This question already has answers here:
Android Cannot access org.apache.http.client.HttpClient
(2 answers)
Closed 7 years ago.
I am trying to check log in credentials , But I am getting these errors again and again , I have tried everything. I am new to android
Any kind of help will be appreciated. If there is other good way to implement same , want to know how to imply
Error
Error:(19, 30) error: package org.apache.http.client does not exist
Error:(15, 23) error: package org.apache.http does not exist
Error:(16, 23) error: package org.apache.http does not exist
Error:(17, 23) error: package org.apache.http does not exist
Error:(18, 30) error: package org.apache.http.client does not exist
Error:(20, 37) error: package org.apache.http.client.entity does not exist
Error:(21, 38) error: package org.apache.http.client.methods does not exist
Error:(22, 35) error: package org.apache.http.impl.client does not exist
Error:(23, 31) error: package org.apache.http.message does not exist
Error:(79, 22) error: cannot find symbol class NameValuePair
Error:(85, 49) error: cannot find symbol class DefaultHttpClient
Error:(86, 21) error: cannot find symbol class HttpPost
Error:(86, 45) error: cannot find symbol class HttpPost
Error:(88, 44) error: cannot find symbol class UrlEncodedFormEntity
Error:(90, 21) error: cannot find symbol class HttpResponse
Error:(92, 21) error: cannot find symbol class HttpEntity
Error:(105, 26) error: cannot find symbol class ClientProtocolException
Error:Execution failed for task ':app:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.
Error:(85, 21) error: cannot find symbol class HttpClient
Error:(81, 40) error: cannot find symbol class BasicNameValuePair
Error:(80, 40) error: cannot find symbol class BasicNameValuePair
Error:(79, 68) error: cannot find symbol class NameValuePair
MainActivity.java
package com.tarun.proxy_maar;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private EditText editTextUserName;
private EditText editTextPassword;
public static final String USER_NAME = "USERNAME";
String username;
String password;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editTextUserName = (EditText) findViewById(R.id.editTextUserName);
editTextPassword = (EditText) findViewById(R.id.editTextPassword);
}
public void invokeLogin(View view){
username = editTextUserName.getText().toString();
password = editTextPassword.getText().toString();
login(username,password);
}
private void login(final String username, String password) {
class LoginAsync extends AsyncTask<String, Void, String>{
private Dialog loadingDialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
loadingDialog = ProgressDialog.show(MainActivity.this, "Please wait", "Loading...");
}
#Override
protected String doInBackground(String... params) {
String uname = params[0];
String pass = params[1];
InputStream is = null;
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("username", uname));
nameValuePairs.add(new BasicNameValuePair("password", pass));
String result = null;
try{
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(
"http://shaadi.web44.net/hello.php");
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpClient.execute(httpPost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
result = sb.toString();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
#Override
protected void onPostExecute(String result){
String s = result.trim();
loadingDialog.dismiss();
if(s.equalsIgnoreCase("success")){
Intent intent = new Intent(MainActivity.this, UserProfile.class);
intent.putExtra(USER_NAME, username);
finish();
startActivity(intent);
}else {
Toast.makeText(getApplicationContext(), "Invalid User Name or Password", Toast.LENGTH_LONG).show();
}
}
}
LoginAsync la = new LoginAsync();
la.execute(username, password);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
Add that to your build.gradle:
android {
useLibrary 'org.apache.http.legacy'
}
Or you use the HttpURLConnection class instead.
The DefaultHttpClient and NameValuePair classes were deprecated in API level 22, and removed in API level 23.
Google even took down the documentation for them.
When the documentation was still up, it recommended to switch to HttpUrlConnection for basic tasks such as this.
Here's a modified version of your AsyncTask that will work on API level 23:
class LoginAsync extends AsyncTask<String, Void, String>{
private Dialog loadingDialog;
String url = "http://shaadi.web44.net/hello.php";
String charset = "UTF-8";
HttpURLConnection conn;
DataOutputStream wr;
StringBuilder result = new StringBuilder();
URL urlObj;
JSONObject jObj = null;
StringBuilder sbParams;
String paramsString;
#Override
protected void onPreExecute() {
super.onPreExecute();
loadingDialog = ProgressDialog.show(MainActivity.this, "Please wait", "Loading...");
}
#Override
protected String doInBackground(String... params) {
String uname = params[0];
String pass = params[1];
sbParams = new StringBuilder();
try {
sbParams.append("name").append("=")
.append(URLEncoder.encode(uname, charset));
sbParams.append("&");
sbParams.append("password").append("=")
.append(URLEncoder.encode(pass, charset));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
try {
urlObj = new URL(url);
conn = (HttpURLConnection) urlObj.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Accept-Charset", charset);
conn.setReadTimeout(10000);
conn.setConnectTimeout(15000);
conn.connect();
paramsString = sbParams.toString();
wr = new DataOutputStream(conn.getOutputStream());
wr.writeBytes(paramsString);
wr.flush();
wr.close();
} catch (IOException e) {
e.printStackTrace();
}
try {
//response from the server
InputStream in = new BufferedInputStream(conn.getInputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
} catch (IOException e) {
e.printStackTrace();
}
conn.disconnect();
return result.toString();
}
#Override
protected void onPostExecute(String result){
String s = result.trim();
loadingDialog.dismiss();
if(s.equalsIgnoreCase("success")){
Intent intent = new Intent(MainActivity.this, UserProfile.class);
intent.putExtra(USER_NAME, username);
finish();
startActivity(intent);
}else {
Toast.makeText(getApplicationContext(), "Invalid User Name or Password", Toast.LENGTH_LONG).show();
}
}
}
Full class code:
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
import org.json.JSONObject;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
public class MainActivity extends AppCompatActivity {
private EditText editTextUserName;
private EditText editTextPassword;
public static final String USER_NAME = "USERNAME";
String username;
String password;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editTextUserName = (EditText) findViewById(R.id.editTextUserName);
editTextPassword = (EditText) findViewById(R.id.editTextPassword);
}
public void invokeLogin(View view){
username = editTextUserName.getText().toString();
password = editTextPassword.getText().toString();
login(username,password);
}
private void login(final String username, String password) {
class LoginAsync extends AsyncTask<String, Void, String>{
private Dialog loadingDialog;
String url = "http://shaadi.web44.net/hello.php";
String charset = "UTF-8";
HttpURLConnection conn;
DataOutputStream wr;
StringBuilder result = new StringBuilder();
URL urlObj;
JSONObject jObj = null;
StringBuilder sbParams;
String paramsString;
#Override
protected void onPreExecute() {
super.onPreExecute();
loadingDialog = ProgressDialog.show(MainActivity.this, "Please wait", "Loading...");
}
#Override
protected String doInBackground(String... params) {
String uname = params[0];
String pass = params[1];
sbParams = new StringBuilder();
try {
sbParams.append("name").append("=")
.append(URLEncoder.encode(uname, charset));
sbParams.append("&");
sbParams.append("password").append("=")
.append(URLEncoder.encode(pass, charset));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
try {
urlObj = new URL(url);
conn = (HttpURLConnection) urlObj.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Accept-Charset", charset);
conn.setReadTimeout(10000);
conn.setConnectTimeout(15000);
conn.connect();
paramsString = sbParams.toString();
wr = new DataOutputStream(conn.getOutputStream());
wr.writeBytes(paramsString);
wr.flush();
wr.close();
} catch (IOException e) {
e.printStackTrace();
}
try {
//response from the server
InputStream in = new BufferedInputStream(conn.getInputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
} catch (IOException e) {
e.printStackTrace();
}
conn.disconnect();
return result.toString();
}
#Override
protected void onPostExecute(String result){
String s = result.trim();
loadingDialog.dismiss();
if(s.equalsIgnoreCase("success")){
Intent intent = new Intent(MainActivity.this, UserProfile.class);
intent.putExtra(USER_NAME, username);
finish();
startActivity(intent);
}else {
Toast.makeText(getApplicationContext(), "Invalid User Name or Password", Toast.LENGTH_LONG).show();
}
}
}
LoginAsync la = new LoginAsync();
la.execute(username, password);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
Related
im trying to connect my android app with the data base im using for the website but somehow it doesnt want to connect
this is my java code im using for the connect
Android manifest i added
<uses-permission android:name="android.permission.INTERNET"></uses-
permission>
background.java
package com.example.myapplication;
import android.app.AlertDialog;
import android.content.Context;
import android.os.AsyncTask;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
public class backgroundworker extends AsyncTask<String,Void, String> {
Context context;
AlertDialog alertDialog;
backgroundworker(Context ctx){
context =ctx;
}
#Override
protected String doInBackground(String... params) {
String type = params[0];
String login_url = "http://10.0.2.2//android/login.php";
if (type.equals("login")){
try {
String Email = params[1];
String Password = params[2];
URL url = new URL(login_url);
HttpURLConnection httpURLConnection =
(HttpURLConnection)url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
OutputStream outputStream = httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new
OutputStreamWriter(outputStream, "UTF-8"));
String post_data = URLEncoder.encode("Email","UTF-
8")+"="+URLEncoder.encode(Email,"UTF-8")+"&"
+ URLEncoder.encode("Password","UTF-
8")+"="+URLEncoder.encode(Password,"UTF-8");
bufferedWriter.write(post_data);
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new
InputStreamReader(inputStream,"iso-8859-1"));
String result="";
String line="";
while((line = bufferedReader.readLine())!=null){
result += line;
}
bufferedReader.close();
inputStream.close();
httpURLConnection.disconnect();
return result;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
#Override
protected void onPreExecute() {
alertDialog = new AlertDialog.Builder(context).create();
alertDialog.setTitle("Login Status");
}
#Override
protected void onPostExecute(String result) {
alertDialog.setMessage(result);
alertDialog.show();
}
#Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
}
login.java
package com.example.myapplication;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class login extends AppCompatActivity implements View.OnClickListener
{
Button liButton;
EditText liEmail, liPassword;
TextView liSignup;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
liEmail = (EditText) findViewById(R.id.liEmail);
liPassword = (EditText) findViewById(R.id.liPassword);
liButton =(Button) findViewById(R.id.liButton);
liSignup= (TextView) findViewById(R.id.liSignup);
liButton.setOnClickListener(this);
liSignup.setOnClickListener(this);
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.liButton:
String Email = liEmail.getText().toString();
String Password = liPassword.getText().toString();
String type = "login";
BackgroundWorker backgroundworker = new BackgroundWorker(this);
backgroundworker.execute(type, Email, Password);
break;
case R.id.liSignup:
startActivity(new Intent(this, signup.class));
break;
}
}
}
this is my php code
<?php
$conn = mysqli_connect('127.0.0.1','root','','signup');
?>
<?php
include('conn.php');
if(!session_id())
session_start();
if (isset($_POST['Email'])
and isset($_POST['Password'])
and !empty($_POST['Email'])
and !empty($_POST['Password'])){
$Email = $_POST['Email'];
$Password= $_POST['Password'];
$getinfo = "SELECT * FROM users WHERE Email ='$Email' LIMIT 1";
$res = mysqli_query($conn,$getinfo);
$row = mysqli_fetch_assoc($res);
if (mysqli_num_rows($res)>0) {
$dbPassword = $row['Password'];
$Password = PASSWORD_VERIFY($Password, $dbPassword);
if ($Email == $row ['Email'] and $Password == $dbPassword) {
$id = $row['id'];
$_SESSION['id'] = $id;
exit();
} else{
echo 'Wrong Email or Password.';
}
} else{
echo 'Wrong Email or Password.';
}
}
?>
i believe my java code is right but im not sure what to do with my php if there is something wrong
this line
if ($Email == $row ['Email'] and $Password == $dbPassword) {
is wrong/the problem. You already password_verified, which returns a boolan, so it should be.
if ($Email == $row ['Email'] and $Password) {
And you don't need to re-check if $Email == $row ['Email'], because you queried for it already.
So you can reduce your code to:
if (mysqli_num_rows($res)>0) {
$dbPassword = $row['Password'];
if (PASSWORD_VERIFY($Password, $dbPassword)) {
$id = $row['id'];
$_SESSION['id'] = $id;
exit();
} else {
//...
i am just a beginner in developing android applications, i wanted to connect my application to a server so i could get data from MySQL. so i tried to make login part first but i have some problems. my code doesn't work for reading JSON.
my codes are as below:
LoginActivity(MainActivity) :
package ir.naserpour.sportclub;
import android.content.Context;
import android.graphics.Typeface;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.UnsupportedEncodingException;
import uk.co.chrisjenx.calligraphy.CalligraphyContextWrapper;
public class LoginActivity extends AppCompatActivity {
String link;
String response;
//get values
String username,password;
#Override
protected void attachBaseContext (Context newBase){
super.attachBaseContext(CalligraphyContextWrapper.wrap(newBase));
}
#Override
protected void onCreate (Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
//define things
TextView menu = (TextView) findViewById(R.id.menu);
final EditText login_username = (EditText) findViewById(R.id.login_username);
final EditText login_password = (EditText) findViewById(R.id.login_password);
Button login_login = (Button) findViewById(R.id.login_login);
Button login_register = (Button)findViewById(R.id.login_register);
CheckBox rememberme = (CheckBox)findViewById(R.id.login_remeberme);
//set icon type face
Typeface fonticon = Typeface.createFromAsset(getAssets(), "fonts/icon.ttf");
menu.setTypeface(fonticon);
login_login.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
username = login_username.getText().toString();
password = login_password.getText().toString();
//check values
if (username.length() <1 || password.length() < 1) {
Toast.makeText(getApplicationContext(), "fields cannot be empty", Toast.LENGTH_SHORT).show();
} else {
//generate link
link = "http://localhost:8080/login.php?username="+username+"&password="+password;
login();
if(response=="true"){
Toast.makeText(getApplicationContext(), "true", Toast.LENGTH_SHORT).show();
}else if(response=="false"){
Toast.makeText(getApplicationContext(), "false", Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(getApplicationContext(), "response", Toast.LENGTH_SHORT).show();
}
}
}
});
}
#Override
protected void onPause () {
super.onPause();
finish();
}
public String login() {
new JSONParse().execute();
return response;
}
public class JSONParse extends AsyncTask<String, String, JSONObject> {
#Override
public void onPreExecute() {
super.onPreExecute();
Toast.makeText(getApplicationContext(),"getting data ...",Toast.LENGTH_SHORT).show();
}
#Override
public JSONObject doInBackground(String... args) {
JSONParser jParser = new JSONParser();
// Getting JSON from URL
JSONObject json = jParser.getJSONFromUrl(link);
return json;
}
#Override
public void onPostExecute(JSONObject json) {
try {
JSONArray result = json.getJSONArray("result");
JSONObject c = result.getJSONObject(0);
try {
String res = new String(c.getString("response").getBytes("ISO-8859-1"), "UTF-8");
response = res;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
JSONParser.java:
package ir.naserpour.sportclub;
import android.util.Log;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
/**
* Created by Mohammad Naserpour on 9/22/2016.
*/
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
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();
} 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;
}
}
and also my login.php script:
<?php
define("HOST","localhost");
define("USERNAME","root");
define("PASSWORD","");
define("NAME","users");
$con = mysqli_connect(HOST,USERNAME,PASSWORD,NAME);
$username = $_GET["username"];
$password = $_GET["password"];
$sql = "SELECT * FROM userinfo WHERE username ='$username' AND password='$password'";
$check = mysqli_fetch_array(mysqli_query($con,$sql));
if(isset($check)){
echo '{"result":[{"response":"true"}]}';
}else{
echo '{"result":[{"response":"false"}]}';
}
mysqli_close($con);
?>
i would be so happy if i find out the problem. thank you.
see this tutorial :
its a full tutorial about login process using google volley
First : On device side, Use volley, its simple and easy to use
Second : On server, what is {"result":[{"response":"true"}]}
any problem with {"result":true} ??
Last but not the least : Did you use JSON before or this code is trial and error copy paste from some tutorials?
i have to create simple login page where after entering username and password we click to submit button. when we click on submit button then it goes to server and check the username and other information if the info matches then it moves to next activity otherwise nothing will happen . below is my code . i dont know how to do after getting response from the server.
package com.example.dev_1.myapplication;
import android.app.DownloadManager;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import android.net.Uri
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.lang.ref.ReferenceQueue;
import java.net.HttpURLConnection;
import java.net.JarURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.sql.Connection;
public class MainActivity extends AppCompatActivity {
Button button;
String connectionString, params;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final EditText username = (EditText) findViewById(R.id.editText);
final EditText password = (EditText) findViewById(R.id.editText2);
Button button = (Button) findViewById(R.id.button1);
button.setOnClickListener((new View.OnClickListener() {
#Override
public void onClick(View v) {
if (v.getId() == R.id.button1) {
String userNameString = username.getText().toString();
String passwordString = password.getText().toString();
String url = "http://122.160.78.189:82/androidserver/LoginSalesPerson";
String params = null;
try {
params = "user=" + URLEncoder.encode(userNameString, "UTF-8") + "&password=" + URLEncoder.encode(passwordString, "UTF-8") + "&appVersion=1.26";
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
JSONArray dataJsonArr = null;
new Mytask().execute(url, params);
}
}
}));
}
private void checkLogin(String result) throws JSONException {
String url = "http://122.160.78.189:82/androidserver/LoginSalesPerson";
JSONArray user = null;
try{
// Creating new JSON Parser
///JSONParser jParser = new JSONParser();
// Getting JSON from URL
// JSONObject json = jParser.getJSONFromUrl(url);
if (result != null)
{
//JSONObject emp=(new JSONObject(url).getJSONObject("username"));
JSONObject emp = new JSONObject(result.toString());
String username=emp.getString("userName");
//String empspassword=emp.getString("password");
String str="username:"+username;
Intent intent = new Intent(MainActivity.this, Main2Activity.class);
intent.putExtra("username", str);
startActivity(intent);}
}catch (Exception e) {
e.printStackTrace();
}
}
// EditText usernameString = (EditText) findViewById(R.id.editText);
// String str = usernameString.getText().toString();
// if (sharedPreferences.equals(str)) {
// Intent intent = new Intent(MainActivity.this, Main2Activity.class);
// intent.putExtra("username", str);
//startActivity(intent);
// To retrieve value from shared preference in another activity
// sharedPreferences = getApplicationContext().getSharedPreferences(
// "sharedPrefName", 0);
// id = sharedPreferences.getString("key_name", "defaultvalue");
class Mytask extends AsyncTask<String, Void, String> {
// Runs in UI before background thread is called
#Override
protected void onPreExecute() {
setProgressBarVisibility(true);
// Do something like display a progress bar
}
// This is run in a background thread
#Override
protected String doInBackground(String... params) {
return getFromServer(params[0], params[1]);
}
// This runs in UI when background thread finishes
#Override
protected void onPostExecute(String result) {
try {
checkLogin(result);
} catch (JSONException e) {
e.printStackTrace();
}
}
public String getFromServer(String connectionString, String params) {
String response = "";
try {
// android.os.Debug.waitForDebugger();
URL url = new URL(connectionString);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setConnectTimeout(10 * 1000); //10 Seconds
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
con.setRequestProperty("Content-Length", "" + Integer.toString(params.getBytes().length));
con.setRequestProperty("Content-Language", "en-US");
con.setUseCaches(false);
con.setDoInput(true);
con.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(params);
wr.flush();
wr.close();
InputStream is = con.getInputStream();
response = read(is);
} catch (Exception e) {
e.printStackTrace();
} finally {
return response;
}
}
private String read(InputStream in) {
BufferedReader reader;
StringBuilder response = new StringBuilder();
try {
reader = new BufferedReader(new InputStreamReader(in));
String line;
while ((line = reader.readLine()) != null) {
response.append(line);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
return response.toString();
}
}
}
}
I am trying to start an activity "Display" which is supposed to start only after the user is authenticated (the usernames and passwords are stored in phpmyadmin database)
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
public class PatLogin extends Activity {
EditText a,b;
String login_name,login_pass;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.pat_login);
}
public void patbuttonClick(View v) {
if (v.getId() == R.id.patlogin) {
a = (EditText) findViewById(R.id.TFpusername);
b = (EditText) findViewById(R.id.TFppassword);
login_name = a.getText().toString();
login_pass = b.getText().toString();
String method = "login";
BackgroundTask backgroundTask = new BackgroundTask(this);
backgroundTask.execute(method,login_name,login_pass);
//If possible I would like to call the "Display" activity from here but only when the correct username and password is entered.
//If it's not possible to call from here then I would like to know how to call "Display" activity from "BackgrounTask.java".
}
}
}
The BackgroundTask.java is used to authenticate the user (check if the username and password match) through the phpmyadmin database.
import android.app.AlertDialog;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.widget.Toast;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
public class BackgroundTask extends AsyncTask<String,Void,String> {
AlertDialog alertDialog;
Context ctx;
BackgroundTask(Context ctx)
{
this.ctx =ctx;
}
int flag=0;
#Override
protected void onPreExecute() {
alertDialog = new AlertDialog.Builder(ctx).create();
alertDialog.setTitle("Login Information....");
}
#Override
protected String doInBackground(String... params) {
String login_url = "http://10.0.2.2/mobidoc/login.php";
String method = params[0];
if(method.equals("login"))
{
String login_name = params[1];
String login_pass = params[2];
try {
URL url = new URL(login_url);
HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
OutputStream outputStream = httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream,"UTF-8"));
String data = URLEncoder.encode("login_name","UTF-8")+"="+URLEncoder.encode(login_name,"UTF-8")+"&"+
URLEncoder.encode("login_pass","UTF-8")+"="+URLEncoder.encode(login_pass,"UTF-8");
bufferedWriter.write(data);
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"iso-8859-1"));
String response = "";
String line = "";
while ((line = bufferedReader.readLine())!=null)
{
response+= line;
}
bufferedReader.close();
inputStream.close();
httpURLConnection.disconnect();
return response;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
#Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
#Override
protected void onPostExecute(String result) {
if(result.equals("Registration Success..."))
{
Toast.makeText(ctx, result, Toast.LENGTH_LONG).show();
}
else
{
alertDialog.setMessage(result);
alertDialog.show();
//When I use the following 2 lines of code, It calls the Display activity even if the wrong password is entered. I need a certain condition to be applied.
Intent myIntent = new Intent(ctx, Display.class);
ctx.startActivity(myIntent);
}
}
}
So what I want to do is call an activity named "Display". This activity should be called only when the correct username and password is entered.
I am attaching the php file too, just for reference.
<?php
require "init.php";
$username = $_POST["login_name"];
$password = $_POST["login_pass"];
$password = md5($password);
$sql_query = "select name from pat_info where username like '$username' and password like '$password';";
$result = mysqli_query($con,$sql_query);
if(mysqli_num_rows($result)>0)
{
$row = mysqli_fetch_assoc($result);
$name = $row["name"];
echo "Login Success... Welcome ".$name;}
else{
echo "Login Failed...Try Again.";
}
Ok I got the solution to it. I had to compare the echo of the php file and compare it with "res" which stores the value of "result". The modified "BackgroundTask.java" is below:
import android.app.AlertDialog;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.widget.Toast;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
public class BackgroundTask extends AsyncTask<String,Void,String> {
AlertDialog alertDialog;
Context ctx;
String res;
BackgroundTask(Context ctx)
{
this.ctx =ctx;
}
int flag=0;
#Override
protected void onPreExecute() {
alertDialog = new AlertDialog.Builder(ctx).create();
alertDialog.setTitle("Login Information....");
}
#Override
protected String doInBackground(String... params) {
String login_url = "http://10.0.2.2/mobidoc/login.php";
String method = params[0];
if(method.equals("login"))
{
String login_name = params[1];
String login_pass = params[2];
try {
URL url = new URL(login_url);
HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
OutputStream outputStream = httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream,"UTF-8"));
String data = URLEncoder.encode("login_name","UTF-8")+"="+URLEncoder.encode(login_name,"UTF-8")+"&"+
URLEncoder.encode("login_pass","UTF-8")+"="+URLEncoder.encode(login_pass,"UTF-8");
bufferedWriter.write(data);
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"iso-8859-1"));
String response = "";
String line = "";
while ((line = bufferedReader.readLine())!=null)
{
response+= line;
}
bufferedReader.close();
inputStream.close();
httpURLConnection.disconnect();
//I stored the response in the following String variable (res)
res = response;
return response;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
#Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
#Override
protected void onPostExecute(String result) {
if(result.equals("Registration Success..."))
{
Toast.makeText(ctx, result, Toast.LENGTH_LONG).show();
}
else if(res.equals("Login Failed...Try Again."))
{
alertDialog.setMessage(result);
alertDialog.show();
}
else
{
alertDialog.setMessage(result);
alertDialog.show();
Intent myIntent = new Intent(ctx, Display.class);
ctx.startActivity(myIntent);
}
}
}
My problem is that I made a "web" with php to register, login and logout. What I really want to do is connect the web to my app in android studio, it worked before I put the page welcome in the website, but when I try to apply the changes, the app fails when I login.
The website:
http://saveds.esy.es/cas/login.php
The Android Studio code in java by directories:
JSONParser.java
package com.example.javi.myapplication2;
import android.util.Log;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(final String url) {
// Making HTTP request
try {
// Construct the client and the HTTP request.
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
// Execute the POST request and store the response locally.
HttpResponse httpResponse = httpClient.execute(httpPost);
// Extract data from the response.
HttpEntity httpEntity = httpResponse.getEntity();
// Open an inputStream with the data content.
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
// Create a BufferedReader to parse through the inputStream.
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
// Declare a string builder to help with the parsing.
StringBuilder sb = new StringBuilder();
// Declare a string to store the JSON object data in string form.
String line = null;
Login.java
package com.example.javi.myapplication2;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.AsyncTask;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Toast;
public class Login extends Activity implements OnClickListener {
private EditText user, pass;
private Button mSubmit, mRegister;
private CheckBox check;
private ProgressDialog pDialog;
// Clase JSONParser
JSONParser jsonParser = new JSONParser();
// si trabajan de manera local "localhost" :
// En windows tienen que ir, run CMD > ipconfig
// buscar su IP
// y poner de la siguiente manera
// "http://xxx.xxx.x.x:1234/cas/login.php";
private static final String LOGIN_URL = "http://saveds.esy.es/cas/login.php";
// La respuesta del JSON es
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
// setup input fields
user = (EditText) findViewById(R.id.username);
pass = (EditText) findViewById(R.id.password);
check = (CheckBox) findViewById(R.id.rememberme);
// setup buttons
mSubmit = (Button) findViewById(R.id.login);
mRegister = (Button) findViewById(R.id.register);
// register listeners
mSubmit.setOnClickListener(this);
mRegister.setOnClickListener(this);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.login:
new AttemptLogin().execute();
break;
case R.id.register:
Intent i = new Intent(this, Register.class);
startActivity(i);
break;
default:
break;
}
}
class AttemptLogin extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Login.this);
pDialog.setMessage("Attempting login...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
#Override
protected String doInBackground(String... args) {
int success;
String username = user.getText().toString();
String password = pass.getText().toString();
String rememberme = check.getText().toString();
try {
// Building Parameters
List params = new ArrayList();
params.add(new BasicNameValuePair("username", username));
params.add(new BasicNameValuePair("password", password));
params.add(new BasicNameValuePair("rememberme", rememberme));
Log.d("request!", "starting");
// getting product details by making HTTP request
JSONObject json = jsonParser.makeHttpRequest(LOGIN_URL, "POST",
params);
// check your log for json response
Log.d("Login attempt", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
Log.d("Login Successful!", json.toString());
// save user data
SharedPreferences sp = PreferenceManager
.getDefaultSharedPreferences(Login.this);
Editor edit = sp.edit();
edit.putString("username", username);
edit.commit();
Intent i = new Intent(Login.this, ReadComments.class);
finish();
startActivity(i);
return json.getString(TAG_MESSAGE);
} else {
Log.d("Login Failure!", json.getString(TAG_MESSAGE));
return json.getString(TAG_MESSAGE);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
// dismiss the dialog once product deleted
pDialog.dismiss();
if (file_url != null) {
Toast.makeText(Login.this, file_url, Toast.LENGTH_LONG).show();
}
}
}
}
ReadComments.java
package com.example.javi.myapplication2;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class ReadComments extends Activity implements OnClickListener{
private Button logout;
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
//si lo trabajan de manera local en xxx.xxx.x.x va su ip local
// private static final String REGISTER_URL = "http://xxx.xxx.x.x:1234/cas/register.php";
//testing on Emulator:
private static final String WELCOME_URL = "http://saveds.esy.es/cas/welcome.php";
//ids
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.read_comments);
logout=(Button)findViewById(R.id.logout);
logout.setOnClickListener(this);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
new Logoutclass().execute();
}
class Logoutclass extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(ReadComments.this);
pDialog.setMessage("Cerrando sesión...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
#Override
protected String doInBackground(String... args) {
// TODO Auto-generated method stub
// Check for success tag
int success;
String out=logout.getText().toString();
try {
// Building Parameters
List params = new ArrayList();
params.add(new BasicNameValuePair("username", out));
Log.d("request!", "starting");
//Posting user data to script
JSONObject json = jsonParser.makeHttpRequest(
WELCOME_URL, "POST", params);
// full json response
Log.d("Cerrando sesión", json.toString());
// json success element
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
Log.d("Sesión cerrada", json.toString());
finish();
return json.getString(TAG_MESSAGE);
}else{
Log.d("Fallo de cerrar sesión", json.getString(TAG_MESSAGE));
return json.getString(TAG_MESSAGE);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
// dismiss the dialog once product deleted
pDialog.dismiss();
if (file_url != null){
Toast.makeText(ReadComments.this, file_url, Toast.LENGTH_LONG).show();
}
}
}
}
register.java
package com.example.javi.myapplication2;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class Register extends Activity implements OnClickListener{
private EditText user, pass, nam, mail ;
private Button mRegister;
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
//si lo trabajan de manera local en xxx.xxx.x.x va su ip local
// private static final String REGISTER_URL = "http://xxx.xxx.x.x:1234/cas/register.php";
//testing on Emulator:
private static final String REGISTER_URL = "http://saveds.esy.es/cas/register.php";
//ids
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.register);
user = (EditText)findViewById(R.id.username);
pass = (EditText)findViewById(R.id.password);
nam = (EditText)findViewById(R.id.name);
mail = (EditText)findViewById(R.id.email);
mRegister = (Button)findViewById(R.id.register);
mRegister.setOnClickListener(this);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
new CreateUser().execute();
}
class CreateUser extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Register.this);
pDialog.setMessage("Creating User...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
#Override
protected String doInBackground(String... args) {
// TODO Auto-generated method stub
// Check for success tag
int success;
String email=mail.getText().toString();
String name = nam.getText().toString();
String username = user.getText().toString();
String password = pass.getText().toString();
try {
// Building Parameters
List params = new ArrayList();
params.add(new BasicNameValuePair("username", username));
params.add(new BasicNameValuePair("password", password));
params.add(new BasicNameValuePair("name", name));
params.add(new BasicNameValuePair("email", email));
Log.d("request!", "starting");
//Posting user data to script
JSONObject json = jsonParser.makeHttpRequest(
REGISTER_URL, "POST", params);
// full json response
Log.d("Registering attempt", json.toString());
// json success element
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
Log.d("User Created!", json.toString());
finish();
return json.getString(TAG_MESSAGE);
}else{
Log.d("Registering Failure!", json.getString(TAG_MESSAGE));
return json.getString(TAG_MESSAGE);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
// dismiss the dialog once product deleted
pDialog.dismiss();
if (file_url != null){
Toast.makeText(Register.this, file_url, Toast.LENGTH_LONG).show();
}
}
}
}
Do I have to put the PHP code?
The error:
1
2
Hey Pepe without seeing error whatever you got will make us complex to give you solution.
apart from that you can change your code like below
String data = URLEncoder.encode("user_email", "UTF-8")
+ "=" + URLEncoder.encode(user_email, "UTF-8");
data += "&" + URLEncoder.encode("user_password", "UTF-8") + "="
+ URLEncoder.encode(user_password, "UTF-8");
value = data;
URL url;
String response = "";
try {
url = new URL("Provide your URL here...");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(15000);
conn.setConnectTimeout(15000);
conn.setRequestMethod("POST");
conn.setDoInput(true);
conn.setDoOutput(true);
OutputStream os = conn.getOutputStream();
BufferedWriter writer = new BufferedWriter(
new OutputStreamWriter(os, "UTF-8"));
//writer.write(getPostDataString(postDataParams));
writer.write(value);
writer.flush();
writer.close();
os.close();
int responseCode = conn.getResponseCode();
if (responseCode == HttpsURLConnection.HTTP_OK) {
String line;
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
while ((line = br.readLine()) != null) {
response += line;
System.out.println(response);
}
} else {
response = "";
}
} catch (Exception e) {
e.printStackTrace();
}
Enjoy, Happy coding....
When you get this error, it means your window is leaking the progress dialog.
Try this
class AttemptLogin extends AsyncTask<String, String, String> {
ProgressDialog pDialog; // add your pDialog here
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Login.this, "Attempting to login",null);
}
You should not add the Intent in doInBackground, instead put them in onPostExecute. Read this article for logIn and logOut example.