestParams.setReadTimeout(10000);
httpRequestParams.setConnectTimeout(15000);
httpRequestParams.setRequestMethod("POST");
httpRequestParams.setDoInput(true);
httpRequestParams.setDoOutput(true);
httpRequestParams.connect();
OutputStream os = httpRequestParams.getOutputStream();
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
System.out.println(dataToSend);
System.out.println(getPostDataString(dataToSend));
writer.write(getPostDataString(dataToSend));
writer.flush();
writer.close();
os.close();
int responseCode = httpRequestParams.getResponseCode();
System.out.println(responseCode);
if (responseCode == HttpURLConnection.HTTP_OK)
{
String line;
BufferedReader br = new BufferedReader(new InputStreamReader(httpRequestParams.getInputStream()));
while ((line = br.readLine()) != null)
{
response += line;
System.out.println(response);
}
br.close();
} else
{
response = "";
throw new Exception(responseCode + "");
}
System.out.println(response);
JSONObject jObject = new JSONObject(response.toString());
if(jObject.length() == 0)
{
returnedUser = null;
}else
{
String name = jObject.getString("name");
int age = jObject.getInt("age");
returnedUser = new User(name, user.getUsername(), user.getPassword(), age);
}
} catch (MalformedURLException e1) {
e1.printStackTrace();
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
} catch (ProtocolException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
} catch (Exception e1) {
e1.printStackTrace();
}
return returnedUser;
}
我不知道怎么了。。。我不明白为什么回复是这样的。错误告诉您PHP在帖子中没有获得用户名/密码。删除
httpRequestParams.connect（）-在设置参数之前，您连接得太快。不管怎样，getResponseCode（）
都会起作用。请删除这些行
$userDetails = array($name, $username, $password, $age);
echo json_encode($userDetails);
您希望得到什么样的响应？确实如此，但它所做的只是在mysqli_stmt_fetch（$statement）之后出于某种原因缩短了响应；用户名和密码将变为null。如果我对该行进行注释，它将不会提取，但这是结果：用户选择成功。[null，username，pass，null]您能告诉我您想要的响应是什么吗？如果一切正常，这就是我假设得到的结果：用户选择成功。[名称，用户名，密码，年龄]在mysqli_stmt_fetch（$statement）之后出于某种原因；用户名和密码将变为null。如果我对该行进行注释，它将不会提取，但结果是：用户选择成功。[null，username，pass，null]–
<br /><font size='1'><table class='xdebug-error xe-notice xe-scream' dir='ltr' border='1' cellspacing='0' cellpadding='1'><tr><th align='left' bgcolor='#f57900' colspan="5"><span style='background-color: #cc0000; color: #fce94f; font-size: x-large;'>( ! )</span> SCREAM: Error suppression ignored for</th></tr><tr><th align='left' bgcolor='#f57900' colspan="5"><span style='background-color: #cc0000; color: #fce94f; font-size: x-large;'>( ! )</span> Notice: Undefined index: username in D:\Programs\WampServer\www\FetchUserData.php on line <i>9</i></th></tr><tr><th align='left' bgcolor='#e9b96e' colspan='5'>Call Stack</th></tr><tr><th align='center' bgcolor='#eeeeec'>#</th><th align='left' bgcolor='#eeeeec'>Time</th><th align='left' bgcolor='#eeeeec'>Memory</th><th align='left' bgcolor='#eeeeec'>Function</th><th align='left' bgcolor='#eeeeec'>Location</th></tr><tr><td bgcolor='#eeeeec' align='center'>1</td><td bgcolor='#eeeeec' align='center'>0.0004</td><td bgcolor='#eeeeec' align='right'>684616</td><td bgcolor='#eeeeec'>{main}( )</td><td title='D:\Programs\WampServer\www\FetchUserData.php' bgcolor='#eeeeec'>..\FetchUserData.php<b>:</b>0</td></tr></table></font><br /><font size='1'><table class='xdebug-error xe-notice xe-scream' dir='ltr' border='1' cellspacing='0' cellpadding='1'><tr><th align='left' bgcolor='#f57900' colspan="5"><span style='background-color: #cc0000; color: #fce94f; font-size: x-large;'>( ! )</span> SCREAM: Error suppression ignored for</th></tr><tr><th align='left' bgcolor='#f57900' colspan="5"><span style='background-color: #cc0000; color: #fce94f; font-size: x-large;'>( ! )</span> Notice: Undefined index: password in D:\Programs\WampServer\www\FetchUserData.php on line <i>10</i></th></tr><tr><th align='left' bgcolor='#e9b96e' colspan='5'>Call Stack</th></tr><tr><th align='center' bgcolor='#eeeeec'>#</th><th align='left' bgcolor='#eeeeec'>Time</th><th align='left' bgcolor='#eeeeec'>Memory</th><th align='left' bgcolor='#eeeeec'>Function</th><th align='left' bgcolor='#eeeeec'>Location</th></tr><tr><td bgcolor='#eeeeec' align='center'>1</td><td bgcolor='#eeeeec' align='center'>0.0004</td><td bgcolor='#eeeeec' align='right'>684616</td><td bgcolor='#eeeeec'>{main}( )</td><td title='D:\Programs\WampServer\www\FetchUserData.php' bgcolor='#eeeeec'>..\FetchUserData.php<b>:</b>0</td></tr></table></font>HEY------------<br /><font size='1'><table class='xdebug-error xe-warning xe-scream' dir='ltr' border='1' cellspacing='0' cellpadding='1'><tr><th align='left' bgcolor='#f57900' colspan="5"><span style='background-color: #cc0000; color: #fce94f; font-size: x-large;'>( ! )</span> SCREAM: Error suppression ignored for</th></tr><tr><th align='left' bgcolor='#f57900' colspan="5"><span style='background-color: #cc0000; color: #fce94f; font-size: x-large;'>( ! )</span> Warning: mysqli_stmt::bind_param() [<a href='mysqli-stmt.bind-param'>mysqli-stmt.bind-param</a>]: Number of variables doesn't match number of parameters in prepared statement in D:\Programs\WampServer\www\FetchUserData.php on line <i>16</i></th></tr><tr><th align='left' bgcolor='#e9b96e' colspan='5'>Call Stack</th></tr><tr><th align='center' bgcolor='#eeeeec'>#</th><th align='left' bgcolor='#eeeeec'>Time</th><th align='left' bgcolor='#eeeeec'>Memory</th><th align='left' bgcolor='#eeeeec'>Function</th><th align='left' bgcolor='#eeeeec'>Location</th></tr><tr><td bgcolor='#eeeeec' align='center'>1</td><td bgcolor='#eeeeec' align='center'>0.0004</td><td bgcolor='#eeeeec' align='right'>684616</td><td bgcolor='#eeeeec'>{main}( )</td><td title='D:\Programs\WampServer\www\FetchUserData.php' bgcolor='#eeeeec'>..\FetchUserData.php<b>:</b>0</td></tr><tr><td bgcolor='#eeeeec' align='center'>2</td><td bgcolor='#eeeeec' align='center'>0.0111</td><td bgcolor='#eeeeec' align='right'>703168</td><td bgcolor='#eeeeec'>mysqli_stmt->bind_param( )</td><td title='D:\Programs\WampServer\www\FetchUserData.php' bgcolor='#eeeeec'>..\FetchUserData.php<b>:</b>16</td></tr></table></font>User selected successfully.[null,null,null,null]
User selected successfully.[user,username,pass,12]
$userDetails = array($name, $username, $password, $age);
echo json_encode($userDetails);