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Cannot convert java.lang.string into json object

This project is about login where i am trying to login and getting this error.Cannot convert json obj to java.lang . String
what should i do to resolve this error?
i am getting an error in json object even when i was passing a string value now i change the string value to exact same value where i was getting an error .
I have tried many things to resolve it by making a string object and then passing it instead of response
But it then showed an error cannot expect a literal value ay character 1.
This is the PATH of the DB_FUNCTIONS.PHP that it is a string value.
/home/awesogp3/public_html/android_login_api/include/DB_Functions.php"
here is my DB_FUNCTIONS.PHP
<?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();
// verifying user password
$salt = $user['salt'];
$encrypted_password = $user['encrypted_password'];
$hash = $this->checkhashSSHA($salt, $password);
// check for password equality
if ($encrypted_password == $hash) {
// user authentication details are correct
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;
}
}
?>
Here is my LoginActivity.java where i am trying to login and getting this error.
package com.example.dhruv.bill;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.example.dhruv.bill.R;
import com.example.dhruv.bill.AppConfig;
import com.example.dhruv.bill.AppController;
import com.example.dhruv.bill.SQLiteHandler;
import com.example.dhruv.bill.SessionManager;
import com.android.volley.Request.Method;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.HashMap;
import java.util.Map;
public class LoginActivity extends Activity {
private static final String TAG = RegisterActivity.class.getSimpleName();
private Button btnLogin;
private Button btnLinkToRegister;
private EditText inputEmail;
private EditText inputPassword;
private ProgressDialog pDialog;
private SessionManager session;
private SQLiteHandler db;
public static final String ID_INTENTEXT = SQLiteHandler.KEY_NAME + "_INTENTEXTRA";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
allow_volley av = new allow_volley();
av.allow();
inputEmail = (EditText) findViewById(R.id.email);
inputPassword = (EditText) findViewById(R.id.password);
btnLogin = (Button) findViewById(R.id.btnLogin);
btnLinkToRegister = (Button) findViewById(R.id.btnLinkToRegisterScreen);
// Progress dialog
pDialog = new ProgressDialog(this);
pDialog.setCancelable(false);
// SQLite database handler
db = new SQLiteHandler(getApplicationContext());
// Session manager
session = new SessionManager(getApplicationContext());
// Check if user is already logged in or not
if (session.isLoggedIn()) {
// User is already logged in. Take him to main activity
Intent intent = new Intent(LoginActivity.this, MainActivity.class);
startActivity(intent);
finish();
}
// Login button Click Event
btnLogin.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
String email = inputEmail.getText().toString().trim();
String password = inputPassword.getText().toString().trim();
Log.d(TAG, "Login Response: " + email);
Log.d(TAG, "Login Response: " + password);
// Check for empty data in the form
if (!email.isEmpty() && !password.isEmpty()) {
// login user
checkLogin(email, password);
} else {
// Prompt user to enter credentials
Toast.makeText(getApplicationContext(),
"Please enter the credentials!", Toast.LENGTH_LONG)
.show();
}
}
});
// Link to Register Screen
btnLinkToRegister.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent i = new Intent(getApplicationContext(),
RegisterActivity.class);
startActivity(i);
finish();
}
});
}
/**
* function to verify login details in mysql db
* */
private void checkLogin(final String email, final String password) {
// Tag used to cancel the request
String tag_string_req = "req_login";
pDialog.setMessage("Logging in ...");
showDialog();
StringRequest strReq = new StringRequest(Method.POST,
AppConfig.URL_LOGIN, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Log.d(TAG, "Login Response: " + response.toString());
hideDialog();
try {
JSONObject jObj = new JSONObject(response);
boolean error = jObj.getBoolean("error");
// Check for error node in json
if (!error) {
// user successfully logged in
// Create login session
session.setLogin(true);
// Now store the user in SQLite
String uid = jObj.getString("uid");
JSONObject user = jObj.getJSONObject("user");
String name = user.getString("name");
String email = user.getString("email");
String created_at = user
.getString("created_at");
// Inserting row in users table
db.addUser(name, email, uid, created_at);
// Launch main activity
Intent intent = new Intent(LoginActivity.this,
MainActivity.class);
startActivity(intent);
finish();
} else {
// Error in login. Get the error message
String errorMsg = jObj.getString("error_msg");
Toast.makeText(getApplicationContext(),
errorMsg, Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
Toast.makeText(getApplicationContext(), "Json error: " + e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Login Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_LONG).show();
hideDialog();
}
}) {
#Override
protected Map<String, String> getParams() {
// Posting parameters to login url
Map<String, String> params = new HashMap<String, String>();
params.put("email", email);
params.put("password", password);
return params;
}
};
// Adding request to request queue
AppController.getInstance().addToRequestQueue(strReq, tag_string_req);
Log.d(TAG, "Login Response: " + email);
Log.d(TAG, "Login Response: " + password);
}
private void showDialog() {
if (!pDialog.isShowing())
pDialog.show();
}
private void hideDialog() {
if (pDialog.isShowing())
pDialog.dismiss();
}
}
This is the log cat
Notice: Use of undefined constant home - assumed 'home' in /home/awesogp3/public_html/android_login_api/include/DB_Functions.php on line 2
Notice: Use of undefined constant public_html - assumed 'public_html' in /home/awesogp3/public_html/android_login_api/include/DB_Functions.php on line 2
Warning: Division by zero in /home/awesogp3/public_html/android_login_api/include/DB_Functions.php on line 2
Notice: Use of undefined constant awesogp3 - assumed 'awesogp3' in /home/awesogp3/public_html/android_login_api/include/DB_Functions.php on line 2
Warning: Division by zero in /home/awesogp3/public_html/android_login_api/include/DB_Functions.php on line 2
Notice: Use of undefined constant android_login_api - assumed 'android_login_api' in /home/awesogp3/public_html/android_login_api/include/DB_Functions.php on line 2
Warning: Division by zero in /home/awesogp3/public_html/android_login_api/include/DB_Functions.php on line 2
false
Fatal error: Call to undefined method mysqli_stmt::get_result() in /home/awesogp3/public_html/android_login_api/include/DB_Functions.php on line 60

Authentication failed with twitter

I am trying to use the Twitter API to display tweets of a user, the problem is I got the following error message:
06-28 11:40:58.280: E/AndroidRuntime(3191): FATAL EXCEPTION: main
06-28 11:40:58.280: E/AndroidRuntime(3191): java.lang.IllegalStateException: Authentication credentials are missing. See http://twitter4j.org/en/configuration.html for details
06-28 11:40:58.280: E/AndroidRuntime(3191): at twitter4j.TwitterBaseImpl.ensureAuthorizationEnabled(TwitterBaseImpl.java:201)
06-28 11:40:58.280: E/AndroidRuntime(3191): at twitter4j.TwitterImpl.get(TwitterImpl.java:1941)
06-28 11:40:58.280: E/AndroidRuntime(3191): at twitter4j.TwitterImpl.getRetweets(TwitterImpl.java:209)
06-28 11:40:58.280: E/AndroidRuntime(3191): at com.androidhive.twitterconnect.MainActivity.afficherTweets(MainActivity.java:286)
06-28 11:40:58.280: E/AndroidRuntime(3191): at com.androidhive.twitterconnect.MainActivity.onClick(MainActivity.java:417)
06-28 11:40:58.280: E/AndroidRuntime(3191): at android.view.View.performClick(View.java:3620)
06-28 11:40:58.280: E/AndroidRuntime(3191): at android.view.View$PerformClick.run(View.java:14292)
06-28 11:40:58.280: E/AndroidRuntime(3191): at android.os.Handler.handleCallback(Handler.java:605)
06-28 11:40:58.280: E/AndroidRuntime(3191): at android.os.Handler.dispatchMessage(Handler.java:92)
06-28 11:40:58.280: E/AndroidRuntime(3191): at android.os.Looper.loop(Looper.java:137)
06-28 11:40:58.280: E/AndroidRuntime(3191): at android.app.ActivityThread.main(ActivityThread.java:4507)
06-28 11:40:58.280: E/AndroidRuntime(3191): at java.lang.reflect.Method.invokeNative(Native Method)
06-28 11:40:58.280: E/AndroidRuntime(3191): at java.lang.reflect.Method.invoke(Method.java:511)
06-28 11:40:58.280: E/AndroidRuntime(3191): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
06-28 11:40:58.280: E/AndroidRuntime(3191): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
06-28 11:40:58.280: E/AndroidRuntime(3191): at dalvik.system.NativeStart.main(Native Method)
And this is my code:
I changed them but in vain, this is my hole code:
package com.androidhive.twitterconnect;
import java.util.List;
import com.androidhive.twitterconnect.R;
import twitter4j.Status;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.User;
import twitter4j.auth.AccessToken;
import twitter4j.auth.RequestToken;
import twitter4j.conf.Configuration;
import twitter4j.conf.ConfigurationBuilder;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.content.pm.ActivityInfo;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.StrictMode;
import android.text.Html;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener {
// Constants
/**
* Register your here app https://dev.twitter.com/apps/new and get your
* consumer key and secret
* */
static String TWITTER_CONSUMER_KEY = "****************************";
static String TWITTER_CONSUMER_SECRET = "***********************************************";
// Preference Constants
static String PREFERENCE_NAME = "twitter_oauth";
static final String PREF_KEY_OAUTH_TOKEN = " 281012441-vTUstoGd5NpWjoviMDS87JxyS4mjj713CfPNCsh2";
static final String PREF_KEY_OAUTH_SECRET = " 4rfd76K1ZUQ0eb3Zss2q6huAZra4TmWnrtj3dPKODectP";
static final String PREF_KEY_TWITTER_LOGIN = "isTwitterLogedIn";
static final String TWITTER_CALLBACK_URL = "oauth://t4jsample";
// Twitter oauth urls
static final String URL_TWITTER_AUTH = "https://api.twitter.com/oauth/authorize";
static final String URL_TWITTER_OAUTH_VERIFIER = "oauth_verifier";
static final String URL_TWITTER_OAUTH_TOKEN = "https://api.twitter.com/oauth/access_token";
// Login button
Button btnLoginTwitter;
// Update status button
Button btnUpdateStatus;
// Logout button
Button btnLogoutTwitter;
Button btnDisplayTwitter;
// EditText for update
EditText txtUpdate;
// lbl update
TextView lblUpdate;
TextView lblUserName;
// Progress dialog
ProgressDialog pDialog;
// Twitter
private static Twitter twitter;
private static RequestToken requestToken;
// Shared Preferences
private static SharedPreferences mSharedPreferences;
// Internet Connection detector
private ConnectionDetector cd;
// Alert Dialog Manager
AlertDialogManager alert = new AlertDialogManager();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
btnDisplayTwitter = (Button) findViewById(R.id.button1);
btnDisplayTwitter.setOnClickListener(this);
cd = new ConnectionDetector(getApplicationContext());
// Check if Internet present
if (!cd.isConnectingToInternet()) {
// Internet Connection is not present
alert.showAlertDialog(MainActivity.this, "Internet Connection Error",
"Please connect to working Internet connection", false);
// stop executing code by return
return;
}
// Check if twitter keys are set
if(TWITTER_CONSUMER_KEY.trim().length() == 0 || TWITTER_CONSUMER_SECRET.trim().length() == 0){
// Internet Connection is not present
alert.showAlertDialog(MainActivity.this, "Twitter oAuth tokens", "Please set your twitter oauth tokens first!", false);
// stop executing code by return
return;
}
// All UI elements
btnLoginTwitter = (Button) findViewById(R.id.btnLoginTwitter);
btnUpdateStatus = (Button) findViewById(R.id.btnUpdateStatus);
btnLogoutTwitter = (Button) findViewById(R.id.btnLogoutTwitter);
txtUpdate = (EditText) findViewById(R.id.txtUpdateStatus);
lblUpdate = (TextView) findViewById(R.id.lblUpdate);
lblUserName = (TextView) findViewById(R.id.lblUserName);
// Shared Preferences
mSharedPreferences = getApplicationContext().getSharedPreferences(
"MyPref", 0);
/**
* Twitter login button click event will call loginToTwitter() function
* */
btnLoginTwitter.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// Call login twitter function
loginToTwitter();
}
});
/**
* Button click event to Update Status, will call updateTwitterStatus()
* function
* */
btnUpdateStatus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// Call update status function
// Get the status from EditText
String status = txtUpdate.getText().toString();
// Check for blank text
if (status.trim().length() > 0) {
// update status
new updateTwitterStatus().execute(status);
} else {
// EditText is empty
Toast.makeText(getApplicationContext(),
"Please enter status message", Toast.LENGTH_SHORT)
.show();
}
}
});
/**
* Button click event for logout from twitter
* */
btnLogoutTwitter.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// Call logout twitter function
logoutFromTwitter();
}
});
/** This if conditions is tested once is
* redirected from twitter page. Parse the uri to get oAuth
* Verifier
* */
if (!isTwitterLoggedInAlready()) {
Uri uri = getIntent().getData();
if (uri != null && uri.toString().startsWith(TWITTER_CALLBACK_URL)) {
// oAuth verifier
String verifier = uri
.getQueryParameter(URL_TWITTER_OAUTH_VERIFIER);
try {
// Get the access token
AccessToken accessToken = twitter.getOAuthAccessToken(
requestToken, verifier);
// Shared Preferences
Editor e = mSharedPreferences.edit();
// After getting access token, access token secret
// store them in application preferences
e.putString(PREF_KEY_OAUTH_TOKEN, accessToken.getToken());
e.putString(PREF_KEY_OAUTH_SECRET,
accessToken.getTokenSecret());
// Store login status - true
e.putBoolean(PREF_KEY_TWITTER_LOGIN, true);
e.commit(); // save changes
Log.e("Twitter OAuth Token", "> " + accessToken.getToken());
// Hide login button
btnLoginTwitter.setVisibility(View.GONE);
// Show Update Twitter
lblUpdate.setVisibility(View.VISIBLE);
txtUpdate.setVisibility(View.VISIBLE);
btnUpdateStatus.setVisibility(View.VISIBLE);
btnLogoutTwitter.setVisibility(View.VISIBLE);
// Getting user details from twitter
// For now i am getting his name only
long userID = accessToken.getUserId();
User user = twitter.showUser(userID);
String username = user.getName();
// Displaying in xml ui
lblUserName.setText(Html.fromHtml("<b>Welcome " + username + "</b>"));
} catch (Exception e) {
// Check log for login errors
Log.e("Twitter Login Error", "> " + e.getMessage());
}
}
}
}
/**
* Function to login twitter
* */
private void loginToTwitter() {
// Check if already logged in
if (!isTwitterLoggedInAlready()) {
ConfigurationBuilder builder = new ConfigurationBuilder();
builder.setOAuthConsumerKey(TWITTER_CONSUMER_KEY);
builder.setOAuthConsumerSecret(TWITTER_CONSUMER_SECRET);
Configuration configuration = builder.build();
TwitterFactory factory = new TwitterFactory(configuration);
twitter = factory.getInstance();
try {
requestToken = twitter
.getOAuthRequestToken(TWITTER_CALLBACK_URL);
this.startActivity(new Intent(Intent.ACTION_VIEW, Uri
.parse(requestToken.getAuthenticationURL())));
} catch (TwitterException e) {
e.printStackTrace();
}
} else {
// user already logged into twitter
Toast.makeText(getApplicationContext(),
"Already Logged into twitter", Toast.LENGTH_LONG).show();
}
}
////////////////////////////////
public void displayTweets() throws TwitterException{
/*
Uri uri = getIntent().getData();
String verifier = uri.getQueryParameter(URL_TWITTER_OAUTH_VERIFIER);
AccessToken accessToken = twitter.getOAuthAccessToken(requestToken, verifier);*/
//Access Token
String access_token = mSharedPreferences.getString(PREF_KEY_OAUTH_TOKEN, "");
// Access Token Secret
String access_token_secret = mSharedPreferences.getString(PREF_KEY_OAUTH_SECRET, "");
AccessToken accessToken = new AccessToken(access_token, access_token_secret);
long userID = accessToken.getUserId();
System.out.println("==> "+userID);
try {
Twitter twitter = new TwitterFactory().getInstance();
//List<Status > statuses = twitter.getRetweets(Long.parseLong(args[0]));
List<Status> statuses = twitter.getRetweets(userID);
for (Status status : statuses) {
System.out.println("#" + status.getUser().getScreenName() + " - " + status.getText());
}
System.out.println("done.");
System.exit(0);
} catch (TwitterException te) {
te.printStackTrace();
System.out.println("Failed to get retweets: " + te.getMessage());
System.exit(-1);
}
}
///////////////////////////////
/**
* Function to update status
* */
class updateTwitterStatus extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Updating to twitter...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting Places JSON
* */
protected String doInBackground(String... args) {
Log.d("Tweet Text", "> " + args[0]);
String status = args[0];
try {
ConfigurationBuilder builder = new ConfigurationBuilder();
builder.setOAuthConsumerKey(TWITTER_CONSUMER_KEY);
builder.setOAuthConsumerSecret(TWITTER_CONSUMER_SECRET);
// Access Token
String access_token = mSharedPreferences.getString(PREF_KEY_OAUTH_TOKEN, "");
// Access Token Secret
String access_token_secret = mSharedPreferences.getString(PREF_KEY_OAUTH_SECRET, "");
AccessToken accessToken = new AccessToken(access_token, access_token_secret);
Twitter twitter = new TwitterFactory(builder.build()).getInstance(accessToken);
// Update status
twitter4j.Status response = twitter.updateStatus(status);
Log.d("Status", "> " + response.getText());
} catch (TwitterException e) {
// Error in updating status
Log.d("Twitter Update Error", e.getMessage());
}
return null;
}
/**
* After completing background task Dismiss the progress dialog and show
* the data in UI Always use runOnUiThread(new Runnable()) to update UI
* from background thread, otherwise you will get error
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(),
"Status tweeted successfully", Toast.LENGTH_SHORT)
.show();
// Clearing EditText field
txtUpdate.setText("");
}
});
}
}
/**
* Function to logout from twitter
* It will just clear the application shared preferences
* */
private void logoutFromTwitter() {
// Clear the shared preferences
Editor e = mSharedPreferences.edit();
e.remove(PREF_KEY_OAUTH_TOKEN);
e.remove(PREF_KEY_OAUTH_SECRET);
e.remove(PREF_KEY_TWITTER_LOGIN);
e.commit();
// After this take the appropriate action
// I am showing the hiding/showing buttons again
// You might not needed this code
btnLogoutTwitter.setVisibility(View.GONE);
btnUpdateStatus.setVisibility(View.GONE);
txtUpdate.setVisibility(View.GONE);
lblUpdate.setVisibility(View.GONE);
lblUserName.setText("");
lblUserName.setVisibility(View.GONE);
btnLoginTwitter.setVisibility(View.VISIBLE);
}
/**
* Check user already logged in your application using twitter Login flag is
* fetched from Shared Preferences
* */
private boolean isTwitterLoggedInAlready() {
// return twitter login status from Shared Preferences
return mSharedPreferences.getBoolean(PREF_KEY_TWITTER_LOGIN, false);
}
protected void onResume() {
super.onResume();
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(v == btnDisplayTwitter){
try {
afficherTweets();
} catch (TwitterException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
What's wrong?

Authentication credentials are missing.
You're missing credentials somewhere.
From your code, I'd say these :
**
* Register your here app https://dev.twitter.com/apps/new and get your
* consumer key and secret
* */
static String TWITTER_CONSUMER_KEY = "****************************";
static String TWITTER_CONSUMER_SECRET = "***********************************************";

android twitter integration using AsyncTask

plz help me in integrating twitter in my android app account using AsyncTask . I m following androidhive tutorial on integrating twitter account but i am getting Network on main thread exception.
Thanks in advance :D
This is the link of code
http://www.androidhive.info/2012/09/android-twitter-oauth-connect-tutorial/
and this is my MainActivity.java
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.User;
import twitter4j.auth.AccessToken;
import twitter4j.auth.RequestToken;
import twitter4j.conf.Configuration;
import twitter4j.conf.ConfigurationBuilder;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.content.pm.ActivityInfo;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Html;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
// Constants
/**
* Register your here app https://dev.twitter.com/apps/new and get your
* consumer key and secret
* */
static String TWITTER_CONSUMER_KEY = ""; // place your cosumer key here
static String TWITTER_CONSUMER_SECRET = ""; // place your consumer secret here
// Preference Constants
static String PREFERENCE_NAME = "twitter_oauth";
static final String PREF_KEY_OAUTH_TOKEN = "oauth_token";
static final String PREF_KEY_OAUTH_SECRET = "oauth_token_secret";
static final String PREF_KEY_TWITTER_LOGIN = "isTwitterLogedIn";
static final String TWITTER_CALLBACK_URL = "oauth://t4jsample";
// Twitter oauth urls
static final String URL_TWITTER_AUTH = "auth_url";
static final String URL_TWITTER_OAUTH_VERIFIER = "oauth_verifier";
static final String URL_TWITTER_OAUTH_TOKEN = "oauth_token";
// Login button
Button btnLoginTwitter;
// Update status button
Button btnUpdateStatus;
// Logout button
Button btnLogoutTwitter;
// EditText for update
EditText txtUpdate;
// lbl update
TextView lblUpdate;
TextView lblUserName;
// Progress dialog
ProgressDialog pDialog;
// Twitter
private static Twitter twitter;
private static RequestToken requestToken;
// Shared Preferences
private static SharedPreferences mSharedPreferences;
// Internet Connection detector
private ConnectionDetector cd;
// Alert Dialog Manager
AlertDialogManager alert = new AlertDialogManager();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
cd = new ConnectionDetector(getApplicationContext());
// Check if Internet present
if (!cd.isConnectingToInternet()) {
// Internet Connection is not present
alert.showAlertDialog(MainActivity.this, "Internet Connection Error",
"Please connect to working Internet connection", false);
// stop executing code by return
return;
}
// Check if twitter keys are set
if(TWITTER_CONSUMER_KEY.trim().length() == 0 || TWITTER_CONSUMER_SECRET.trim().length() == 0){
// Internet Connection is not present
alert.showAlertDialog(MainActivity.this, "Twitter oAuth tokens", "Please set your twitter oauth tokens first!", false);
// stop executing code by return
return;
}
// All UI elements
btnLoginTwitter = (Button) findViewById(R.id.btnLoginTwitter);
btnUpdateStatus = (Button) findViewById(R.id.btnUpdateStatus);
btnLogoutTwitter = (Button) findViewById(R.id.btnLogoutTwitter);
txtUpdate = (EditText) findViewById(R.id.txtUpdateStatus);
lblUpdate = (TextView) findViewById(R.id.lblUpdate);
lblUserName = (TextView) findViewById(R.id.lblUserName);
// Shared Preferences
mSharedPreferences = getApplicationContext().getSharedPreferences(
"MyPref", 0);
/**
* Twitter login button click event will call loginToTwitter() function
* */
btnLoginTwitter.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// Call login twitter function
loginToTwitter();
}
});
/**
* Button click event to Update Status, will call updateTwitterStatus()
* function
* */
btnUpdateStatus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// Call update status function
// Get the status from EditText
String status = txtUpdate.getText().toString();
// Check for blank text
if (status.trim().length() > 0) {
// update status
new updateTwitterStatus().execute(status);
} else {
// EditText is empty
Toast.makeText(getApplicationContext(),
"Please enter status message", Toast.LENGTH_SHORT)
.show();
}
}
});
/**
* Button click event for logout from twitter
* */
btnLogoutTwitter.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// Call logout twitter function
logoutFromTwitter();
}
});
/** This if conditions is tested once is
* redirected from twitter page. Parse the uri to get oAuth
* Verifier
* */
if (!isTwitterLoggedInAlready()) {
Uri uri = getIntent().getData();
if (uri != null && uri.toString().startsWith(TWITTER_CALLBACK_URL)) {
// oAuth verifier
String verifier = uri
.getQueryParameter(URL_TWITTER_OAUTH_VERIFIER);
try {
// Get the access token
AccessToken accessToken = twitter.getOAuthAccessToken(
requestToken, verifier);
// Shared Preferences
Editor e = mSharedPreferences.edit();
// After getting access token, access token secret
// store them in application preferences
e.putString(PREF_KEY_OAUTH_TOKEN, accessToken.getToken());
e.putString(PREF_KEY_OAUTH_SECRET,
accessToken.getTokenSecret());
// Store login status - true
e.putBoolean(PREF_KEY_TWITTER_LOGIN, true);
e.commit(); // save changes
Log.e("Twitter OAuth Token", "> " + accessToken.getToken());
// Hide login button
btnLoginTwitter.setVisibility(View.GONE);
// Show Update Twitter
lblUpdate.setVisibility(View.VISIBLE);
txtUpdate.setVisibility(View.VISIBLE);
btnUpdateStatus.setVisibility(View.VISIBLE);
btnLogoutTwitter.setVisibility(View.VISIBLE);
// Getting user details from twitter
// For now i am getting his name only
long userID = accessToken.getUserId();
User user = twitter.showUser(userID);
String username = user.getName();
// Displaying in xml ui
lblUserName.setText(Html.fromHtml("<b>Welcome " + username + "</b>"));
} catch (Exception e) {
// Check log for login errors
Log.e("Twitter Login Error", "> " + e.getMessage());
}
}
}
}
/**
* Function to login twitter
* */
private void loginToTwitter() {
// Check if already logged in
if (!isTwitterLoggedInAlready()) {
ConfigurationBuilder builder = new ConfigurationBuilder();
builder.setOAuthConsumerKey(TWITTER_CONSUMER_KEY);
builder.setOAuthConsumerSecret(TWITTER_CONSUMER_SECRET);
Configuration configuration = builder.build();
TwitterFactory factory = new TwitterFactory(configuration);
twitter = factory.getInstance();
try {
requestToken = twitter
.getOAuthRequestToken(TWITTER_CALLBACK_URL);
this.startActivity(new Intent(Intent.ACTION_VIEW, Uri
.parse(requestToken.getAuthenticationURL())));
} catch (TwitterException e) {
e.printStackTrace();
}
} else {
// user already logged into twitter
Toast.makeText(getApplicationContext(),
"Already Logged into twitter", Toast.LENGTH_LONG).show();
}
}
/**
* Function to update status
* */
class updateTwitterStatus extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Updating to twitter...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting Places JSON
* */
protected String doInBackground(String... args) {
Log.d("Tweet Text", "> " + args[0]);
String status = args[0];
try {
ConfigurationBuilder builder = new ConfigurationBuilder();
builder.setOAuthConsumerKey(TWITTER_CONSUMER_KEY);
builder.setOAuthConsumerSecret(TWITTER_CONSUMER_SECRET);
// Access Token
String access_token = mSharedPreferences.getString(PREF_KEY_OAUTH_TOKEN, "");
// Access Token Secret
String access_token_secret = mSharedPreferences.getString(PREF_KEY_OAUTH_SECRET, "");
AccessToken accessToken = new AccessToken(access_token, access_token_secret);
Twitter twitter = new TwitterFactory(builder.build()).getInstance(accessToken);
// Update status
twitter4j.Status response = twitter.updateStatus(status);
Log.d("Status", "> " + response.getText());
} catch (TwitterException e) {
// Error in updating status
Log.d("Twitter Update Error", e.getMessage());
}
return null;
}
/**
* After completing background task Dismiss the progress dialog and show
* the data in UI Always use runOnUiThread(new Runnable()) to update UI
* from background thread, otherwise you will get error
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(),
"Status tweeted successfully", Toast.LENGTH_SHORT)
.show();
// Clearing EditText field
txtUpdate.setText("");
}
});
}
}
/**
* Function to logout from twitter
* It will just clear the application shared preferences
* */
private void logoutFromTwitter() {
// Clear the shared preferences
Editor e = mSharedPreferences.edit();
e.remove(PREF_KEY_OAUTH_TOKEN);
e.remove(PREF_KEY_OAUTH_SECRET);
e.remove(PREF_KEY_TWITTER_LOGIN);
e.commit();
// After this take the appropriate action
// I am showing the hiding/showing buttons again
// You might not needed this code
btnLogoutTwitter.setVisibility(View.GONE);
btnUpdateStatus.setVisibility(View.GONE);
txtUpdate.setVisibility(View.GONE);
lblUpdate.setVisibility(View.GONE);
lblUserName.setText("");
lblUserName.setVisibility(View.GONE);
btnLoginTwitter.setVisibility(View.VISIBLE);
}
/**
* Check user already logged in your application using twitter Login flag is
* fetched from Shared Preferences
* */
private boolean isTwitterLoggedInAlready() {
// return twitter login status from Shared Preferences
return mSharedPreferences.getBoolean(PREF_KEY_TWITTER_LOGIN, false);
}
protected void onResume() {
super.onResume();
}
}

You might got this error most probably in 4.0 device or IF the http conncetion is taking too long to respond.
if you dont know asynctask then simple solution will be
public static boolean isAuthenticated(Context context) {
new Thread() {
#Override
public void run() {
TwitterPrefrences twitterPref = new TwitterPrefrences(context);
String token = twitterPref.getTwitterAuthToken();
String secret = twitterPref.getTwitterAuthTokenSecrate();
AccessToken a = new AccessToken(token,secret);
Twitter twitter = new TwitterFactory().getInstance();
twitter.setOAuthConsumer(Constants.TWITT_CONSUMER_KEY,Constants.TWITT_CONSUMER_SECRET);
twitter.setOAuthAccessToken(a);
try {
twitter.getAccountSettings();
return true;
} catch (TwitterException e) {
return false;
}
}
}.start();
}

IllegalStateException in Twitter Integration

I am trying to integrate twitter in Android and following Twitter4j library. I have given the right consumer key and secret and have added the needed lines in manifest. Have added the Callback_URL in twitter. At first, I was able to login successfully but later it started throwing IllegalStateExcetpion.
MainActivity.java :
package com.example.feb_1twitterintegration;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.view.Menu;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.User;
import twitter4j.auth.AccessToken;
import twitter4j.auth.RequestToken;
import twitter4j.conf.Configuration;
import twitter4j.conf.ConfigurationBuilder;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.content.pm.ActivityInfo;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.StrictMode;
import android.text.Html;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity {
static String TWITTER_CONSUMER_KEY = "XXXXXX";
static String TWITTER_CONSUMER_SECRET = "XXXXXX";
static String PREFERENCE_NAME = "twitter_oauth";
static final String PREF_KEY_OAUTH_TOKEN = "oauth_token";
static final String PREF_KEY_OAUTH_SECRET = "oauth_token_secret";
static final String PREF_KEY_TWITTER_LOGIN = "isTwitterLogedIn";
static final String TWITTER_CALLBACK_URL = "oauth://t4jsample";
static final String URL_TWITTER_AUTH = "auth_url";
static final String URL_TWITTER_OAUTH_VERIFIER = "oauth_verifier";
static final String URL_TWITTER_OAUTH_TOKEN = "oauth_token";
ProgressDialog pDialog;
private static Twitter twitter;
private static RequestToken requestToken = new RequestToken(PREF_KEY_OAUTH_TOKEN, PREF_KEY_OAUTH_SECRET);
private static SharedPreferences mSharedPreferences;
private ConnectionDetector cd;
AlertDialogManager alert = new AlertDialogManager();
EditText sts;
#SuppressLint("NewApi")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
}
cd = new ConnectionDetector(getApplicationContext());
if (!cd.isConnectingToInternet()) {
alert.showAlertDialog(MainActivity.this,
"Internet Connection Error",
"Please connect to working Internet connection", false);
return;
}
// Check if twitter keys are set
if (TWITTER_CONSUMER_KEY.trim().length() == 0
|| TWITTER_CONSUMER_SECRET.trim().length() == 0) {
alert.showAlertDialog(MainActivity.this, "Twitter oAuth tokens",
"Please set your twitter oauth tokens first!", false);
return;
}
mSharedPreferences = getApplicationContext().getSharedPreferences(
"MyPref", 0);
findViewById(R.id.login).setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
loginToTwitter();
}
});
findViewById(R.id.tweet).setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
sts = (EditText) findViewById(R.id.editText1);
String status = sts.getText().toString();
if (status.trim().length() > 0) {
new updateTwitterStatus().execute(status);
} else {
Toast.makeText(getApplicationContext(),
"Please enter status message",
Toast.LENGTH_SHORT).show();
}
}
});
if (!isTwitterLoggedInAlready()) {
final String verifier;
Uri uri = getIntent().getData();
if (uri != null && uri.toString().startsWith(TWITTER_CALLBACK_URL)) {
//verifier = uri.getQueryParameter(URL_TWITTER_OAUTH_VERIFIER);
verifier = uri.getQueryParameter(URL_TWITTER_OAUTH_VERIFIER);
System.out.println(verifier);
try {
System.out.println("Request token: "+requestToken.getAuthenticationURL());
requestToken = twitter.getOAuthRequestToken(TWITTER_CALLBACK_URL);
System.out.println("after login");
AccessToken accessToken = twitter.getOAuthAccessToken(requestToken);
System.out.println(accessToken.getToken());
// Shared Preferences
Editor e = mSharedPreferences.edit();
e.putString(PREF_KEY_OAUTH_TOKEN, accessToken.getToken());
e.putString(PREF_KEY_OAUTH_SECRET,
accessToken.getTokenSecret());
e.putBoolean(PREF_KEY_TWITTER_LOGIN, true);
e.commit();
Log.e("Twitter OAuth Token", "> " + accessToken.getToken());
findViewById(R.id.login).setVisibility(View.GONE);
findViewById(R.id.editText1).setVisibility(View.VISIBLE);
findViewById(R.id.tweet).setVisibility(View.VISIBLE);
long userID = accessToken.getUserId();
User user = twitter.showUser(userID);
String username = user.getName();
Log.e("UserID: ", "userID: " + userID + "" + username);
Log.v("Welcome:",
"Thanks:"
+ Html.fromHtml("<b>Welcome " + username
+ "</b>"));
} catch (Exception e) {
Toast.makeText(MainActivity.this, e.getMessage(), 1000)
.show();
Log.e("Twitter Login Error", "> " + e.getMessage());
e.printStackTrace();
}
}
}
}
private void loginToTwitter() {
if (!isTwitterLoggedInAlready()) {
new Thread() {
#Override
public void run() {
// TODO Auto-generated method stub
super.run();
ConfigurationBuilder builder = new ConfigurationBuilder();
builder.setOAuthConsumerKey(TWITTER_CONSUMER_KEY);
builder.setOAuthConsumerSecret(TWITTER_CONSUMER_SECRET);
builder.setUseSSL(true);
builder.setApplicationOnlyAuthEnabled(true);
/*configurationBuilder.setOAuth2TokenType(getOAuth2Token().getTokenType());
configurationBuilder.setOAuth2AccessToken(getOAuth2Token().getAccessToken());*/
Configuration configuration = builder.build();
TwitterFactory factory = new TwitterFactory(configuration);
twitter4j.Twitter twitter = factory.getInstance();
try {
System.out.println("Request token: "+requestToken.getAuthenticationURL());
requestToken = twitter.getOAuthRequestToken(TWITTER_CALLBACK_URL);
System.out.println("Req Token: "+requestToken);
MainActivity.this.startActivity(new Intent(
Intent.ACTION_VIEW, Uri.parse(requestToken
.getAuthenticationURL())));
} catch (TwitterException e) {
e.printStackTrace();
}
}
}.start();
} else {
Toast.makeText(getApplicationContext(),
"Already Logged into twitter", Toast.LENGTH_LONG).show();
}
}
private boolean isTwitterLoggedInAlready() {
System.out.println("Request Token in already logged in twitter: "+requestToken);
return mSharedPreferences.getBoolean(PREF_KEY_TWITTER_LOGIN, false);
}
class updateTwitterStatus extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Updating to twitter...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
protected String doInBackground(String... args) {
Log.d("Tweet Text", "> " + args[0]);
String status = args[0];
try {
ConfigurationBuilder builder = new ConfigurationBuilder();
builder.setOAuthConsumerKey(TWITTER_CONSUMER_KEY);
builder.setOAuthConsumerSecret(TWITTER_CONSUMER_SECRET);
// Access Token
String access_token = mSharedPreferences.getString(
PREF_KEY_OAUTH_TOKEN, "");
// Access Token Secret
String access_token_secret = mSharedPreferences.getString(
PREF_KEY_OAUTH_SECRET, "");
AccessToken accessToken = new AccessToken(access_token,
access_token_secret);
Twitter twitter = new TwitterFactory(builder.build())
.getInstance(accessToken);
// Update status
twitter4j.Status response = twitter.updateStatus(status);
Log.d("Status", "> " + response.getText());
} catch (TwitterException e) {
// Error in updating status
Log.d("Twitter Update Error", e.getMessage());
}
return null;
}
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(),
"Status tweeted successfully", Toast.LENGTH_SHORT)
.show();
// Clearing EditText field
sts.setText("");
}
});
}
}
}
Logcat :
02-03 14:01:54.407: D/Network(21178): NETWORKnAME: WIFI
02-03 14:01:54.407: I/System.out(21178): Request Token in already logged in twitter: OAuthToken{token='oauth_token', tokenSecret='oauth_token_secret', secretKeySpec=null}
02-03 14:01:54.447: D/libEGL(21178): loaded /system/lib/egl/libGLES_android.so
02-03 14:01:54.467: D/libEGL(21178): loaded /system/lib/egl/libEGL_adreno200.so
02-03 14:01:54.487: D/libEGL(21178): loaded /system/lib/egl/libGLESv1_CM_adreno200.so
02-03 14:01:54.487: D/libEGL(21178): loaded /system/lib/egl/libGLESv2_adreno200.so
02-03 14:01:54.567: I/Adreno200-EGLSUB(21178): <ConfigWindowMatch:2078>: Format RGBA_8888.
02-03 14:01:54.577: D/OpenGLRenderer(21178): Enabling debug mode 0
02-03 14:01:54.627: D/OpenGLRenderer(21178): has fontRender patch
02-03 14:01:54.657: D/OpenGLRenderer(21178): has fontRender patch
02-03 14:01:56.128: I/System.out(21178): Request Token in already logged in twitter: OAuthToken{token='oauth_token', tokenSecret='oauth_token_secret', secretKeySpec=null}
02-03 14:01:56.168: I/System.out(21178): Request token: https://api.twitter.com/oauth/authenticate?oauth_token=oauth_token
02-03 14:01:56.168: W/dalvikvm(21178): threadid=11: thread exiting with uncaught exception (group=0x40aa9228)
02-03 14:01:56.178: E/AndroidRuntime(21178): FATAL EXCEPTION: Thread-65119
02-03 14:01:56.178: E/AndroidRuntime(21178): java.lang.IllegalStateException: OAuth consumer key/secret combination not supplied
02-03 14:01:56.178: E/AndroidRuntime(21178): at twitter4j.TwitterBaseImpl.getOAuth(TwitterBaseImpl.java:403)
02-03 14:01:56.178: E/AndroidRuntime(21178): at twitter4j.TwitterBaseImpl.getOAuthRequestToken(TwitterBaseImpl.java:298)
02-03 14:01:56.178: E/AndroidRuntime(21178): at com.example.feb_1twitterintegration.MainActivity$3.run(MainActivity.java:166)
02-03 14:01:58.741: D/OpenGLRenderer(21178): Flushing caches (mode 0)
02-03 14:01:58.751: D/memalloc(21178): /dev/pmem: Unmapping buffer base:0x52368000 size:3072000 offset:1536000
And the line where it implies for error is as follows :
requestToken = twitter.getOAuthRequestToken(TWITTER_CALLBACK_URL);
Any idea on what might be causing this issue to appear suddenly. I have been working on this for the past 2 days but this error has appeared from nowhere. Any help will be highly appreciated. Thanks in advance.

Your error is pretty straighforward. Logcat tells you this:
FATAL EXCEPTION: Thread-65119
02-03 14:01:56.178: E/AndroidRuntime(21178): java.lang.IllegalStateException: OAuth consumer key/secret combination not supplied
You need to declare your Twitter twitter object as a class variable, because you are setting the consumer and secret keys only to an instance of the object, but when you are requesting the auth token, you get a new instance of it, that doesn't have the configuration for the keys set.
private static Twitter twitter;
Then use this twitter object in the private void loginToTwitter(), and replace this:
twitter4j.Twitter twitter = factory.getInstance();
with
twitter = factory.getInstance();
where your twitter object is now a class iVar.
Here is a sample from my own implementation, that should help you:
public class TwitterRequestTokenActivity extends Activity {
final String TAG = getClass().getName();
// Twitter oauth urls
static final String URL_TWITTER_AUTH = "auth_url";
static final String URL_TWITTER_OAUTH_VERIFIER = "oauth_verifier";
static final String URL_TWITTER_OAUTH_DENIED = "denied";
static final String URL_TWITTER_OAUTH_TOKEN = "oauth_token";
static final String TWITTER_CALLBACK_URL = "appnameoauth://twitterLogin";
private static Twitter twitter;
private static RequestToken requestToken;
private AccessToken accessToken;
/** Progress */
ProgressDialog mProgressDialog;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
authenticate();
}
#Override
public void onDestroy() {
super.onDestroy();
}
/**
* Called when the OAuthRequestTokenTask finishes (user has authorized the request token).
* The callback URL will be intercepted here.
*/
#Override
public void onNewIntent(Intent intent)
{
super.onNewIntent(intent);
final Uri uri = intent.getData();
if (uri != null && uri.toString().startsWith(TWITTER_CALLBACK_URL)) {
//check if user did cancel the twitter auth
final String error = uri.getQueryParameter(URL_TWITTER_OAUTH_DENIED);
if (error==null)
getTwitterAccessToken(uri);
else {
// Login failed
Toast.makeText(TwitterRequestTokenActivity.this, getString(R.string.twitter_login_failed), Toast.LENGTH_LONG).show();
//user did not authenticate
finish();
}
}
else {
// Assume error: such as no connection
Toast.makeText(TwitterRequestTokenActivity.this, getString(R.string.twitter_login_failed), Toast.LENGTH_LONG).show();
finish();
}
}
/**
* Gets our token data once we obtain our accessToken from the asyncTask
*/
private void uploadToken() {
// upload data to our server
mProgressDialog = ProgressDialog.show(TwitterRequestTokenActivity.this, getString(R.string.generic_wait), getString(R.string.generic_sync), true, false);
// Getting user details from twitter
long userID = accessToken.getUserId();
//upload code to our server (irrelevant to question)
}
private void getTwitterAccessToken(Uri uri) {
mProgressDialog = ProgressDialog.show(TwitterRequestTokenActivity.this, getString(R.string.generic_wait), getString(R.string.twitter_logging_in), true, false);
final String verifier = uri.getQueryParameter(URL_TWITTER_OAUTH_VERIFIER);
// get the Token from Twitter
AsyncTask<Void, Void, Void> tokenTask = new AsyncTask<Void, Void, Void>() {
#Override
protected Void doInBackground(Void... params) {
try {
TwitterRequestTokenActivity.this.accessToken = twitter.getOAuthAccessToken(requestToken, verifier);
}
catch (Exception e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
hideProgress();
if (TwitterRequestTokenActivity.this.accessToken==null){
hideProgress();
finish();
}
else
uploadToken();
}
};
tokenTask.execute();
}
/**
* Starts the oAuth request with our callback URL
*/
private void authenticate() {
ConfigurationBuilder builder = new ConfigurationBuilder();
builder.setOAuthConsumerKey(Global.TWITTER_CONSUMER_KEY);
builder.setOAuthConsumerSecret(Global.TWITTER_CONSUMER_SECRET);
Configuration configuration = builder.build();
TwitterFactory factory = new TwitterFactory(configuration);
twitter = factory.getInstance();
Thread thread = new Thread(new Runnable(){
#Override
public void run() {
try {
requestToken = twitter.getOAuthRequestToken(TWITTER_CALLBACK_URL);
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(requestToken.getAuthenticationURL())).setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_FROM_BACKGROUND);
TwitterRequestTokenActivity.this.startActivity(intent);
}
catch (Exception e) {
finish();
}
}
});
thread.start();
}
/**
* Hides the progress bar
*/
private void hideProgress() {
try {
mProgressDialog.dismiss();
} catch (Exception e) {}
}
}
Also you need to make sure this activity is declared in your manifest as single task and set to listen to your custom oAUTH callback url:
<activity
android:name=".twitter.TwitterRequestTokenActivity"
android:configChanges="keyboardHidden|orientation"
android:launchMode="singleTask" >
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data
android:host="twitterLogin"
android:scheme="appnameoauth" />
</intent-filter>
</activity>

I fixed that same issue. its blocking on your ui. u just try it in asynctask. u just call that code inside a asynctask.
requestToken = twitter.getOAuthRequestToken(TWITTER_CALLBACK_URL);
or
like this,
class TwitterLogin extends AsyncTask<String, String, String>
{
#Override
protected String doInBackground(String... params)
{
// TODO Auto-generated method stub
Uri uri = getIntent().getData();
if (uri != null && uri.toString().startsWith(TWITTER_CALLBACK_URL))
{
String verifier = uri.getQueryParameter(URL_TWITTER_OAUTH_VERIFIER);
try
{
AccessToken accessToken = twitter.getOAuthAccessToken(requestToken, verifier);
// Shared Preferences
Editor e = loginPrefs.edit();
e.putString(PREF_KEY_OAUTH_TOKEN, accessToken.getToken());
e.putString(PREF_KEY_OAUTH_SECRET,accessToken.getTokenSecret());
e.putBoolean(PREF_KEY_TWITTER_LOGIN, true);
e.commit();
Log.e("Twitter OAuth Token", "> " + accessToken.getToken());
long userID = accessToken.getUserId();
User user = twitter.showUser(userID);
String username = user.getName();
Log.e("UserID: ", "userID: "+userID+""+username);
Log.v("Welcome:","Thanks:"+Html.fromHtml("<b>Welcome " + username + "</b>"));
}
catch (Exception e)
{
Log.e("Twitter Login Error", "> " + e.getMessage());
}
}
return null;
}
#Override
protected void onPostExecute(String result)
{
// TODO Auto-generated method stub
super.onPostExecute(result);
}
#Override
protected void onPreExecute()
{
// TODO Auto-generated method stub
super.onPreExecute();
}
}

android twitter integration exception

i want to integration a twitter in my application,
this is my code:
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.User;
import twitter4j.auth.AccessToken;
import twitter4j.auth.RequestToken;
import twitter4j.conf.Configuration;
import twitter4j.conf.ConfigurationBuilder;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.content.pm.ActivityInfo;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Html;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
// Constants
/**
* Register your here app https://dev.twitter.com/apps/new and get your
* consumer key and secret
* */
static String TWITTER_CONSUMER_KEY = "<my key>";
static String TWITTER_CONSUMER_SECRET = "<my secure key>";
// Preference Constants
static String PREFERENCE_NAME = "twitter_oauth";
static final String PREF_KEY_OAUTH_TOKEN = "oauth_token";
static final String PREF_KEY_OAUTH_SECRET = "oauth_token_secret";
static final String PREF_KEY_TWITTER_LOGIN = "isTwitterLogedIn";
static final String TWITTER_CALLBACK_URL = "oauth://t4jsample";
// Twitter oauth urls
static final String URL_TWITTER_AUTH = "https://api.twitter.com/oauth/authenticate";
static final String URL_TWITTER_OAUTH_VERIFIER = "oauth_verifier";
static final String URL_TWITTER_OAUTH_TOKEN = "oauth_token";
// Login button
Button btnLoginTwitter;
// Update status button
Button btnUpdateStatus;
// Logout button
Button btnLogoutTwitter;
// EditText for update
EditText txtUpdate;
// lbl update
TextView lblUpdate;
TextView lblUserName;
// Progress dialog
ProgressDialog pDialog;
// Twitter
private static Twitter twitter;
private static RequestToken requestToken;
// Shared Preferences
private static SharedPreferences mSharedPreferences;
// Internet Connection detector
private ConnectionDetector cd;
// Alert Dialog Manager
AlertDialogManager alert = new AlertDialogManager();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
cd = new ConnectionDetector(getApplicationContext());
// Check if Internet present
if (!cd.isConnectingToInternet()) {
// Internet Connection is not present
alert.showAlertDialog(MainActivity.this,
"Internet Connection Error",
"Please connect to working Internet connection", false);
// stop executing code by return
return;
}
// Check if twitter keys are set
if (TWITTER_CONSUMER_KEY.trim().length() == 0
|| TWITTER_CONSUMER_SECRET.trim().length() == 0) {
// Internet Connection is not present
alert.showAlertDialog(MainActivity.this, "Twitter oAuth tokens",
"Please set your twitter oauth tokens first!", false);
// stop executing code by return
return;
}
// All UI elements
btnLoginTwitter = (Button) findViewById(R.id.btnLoginTwitter);
btnUpdateStatus = (Button) findViewById(R.id.btnUpdateStatus);
btnLogoutTwitter = (Button) findViewById(R.id.btnLogoutTwitter);
txtUpdate = (EditText) findViewById(R.id.txtUpdateStatus);
lblUpdate = (TextView) findViewById(R.id.lblUpdate);
lblUserName = (TextView) findViewById(R.id.lblUserName);
// Shared Preferences
mSharedPreferences = getApplicationContext().getSharedPreferences(
"MyPref", 0);
/**
* Twitter login button click event will call loginToTwitter() function
* */
btnLoginTwitter.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// Call login twitter function
loginToTwitter();
}
});
/**
* This if conditions is tested once is redirected from twitter page.
* Parse the uri to get oAuth Verifier
* */
if (!isTwitterLoggedInAlready()) {
Uri uri = getIntent().getData();
if (uri != null && uri.toString().startsWith(TWITTER_CALLBACK_URL)) {
// oAuth verifier
String verifier = uri
.getQueryParameter(URL_TWITTER_OAUTH_VERIFIER);
try {
Log.e("Twitter Login ... >", 0+"");
// Get the access token
AccessToken accessToken = twitter.getOAuthAccessToken(
requestToken, verifier);
Log.e("Twitter Login ... >", 1+"");
// Shared Preferences
Editor e = mSharedPreferences.edit();
Log.e("Twitter Login ... >", 2+"");
// After getting access token, access token secret
// store them in application preferences
e.putString(PREF_KEY_OAUTH_TOKEN, accessToken.getToken());
e.putString(PREF_KEY_OAUTH_SECRET,
accessToken.getTokenSecret());
// Store login status - true
e.putBoolean(PREF_KEY_TWITTER_LOGIN, true);
e.commit(); // save changes
Log.e("Twitter OAuth Token", "> " + accessToken.getToken());
// Hide login button
btnLoginTwitter.setVisibility(View.GONE);
// Show Update Twitter
lblUpdate.setVisibility(View.VISIBLE);
txtUpdate.setVisibility(View.VISIBLE);
btnUpdateStatus.setVisibility(View.VISIBLE);
btnLogoutTwitter.setVisibility(View.VISIBLE);
// Getting user details from twitter
// For now i am getting his name only
long userID = accessToken.getUserId();
Log.e("Twitter Login ... >", 3+"");
User user = twitter.showUser(userID);
String username = user.getName();
Log.e("Twitter Login ... >", 4+"");
// Displaying in xml ui
lblUserName.setText(Html.fromHtml("<b>Welcome " + username
+ "</b>"));
} catch (Exception e) {
// Check log for login errors
Log.e("Twitter Login Error", "> " + e.getMessage());
}
}
}
}
/**
* Function to login twitter
* */
private void loginToTwitter() {
new myConnection().execute(1);
}
/**
* Check user already logged in your application using twitter Login flag is
* fetched from Shared Preferences
* */
private boolean isTwitterLoggedInAlready() {
// return twitter login status from Shared Preferences
return mSharedPreferences.getBoolean(PREF_KEY_TWITTER_LOGIN, false);
}
class myConnection extends AsyncTask<Integer, Integer, Integer> {
#Override
protected Integer doInBackground(Integer... params) {
// Check if already logged in
if (!isTwitterLoggedInAlready()) {
ConfigurationBuilder builder = new ConfigurationBuilder();
builder.setOAuthConsumerKey(TWITTER_CONSUMER_KEY);
builder.setOAuthConsumerSecret(TWITTER_CONSUMER_SECRET);
Configuration configuration = builder.build();
TwitterFactory factory = new TwitterFactory(configuration);
twitter = factory.getInstance();
try {
requestToken = twitter
.getOAuthRequestToken(TWITTER_CALLBACK_URL);
startActivity(new Intent(Intent.ACTION_VIEW,
Uri.parse(requestToken.getAuthenticationURL())));
} catch (TwitterException e) {
e.printStackTrace();
}
} else {
// user already logged into twitter
}
return 1;
}
}
}
The Log prints Twitter Login ... > 0 and then an exception happened , i catch and print this statment
Log.e("Twitter Login Error", "> " + e.getMessage());
the e.getMessage() is null
any help would be appreciated

Its all about the CallbackURL. You need to put some coding for handling the WebView. SO that after redirecting from the twitter.!! Check the code that i given below.!!
I set up Twitter user authentication as in the tutorial above such that the Activity doing the Twitter authentication has its content view changed to a WebView, the Activity is declared in the manifest file containing an intent-filter to catch the Twitter callback and, on callback, the response is processed and the Activity's content view is changed back to whatever it was.
I got it working but in doing so I found (what I think is) an easier way and such that the WebView doesn't ever kick off the phone's web browser app (thereby leaving your app, which you don't really want), as follows:
(1) Remove the Activity singleInstance and intent-filter declarations you added to the manifest file (in following the tutorial above). Don't need that anymore!
(2) Add a WebView to your Activity layout file and set its initial visibility to "gone" and its position, height, width etc however you want it. I set its properties so that it covers the whole screen when visible, as follows:
<WebView
android:id="#+id/myWebView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone" />
(3) Get a handle to your WebView in your Activity and set its WebViewClient to pick up the Twitter callback (and not to kick off the web browser app at any time), as follows...
myWebView = (WebView)findViewById(R.id.myWebView);
myWebView.setWebViewClient(new WebViewClient()
{
#Override
public boolean shouldOverrideUrlLoading(WebView webView, String url)
{
if (url != null
&& url.startsWith("myapptwittercallback:///myapp"))
handleTwitterCallback(url);
else
webView.loadUrl(url);
return true;
}
});
... Here you might also want to enable other settings of your WebView like saving form data and javascript execution (e.g. myWebView.getSettings().setJavaScriptEnabled(true);)
(4) Make your WebView visible and focused at the point you need to do Twitter authentication, as follows:
try
{
twitter = new TwitterFactory().getInstance();
twitter.setOAuthConsumer(
myTwitterConsumerKey,
myTwitterConsumerSecret);
twitterRequestToken = twitter.getOAuthRequestToken(
"myapptwittercallback:///myapp");
myWebView.loadUrl(
twitterRequestToken.getAuthenticationURL());
myWebView.setVisibility(View.VISIBLE);
myWebView.requestFocus(View.FOCUS_DOWN);
}
catch (TwitterException ex)
{
Toast.makeText(
this,
"Login failed. Please try again.",
Toast.LENGTH_SHORT).show();
}
... Remember to clear your WebView's history (i.e. myWebView.clearHistory() and set its visibility to "gone" in your handleTwitterCallback(String) method.
(5) Lastly, override your Activity's onBackPressed() method so that your WebView handles presses of the back button if its visible, as follows...
#Override
public void onBackPressed()
{
if (myWebView.getVisibility() == View.VISIBLE)
{
if (myWebView.canGoBack())
{
myWebView.goBack();
return;
}
else
{
myWebView.setVisibility(View.GONE);
return;
}
}
super.onBackPressed();
}
That's it! You should now have Twitter integration in your app and the user should never leave your app in doing Twitter authentication.