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/*

 * A very simple example to demonstrate how Twitter4J can be used to make the users

 * sign-in with Twitter.

 * Whenever it is started, control goes to twitter.com for authentication.

 * if app is already authenticated, control comes back in your application.

 * And finally it displays the first tweet of the timeline.

 *

 *

 */

 

 

 

package com.T4J_OAuth.activities;

 

import java.util.List;

 

import twitter4j.Status;

import twitter4j.Twitter;

import twitter4j.TwitterException;

import twitter4j.TwitterFactory;

import twitter4j.http.AccessToken;

import twitter4j.http.RequestToken;

import android.app.Activity;

import android.content.Intent;

import android.net.Uri;

import android.os.Bundle;

import android.util.Log;

import android.widget.Toast;

 

public class Main extends Activity {

        /** Called when the activity is first created. */

 

        Twitter twitter;

        RequestToken requestToken;

//Please put the values of consumerKy and consumerSecret of your app

        public final static String consumerKey = "YOUR_CONSUMER_KEY"; // "your key here";

        public final static String consumerSecret = "YOUR_CONSUMER_SECRET"; // "your secret key here";

        private final String CALLBACKURL = "T4JOAuth://main";  //Callback URL that tells the WebView to load this activity when it finishes with twitter.com. (see manifest)

 

 

        /*

         * Calls the OAuth login method as soon as its started

         */

        @Override

        public void onCreate(Bundle savedInstanceState) {

                super.onCreate(savedInstanceState);

                setContentView(R.layout.main);

                OAuthLogin();

        }

 

        /*

         * - Creates object of Twitter and sets consumerKey and consumerSecret

         * - Prepares the URL accordingly and opens the WebView for the user to provide sign-in details

         * - When user finishes signing-in, WebView opens your activity back

         */

        void OAuthLogin() {

                try {

                        twitter = new TwitterFactory().getInstance();

                        twitter.setOAuthConsumer(consumerKey, consumerSecret);

                        requestToken = twitter.getOAuthRequestToken(CALLBACKURL);

                        String authUrl = requestToken.getAuthenticationURL();

                        this.startActivity(new Intent(Intent.ACTION_VIEW, Uri

                                        .parse(authUrl)));

                } catch (TwitterException ex) {

                        Toast.makeText(this, ex.getMessage(), Toast.LENGTH_LONG).show();

                        Log.e("in Main.OAuthLogin", ex.getMessage());

                }

        }

 

       

        /*

         * - Called when WebView calls your activity back.(This happens when the user has finished signing in)

         * - Extracts the verifier from the URI received

         * - Extracts the token and secret from the URL

         */

        @Override

        protected void onNewIntent(Intent intent) {

                super.onNewIntent(intent);

                Uri uri = intent.getData();

                try {

                        String verifier = uri.getQueryParameter("oauth_verifier");

                        AccessToken accessToken = twitter.getOAuthAccessToken(requestToken,

                                        verifier);

                        String token = accessToken.getToken(), secret = accessToken

                                        .getTokenSecret();

                        displayTimeLine(token, secret); //after everything, display the first tweet

 

                } catch (TwitterException ex) {

                        Log.e("Main.onNewIntent", "" + ex.getMessage());

                }

 

        }

       

        /*

         * Displays the timeline's first tweet in a Toast

         */

 

        @SuppressWarnings("deprecation")

        void displayTimeLine(String token, String secret) {

                if (null != token && null != secret) {

                        List<Status> statuses = null;

                        try {

                                twitter.setOAuthAccessToken(token, secret);

                                statuses = twitter.getFriendsTimeline();

                                Toast.makeText(this, statuses.get(0).getText(), Toast.LENGTH_LONG)

                                        .show();

                        } catch (Exception ex) {

                                Toast.makeText(this, "Error:" + ex.getMessage(),

                                                Toast.LENGTH_LONG).show();

                                Log.d("Main.displayTimeline",""+ex.getMessage());

                        }

                       

                } else {

                        Toast.makeText(this, "Not Verified", Toast.LENGTH_LONG).show();

                }

        }

}