Android Open Source - Tweety Update Service

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License

The source code is released under:

Apache License

Java Source Code

/* ========================================================================
 * Copyright 2010, Handy Codeworks LLC//from ww  w . ja va  2 s.c  o  m
 *
 * 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 com.handycodeworks.tweety;

import winterwell.jtwitter.Twitter;
import winterwell.jtwitter.TwitterException;
import winterwell.jtwitter.Twitter.Status;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.ContentValues;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.os.Handler;
import android.os.IBinder;
import android.preference.PreferenceManager;
import android.util.Log;
import android.widget.Toast;

public class UpdateService extends Service implements
    OnSharedPreferenceChangeListener {
  static final String TAG = "UpdateService";
  static final int NOTIFICATION_ID = 1334;
  static final String ACTION_NEW_TWEETS = "ACTION_NEW_TWEETS";

  // Instance variables
  Twitter mTwitter;
  Handler mHandler;
  Updater mUpdater;
  DatabaseOpenHelper mDBhelper;
  SQLiteDatabase mDb;
  SharedPreferences prefs;
  NotificationManager mNotificationManager;

  @Override
  public IBinder onBind(Intent arg0) {
    return null;
  }

  @Override
  public void onCreate() {
    super.onCreate();

    // Get shared preferences
    prefs = PreferenceManager.getDefaultSharedPreferences(this);
    prefs.registerOnSharedPreferenceChangeListener(this);

    // Init twitter connection
    mTwitter = getTwitter();

    // Handler for threads
    mHandler = new Handler();

    // Initialize database
    mDBhelper = new DatabaseOpenHelper(this);
    mDb = mDBhelper.getWritableDatabase();

    // Notification manager
    mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
  }

  private Twitter getTwitter() {
    if (mTwitter == null) {
      String username = prefs.getString("username", null);
      String password = prefs.getString("password", null);

      if (username != null && password != null) {
        mTwitter = new Twitter(username, password);
        mTwitter.setSource(TAG);
      }
    }
    return mTwitter;
  }

  @Override
  public void onStart(Intent intent, int startId) {
    super.onStart(intent, startId);
    mUpdater = new Updater();
    mHandler.post(mUpdater);
  }

  @Override
  public void onDestroy() {
    super.onDestroy();
    mHandler.removeCallbacks(mUpdater);
    mDb.close();
    Log.d(TAG, "Destroying service");
  }

  class Updater implements Runnable {
    private static final String TAG = "Updater";
    private static final long DELAY = 60000L; // 60s

    public void run() {
      boolean hasNewTweets = false;

      try {
        for (Status s : getTwitter().getFriendsTimeline()) {
          Log.d(TAG, "Got status: " + s);
          ContentValues v = DatabaseOpenHelper
              .statusToContentValues(s);
          try {
            // Insert will throw exceptions for duplicate IDs
            mDb.insertOrThrow(DatabaseOpenHelper.TABLE, null, v);
            hasNewTweets = true; // Only runs if no exception form
                        // insert
          } catch (SQLException e) {
          }
        }
      } catch (NullPointerException npe){
        Log.e(TAG,"Null Twitter object, check username and password are set");
      } catch (TwitterException.RateLimit ter) {
        Toast.makeText(UpdateService.this,
            "Rate limited (Too much Twitter!", Toast.LENGTH_SHORT)
            .show();
      } catch (TwitterException.Timeout tet) {
        Log
            .e(TAG,
                "Unable to connect to Twitter: Connection timed out");
      } catch (TwitterException te) {
        Log.e(TAG, "Unknown Twitter Exception");
      }

      // Broadcast and send notification if new tweets are available
      if (hasNewTweets) {
        sendBroadcast(new Intent(ACTION_NEW_TWEETS));
        Log.d(TAG, "sending " + ACTION_NEW_TWEETS + " broadcast...");
        hasNewTweets = false;

        // Create notification
        Notification newTweetsNotification = new Notification(
            R.drawable.twitter_bird_status, "New tweets!", System
                .currentTimeMillis());
        Intent showTimeline = new Intent(UpdateService.this,
            Timeline.class);
        PendingIntent pi = PendingIntent.getActivity(
            UpdateService.this, 0, showTimeline, 0);
        newTweetsNotification.setLatestEventInfo(UpdateService.this,
            "New Tweets!", "There are new tweets!", pi);

        if (prefs.getBoolean("tweets_vibrate", true)) {
          newTweetsNotification.defaults |= Notification.DEFAULT_VIBRATE;
        }
        newTweetsNotification.defaults |= Notification.DEFAULT_LIGHTS;
        mNotificationManager.notify(NOTIFICATION_ID,
            newTweetsNotification);
      }

      // Run again in DELAY seconds
      mHandler.postDelayed(this, DELAY);
    }

  }

  public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
      String key) {
    mTwitter = null;
  }

}

Java Source Code List

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