/RockLock/src/com/marvin/rocklock/MusicPlayer.java
Java | 303 lines | 241 code | 39 blank | 23 comment | 75 complexity | a5f92a8d43af039fda0e2a7936c7d01c MD5 | raw file
1/* 2 * Copyright (C) 2010 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not 5 * use this file except in compliance with the License. You may obtain a copy of 6 * the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 13 * License for the specific language governing permissions and limitations under 14 * the License. 15 */ 16 17package com.marvin.rocklock; 18 19import android.content.Context; 20import android.content.SharedPreferences; 21import android.content.SharedPreferences.Editor; 22import android.media.MediaPlayer; 23import android.media.MediaPlayer.OnCompletionListener; 24import android.net.Uri; 25import android.preference.PreferenceManager; 26 27/** 28 * Music player abstraction that takes care of using the MediaPlayer and the 29 * SongPickers. 30 * 31 * @author clchen@google.com (Charles L. Chen) 32 */ 33public class MusicPlayer { 34 private static final String PREF_PLAYLIST = "LAST_PLAYLIST"; 35 36 public static final int ROCKLOCK_PLAYLIST = 0; 37 38 public static final int TAGGED_PLAYLIST = 1; 39 40 private MediaPlayer player; 41 42 private SongPicker picker; 43 44 private DirectoryStructuredSongPicker dPicker; 45 46 private boolean dPickerAvailable; 47 48 private TagStructuredSongPicker tPicker; 49 50 boolean tPickerAvailable; 51 52 private int songPickerType; 53 54 private RockLockActivity parent; 55 56 private Editor editor; 57 58 public MusicPlayer(Context ctx) { 59 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ctx); 60 editor = prefs.edit(); 61 62 parent = (RockLockActivity) ctx; 63 dPicker = new DirectoryStructuredSongPicker(parent); 64 tPicker = new TagStructuredSongPicker(parent); 65 66 if (prefs.getInt(PREF_PLAYLIST, ROCKLOCK_PLAYLIST) == ROCKLOCK_PLAYLIST) { 67 picker = dPicker; 68 songPickerType = ROCKLOCK_PLAYLIST; 69 } else { 70 picker = tPicker; 71 songPickerType = TAGGED_PLAYLIST; 72 } 73 74 dPickerAvailable = true; 75 tPickerAvailable = true; 76 if (dPicker.peekNextAlbum().length() < 1) { 77 dPickerAvailable = false; 78 } 79 if (tPicker.peekNextAlbum().length() < 1) { 80 tPickerAvailable = false; 81 } 82 if (tPickerAvailable && !dPickerAvailable) { 83 picker = tPicker; 84 songPickerType = TAGGED_PLAYLIST; 85 editor.putInt(PREF_PLAYLIST, TAGGED_PLAYLIST); 86 editor.commit(); 87 } else if (!tPickerAvailable && dPickerAvailable) { 88 picker = dPicker; 89 songPickerType = TAGGED_PLAYLIST; 90 editor.putInt(PREF_PLAYLIST, TAGGED_PLAYLIST); 91 editor.commit(); 92 } 93 } 94 95 public int getSongPickerType(){ 96 return songPickerType; 97 } 98 99 public int cycleSongPicker() { 100 if (!tPickerAvailable && !dPickerAvailable) { 101 return -1; 102 } 103 if (songPickerType == ROCKLOCK_PLAYLIST) { 104 picker = tPicker; 105 songPickerType = TAGGED_PLAYLIST; 106 } else { 107 picker = dPicker; 108 songPickerType = ROCKLOCK_PLAYLIST; 109 } 110 if (tPickerAvailable && !dPickerAvailable) { 111 picker = tPicker; 112 songPickerType = TAGGED_PLAYLIST; 113 } else if (!tPickerAvailable && dPickerAvailable) { 114 picker = dPicker; 115 songPickerType = ROCKLOCK_PLAYLIST; 116 } 117 editor.putInt(PREF_PLAYLIST, songPickerType); 118 editor.commit(); 119 return songPickerType; 120 } 121 122 public void togglePlayPause() { 123 if (!tPickerAvailable && !dPickerAvailable) { 124 return; 125 } 126 if (player != null) { 127 if (player.isPlaying()) { 128 player.pause(); 129 } else { 130 player.start(); 131 } 132 } else { 133 play(picker.getCurrentSongFile()); 134 } 135 } 136 137 public boolean isPlaying() { 138 if (!tPickerAvailable && !dPickerAvailable) { 139 return false; 140 } 141 if (player != null) { 142 return player.isPlaying(); 143 } 144 return false; 145 } 146 147 public synchronized void stop() { 148 if (!tPickerAvailable && !dPickerAvailable) { 149 return; 150 } 151 if (player != null) { 152 player.release(); 153 player = null; 154 } 155 } 156 157 public void seekForward() { 158 if (!tPickerAvailable && !dPickerAvailable) { 159 return; 160 } 161 if (player != null) { 162 try { 163 player.seekTo(player.getCurrentPosition() + 3000); 164 } catch (IllegalStateException e) { 165 // Unable to seek, so just do nothing. 166 } 167 } 168 } 169 170 public void seekBackward() { 171 if (!tPickerAvailable && !dPickerAvailable) { 172 return; 173 } 174 if (player != null) { 175 try { 176 player.seekTo(player.getCurrentPosition() - 3000); 177 } catch (IllegalStateException e) { 178 // Unable to seek, so just do nothing. 179 } 180 } 181 } 182 183 public void nextTrack() { 184 if (!tPickerAvailable && !dPickerAvailable) { 185 return; 186 } 187 picker.goNextTrack(); 188 play(picker.getCurrentSongFile()); 189 } 190 191 public void prevTrack() { 192 if (!tPickerAvailable && !dPickerAvailable) { 193 return; 194 } 195 picker.goPrevTrack(); 196 play(picker.getCurrentSongFile()); 197 } 198 199 public void nextAlbum() { 200 if (!tPickerAvailable && !dPickerAvailable) { 201 return; 202 } 203 picker.goNextAlbum(); 204 play(picker.getCurrentSongFile()); 205 } 206 207 public void prevAlbum() { 208 if (!tPickerAvailable && !dPickerAvailable) { 209 return; 210 } 211 picker.goPrevAlbum(); 212 play(picker.getCurrentSongFile()); 213 } 214 215 public void nextArtist() { 216 if (!tPickerAvailable && !dPickerAvailable) { 217 return; 218 } 219 picker.goNextArtist(); 220 play(picker.getCurrentSongFile()); 221 } 222 223 public void prevArtist() { 224 if (!tPickerAvailable && !dPickerAvailable) { 225 return; 226 } 227 picker.goPrevArtist(); 228 play(picker.getCurrentSongFile()); 229 } 230 231 private synchronized void play(String filename) { 232 if (!tPickerAvailable && !dPickerAvailable) { 233 return; 234 } 235 try { 236 if (player != null) { 237 player.release(); 238 } 239 player = MediaPlayer.create(parent, Uri.parse(filename)); 240 if (player == null) { 241 return; 242 } 243 player.setOnCompletionListener(new OnCompletionListener() { 244 public void onCompletion(MediaPlayer mp) { 245 nextTrack(); 246 parent.updateDisplayText(null, null, false); 247 } 248 }); 249 player.start(); 250 } catch (IllegalStateException e) { 251 e.printStackTrace(); 252 } 253 } 254 255 public String getNextArtistName() { 256 if (!tPickerAvailable && !dPickerAvailable) { 257 return ""; 258 } 259 return picker.peekNextArtist(); 260 } 261 262 public String getPrevArtistName() { 263 if (!tPickerAvailable && !dPickerAvailable) { 264 return ""; 265 } 266 return picker.peekPrevArtist(); 267 } 268 269 public String getNextAlbumName() { 270 if (!tPickerAvailable && !dPickerAvailable) { 271 return ""; 272 } 273 return picker.peekNextAlbum(); 274 } 275 276 public String getPrevAlbumName() { 277 if (!tPickerAvailable && !dPickerAvailable) { 278 return ""; 279 } 280 return picker.peekPrevAlbum(); 281 } 282 283 public String getNextTrackName() { 284 if (!tPickerAvailable && !dPickerAvailable) { 285 return ""; 286 } 287 return picker.peekNextTrack(); 288 } 289 290 public String getPrevTrackName() { 291 if (!tPickerAvailable && !dPickerAvailable) { 292 return ""; 293 } 294 return picker.peekPrevTrack(); 295 } 296 297 public String getCurrentSongInfo() { 298 if (!tPickerAvailable && !dPickerAvailable) { 299 return ""; 300 } 301 return picker.getCurrentSongInfo(); 302 } 303}