Android Open Source - spring-android-samples Twitter Web O Auth Activity

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2010-2014 the original author or authors.
 */*  ww w  . ja  v  a  2s  .c om*/
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.android.twitterclient;

import org.springframework.social.connect.Connection;
import org.springframework.social.connect.ConnectionRepository;
import org.springframework.social.connect.DuplicateConnectionException;
import org.springframework.social.oauth1.AuthorizedRequestToken;
import org.springframework.social.oauth1.OAuth1Parameters;
import org.springframework.social.oauth1.OAuthToken;
import org.springframework.social.twitter.api.Twitter;
import org.springframework.social.twitter.connect.TwitterConnectionFactory;

import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;

/**
 * @author Roy Clarkson
 */
public class TwitterWebOAuthActivity extends AbstractWebViewActivity {

  @SuppressWarnings("unused")
  private static final String TAG = TwitterWebOAuthActivity.class.getSimpleName();

  private static final String REQUEST_TOKEN_KEY = "request_token";

  private static final String REQUEST_TOKEN_SECRET_KEY = "request_token_secret";

  private ConnectionRepository connectionRepository;

  private TwitterConnectionFactory connectionFactory;

  private SharedPreferences twitterPreferences;

  // ***************************************
  // Activity methods
  // ***************************************
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.connectionRepository = getApplicationContext().getConnectionRepository();
    this.connectionFactory = getApplicationContext().getTwitterConnectionFactory();
    this.twitterPreferences = getSharedPreferences("TwitterConnectPreferences", Context.MODE_PRIVATE);
  }

  @Override
  public void onStart() {
    super.onStart();
    Uri uri = getIntent().getData();
    if (uri != null) {
      String oauthVerifier = uri.getQueryParameter("oauth_verifier");

      if (oauthVerifier != null) {
        getWebView().clearView();
        new TwitterPostConnectTask().execute(oauthVerifier);
      }
    } else {
      new TwitterPreConnectTask().execute();
    }
  }

  // ***************************************
  // Private methods
  // ***************************************
  private String getOAuthCallbackUrl() {
    return getString(R.string.twitter_oauth_callback_url);
  }

  private void displayTwitterAuthorization(OAuthToken requestToken) {
    // save for later use
    saveRequestToken(requestToken);

    // Generate the Twitter authorization URL to be used in the browser or web view
    String authUrl = this.connectionFactory.getOAuthOperations().buildAuthorizeUrl(requestToken.getValue(),
        OAuth1Parameters.NONE);

    // display the twitter authorization screen
    getWebView().loadUrl(authUrl);
  }

  private void displayTwitterOptions() {
    Intent intent = new Intent();
    intent.setClass(this, TwitterActivity.class);
    startActivity(intent);
    finish();
  }

  private void saveRequestToken(OAuthToken requestToken) {
    SharedPreferences.Editor editor = this.twitterPreferences.edit();
    editor.putString(REQUEST_TOKEN_KEY, requestToken.getValue());
    editor.putString(REQUEST_TOKEN_SECRET_KEY, requestToken.getSecret());
    editor.commit();
  }

  private OAuthToken retrieveRequestToken() {
    String token = this.twitterPreferences.getString(REQUEST_TOKEN_KEY, null);
    String secret = this.twitterPreferences.getString(REQUEST_TOKEN_SECRET_KEY, null);
    return new OAuthToken(token, secret);
  }

  private void deleteRequestToken() {
    this.twitterPreferences.edit().clear().commit();
  }

  // ***************************************
  // Private classes
  // ***************************************
  private class TwitterPreConnectTask extends AsyncTask<Void, Void, OAuthToken> {

    @Override
    protected void onPreExecute() {
      showProgressDialog("Initializing OAuth Connection...");
    }

    @Override
    protected OAuthToken doInBackground(Void... params) {
      // Fetch a one time use Request Token from Twitter
      return connectionFactory.getOAuthOperations().fetchRequestToken(getOAuthCallbackUrl(), null);
    }

    @Override
    protected void onPostExecute(OAuthToken requestToken) {
      dismissProgressDialog();
      displayTwitterAuthorization(requestToken);
    }

  }

  private class TwitterPostConnectTask extends AsyncTask<String, Void, Void> {

    @Override
    protected void onPreExecute() {
      showProgressDialog("Finalizing OAuth Connection...");
    }

    @Override
    protected Void doInBackground(String... params) {
      if (params.length <= 0) {
        return null;
      }

      final String verifier = params[0];

      OAuthToken requestToken = retrieveRequestToken();

      // Authorize the Request Token
      AuthorizedRequestToken authorizedRequestToken = new AuthorizedRequestToken(requestToken, verifier);

      // Exchange the Authorized Request Token for the Access Token
      OAuthToken accessToken = connectionFactory.getOAuthOperations().exchangeForAccessToken(
          authorizedRequestToken, null);

      deleteRequestToken();

      // Persist the connection and Access Token to the repository
      Connection<Twitter> connection = connectionFactory.createConnection(accessToken);

      try {
        connectionRepository.addConnection(connection);
      } catch (DuplicateConnectionException e) {
        // connection already exists in repository!
      }

      return null;
    }

    @Override
    protected void onPostExecute(Void v) {
      dismissProgressDialog();
      displayTwitterOptions();
    }

  }

}

Java Source Code List

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