Java tutorial
/***************************************************************************** * RecommendationsService.java ***************************************************************************** * Copyright 2014-2015 VLC authors, VideoLAN and VideoLabs * Author: Geoffrey Mtais * * 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 2 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, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ package org.videolan.vlc; import android.app.IntentService; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.os.Message; import android.support.v4.app.NotificationCompat; import org.videolan.vlc.media.MediaDatabase; import org.videolan.vlc.media.MediaLibrary; import org.videolan.medialibrary.media.MediaWrapper; import org.videolan.vlc.gui.video.VideoPlayerActivity; import org.videolan.vlc.gui.helpers.BitmapUtil; import org.videolan.vlc.util.Util; import org.videolan.vlc.util.WeakHandler; import java.util.ArrayList; import java.util.Collections; public class RecommendationsService extends IntentService { private static final String TAG = "VLC/RecommendationsService"; private static final int MAX_RECOMMENDATIONS = 3; private NotificationManager mNotificationManager; private MediaDatabase mMediaDatabase = MediaDatabase.getInstance(); private Context mContext; public RecommendationsService() { super("RecommendationsService"); } @Override public void onCreate() { super.onCreate(); mContext = this; if (mNotificationManager == null) { mNotificationManager = (NotificationManager) VLCApplication.getAppContext() .getSystemService(Context.NOTIFICATION_SERVICE); } } @Override protected void onHandleIntent(Intent intent) { if (intent != null && !doRecommendations()) { MediaLibrary.getInstance().addUpdateHandler(mHandler); MediaLibrary.getInstance().scanMediaItems(); } } private void buildRecommendation(MediaWrapper movie, int id, int priority) { if (movie == null) return; //TODO // if (mBackgroundUri != movie.getBackgroundUri()) { // extras.putString(EXTRA_BACKGROUND_IMAGE_URL, movie.getBackgroundUri()); // } // build the recommendation as a Notification object Notification notification = new NotificationCompat.BigPictureStyle(new NotificationCompat.Builder(mContext) .setContentTitle(movie.getTitle()).setContentText(movie.getDescription()) .setContentInfo(getString(R.string.app_name)).setPriority(priority).setLocalOnly(true) .setOngoing(true).setColor(mContext.getResources().getColor(R.color.orange800)) .setCategory("recommendation").setLargeIcon(BitmapUtil.getPicture(movie)) .setSmallIcon(R.drawable.icon).setContentIntent(buildPendingIntent(movie, id))).build(); // post the recommendation to the NotificationManager mNotificationManager.notify(id, notification); } private PendingIntent buildPendingIntent(MediaWrapper mediaWrapper, int id) { Intent intent = new Intent(mContext, VideoPlayerActivity.class); intent.setAction(VideoPlayerActivity.PLAY_FROM_VIDEOGRID); intent.putExtra(VideoPlayerActivity.PLAY_EXTRA_ITEM_LOCATION, mediaWrapper.getUri()); intent.putExtra(VideoPlayerActivity.PLAY_EXTRA_ITEM_TITLE, mediaWrapper.getTitle()); intent.putExtra(VideoPlayerActivity.PLAY_EXTRA_FROM_START, false); PendingIntent pi = PendingIntent.getActivity(this, id, intent, PendingIntent.FLAG_UPDATE_CURRENT); return pi; } RecommendationsHandler mHandler = new RecommendationsHandler(this); private class RecommendationsHandler extends WeakHandler<RecommendationsService> { public RecommendationsHandler(RecommendationsService owner) { super(owner); } @Override public void handleMessage(Message msg) { doRecommendations(); } } private boolean doRecommendations() { mNotificationManager.cancelAll(); int id = 0; ArrayList<MediaWrapper> videoList = MediaLibrary.getInstance().getVideoItems(); if (Util.isListEmpty(videoList)) return false; Bitmap pic; Collections.shuffle(videoList); for (MediaWrapper mediaWrapper : videoList) { pic = mMediaDatabase.getPicture(mediaWrapper.getUri()); if (pic != null && pic.getByteCount() > 4 && mediaWrapper.getTime() == 0) { buildRecommendation(mediaWrapper, ++id, Notification.PRIORITY_DEFAULT); } if (id == MAX_RECOMMENDATIONS) break; } return true; } }