Java tutorial
/** * AirProbe * Air quality application for Android, developed as part of * EveryAware project (<http://www.everyaware.eu>). * * Copyright (C) 2014 CSP Innovazione nelle ICT. All rights reserved. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * For any inquiry please write to <devel@csp.it> * * CONTRIBUTORS * * This program was made with the contribution of: * Fabio Saracino <fabio.saracino@csp.it> * Patrick Facco <patrick.facco@csp.it> * * * SOURCE CODE * * The source code of this program is available at * <https://github.com/CSPICT/airprobe> */ package org.csp.everyaware.internet; import java.text.SimpleDateFormat; import java.util.Date; import org.csp.everyaware.Constants; import org.csp.everyaware.R; import org.csp.everyaware.db.AnnotatedRecord; import org.csp.everyaware.db.Record; import org.csp.everyaware.facebooksdk.Facebook; import org.csp.everyaware.tabactivities.Map; import twitter4j.Twitter; import twitter4j.TwitterException; import twitter4j.TwitterFactory; import twitter4j.auth.AccessToken; import twitter4j.auth.RequestToken; import twitter4j.conf.Configuration; import twitter4j.conf.ConfigurationBuilder; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.content.SharedPreferences.Editor; import android.os.AsyncTask; import android.os.Handler; import android.util.Log; import android.webkit.WebView; import android.widget.Toast; /* DATA OBTAINED DURING APP REGISTRATION ON TWITTER * Consumer key OOvAO63hbxDRnc9wiG5w Consumer secret dNFbQk6HaMAAON36Mg6tKn4RufsehZbj4OuhozyswY Request token URL https://api.twitter.com/oauth/request_token Authorize URL https://api.twitter.com/oauth/authorize Access token URL https://api.twitter.com/oauth/access_token Callback URL http://www.everyaware.eu/ Access token 552769274-ljMnrJFjpiD5Pygvh7pFJU06WQUPNEo2UkMoBgHQ Access token secret fiGzcndltiOFUEpm1CU4Ox24bz3jk1iW3ojaPDgP3Sw Access level Read and write */ public class TwitterManager { private static TwitterManager mTwMan; private Activity mActivity; private Twitter mTwitter; //tokens private RequestToken mRequestToken; public static TwitterManager getInstance(Activity activity) { if (mTwMan == null) mTwMan = new TwitterManager(activity); return mTwMan; } private TwitterManager(Activity activity) { mActivity = activity; } //call this only if internet connection is available public void initTwitter() { ConfigurationBuilder confbuilder = new ConfigurationBuilder(); Configuration conf = confbuilder.setOAuthConsumerKey(Constants.CONSUMER_KEY) .setOAuthConsumerSecret(Constants.CONSUMER_SECRET).build(); mTwitter = new TwitterFactory(conf).getInstance(); mTwitter.setOAuthAccessToken(null); //try //{ new OuthRequestTokenTask().execute(Constants.CALLBACK_URL); /* mRequestToken = mTwitter.getOAuthRequestToken(Constants.CALLBACK_URL); Intent intent = new Intent(mActivity, TwitterLogin.class); intent.putExtra(Constants.IEXTRA_AUTH_URL, mRequestToken.getAuthorizationURL()); mActivity.startActivityForResult(intent, 0);*/ /* } catch (TwitterException e) { e.printStackTrace(); }*/ } public boolean authoriseNewUser(String oauthVerifier) { AccessToken accessToken = null; try { accessToken = mTwitter.getOAuthAccessToken(mRequestToken, oauthVerifier); SharedPreferences pref = mActivity.getSharedPreferences(Constants.PREF_NAME, Activity.MODE_PRIVATE); SharedPreferences.Editor editor = pref.edit(); editor.putString(Constants.PREF_KEY_ACCESS_TOKEN, accessToken.getToken()); editor.putString(Constants.PREF_KEY_ACCESS_TOKEN_SECRET, accessToken.getTokenSecret()); editor.commit(); Toast.makeText(mActivity, "authorized", Toast.LENGTH_SHORT).show(); return true; } catch (TwitterException e) { e.printStackTrace(); return false; } } public void shutdown() { SharedPreferences pref = mActivity.getSharedPreferences(Constants.PREF_NAME, Activity.MODE_PRIVATE); SharedPreferences.Editor editor = pref.edit(); editor.remove(Constants.PREF_KEY_ACCESS_TOKEN); editor.remove(Constants.PREF_KEY_ACCESS_TOKEN_SECRET); editor.commit(); if (mTwitter != null) { mTwitter.shutdown(); } } public void postMessage(Record annotatedRecord) { SharedPreferences pref = mActivity.getApplicationContext().getSharedPreferences(Constants.PREF_NAME, mActivity.getApplicationContext().MODE_PRIVATE); String accessToken = pref.getString(Constants.PREF_KEY_ACCESS_TOKEN, null); String accessTokenSecret = pref.getString(Constants.PREF_KEY_ACCESS_TOKEN_SECRET, null); if (accessToken == null || accessTokenSecret == null) { Toast.makeText(mActivity.getApplicationContext(), "not authorize yet", Toast.LENGTH_SHORT).show(); return; } mTwitter.setOAuthAccessToken(new AccessToken(accessToken, accessTokenSecret)); String status = composeMessage(annotatedRecord); //do twitter update status in async task new PostMessageTask().execute(status); } //compose string message that will be posted on wall private String composeMessage(Record record) { String message; String avgPoll = ""; try { avgPoll = String.valueOf(record.calcAvgPoll()); } catch (Exception e) { } if (avgPoll.length() - 1 - avgPoll.lastIndexOf(".") > 2) ; avgPoll = avgPoll.substring(0, avgPoll.lastIndexOf(".") + 4); //add user annotation to msg message = "\"" + record.mUserData1 + "\"\n"; //average pollution message += "AQI: " + record.calcAvgPoll() + "\n"; //add gps coordinates to msg if (record.mValues[0] != 0) message += "Lat " + record.mValues[0] + ", Lon " + record.mValues[1] + "\n"; //format timestamp into date and add to msg String dateString = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss").format(new Date(record.mSysTimestamp)); message += "Time: " + dateString + "\n"; message += "Sent with AirProbe - http://www.everyaware.eu/\n"; if (message.length() > 140) message = message.substring(0, 140); return message; } private class PostMessageTask extends AsyncTask<String, Integer, Integer> { @Override protected void onPostExecute(Integer result) { if (result == 1) Toast.makeText(mActivity.getApplicationContext(), "Twitter status updated", Toast.LENGTH_LONG) .show(); } @Override protected Integer doInBackground(String... params) { try { mTwitter.updateStatus(params[0]); } catch (TwitterException e) { e.printStackTrace(); } return 1; } } private class OuthRequestTokenTask extends AsyncTask<String, Void, Void> { @Override protected Void doInBackground(String... url) { try { mRequestToken = mTwitter.getOAuthRequestToken(Constants.CALLBACK_URL); } catch (TwitterException e) { e.printStackTrace(); } return null; } @Override protected void onPostExecute(Void result) { Intent intent = new Intent(mActivity, TwitterLogin.class); intent.putExtra(Constants.IEXTRA_AUTH_URL, mRequestToken.getAuthorizationURL()); mActivity.startActivityForResult(intent, 0); } } }