Android Open Source - ShowMeTweets Sign In With Twitter

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From Project

Back to project page ShowMeTweets.

License

The source code is released under:

MIT License

Java Source Code

package com.fcduarte.showmetweets.activities;
/* w ww  . j  a va2 s. c om*/
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.auth.AccessToken;
import twitter4j.auth.RequestToken;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;

import com.fcduarte.showmetweets.R;
import com.fcduarte.showmetweets.dao.TweetDAO;
import com.fcduarte.showmetweets.dao.UserDAO;
import com.fcduarte.showmetweets.model.User;
import com.fcduarte.showmetweets.utils.ConnectivityUtils;
import com.fcduarte.showmetweets.utils.TwitterUtils;

public class SignInWithTwitter extends Activity {

  protected static final String TWITTER_CALLBACK_URL = "oauth://showmetweets";
  private static final String URL_TWITTER_OAUTH_VERIFIER = "oauth_verifier";
  
  private ImageButton mSignInTwitterButton;
  private Twitter mTwitter;
  private TwitterUtils mTwitterUtils;
  private UserDAO mUserDAO;
  private TweetDAO mTweetDAO;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_sign_in_with_twitter);
    this.getActionBar().hide();

    mSignInTwitterButton = (ImageButton) findViewById(R.id.btn_sign_in);
    mSignInTwitterButton.setOnClickListener(mSignButtonListener);

    mUserDAO = new UserDAO();
    mTweetDAO = new TweetDAO();
    
    mTwitterUtils = new TwitterUtils(this);
    mTwitter = mTwitterUtils.getTwitterClient();
    
    if (mTwitterUtils.loadAccessToken() != null) {
      new SynchronizeUserAsyncTask().execute();
      return;
    }
    
    processTwitterCallback(getIntent().getData());
  }

  private void goToMainScreen() {
    Intent intent = new Intent(this, HomeActivity.class);
    startActivity(intent);
  }

  private void processTwitterCallback(Uri data) {
    if (data == null || !data.toString().startsWith(TWITTER_CALLBACK_URL)) {
      return;
    }
    
        final String verifier = data.getQueryParameter(URL_TWITTER_OAUTH_VERIFIER);
        
        if (verifier == null) {
          return;
        }
        
        Thread thread = new Thread(new Runnable() {
      
      @Override
      public void run() {
        try {
          AccessToken accessToken = mTwitter.getOAuthAccessToken(mTwitterUtils.loadRequestToken(), verifier);
          mTwitterUtils.saveAccessToken(accessToken.getToken(), accessToken.getTokenSecret());
          new SynchronizeUserAsyncTask().execute();
        } catch (TwitterException e) {
          Log.e("SignInWithTwitter", "Error", e);
          mTwitterUtils.clear();
        }        
      }
    });
        thread.start();
  }

  private OnClickListener mSignButtonListener = new OnClickListener() {
    @Override
    public void onClick(View view) {
      Thread thread = new Thread(new Runnable() {

        @Override
        public void run() {
          try {
            RequestToken requestToken = mTwitter.getOAuthRequestToken(TWITTER_CALLBACK_URL);
            mTwitterUtils.saveRequestToken(requestToken.getToken(), requestToken.getTokenSecret());
            
            Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(requestToken.getAuthenticationURL()));
            intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
            
            SignInWithTwitter.this.startActivity(intent);
          } catch (TwitterException e) {
            Log.e("SignIn", "Error requestToken", e);
            mTwitterUtils.clear();
          }
        }
      });

      thread.start();
    }
  };
  
  private class SynchronizeUserAsyncTask extends AsyncTask<Integer, Void, Boolean> {
    
    @Override
    protected void onPostExecute(Boolean result) {
      super.onPostExecute(result);
  
      if (result) {
        goToMainScreen();
      }
    }

    @Override
    protected Boolean doInBackground(Integer... params) {
      twitter4j.User remoteUser = getRemoteUser();
      User localUser = null;
      
      if (remoteUser == null) {
        localUser = mUserDAO.findByUsername(mTwitterUtils.loadLoggedUser());
        
        if (localUser == null) {
          return false;
        }
      } else {
        localUser = mUserDAO.findByUsername(remoteUser.getScreenName());
      }
      
      if (remoteUser != null && localUser == null) {
        User user = new User();
        user.buildFromRemote(remoteUser);
        user.save();
        
        localUser = user;

      }
      
      if (mTwitterUtils.userChanged(localUser)) {
        mTweetDAO.deleteAll();
        mTwitterUtils.saveLoggedUser(localUser);
      }
      
      return true;
    }

    private twitter4j.User getRemoteUser() {
      if (!ConnectivityUtils.isConnected(SignInWithTwitter.this)) {
        return null;
      }
      
          try {
        long id = mTwitter.getId();
        return mTwitter.showUser(id);
      } catch (IllegalStateException e) {
        return null;
      } catch (TwitterException e) {
        Log.e("TwitterClient", "getRemoteUser()", e);
        
        if (!e.isCausedByNetworkIssue()) {
          mTwitterUtils.clear();
        }
        
        return null;
      }
    }
    
  }


}

Java Source Code List

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