我已就此主题研究了大量材料。我跟随他们的例子都没有用。
我将数据（txtUsername和txtPassword）从Android应用程序发布到php文件。
此代码中的问题，HTTPConnection 发布空字符串到php文件。 我使用过Uri String builder，以及其他构建字符串的方法......它们都返回＆＃34; Empty Strings Parsed＆＃34;。
主要活动代码
*
package com.example.examinationportal;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.graphics.Color;
import android.net.Uri;
import android.os.AsyncTask;
import android.provider.Settings;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.app.IntentService;
import android.app.PendingIntent;
import org.apache.http.NameValuePair;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.io.InputStream;
public class MainActivity extends AppCompatActivity {
public String message = "";
SQLiteDatabase myDB = null;
public String TableName = "Users";
public String Data;
public String responseData;
public String username;
public String password;
public String data;
public String query;
TextView statusBar, titleLogin;
EditText un, pw;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Get user defined values
un = (EditText) findViewById(R.id.editTextUsername);//username field
pw = (EditText) findViewById(R.id.editTextPassword);//password field
username = un.getText().toString();//convert username and password to string and parse
password = pw.getText().toString();//them to variables
//initialize the status bar textview control
statusBar = (TextView) findViewById(R.id.textViewStatusMsg);
titleLogin = (TextView) findViewById(R.id.textViewLogin);//title text of this UI
}
//创建GetText方法
private class GetText extends AsyncTask<Void, Void, Void> {//} throws UnsupportedEncodingException {
@Override
protected Void doInBackground(Void...params){
BufferedReader reader = null;
// Send data
try {
// Defined URL where to send data
URL url = new URL("http://www.naomiedify.com/school/test/login2.php");
//URLConnection con = url.openConnection();
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestProperty("Accept-Charset", "UTF-8");
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
con.setRequestMethod("POST");
con.setReadTimeout(10000);
con.setConnectTimeout(15000);
//这是要发送到php服务器的数据 //请注意，我使用不同的方法构建字符串以发送到服务器，但字符串在发布之前会被修剪。我无法使用 NameValuePair ，因为它在Android 2.3中已弃用 例如： 方法1：
//this method returns empty strings
query = URLEncoder.encode("txtUserName" +username,"UTF-8");
query += URLEncoder.encode("&txtPassword" +password, "UTF-8");
query += URLEncoder.encode("&cmbType=Aptitude Test", "UTF-8");
方法2：
//this method also returns empty strings
Uri.Builder builder = new Uri.Builder()
.appendQueryParameter("txtUserName", username)
.appendQueryParameter("txtPassword", password)
.appendQueryParameter("cmbType", "Aptitude Test");
query = builder.build().getEncodedQuery();
//发送POST数据请求
con.setDoOutput(true);
OutputStreamWriter wr = new OutputStreamWriter(con.getOutputStream());
wr.write( query );
wr.flush();
wr.close();
//获取服务器响应
reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
StringBuilder sb = new StringBuilder();
String line;
//读取服务器响应
while((line = reader.readLine()) != null) {
//在字符串
中附加服务器响应 sb.append(line + "\n");
Log.d("Response: ", "> " + line);
}
reader.close();
responseData = sb.toString();
}
catch (MalformedURLException e) {
e.printStackTrace();
responseData = e.toString();
}
catch (IOException e) {
e.printStackTrace();
responseData = e.toString();
}
return null;
}
//启动onPostExecute事件
@Override
protected void onPostExecute(Void result){
statusBar.setText(responseData);
super.onPostExecute(result);
}
}
// onClick事件的登录代码
public void loginUser(View login) {// Called when the user taps the login button
Intent intent = new Intent(this, DisplayWelcomeScreen.class);//start the ui
//从php服务器获取响应
new GetText().execute();
try{
//check the login using the post back data
if (responseData.equals("User Found.")) {
message = "Welcome"; //message for successful login
// Show respsonse on activity
statusBar.setText( responseData );
Bundle bundle = new Bundle();//bundle the message and parse it to the next activity
bundle.putString("dispMsg", message);//bundle the message using the variable dispMsg
intent.putExtras(bundle);
startActivity(intent);
} else {
message = "Incorrect Username or Password. Try again!";
statusBar.setTextColor(Color.parseColor("#ff0000"));
statusBar.setBackgroundColor(Color.parseColor("#d3d3d3"));
// Show response on activity
statusBar.setText( responseData + ": Incorrect Username or Password.");
}
}
catch(Exception ex) {
statusBar.setText("URL Exeption! "+ex);
}
}
}
PHP代码[login2.php]
<?php
$dataComingFrom = substr($_SERVER['HTTP_USER_AGENT'], 0, 7);
//echo $dataComingFrom;
$con = mysqli_connect($hostname_school,$username_school,"$password_school");//connect to server
mysqli_select_db($con,$_db);
if (mysqli_connect_errno()){//if error connecting to server, return error message
die("Failed to connect to MySQL: " . mysqli_connect_error());
}else if(!mysqli_select_db($con,$_db)) {//if no error connecting to server, try to select db to see whether it already exists.
if ($perform = mysqli_query($con,"CREATE DATABASE IF NOT EXISTS $_db")){ //if no db exists on the server, create the db.
$msg = "Database $_db has been created successfully";
//echo $msg;
}else { echo mysqli_errno($con) .": Error creating database: " . mysqli_error($con);}//if it can't create db, return error message
}else{ //if db was selected, it means the db already exists
//$data = "You have already created this database!";//return message that db already exists
//die("$data <br>");//kill the script
//you can perform the login process here
//$ip = preg_replace( '#[^0-9.]#', '', getenv( 'REMOTE_ADDR' ) );
$username = stripslashes( str_replace( "[^A-Z a-z0-9]", "", $_POST[ 'txtUserName' ] ) );
$plainPass = stripslashes( str_replace( "[^A-Z a-z0-9]", "", $_POST[ 'txtPassword' ] ) );
$password = strrev(md5($plainPass));
//run the query to search for the username and password for a match
//$query = "SELECT * FROM $tbl_name WHERE first_name = '$un' AND password = '$pw'";
if(empty($username) or empty($plainPass)){die("Empty Strings Parsed.");}
$user = mysqli_query($con,"SELECT * FROM ap_student WHERE AS_Email ='".$username."' AND AS_Password ='".$password."' AND
AS_Status ='Confirmed!'") or die("Unable to verify user due to: " . mysqli_error($con));
//$insert = mysqli_query($con,"UPDATE ap_student SET AS_Password = '".$password."' WHERE AS_Id = 1") or die(mysqli_error($con));
$result = mysqli_num_rows($user);
if ($result > 0){$returnedString = "User Found.";}else {$returnedString = "User Not Found";echo $returnedString;}
}
?>
** ANDROIDMANIFEST.XML **
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.examinationportal">
<uses-permission
android:name="android.permission.INTERNET">
</uses-permission>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.AppCompat.DayNight.DarkActionBar">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
* 请帮帮我...我不知道我哪里出错了。 提示：我是Android编程的新手。
谢谢。
这是最新的代码....尽管如此，PHP仍然会返回＆＃34;空字符串解析＆＃34;。
package com.example.examinationportal;
import statements here...
public class MainActivity extends AppCompatActivity {
public String message = "";
SQLiteDatabase myDB = null;
public String TableName = "Users";
public String Data = "";
public String responseData = "";
public String username = "";
public String password = "";
public String data = "";
TextView statusBar, titleLogin;
EditText un, pw;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Get user defined values
un = (EditText) findViewById(R.id.editTextUsername);//username field
pw = (EditText) findViewById(R.id.editTextPassword);//password field
username = un.getText().toString();//convert username and password to string and parse
password = pw.getText().toString();//them to variables
//initialize the status bar textview control
statusBar = (TextView) findViewById(R.id.textViewStatusMsg);
titleLogin = (TextView) findViewById(R.id.textViewLogin);//title text of this UI
}
public void loginUser(View login) {// Called when the user taps the login button
Intent intent = new Intent(this, DisplayWelcomeScreen.class);//start the ui
new GetText().execute();
try{
//check the login using the post back data
if (responseData.equals("User Found.")) {
message = "Welcome"; //message for successful login
// Show respsonse on activity
statusBar.setText( responseData );
Bundle bundle = new Bundle();//bundle the message and parse it to the next activity
bundle.putString("dispMsg", message);//bundle the message using the variable dispMsg
intent.putExtras(bundle);
startActivity(intent);
} else {
message = "Incorrect Username or Password. Try again!";
statusBar.setTextColor(Color.parseColor("#ff0000"));
statusBar.setBackgroundColor(Color.parseColor("#d3d3d3"));
// Show response on activity
statusBar.setText( responseData + ": Incorrect Username or Password.");
}
}
catch(Exception ex) {
statusBar.setText("URL Exeption! "+ex);
}
}
// Create GetText Method
public class GetText extends AsyncTask<Void, Void, Void> {//} throws UnsupportedEncodingException {
@Override
protected Void doInBackground(Void...params){
BufferedReader reader = null;
// Send data
try {
// Defined URL where to send data
URL url = new URL("http://www.naomiedify.com/school/test/login2.php");
//URLConnection con = url.openConnection();
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestProperty("Accept-Charset", "UTF-8");
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
con.setRequestMethod("POST");
con.setReadTimeout(10000);
con.setConnectTimeout(15000);
/* data = URLEncoder.encode("txtUserName", "UTF-8") +"=" +URLEncoder.encode(username,"UTF-8")
+"&" +URLEncoder.encode("txtPassword", "UTF-8") +"=" +URLEncoder.encode(password, "UTF-8")
+"&" +URLEncoder.encode("cmbType", "UTF-8") +"=" +URLEncoder.encode("Aptitude Test", "UTF-8");*/
Uri.Builder builder = new Uri.Builder()
.appendQueryParameter("txtUserName", username)
.appendQueryParameter("txtPassword", password)
.appendQueryParameter("cmbType", "Aptitude Test");
String query = builder.build().getEncodedQuery();
// Send POST data request
con.setDoOutput(true);
OutputStream os = con.getOutputStream();
//OutputStreamWriter wr = new OutputStreamWriter(con.getOutputStream());
BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
wr.write( query );
wr.flush();
wr.close();
os.close();
//con.connect();
// Get the server response
reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
StringBuilder sb = new StringBuilder();
String line;
// Read Server Response
while((line = reader.readLine()) != null) {
// Append server response in string
sb.append(line + "\n");
Log.d("Response: ", "> " + line);
}
reader.close();
responseData = sb.toString();
}
catch (MalformedURLException e) {
e.printStackTrace();
responseData = e.toString();
// new URL() failed
}
catch (IOException e) {
e.printStackTrace();
responseData = e.toString();
// openConnection() failed
}
return null;
}
@Override
protected void onPostExecute(Void result){
statusBar.setText(responseData);
super.onPostExecute(result);
}
}
}
我已经重新编辑了整个代码......下面...... 结果仍然是＃34;空字符串＆＃34;发布到PHP。
package com.example.examinationportal;
import statements here...
public class MainActivity extends AppCompatActivity {
public String message = "";
SQLiteDatabase myDB = null;
public String TableName = "Users";
public String Data = "";
public String responseData = "";
public String username = "";
public String password = "";
public String data = "";
TextView statusBar, titleLogin;
EditText un, pw;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Get user defined values
un = (EditText) findViewById(R.id.editTextUsername);//username field
pw = (EditText) findViewById(R.id.editTextPassword);//password field
username = un.getText().toString();//convert username and password to string and parse
password = pw.getText().toString();//them to variables
//initialize the status bar textview control
statusBar = (TextView) findViewById(R.id.textViewStatusMsg);
titleLogin = (TextView) findViewById(R.id.textViewLogin);//title text of this UI
}
// Create GetText Method
public class GetText extends AsyncTask<Void, Void, Void> {//} throws UnsupportedEncodingException {
@Override
protected Void doInBackground(Void...params){
BufferedReader reader = null;
// Send data
try {
// Defined URL where to send data
URL url = new URL("http://www.naomiedify.com/school/test/login2.php");
//URLConnection con = url.openConnection();
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestProperty("Accept-Charset", "UTF-8");
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
con.setRequestMethod("POST");
con.setReadTimeout(10000);
con.setConnectTimeout(15000);
/* data = URLEncoder.encode("txtUserName", "UTF-8") +"=" +URLEncoder.encode(username,"UTF-8")
+"&" +URLEncoder.encode("txtPassword", "UTF-8") +"=" +URLEncoder.encode(password, "UTF-8")
+"&" +URLEncoder.encode("cmbType", "UTF-8") +"=" +URLEncoder.encode("Aptitude Test", "UTF-8");*/
Uri.Builder builder = new Uri.Builder()
.appendQueryParameter("txtUserName", username)
.appendQueryParameter("txtPassword", password)
.appendQueryParameter("cmbType", "Aptitude Test");
String query = builder.build().getEncodedQuery();
// Send POST data request
con.setDoOutput(true);
OutputStream os = con.getOutputStream();
//OutputStreamWriter wr = new OutputStreamWriter(con.getOutputStream());
BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
wr.write( query );
wr.flush();
wr.close();
os.close();
//con.connect();
// Get the server response
reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
StringBuilder sb = new StringBuilder();
String line;
// Read Server Response
while((line = reader.readLine()) != null) {
// Append server response in string
sb.append(line + "\n");
Log.d("Response: ", "> " + line);
}
reader.close();
responseData = sb.toString();
}
/* catch (MalformedURLException e) {
e.printStackTrace();
responseData = e.toString();
// new URL() failed
}*/
catch (IOException e) {
e.printStackTrace();
responseData = e.toString();
// openConnection() failed
}
return null;
}
@Override
protected void onPostExecute(Void result){
statusBar.setText(responseData);
super.onPostExecute(result);
try{
//check the login using the post back data
if (responseData.equals("User Found.")) {
message = "Welcome"; //message for successful login
// Show respsonse on activity
statusBar.setText( message );
} else {
message = "Incorrect Username or Password. Try again!";
statusBar.setTextColor(Color.parseColor("#ff0000"));
statusBar.setBackgroundColor(Color.parseColor("#d3d3d3"));
// Show response on activity
statusBar.setText("Incorrect Username or Password.");
}
}
catch(Exception ex) {
statusBar.setText("URL Exeption! "+ex);
}
}
}
public void loginUser(View login) {// Called when the user taps the login button
new GetText().execute();
/*Intent intent = new Intent(this, DisplayWelcomeScreen.class);//start the ui
Bundle bundle = new Bundle();//bundle the message and parse it to the next activity
bundle.putString("dispMsg", message);//bundle the message using the variable dispMsg
intent.putExtras(bundle);
startActivity(intent);*/
}
}
亲爱的朋友， 正如你们所建议的，我已经解决了我的应用程序代码... 该应用程序能够将数据发布到php服务器并接收数据。
但是我无法评估数据以便StartActivity（intent）。 请在下面输入以下代码......
import statemen;
public class MainActivity extends AppCompatActivity {
public String message = "";
public String Data = "";
public String responseData = "";
public String username = "";
public String password = "";
public String data = "";
Intent intent;
TextView statusBar, titleLogin;
EditText un, pw;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//initialize the status bar textview control
statusBar = (TextView) findViewById(R.id.textViewStatusMsg);
titleLogin = (TextView) findViewById(R.id.textViewLogin);//title text of this UI
}
public void newUser(View register) {
Intent i = new Intent(this, RegisterUserActivity.class);//start the ui for new user
startActivity(i);
}
public void loginUser(View login) {// Called when the user taps the login button
intent = new Intent(this, DisplayWelcomeScreen.class);//start the ui
// Get user defined values
un = (EditText) findViewById(R.id.editTextUsername);//username field
pw = (EditText) findViewById(R.id.editTextPassword);//password field
username = un.getText().toString();//convert username and password to string and parse
password = pw.getText().toString();//them to variables
new GetText().execute();
}
// Create GetText Method
public class GetText extends AsyncTask<Void, Void, Void> {//} throws UnsupportedEncodingException {
@Override
protected Void doInBackground(Void...params){
BufferedReader reader = null;
// Send data
try {
// Defined URL where to send data
URL url = new URL("http://www.naomiedify.com/school/test/login2.php");
//URLConnection con = url.openConnection();
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestProperty("Accept-Charset", "UTF-8");
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
con.setRequestMethod("POST");
con.setReadTimeout(10000);
con.setConnectTimeout(15000);
Uri.Builder builder = new Uri.Builder()
.appendQueryParameter("txtUserName", username)
.appendQueryParameter("txtPassword", password)
.appendQueryParameter("cmbType", "Aptitude Test");
String query = builder.build().getEncodedQuery();
// Send POST data request
con.setDoOutput(true);
OutputStream os = con.getOutputStream();
//OutputStreamWriter wr = new OutputStreamWriter(con.getOutputStream());
BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
wr.write( query );
wr.flush();
wr.close();
os.close();
// Get the server response
reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
StringBuilder sb = new StringBuilder();
String line;
// Read Server Response
while((line = reader.readLine()) != null) {
// Append server response in string
sb.append(line + "\n");
//Log.d("", "" + line);
}
reader.close();
responseData = sb.toString();
Log.d("Server Data", ":"+responseData);
Data = responseData;
}
catch (IOException e) {
e.printStackTrace();
responseData = e.toString();
}
return null;
}
@Override
protected void onPostExecute(Void result){
super.onPostExecute(result);
//此时，Data计算为not null
statusBar.setText(Data);
//检查从发布的返回数据返回的Data变量，然后将用户登录到下一个活动。
if (Data.equals("User Found.")) {
///但此时，Data为null，而else {}块将被评估。
message = "Welcome";
statusBar.setText( message );
Bundle bundle = new Bundle();
bundle.putString("dispMsg", message);
intent.putExtras(bundle);
startActivity(intent);
} else {
message = "Incorrect Username or Password. Try again!";
statusBar.setText(message);
}
}
}
}
答案 0 :(得分：0)
new GetText().execute();
将该语句之后的所有代码放在onPostExecute中。现在，您在异步任务开始发布之前执行该代码。
username = un.getText().toString();//convert username and password to string and parse
password = pw.getText().toString();//them to variables
onCreate（）太早了。将这些行移到loginUser（）。
答案 1 :(得分：0)
我非常感谢您的贡献和您的痛苦支持。 我找到了解决问题的方法。
以下是文档的完整代码。
package com.example.examinationportal;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.graphics.Color;
import android.net.Uri;
import android.os.AsyncTask;
import android.provider.Settings;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.app.IntentService;
import android.app.PendingIntent;
import org.apache.http.NameValuePair;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.io.InputStream;
public class MainActivity extends AppCompatActivity {
public String message = "";
public String Data = "";
public String responseData = "";
public String username = "";
public String password = "";
public String data = "";
public Intent intent;
public StringBuilder sb;
public String line;
TextView statusBar, titleLogin;
EditText un, pw;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//initialize the status bar textview control
statusBar = (TextView) findViewById(R.id.textViewStatusMsg);
titleLogin = (TextView) findViewById(R.id.textViewLogin);//title text of this UI
}
public void newUser(View register) {
Intent i = new Intent(this, RegisterUserActivity.class);//start the ui for new user
startActivity(i);
}
public void loginUser(View login) {// Called when the user taps the login button
intent = new Intent(this, DisplayWelcomeScreen.class);//start the ui
// Get user defined values
un = (EditText) findViewById(R.id.editTextUsername);//username field
pw = (EditText) findViewById(R.id.editTextPassword);//password field
username = un.getText().toString();//convert username and password to string and parse
password = pw.getText().toString();//them to variables
new GetText().execute();
}
// Create GetText Method
public class GetText extends AsyncTask<Void, Void, Void> {//} throws UnsupportedEncodingException {
@Override
protected Void doInBackground(Void...params){
BufferedReader reader = null;
// Send data
try {
// Defined URL where to send data
URL url = new URL("http://www.naomiedify.com/school/test/login2.php");
//URLConnection con = url.openConnection();
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestProperty("Accept-Charset", "UTF-8");
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
con.setRequestMethod("POST");
con.setReadTimeout(10000);
con.setConnectTimeout(15000);
Uri.Builder builder = new Uri.Builder()
.appendQueryParameter("txtUserName", username)
.appendQueryParameter("txtPassword", password)
.appendQueryParameter("cmbType", "Aptitude Test");
String query = builder.build().getEncodedQuery();
// Send POST data request
con.setDoOutput(true);
OutputStream os = con.getOutputStream();
//OutputStreamWriter wr = new OutputStreamWriter(con.getOutputStream());
BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
wr.write(query);
wr.flush();
wr.close();
os.close();
// Get the server response
reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
sb = new StringBuilder();
// Read Server Response
while ((line = reader.readLine()) != null) {
// Append server response in string
sb.append(line);
//sb.append(line + "\n"); //this line causes error also...
Log.d("Returned Line", "is " + line);
}
reader.close();
responseData = sb.toString();
Log.d("Returned Data", "sb " + sb);
}catch (IOException e) {
//e.printStackTrace();
//responseData = e.toString();
}
return null;
}
@Override
protected void onPostExecute(Void result){
if (responseData.equals( "User Found." )) {
message = "Welcome";
Bundle bundle = new Bundle();//bundle the message and parse it to the next activity
bundle.putString("dispMsg", message);//bundle the message using the variable dispMsg
intent.putExtras(bundle);
startActivity(intent);
statusBar.setText(message);
} else {
message = "Incorrect Username or Password. Try again!";
statusBar.setText(message);
}
super.onPostExecute(result);
}
}
}
谢谢大家！