MediaSessionCompat.java revision e48441650b24efca174b0b8b29c6f284f8d01650
1 2/* 3 * Copyright (C) 2014 The Android Open Source Project 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18package android.support.v4.media.session; 19 20import android.app.Activity; 21import android.app.PendingIntent; 22import android.content.BroadcastReceiver; 23import android.content.ComponentName; 24import android.content.Context; 25import android.content.Intent; 26import android.graphics.Bitmap; 27import android.media.AudioManager; 28import android.net.Uri; 29import android.os.Build; 30import android.os.Bundle; 31import android.os.Handler; 32import android.os.IBinder; 33import android.os.Looper; 34import android.os.Message; 35import android.os.Parcel; 36import android.os.Parcelable; 37import android.os.RemoteCallbackList; 38import android.os.RemoteException; 39import android.os.ResultReceiver; 40import android.os.SystemClock; 41import android.support.annotation.IntDef; 42import android.support.v4.media.MediaDescriptionCompat; 43import android.support.v4.media.MediaMetadataCompat; 44import android.support.v4.media.RatingCompat; 45import android.support.v4.media.VolumeProviderCompat; 46import android.text.TextUtils; 47import android.util.Log; 48import android.util.TypedValue; 49import android.view.KeyEvent; 50 51import java.lang.annotation.Retention; 52import java.lang.annotation.RetentionPolicy; 53import java.util.ArrayList; 54import java.util.List; 55 56/** 57 * Allows interaction with media controllers, volume keys, media buttons, and 58 * transport controls. 59 * <p> 60 * A MediaSession should be created when an app wants to publish media playback 61 * information or handle media keys. In general an app only needs one session 62 * for all playback, though multiple sessions can be created to provide finer 63 * grain controls of media. 64 * <p> 65 * Once a session is created the owner of the session may pass its 66 * {@link #getSessionToken() session token} to other processes to allow them to 67 * create a {@link MediaControllerCompat} to interact with the session. 68 * <p> 69 * To receive commands, media keys, and other events a {@link Callback} must be 70 * set with {@link #setCallback(Callback)}. 71 * <p> 72 * When an app is finished performing playback it must call {@link #release()} 73 * to clean up the session and notify any controllers. 74 * <p> 75 * MediaSessionCompat objects are not thread safe and all calls should be made 76 * from the same thread. 77 * <p> 78 * This is a helper for accessing features in 79 * {@link android.media.session.MediaSession} introduced after API level 4 in a 80 * backwards compatible fashion. 81 */ 82public class MediaSessionCompat { 83 private static final String TAG = "MediaSessionCompat"; 84 85 private final MediaSessionImpl mImpl; 86 private final MediaControllerCompat mController; 87 private final ArrayList<OnActiveChangeListener> mActiveListeners = new ArrayList<>(); 88 89 /** 90 * @hide 91 */ 92 @IntDef(flag=true, value={FLAG_HANDLES_MEDIA_BUTTONS, FLAG_HANDLES_TRANSPORT_CONTROLS}) 93 @Retention(RetentionPolicy.SOURCE) 94 public @interface SessionFlags {} 95 96 /** 97 * Set this flag on the session to indicate that it can handle media button 98 * events. 99 */ 100 public static final int FLAG_HANDLES_MEDIA_BUTTONS = 1 << 0; 101 102 /** 103 * Set this flag on the session to indicate that it handles transport 104 * control commands through its {@link Callback}. 105 */ 106 public static final int FLAG_HANDLES_TRANSPORT_CONTROLS = 1 << 1; 107 108 /** 109 * Custom action to invoke playFromUri() for the forward compatibility. 110 */ 111 static final String ACTION_PLAY_FROM_URI = 112 "android.support.v4.media.session.action.PLAY_FROM_URI"; 113 114 /** 115 * Custom action to invoke prepare() for the forward compatibility. 116 */ 117 static final String ACTION_PREPARE = "android.support.v4.media.session.action.PREPARE"; 118 119 /** 120 * Custom action to invoke prepareFromMediaId() for the forward compatibility. 121 */ 122 static final String ACTION_PREPARE_FROM_MEDIA_ID = 123 "android.support.v4.media.session.action.PREPARE_FROM_MEDIA_ID"; 124 125 /** 126 * Custom action to invoke prepareFromSearch() for the forward compatibility. 127 */ 128 static final String ACTION_PREPARE_FROM_SEARCH = 129 "android.support.v4.media.session.action.PREPARE_FROM_SEARCH"; 130 131 /** 132 * Custom action to invoke prepareFromUri() for the forward compatibility. 133 */ 134 static final String ACTION_PREPARE_FROM_URI = 135 "android.support.v4.media.session.action.PREPARE_FROM_URI"; 136 137 /** 138 * Argument for use with {@link #ACTION_PREPARE_FROM_MEDIA_ID} indicating media id to play. 139 */ 140 static final String ACTION_ARGUMENT_MEDIA_ID = 141 "android.support.v4.media.session.action.ARGUMENT_MEDIA_ID"; 142 143 /** 144 * Argument for use with {@link #ACTION_PREPARE_FROM_SEARCH} indicating search query. 145 */ 146 static final String ACTION_ARGUMENT_QUERY = 147 "android.support.v4.media.session.action.ARGUMENT_QUERY"; 148 149 /** 150 * Argument for use with {@link #ACTION_PREPARE_FROM_URI} and {@link #ACTION_PLAY_FROM_URI} 151 * indicating URI to play. 152 */ 153 static final String ACTION_ARGUMENT_URI = 154 "android.support.v4.media.session.action.ARGUMENT_URI"; 155 156 /** 157 * Argument for use with various actions indicating extra bundle. 158 */ 159 static final String ACTION_ARGUMENT_EXTRAS = 160 "android.support.v4.media.session.action.ARGUMENT_EXTRAS"; 161 162 // Maximum size of the bitmap in dp. 163 private static final int MAX_BITMAP_SIZE_IN_DP = 320; 164 165 // Maximum size of the bitmap in px. It shouldn't be changed. 166 private static int sMaxBitmapSize; 167 168 /** 169 * Creates a new session. You must call {@link #release()} when finished with the session. 170 * <p> 171 * The session will automatically be registered with the system but will not be published 172 * until {@link #setActive(boolean) setActive(true)} is called. 173 * </p><p> 174 * For API 20 or earlier, note that a media button receiver is required for handling 175 * {@link Intent#ACTION_MEDIA_BUTTON}. This constructor will attempt to find an appropriate 176 * {@link BroadcastReceiver} from your manifest. See {@link MediaButtonReceiver} for more 177 * details. 178 * </p> 179 * @param context The context to use to create the session. 180 * @param tag A short name for debugging purposes. 181 */ 182 public MediaSessionCompat(Context context, String tag) { 183 this(context, tag, null, null); 184 } 185 186 /** 187 * Creates a new session with a specified media button receiver (a component name and/or 188 * a pending intent). You must call {@link #release()} when finished with the session. 189 * <p> 190 * The session will automatically be registered with the system but will not be published 191 * until {@link #setActive(boolean) setActive(true)} is called. Note that {@code mbrComponent} 192 * and {@code mrbIntent} are only used for API 20 or earlier. If you want to set a media button 193 * receiver in API 21 or later, call {@link #setMediaButtonReceiver}. 194 * </p><p> 195 * For API 20 or earlier, the new session will use the given {@code mbrComponent}. 196 * If null, this will attempt to find an appropriate {@link BroadcastReceiver} that handles 197 * {@link Intent#ACTION_MEDIA_BUTTON} from your manifest. See {@link MediaButtonReceiver} for 198 * more details. 199 * </p> 200 * @param context The context to use to create the session. 201 * @param tag A short name for debugging purposes. 202 * @param mbrComponent The component name for your media button receiver. 203 * @param mbrIntent The PendingIntent for your receiver component that handles 204 * media button events. This is optional and will be used on between 205 * {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2} and 206 * {@link android.os.Build.VERSION_CODES#KITKAT_WATCH} instead of the 207 * component name. 208 */ 209 public MediaSessionCompat(Context context, String tag, ComponentName mbrComponent, 210 PendingIntent mbrIntent) { 211 if (context == null) { 212 throw new IllegalArgumentException("context must not be null"); 213 } 214 if (TextUtils.isEmpty(tag)) { 215 throw new IllegalArgumentException("tag must not be null or empty"); 216 } 217 218 if (android.os.Build.VERSION.SDK_INT >= 21) { 219 mImpl = new MediaSessionImplApi21(context, tag); 220 } else { 221 mImpl = new MediaSessionImplBase(context, tag, mbrComponent, mbrIntent); 222 } 223 mController = new MediaControllerCompat(context, this); 224 225 if (sMaxBitmapSize == 0) { 226 sMaxBitmapSize = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 227 MAX_BITMAP_SIZE_IN_DP, context.getResources().getDisplayMetrics()); 228 } 229 } 230 231 private MediaSessionCompat(Context context, MediaSessionImpl impl) { 232 mImpl = impl; 233 mController = new MediaControllerCompat(context, this); 234 } 235 236 /** 237 * Add a callback to receive updates on for the MediaSession. This includes 238 * media button and volume events. The caller's thread will be used to post 239 * events. 240 * 241 * @param callback The callback object 242 */ 243 public void setCallback(Callback callback) { 244 setCallback(callback, null); 245 } 246 247 /** 248 * Set the callback to receive updates for the MediaSession. This includes 249 * media button and volume events. Set the callback to null to stop 250 * receiving events. 251 * 252 * @param callback The callback to receive updates on. 253 * @param handler The handler that events should be posted on. 254 */ 255 public void setCallback(Callback callback, Handler handler) { 256 mImpl.setCallback(callback, handler != null ? handler : new Handler()); 257 } 258 259 /** 260 * Set an intent for launching UI for this Session. This can be used as a 261 * quick link to an ongoing media screen. The intent should be for an 262 * activity that may be started using 263 * {@link Activity#startActivity(Intent)}. 264 * 265 * @param pi The intent to launch to show UI for this Session. 266 */ 267 public void setSessionActivity(PendingIntent pi) { 268 mImpl.setSessionActivity(pi); 269 } 270 271 /** 272 * Set a pending intent for your media button receiver to allow restarting 273 * playback after the session has been stopped. If your app is started in 274 * this way an {@link Intent#ACTION_MEDIA_BUTTON} intent will be sent via 275 * the pending intent. 276 * <p> 277 * This method will only work on 278 * {@link android.os.Build.VERSION_CODES#LOLLIPOP} and later. Earlier 279 * platform versions must include the media button receiver in the 280 * constructor. 281 * 282 * @param mbr The {@link PendingIntent} to send the media button event to. 283 */ 284 public void setMediaButtonReceiver(PendingIntent mbr) { 285 mImpl.setMediaButtonReceiver(mbr); 286 } 287 288 /** 289 * Set any flags for the session. 290 * 291 * @param flags The flags to set for this session. 292 */ 293 public void setFlags(@SessionFlags int flags) { 294 mImpl.setFlags(flags); 295 } 296 297 /** 298 * Set the stream this session is playing on. This will affect the system's 299 * volume handling for this session. If {@link #setPlaybackToRemote} was 300 * previously called it will stop receiving volume commands and the system 301 * will begin sending volume changes to the appropriate stream. 302 * <p> 303 * By default sessions are on {@link AudioManager#STREAM_MUSIC}. 304 * 305 * @param stream The {@link AudioManager} stream this session is playing on. 306 */ 307 public void setPlaybackToLocal(int stream) { 308 mImpl.setPlaybackToLocal(stream); 309 } 310 311 /** 312 * Configure this session to use remote volume handling. This must be called 313 * to receive volume button events, otherwise the system will adjust the 314 * current stream volume for this session. If {@link #setPlaybackToLocal} 315 * was previously called that stream will stop receiving volume changes for 316 * this session. 317 * <p> 318 * On platforms earlier than {@link android.os.Build.VERSION_CODES#LOLLIPOP} 319 * this will only allow an app to handle volume commands sent directly to 320 * the session by a {@link MediaControllerCompat}. System routing of volume 321 * keys will not use the volume provider. 322 * 323 * @param volumeProvider The provider that will handle volume changes. May 324 * not be null. 325 */ 326 public void setPlaybackToRemote(VolumeProviderCompat volumeProvider) { 327 if (volumeProvider == null) { 328 throw new IllegalArgumentException("volumeProvider may not be null!"); 329 } 330 mImpl.setPlaybackToRemote(volumeProvider); 331 } 332 333 /** 334 * Set if this session is currently active and ready to receive commands. If 335 * set to false your session's controller may not be discoverable. You must 336 * set the session to active before it can start receiving media button 337 * events or transport commands. 338 * <p> 339 * On platforms earlier than 340 * {@link android.os.Build.VERSION_CODES#LOLLIPOP}, 341 * a media button event receiver should be set via the constructor to 342 * receive media button events. 343 * 344 * @param active Whether this session is active or not. 345 */ 346 public void setActive(boolean active) { 347 mImpl.setActive(active); 348 for (OnActiveChangeListener listener : mActiveListeners) { 349 listener.onActiveChanged(); 350 } 351 } 352 353 /** 354 * Get the current active state of this session. 355 * 356 * @return True if the session is active, false otherwise. 357 */ 358 public boolean isActive() { 359 return mImpl.isActive(); 360 } 361 362 /** 363 * Send a proprietary event to all MediaControllers listening to this 364 * Session. It's up to the Controller/Session owner to determine the meaning 365 * of any events. 366 * 367 * @param event The name of the event to send 368 * @param extras Any extras included with the event 369 */ 370 public void sendSessionEvent(String event, Bundle extras) { 371 if (TextUtils.isEmpty(event)) { 372 throw new IllegalArgumentException("event cannot be null or empty"); 373 } 374 mImpl.sendSessionEvent(event, extras); 375 } 376 377 /** 378 * This must be called when an app has finished performing playback. If 379 * playback is expected to start again shortly the session can be left open, 380 * but it must be released if your activity or service is being destroyed. 381 */ 382 public void release() { 383 mImpl.release(); 384 } 385 386 /** 387 * Retrieve a token object that can be used by apps to create a 388 * {@link MediaControllerCompat} for interacting with this session. The 389 * owner of the session is responsible for deciding how to distribute these 390 * tokens. 391 * <p> 392 * On platform versions before 393 * {@link android.os.Build.VERSION_CODES#LOLLIPOP} this token may only be 394 * used within your app as there is no way to guarantee other apps are using 395 * the same version of the support library. 396 * 397 * @return A token that can be used to create a media controller for this 398 * session. 399 */ 400 public Token getSessionToken() { 401 return mImpl.getSessionToken(); 402 } 403 404 /** 405 * Get a controller for this session. This is a convenience method to avoid 406 * having to cache your own controller in process. 407 * 408 * @return A controller for this session. 409 */ 410 public MediaControllerCompat getController() { 411 return mController; 412 } 413 414 /** 415 * Update the current playback state. 416 * 417 * @param state The current state of playback 418 */ 419 public void setPlaybackState(PlaybackStateCompat state) { 420 mImpl.setPlaybackState(state); 421 } 422 423 /** 424 * Update the current metadata. New metadata can be created using 425 * {@link android.support.v4.media.MediaMetadataCompat.Builder}. This operation may take time 426 * proportional to the size of the bitmap to replace large bitmaps with a scaled down copy. 427 * 428 * @param metadata The new metadata 429 * @see android.support.v4.media.MediaMetadataCompat.Builder#putBitmap 430 */ 431 public void setMetadata(MediaMetadataCompat metadata) { 432 mImpl.setMetadata(metadata); 433 } 434 435 /** 436 * Update the list of items in the play queue. It is an ordered list and 437 * should contain the current item, and previous or upcoming items if they 438 * exist. Specify null if there is no current play queue. 439 * <p> 440 * The queue should be of reasonable size. If the play queue is unbounded 441 * within your app, it is better to send a reasonable amount in a sliding 442 * window instead. 443 * 444 * @param queue A list of items in the play queue. 445 */ 446 public void setQueue(List<QueueItem> queue) { 447 mImpl.setQueue(queue); 448 } 449 450 /** 451 * Set the title of the play queue. The UI should display this title along 452 * with the play queue itself. e.g. "Play Queue", "Now Playing", or an album 453 * name. 454 * 455 * @param title The title of the play queue. 456 */ 457 public void setQueueTitle(CharSequence title) { 458 mImpl.setQueueTitle(title); 459 } 460 461 /** 462 * Set the style of rating used by this session. Apps trying to set the 463 * rating should use this style. Must be one of the following: 464 * <ul> 465 * <li>{@link RatingCompat#RATING_NONE}</li> 466 * <li>{@link RatingCompat#RATING_3_STARS}</li> 467 * <li>{@link RatingCompat#RATING_4_STARS}</li> 468 * <li>{@link RatingCompat#RATING_5_STARS}</li> 469 * <li>{@link RatingCompat#RATING_HEART}</li> 470 * <li>{@link RatingCompat#RATING_PERCENTAGE}</li> 471 * <li>{@link RatingCompat#RATING_THUMB_UP_DOWN}</li> 472 * </ul> 473 */ 474 public void setRatingType(@RatingCompat.Style int type) { 475 mImpl.setRatingType(type); 476 } 477 478 /** 479 * Set some extras that can be associated with the 480 * {@link MediaSessionCompat}. No assumptions should be made as to how a 481 * {@link MediaControllerCompat} will handle these extras. Keys should be 482 * fully qualified (e.g. com.example.MY_EXTRA) to avoid conflicts. 483 * 484 * @param extras The extras associated with the session. 485 */ 486 public void setExtras(Bundle extras) { 487 mImpl.setExtras(extras); 488 } 489 490 /** 491 * Gets the underlying framework {@link android.media.session.MediaSession} 492 * object. 493 * <p> 494 * This method is only supported on API 21+. 495 * </p> 496 * 497 * @return The underlying {@link android.media.session.MediaSession} object, 498 * or null if none. 499 */ 500 public Object getMediaSession() { 501 return mImpl.getMediaSession(); 502 } 503 504 /** 505 * Gets the underlying framework {@link android.media.RemoteControlClient} 506 * object. 507 * <p> 508 * This method is only supported on APIs 14-20. On API 21+ 509 * {@link #getMediaSession()} should be used instead. 510 * 511 * @return The underlying {@link android.media.RemoteControlClient} object, 512 * or null if none. 513 */ 514 public Object getRemoteControlClient() { 515 return mImpl.getRemoteControlClient(); 516 } 517 518 /** 519 * Returns the name of the package that sent the last media button, transport control, or 520 * command from controllers and the system. This is only valid while in a request callback, such 521 * as {@link Callback#onPlay}. This method is not available and returns null on pre-N devices. 522 * 523 * @hide 524 */ 525 public String getCallingPackage() { 526 return mImpl.getCallingPackage(); 527 } 528 529 /** 530 * Adds a listener to be notified when the active status of this session 531 * changes. This is primarily used by the support library and should not be 532 * needed by apps. 533 * 534 * @param listener The listener to add. 535 */ 536 public void addOnActiveChangeListener(OnActiveChangeListener listener) { 537 if (listener == null) { 538 throw new IllegalArgumentException("Listener may not be null"); 539 } 540 mActiveListeners.add(listener); 541 } 542 543 /** 544 * Stops the listener from being notified when the active status of this 545 * session changes. 546 * 547 * @param listener The listener to remove. 548 */ 549 public void removeOnActiveChangeListener(OnActiveChangeListener listener) { 550 if (listener == null) { 551 throw new IllegalArgumentException("Listener may not be null"); 552 } 553 mActiveListeners.remove(listener); 554 } 555 556 /** 557 * Creates an instance from a framework {@link android.media.session.MediaSession} object. 558 * <p> 559 * This method is only supported on API 21+. On API 20 and below, it returns null. 560 * </p> 561 * 562 * @param context The context to use to create the session. 563 * @param mediaSession A {@link android.media.session.MediaSession} object. 564 * @return An equivalent {@link MediaSessionCompat} object, or null if none. 565 * @deprecated Use {@link #fromMediaSession(Context, Object)} instead. 566 */ 567 @Deprecated 568 public static MediaSessionCompat obtain(Context context, Object mediaSession) { 569 return fromMediaSession(context, mediaSession); 570 } 571 572 /** 573 * Creates an instance from a framework {@link android.media.session.MediaSession} object. 574 * <p> 575 * This method is only supported on API 21+. On API 20 and below, it returns null. 576 * </p> 577 * 578 * @param context The context to use to create the session. 579 * @param mediaSession A {@link android.media.session.MediaSession} object. 580 * @return An equivalent {@link MediaSessionCompat} object, or null if none. 581 */ 582 public static MediaSessionCompat fromMediaSession(Context context, Object mediaSession) { 583 if (context == null || mediaSession == null || Build.VERSION.SDK_INT < 21) { 584 return null; 585 } 586 return new MediaSessionCompat(context, new MediaSessionImplApi21(mediaSession)); 587 } 588 589 /** 590 * Receives transport controls, media buttons, and commands from controllers 591 * and the system. The callback may be set using {@link #setCallback}. 592 */ 593 public abstract static class Callback { 594 final Object mCallbackObj; 595 596 public Callback() { 597 if (android.os.Build.VERSION.SDK_INT >= 24) { 598 mCallbackObj = MediaSessionCompatApi24.createCallback(new StubApi24()); 599 } else if (android.os.Build.VERSION.SDK_INT >= 23) { 600 mCallbackObj = MediaSessionCompatApi23.createCallback(new StubApi23()); 601 } else if (android.os.Build.VERSION.SDK_INT >= 21) { 602 mCallbackObj = MediaSessionCompatApi21.createCallback(new StubApi21()); 603 } else { 604 mCallbackObj = null; 605 } 606 } 607 608 /** 609 * Called when a controller has sent a custom command to this session. 610 * The owner of the session may handle custom commands but is not 611 * required to. 612 * 613 * @param command The command name. 614 * @param extras Optional parameters for the command, may be null. 615 * @param cb A result receiver to which a result may be sent by the command, may be null. 616 */ 617 public void onCommand(String command, Bundle extras, ResultReceiver cb) { 618 } 619 620 /** 621 * Override to handle media button events. 622 * 623 * @param mediaButtonEvent The media button event intent. 624 * @return True if the event was handled, false otherwise. 625 */ 626 public boolean onMediaButtonEvent(Intent mediaButtonEvent) { 627 return false; 628 } 629 630 /** 631 * Override to handle requests to prepare playback. During the preparation, a session 632 * should not hold audio focus in order to allow other session play seamlessly. 633 * The state of playback should be updated to {@link PlaybackStateCompat#STATE_PAUSED} 634 * after the preparation is done. 635 */ 636 public void onPrepare() { 637 } 638 639 /** 640 * Override to handle requests to prepare for playing a specific mediaId that was provided 641 * by your app. During the preparation, a session should not hold audio focus in order to 642 * allow other session play seamlessly. The state of playback should be updated to 643 * {@link PlaybackStateCompat#STATE_PAUSED} after the preparation is done. The playback 644 * of the prepared content should start in the implementation of {@link #onPlay}. Override 645 * {@link #onPlayFromMediaId} to handle requests for starting playback without preparation. 646 */ 647 public void onPrepareFromMediaId(String mediaId, Bundle extras) { 648 } 649 650 /** 651 * Override to handle requests to prepare playback from a search query. An 652 * empty query indicates that the app may prepare any music. The 653 * implementation should attempt to make a smart choice about what to 654 * play. During the preparation, a session should not hold audio focus in order to allow 655 * other session play seamlessly. The state of playback should be updated to 656 * {@link PlaybackStateCompat#STATE_PAUSED} after the preparation is done. 657 * The playback of the prepared content should start in the implementation of 658 * {@link #onPlay}. Override {@link #onPlayFromSearch} to handle requests for 659 * starting playback without preparation. 660 */ 661 public void onPrepareFromSearch(String query, Bundle extras) { 662 } 663 664 /** 665 * Override to handle requests to prepare a specific media item represented by a URI. 666 * During the preparation, a session should not hold audio focus in order to allow other 667 * session play seamlessly. The state of playback should be updated to 668 * {@link PlaybackStateCompat#STATE_PAUSED} after the preparation is done. The playback of 669 * the prepared content should start in the implementation of {@link #onPlay}. Override 670 * {@link #onPlayFromUri} to handle requests for starting playback without preparation. 671 */ 672 public void onPrepareFromUri(Uri uri, Bundle extras) { 673 } 674 675 /** 676 * Override to handle requests to begin playback. 677 */ 678 public void onPlay() { 679 } 680 681 /** 682 * Override to handle requests to play a specific mediaId that was 683 * provided by your app. 684 */ 685 public void onPlayFromMediaId(String mediaId, Bundle extras) { 686 } 687 688 /** 689 * Override to handle requests to begin playback from a search query. An 690 * empty query indicates that the app may play any music. The 691 * implementation should attempt to make a smart choice about what to 692 * play. 693 */ 694 public void onPlayFromSearch(String query, Bundle extras) { 695 } 696 697 /** 698 * Override to handle requests to play a specific media item represented by a URI. 699 */ 700 public void onPlayFromUri(Uri uri, Bundle extras) { 701 } 702 703 /** 704 * Override to handle requests to play an item with a given id from the 705 * play queue. 706 */ 707 public void onSkipToQueueItem(long id) { 708 } 709 710 /** 711 * Override to handle requests to pause playback. 712 */ 713 public void onPause() { 714 } 715 716 /** 717 * Override to handle requests to skip to the next media item. 718 */ 719 public void onSkipToNext() { 720 } 721 722 /** 723 * Override to handle requests to skip to the previous media item. 724 */ 725 public void onSkipToPrevious() { 726 } 727 728 /** 729 * Override to handle requests to fast forward. 730 */ 731 public void onFastForward() { 732 } 733 734 /** 735 * Override to handle requests to rewind. 736 */ 737 public void onRewind() { 738 } 739 740 /** 741 * Override to handle requests to stop playback. 742 */ 743 public void onStop() { 744 } 745 746 /** 747 * Override to handle requests to seek to a specific position in ms. 748 * 749 * @param pos New position to move to, in milliseconds. 750 */ 751 public void onSeekTo(long pos) { 752 } 753 754 /** 755 * Override to handle the item being rated. 756 * 757 * @param rating 758 */ 759 public void onSetRating(RatingCompat rating) { 760 } 761 762 /** 763 * Called when a {@link MediaControllerCompat} wants a 764 * {@link PlaybackStateCompat.CustomAction} to be performed. 765 * 766 * @param action The action that was originally sent in the 767 * {@link PlaybackStateCompat.CustomAction}. 768 * @param extras Optional extras specified by the 769 * {@link MediaControllerCompat}. 770 */ 771 public void onCustomAction(String action, Bundle extras) { 772 } 773 774 private class StubApi21 implements MediaSessionCompatApi21.Callback { 775 776 @Override 777 public void onCommand(String command, Bundle extras, ResultReceiver cb) { 778 Callback.this.onCommand(command, extras, cb); 779 } 780 781 @Override 782 public boolean onMediaButtonEvent(Intent mediaButtonIntent) { 783 return Callback.this.onMediaButtonEvent(mediaButtonIntent); 784 } 785 786 @Override 787 public void onPlay() { 788 Callback.this.onPlay(); 789 } 790 791 @Override 792 public void onPlayFromMediaId(String mediaId, Bundle extras) { 793 Callback.this.onPlayFromMediaId(mediaId, extras); 794 } 795 796 @Override 797 public void onPlayFromSearch(String search, Bundle extras) { 798 Callback.this.onPlayFromSearch(search, extras); 799 } 800 801 @Override 802 public void onSkipToQueueItem(long id) { 803 Callback.this.onSkipToQueueItem(id); 804 } 805 806 @Override 807 public void onPause() { 808 Callback.this.onPause(); 809 } 810 811 @Override 812 public void onSkipToNext() { 813 Callback.this.onSkipToNext(); 814 } 815 816 @Override 817 public void onSkipToPrevious() { 818 Callback.this.onSkipToPrevious(); 819 } 820 821 @Override 822 public void onFastForward() { 823 Callback.this.onFastForward(); 824 } 825 826 @Override 827 public void onRewind() { 828 Callback.this.onRewind(); 829 } 830 831 @Override 832 public void onStop() { 833 Callback.this.onStop(); 834 } 835 836 @Override 837 public void onSeekTo(long pos) { 838 Callback.this.onSeekTo(pos); 839 } 840 841 @Override 842 public void onSetRating(Object ratingObj) { 843 Callback.this.onSetRating(RatingCompat.fromRating(ratingObj)); 844 } 845 846 @Override 847 public void onCustomAction(String action, Bundle extras) { 848 if (action.equals(ACTION_PLAY_FROM_URI)) { 849 Uri uri = extras.getParcelable(ACTION_ARGUMENT_URI); 850 Bundle bundle = extras.getParcelable(ACTION_ARGUMENT_EXTRAS); 851 Callback.this.onPlayFromUri(uri, bundle); 852 } else if (action.equals(ACTION_PREPARE)) { 853 Callback.this.onPrepare(); 854 } else if (action.equals(ACTION_PREPARE_FROM_MEDIA_ID)) { 855 String mediaId = extras.getString(ACTION_ARGUMENT_MEDIA_ID); 856 Bundle bundle = extras.getBundle(ACTION_ARGUMENT_EXTRAS); 857 Callback.this.onPrepareFromMediaId(mediaId, bundle); 858 } else if (action.equals(ACTION_PREPARE_FROM_SEARCH)) { 859 String query = extras.getString(ACTION_ARGUMENT_QUERY); 860 Bundle bundle = extras.getBundle(ACTION_ARGUMENT_EXTRAS); 861 Callback.this.onPrepareFromSearch(query, bundle); 862 } else if (action.equals(ACTION_PREPARE_FROM_URI)) { 863 Uri uri = extras.getParcelable(ACTION_ARGUMENT_URI); 864 Bundle bundle = extras.getBundle(ACTION_ARGUMENT_EXTRAS); 865 Callback.this.onPrepareFromUri(uri, bundle); 866 } else { 867 Callback.this.onCustomAction(action, extras); 868 } 869 } 870 } 871 872 private class StubApi23 extends StubApi21 implements MediaSessionCompatApi23.Callback { 873 874 @Override 875 public void onPlayFromUri(Uri uri, Bundle extras) { 876 Callback.this.onPlayFromUri(uri, extras); 877 } 878 } 879 880 private class StubApi24 extends StubApi23 implements MediaSessionCompatApi24.Callback { 881 882 @Override 883 public void onPrepare() { 884 Callback.this.onPrepare(); 885 } 886 887 @Override 888 public void onPrepareFromMediaId(String mediaId, Bundle extras) { 889 Callback.this.onPrepareFromMediaId(mediaId, extras); 890 } 891 892 @Override 893 public void onPrepareFromSearch(String query, Bundle extras) { 894 Callback.this.onPrepareFromSearch(query, extras); 895 } 896 897 @Override 898 public void onPrepareFromUri(Uri uri, Bundle extras) { 899 Callback.this.onPrepareFromUri(uri, extras); 900 } 901 } 902 } 903 904 /** 905 * Represents an ongoing session. This may be passed to apps by the session 906 * owner to allow them to create a {@link MediaControllerCompat} to communicate with 907 * the session. 908 */ 909 public static final class Token implements Parcelable { 910 private final Object mInner; 911 912 Token(Object inner) { 913 mInner = inner; 914 } 915 916 /** 917 * Creates a compat Token from a framework 918 * {@link android.media.session.MediaSession.Token} object. 919 * <p> 920 * This method is only supported on 921 * {@link android.os.Build.VERSION_CODES#LOLLIPOP} and later. 922 * </p> 923 * 924 * @param token The framework token object. 925 * @return A compat Token for use with {@link MediaControllerCompat}. 926 */ 927 public static Token fromToken(Object token) { 928 if (token == null || android.os.Build.VERSION.SDK_INT < 21) { 929 return null; 930 } 931 return new Token(MediaSessionCompatApi21.verifyToken(token)); 932 } 933 934 @Override 935 public int describeContents() { 936 return 0; 937 } 938 939 @Override 940 public void writeToParcel(Parcel dest, int flags) { 941 if (android.os.Build.VERSION.SDK_INT >= 21) { 942 dest.writeParcelable((Parcelable) mInner, flags); 943 } else { 944 dest.writeStrongBinder((IBinder) mInner); 945 } 946 } 947 948 @Override 949 public int hashCode() { 950 if (mInner == null) { 951 return 0; 952 } 953 return mInner.hashCode(); 954 } 955 956 @Override 957 public boolean equals(Object obj) { 958 if (this == obj) { 959 return true; 960 } 961 if (!(obj instanceof Token)) { 962 return false; 963 } 964 965 Token other = (Token) obj; 966 if (mInner == null) { 967 return other.mInner == null; 968 } 969 if (other.mInner == null) { 970 return false; 971 } 972 return mInner.equals(other.mInner); 973 } 974 975 /** 976 * Gets the underlying framework {@link android.media.session.MediaSession.Token} object. 977 * <p> 978 * This method is only supported on API 21+. 979 * </p> 980 * 981 * @return The underlying {@link android.media.session.MediaSession.Token} object, 982 * or null if none. 983 */ 984 public Object getToken() { 985 return mInner; 986 } 987 988 public static final Parcelable.Creator<Token> CREATOR 989 = new Parcelable.Creator<Token>() { 990 @Override 991 public Token createFromParcel(Parcel in) { 992 Object inner; 993 if (android.os.Build.VERSION.SDK_INT >= 21) { 994 inner = in.readParcelable(null); 995 } else { 996 inner = in.readStrongBinder(); 997 } 998 return new Token(inner); 999 } 1000 1001 @Override 1002 public Token[] newArray(int size) { 1003 return new Token[size]; 1004 } 1005 }; 1006 } 1007 1008 /** 1009 * A single item that is part of the play queue. It contains a description 1010 * of the item and its id in the queue. 1011 */ 1012 public static final class QueueItem implements Parcelable { 1013 /** 1014 * This id is reserved. No items can be explicitly assigned this id. 1015 */ 1016 public static final int UNKNOWN_ID = -1; 1017 1018 private final MediaDescriptionCompat mDescription; 1019 private final long mId; 1020 1021 private Object mItem; 1022 1023 /** 1024 * Create a new {@link MediaSessionCompat.QueueItem}. 1025 * 1026 * @param description The {@link MediaDescriptionCompat} for this item. 1027 * @param id An identifier for this item. It must be unique within the 1028 * play queue and cannot be {@link #UNKNOWN_ID}. 1029 */ 1030 public QueueItem(MediaDescriptionCompat description, long id) { 1031 this(null, description, id); 1032 } 1033 1034 private QueueItem(Object queueItem, MediaDescriptionCompat description, long id) { 1035 if (description == null) { 1036 throw new IllegalArgumentException("Description cannot be null."); 1037 } 1038 if (id == UNKNOWN_ID) { 1039 throw new IllegalArgumentException("Id cannot be QueueItem.UNKNOWN_ID"); 1040 } 1041 mDescription = description; 1042 mId = id; 1043 mItem = queueItem; 1044 } 1045 1046 private QueueItem(Parcel in) { 1047 mDescription = MediaDescriptionCompat.CREATOR.createFromParcel(in); 1048 mId = in.readLong(); 1049 } 1050 1051 /** 1052 * Get the description for this item. 1053 */ 1054 public MediaDescriptionCompat getDescription() { 1055 return mDescription; 1056 } 1057 1058 /** 1059 * Get the queue id for this item. 1060 */ 1061 public long getQueueId() { 1062 return mId; 1063 } 1064 1065 @Override 1066 public void writeToParcel(Parcel dest, int flags) { 1067 mDescription.writeToParcel(dest, flags); 1068 dest.writeLong(mId); 1069 } 1070 1071 @Override 1072 public int describeContents() { 1073 return 0; 1074 } 1075 1076 /** 1077 * Get the underlying 1078 * {@link android.media.session.MediaSession.QueueItem}. 1079 * <p> 1080 * On builds before {@link android.os.Build.VERSION_CODES#LOLLIPOP} null 1081 * is returned. 1082 * 1083 * @return The underlying 1084 * {@link android.media.session.MediaSession.QueueItem} or null. 1085 */ 1086 public Object getQueueItem() { 1087 if (mItem != null || android.os.Build.VERSION.SDK_INT < 21) { 1088 return mItem; 1089 } 1090 mItem = MediaSessionCompatApi21.QueueItem.createItem(mDescription.getMediaDescription(), 1091 mId); 1092 return mItem; 1093 } 1094 1095 /** 1096 * Creates an instance from a framework {@link android.media.session.MediaSession.QueueItem} 1097 * object. 1098 * <p> 1099 * This method is only supported on API 21+. On API 20 and below, it returns null. 1100 * </p> 1101 * 1102 * @param queueItem A {@link android.media.session.MediaSession.QueueItem} object. 1103 * @return An equivalent {@link QueueItem} object, or null if none. 1104 * @deprecated Use {@link #fromQueueItem(Object)} instead. 1105 */ 1106 @Deprecated 1107 public static QueueItem obtain(Object queueItem) { 1108 return fromQueueItem(queueItem); 1109 } 1110 1111 /** 1112 * Creates an instance from a framework {@link android.media.session.MediaSession.QueueItem} 1113 * object. 1114 * <p> 1115 * This method is only supported on API 21+. On API 20 and below, it returns null. 1116 * </p> 1117 * 1118 * @param queueItem A {@link android.media.session.MediaSession.QueueItem} object. 1119 * @return An equivalent {@link QueueItem} object, or null if none. 1120 */ 1121 public static QueueItem fromQueueItem(Object queueItem) { 1122 if (queueItem == null || Build.VERSION.SDK_INT < 21) { 1123 return null; 1124 } 1125 Object descriptionObj = MediaSessionCompatApi21.QueueItem.getDescription(queueItem); 1126 MediaDescriptionCompat description = MediaDescriptionCompat.fromMediaDescription( 1127 descriptionObj); 1128 long id = MediaSessionCompatApi21.QueueItem.getQueueId(queueItem); 1129 return new QueueItem(queueItem, description, id); 1130 } 1131 1132 /** 1133 * Creates a list of {@link QueueItem} objects from a framework 1134 * {@link android.media.session.MediaSession.QueueItem} object list. 1135 * <p> 1136 * This method is only supported on API 21+. On API 20 and below, it returns null. 1137 * </p> 1138 * 1139 * @param itemList A list of {@link android.media.session.MediaSession.QueueItem} objects. 1140 * @return An equivalent list of {@link QueueItem} objects, or null if none. 1141 */ 1142 public static List<QueueItem> fromQueueItemList(List<?> itemList) { 1143 if (itemList == null || Build.VERSION.SDK_INT < 21) { 1144 return null; 1145 } 1146 List<QueueItem> items = new ArrayList<>(); 1147 for (Object itemObj : itemList) { 1148 items.add(fromQueueItem(itemObj)); 1149 } 1150 return items; 1151 } 1152 1153 public static final Creator<MediaSessionCompat.QueueItem> CREATOR 1154 = new Creator<MediaSessionCompat.QueueItem>() { 1155 1156 @Override 1157 public MediaSessionCompat.QueueItem createFromParcel(Parcel p) { 1158 return new MediaSessionCompat.QueueItem(p); 1159 } 1160 1161 @Override 1162 public MediaSessionCompat.QueueItem[] newArray(int size) { 1163 return new MediaSessionCompat.QueueItem[size]; 1164 } 1165 }; 1166 1167 @Override 1168 public String toString() { 1169 return "MediaSession.QueueItem {" + 1170 "Description=" + mDescription + 1171 ", Id=" + mId + " }"; 1172 } 1173 } 1174 1175 /** 1176 * This is a wrapper for {@link ResultReceiver} for sending over aidl 1177 * interfaces. The framework version was not exposed to aidls until 1178 * {@link android.os.Build.VERSION_CODES#LOLLIPOP}. 1179 */ 1180 static final class ResultReceiverWrapper implements Parcelable { 1181 private ResultReceiver mResultReceiver; 1182 1183 public ResultReceiverWrapper(ResultReceiver resultReceiver) { 1184 mResultReceiver = resultReceiver; 1185 } 1186 1187 ResultReceiverWrapper(Parcel in) { 1188 mResultReceiver = ResultReceiver.CREATOR.createFromParcel(in); 1189 } 1190 1191 public static final Creator<ResultReceiverWrapper> 1192 CREATOR = new Creator<ResultReceiverWrapper>() { 1193 @Override 1194 public ResultReceiverWrapper createFromParcel(Parcel p) { 1195 return new ResultReceiverWrapper(p); 1196 } 1197 1198 @Override 1199 public ResultReceiverWrapper[] newArray(int size) { 1200 return new ResultReceiverWrapper[size]; 1201 } 1202 }; 1203 1204 @Override 1205 public int describeContents() { 1206 return 0; 1207 } 1208 1209 @Override 1210 public void writeToParcel(Parcel dest, int flags) { 1211 mResultReceiver.writeToParcel(dest, flags); 1212 } 1213 } 1214 1215 public interface OnActiveChangeListener { 1216 void onActiveChanged(); 1217 } 1218 1219 interface MediaSessionImpl { 1220 void setCallback(Callback callback, Handler handler); 1221 void setFlags(@SessionFlags int flags); 1222 void setPlaybackToLocal(int stream); 1223 void setPlaybackToRemote(VolumeProviderCompat volumeProvider); 1224 void setActive(boolean active); 1225 boolean isActive(); 1226 void sendSessionEvent(String event, Bundle extras); 1227 void release(); 1228 Token getSessionToken(); 1229 void setPlaybackState(PlaybackStateCompat state); 1230 void setMetadata(MediaMetadataCompat metadata); 1231 1232 void setSessionActivity(PendingIntent pi); 1233 1234 void setMediaButtonReceiver(PendingIntent mbr); 1235 void setQueue(List<QueueItem> queue); 1236 void setQueueTitle(CharSequence title); 1237 1238 void setRatingType(@RatingCompat.Style int type); 1239 void setExtras(Bundle extras); 1240 1241 Object getMediaSession(); 1242 1243 Object getRemoteControlClient(); 1244 1245 String getCallingPackage(); 1246 } 1247 1248 static class MediaSessionImplBase implements MediaSessionImpl { 1249 private final Context mContext; 1250 private final ComponentName mMediaButtonReceiverComponentName; 1251 private final PendingIntent mMediaButtonReceiverIntent; 1252 private final Object mRccObj; 1253 private final MediaSessionStub mStub; 1254 private final Token mToken; 1255 private final String mPackageName; 1256 private final String mTag; 1257 private final AudioManager mAudioManager; 1258 1259 private final Object mLock = new Object(); 1260 private final RemoteCallbackList<IMediaControllerCallback> mControllerCallbacks 1261 = new RemoteCallbackList<>(); 1262 1263 private MessageHandler mHandler; 1264 private boolean mDestroyed = false; 1265 private boolean mIsActive = false; 1266 private boolean mIsRccRegistered = false; 1267 private boolean mIsMbrRegistered = false; 1268 private volatile Callback mCallback; 1269 1270 private @SessionFlags int mFlags; 1271 1272 private MediaMetadataCompat mMetadata; 1273 private PlaybackStateCompat mState; 1274 private PendingIntent mSessionActivity; 1275 private List<QueueItem> mQueue; 1276 private CharSequence mQueueTitle; 1277 private @RatingCompat.Style int mRatingType; 1278 private Bundle mExtras; 1279 1280 private int mVolumeType; 1281 private int mLocalStream; 1282 private VolumeProviderCompat mVolumeProvider; 1283 1284 private VolumeProviderCompat.Callback mVolumeCallback 1285 = new VolumeProviderCompat.Callback() { 1286 @Override 1287 public void onVolumeChanged(VolumeProviderCompat volumeProvider) { 1288 if (mVolumeProvider != volumeProvider) { 1289 return; 1290 } 1291 ParcelableVolumeInfo info = new ParcelableVolumeInfo(mVolumeType, mLocalStream, 1292 volumeProvider.getVolumeControl(), volumeProvider.getMaxVolume(), 1293 volumeProvider.getCurrentVolume()); 1294 sendVolumeInfoChanged(info); 1295 } 1296 }; 1297 1298 public MediaSessionImplBase(Context context, String tag, ComponentName mbrComponent, 1299 PendingIntent mbrIntent) { 1300 if (mbrComponent == null) { 1301 mbrComponent = MediaButtonReceiver.getMediaButtonReceiverComponent(context); 1302 if (mbrComponent == null) { 1303 Log.w(TAG, "Couldn't find a unique registered media button receiver in the " 1304 + "given context."); 1305 } 1306 } 1307 if (mbrComponent != null && mbrIntent == null) { 1308 // construct a PendingIntent for the media button 1309 Intent mediaButtonIntent = new Intent(Intent.ACTION_MEDIA_BUTTON); 1310 // the associated intent will be handled by the component being registered 1311 mediaButtonIntent.setComponent(mbrComponent); 1312 mbrIntent = PendingIntent.getBroadcast(context, 1313 0/* requestCode, ignored */, mediaButtonIntent, 0/* flags */); 1314 } 1315 if (mbrComponent == null) { 1316 throw new IllegalArgumentException( 1317 "MediaButtonReceiver component may not be null."); 1318 } 1319 mContext = context; 1320 mPackageName = context.getPackageName(); 1321 mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); 1322 mTag = tag; 1323 mMediaButtonReceiverComponentName = mbrComponent; 1324 mMediaButtonReceiverIntent = mbrIntent; 1325 mStub = new MediaSessionStub(); 1326 mToken = new Token(mStub); 1327 1328 mRatingType = RatingCompat.RATING_NONE; 1329 mVolumeType = MediaControllerCompat.PlaybackInfo.PLAYBACK_TYPE_LOCAL; 1330 mLocalStream = AudioManager.STREAM_MUSIC; 1331 if (android.os.Build.VERSION.SDK_INT >= 14) { 1332 mRccObj = MediaSessionCompatApi14.createRemoteControlClient(mbrIntent); 1333 } else { 1334 mRccObj = null; 1335 } 1336 } 1337 1338 @Override 1339 public void setCallback(Callback callback, Handler handler) { 1340 mCallback = callback; 1341 if (callback == null) { 1342 // There's nothing to unregister on API < 18 since media buttons 1343 // all go through the media button receiver 1344 if (android.os.Build.VERSION.SDK_INT >= 18) { 1345 MediaSessionCompatApi18.setOnPlaybackPositionUpdateListener(mRccObj, null); 1346 } 1347 if (android.os.Build.VERSION.SDK_INT >= 19) { 1348 MediaSessionCompatApi19.setOnMetadataUpdateListener(mRccObj, null); 1349 } 1350 } else { 1351 if (handler == null) { 1352 handler = new Handler(); 1353 } 1354 synchronized (mLock) { 1355 mHandler = new MessageHandler(handler.getLooper()); 1356 } 1357 MediaSessionCompatApi19.Callback cb19 = new MediaSessionCompatApi19.Callback() { 1358 @Override 1359 public void onSetRating(Object ratingObj) { 1360 postToHandler(MessageHandler.MSG_RATE, 1361 RatingCompat.fromRating(ratingObj)); 1362 } 1363 1364 @Override 1365 public void onSeekTo(long pos) { 1366 postToHandler(MessageHandler.MSG_SEEK_TO, pos); 1367 } 1368 }; 1369 if (android.os.Build.VERSION.SDK_INT >= 18) { 1370 Object onPositionUpdateObj = MediaSessionCompatApi18 1371 .createPlaybackPositionUpdateListener(cb19); 1372 MediaSessionCompatApi18.setOnPlaybackPositionUpdateListener(mRccObj, 1373 onPositionUpdateObj); 1374 } 1375 if (android.os.Build.VERSION.SDK_INT >= 19) { 1376 Object onMetadataUpdateObj = MediaSessionCompatApi19 1377 .createMetadataUpdateListener(cb19); 1378 MediaSessionCompatApi19.setOnMetadataUpdateListener(mRccObj, 1379 onMetadataUpdateObj); 1380 } 1381 } 1382 } 1383 1384 private void postToHandler(int what) { 1385 postToHandler(what, null); 1386 } 1387 1388 private void postToHandler(int what, Object obj) { 1389 postToHandler(what, obj, null); 1390 } 1391 1392 private void postToHandler(int what, Object obj, Bundle extras) { 1393 synchronized (mLock) { 1394 if (mHandler != null) { 1395 mHandler.post(what, obj, extras); 1396 } 1397 } 1398 } 1399 1400 @Override 1401 public void setFlags(@SessionFlags int flags) { 1402 synchronized (mLock) { 1403 mFlags = flags; 1404 } 1405 update(); 1406 } 1407 1408 @Override 1409 public void setPlaybackToLocal(int stream) { 1410 if (mVolumeProvider != null) { 1411 mVolumeProvider.setCallback(null); 1412 } 1413 mVolumeType = MediaControllerCompat.PlaybackInfo.PLAYBACK_TYPE_LOCAL; 1414 ParcelableVolumeInfo info = new ParcelableVolumeInfo(mVolumeType, mLocalStream, 1415 VolumeProviderCompat.VOLUME_CONTROL_ABSOLUTE, 1416 mAudioManager.getStreamMaxVolume(mLocalStream), 1417 mAudioManager.getStreamVolume(mLocalStream)); 1418 sendVolumeInfoChanged(info); 1419 } 1420 1421 @Override 1422 public void setPlaybackToRemote(VolumeProviderCompat volumeProvider) { 1423 if (volumeProvider == null) { 1424 throw new IllegalArgumentException("volumeProvider may not be null"); 1425 } 1426 if (mVolumeProvider != null) { 1427 mVolumeProvider.setCallback(null); 1428 } 1429 mVolumeType = MediaControllerCompat.PlaybackInfo.PLAYBACK_TYPE_REMOTE; 1430 mVolumeProvider = volumeProvider; 1431 ParcelableVolumeInfo info = new ParcelableVolumeInfo(mVolumeType, mLocalStream, 1432 mVolumeProvider.getVolumeControl(), mVolumeProvider.getMaxVolume(), 1433 mVolumeProvider.getCurrentVolume()); 1434 sendVolumeInfoChanged(info); 1435 1436 volumeProvider.setCallback(mVolumeCallback); 1437 } 1438 1439 @Override 1440 public void setActive(boolean active) { 1441 if (active == mIsActive) { 1442 return; 1443 } 1444 mIsActive = active; 1445 if (update()) { 1446 setMetadata(mMetadata); 1447 setPlaybackState(mState); 1448 } 1449 } 1450 1451 @Override 1452 public boolean isActive() { 1453 return mIsActive; 1454 } 1455 1456 @Override 1457 public void sendSessionEvent(String event, Bundle extras) { 1458 sendEvent(event, extras); 1459 } 1460 1461 @Override 1462 public void release() { 1463 mIsActive = false; 1464 mDestroyed = true; 1465 update(); 1466 sendSessionDestroyed(); 1467 } 1468 1469 @Override 1470 public Token getSessionToken() { 1471 return mToken; 1472 } 1473 1474 @Override 1475 public void setPlaybackState(PlaybackStateCompat state) { 1476 synchronized (mLock) { 1477 mState = state; 1478 } 1479 sendState(state); 1480 if (!mIsActive) { 1481 // Don't set the state until after the RCC is registered 1482 return; 1483 } 1484 if (state == null) { 1485 if (android.os.Build.VERSION.SDK_INT >= 14) { 1486 MediaSessionCompatApi14.setState(mRccObj, PlaybackStateCompat.STATE_NONE); 1487 MediaSessionCompatApi14.setTransportControlFlags(mRccObj, 0); 1488 } 1489 } else { 1490 // Set state 1491 if (android.os.Build.VERSION.SDK_INT >= 18) { 1492 MediaSessionCompatApi18.setState(mRccObj, state.getState(), state.getPosition(), 1493 state.getPlaybackSpeed(), state.getLastPositionUpdateTime()); 1494 } else if (android.os.Build.VERSION.SDK_INT >= 14) { 1495 MediaSessionCompatApi14.setState(mRccObj, state.getState()); 1496 } 1497 1498 // Set transport control flags 1499 if (android.os.Build.VERSION.SDK_INT >= 19) { 1500 MediaSessionCompatApi19.setTransportControlFlags(mRccObj, state.getActions()); 1501 } else if (android.os.Build.VERSION.SDK_INT >= 18) { 1502 MediaSessionCompatApi18.setTransportControlFlags(mRccObj, state.getActions()); 1503 } else if (android.os.Build.VERSION.SDK_INT >= 14) { 1504 MediaSessionCompatApi14.setTransportControlFlags(mRccObj, state.getActions()); 1505 } 1506 } 1507 } 1508 1509 @Override 1510 public void setMetadata(MediaMetadataCompat metadata) { 1511 if (metadata != null) { 1512 // Clones the given {@link MediaMetadataCompat}, deep-copying bitmaps in the 1513 // metadata if necessary. Bitmaps can be scaled down if they are large. 1514 metadata = new MediaMetadataCompat.Builder(metadata, sMaxBitmapSize).build(); 1515 } 1516 1517 synchronized (mLock) { 1518 mMetadata = metadata; 1519 } 1520 sendMetadata(metadata); 1521 if (!mIsActive) { 1522 // Don't set metadata until after the rcc has been registered 1523 return; 1524 } 1525 if (android.os.Build.VERSION.SDK_INT >= 19) { 1526 MediaSessionCompatApi19.setMetadata(mRccObj, 1527 metadata == null ? null : metadata.getBundle(), 1528 mState == null ? 0 : mState.getActions()); 1529 } else if (android.os.Build.VERSION.SDK_INT >= 14) { 1530 MediaSessionCompatApi14.setMetadata(mRccObj, 1531 metadata == null ? null : metadata.getBundle()); 1532 } 1533 } 1534 1535 @Override 1536 public void setSessionActivity(PendingIntent pi) { 1537 synchronized (mLock) { 1538 mSessionActivity = pi; 1539 } 1540 } 1541 1542 @Override 1543 public void setMediaButtonReceiver(PendingIntent mbr) { 1544 // Do nothing, changing this is not supported before API 21. 1545 } 1546 1547 @Override 1548 public void setQueue(List<QueueItem> queue) { 1549 mQueue = queue; 1550 sendQueue(queue); 1551 } 1552 1553 @Override 1554 public void setQueueTitle(CharSequence title) { 1555 mQueueTitle = title; 1556 sendQueueTitle(title); 1557 } 1558 1559 @Override 1560 public Object getMediaSession() { 1561 return null; 1562 } 1563 1564 @Override 1565 public Object getRemoteControlClient() { 1566 return mRccObj; 1567 } 1568 1569 @Override 1570 public String getCallingPackage() { 1571 return null; 1572 } 1573 1574 @Override 1575 public void setRatingType(@RatingCompat.Style int type) { 1576 mRatingType = type; 1577 } 1578 1579 @Override 1580 public void setExtras(Bundle extras) { 1581 mExtras = extras; 1582 sendExtras(extras); 1583 } 1584 1585 // Registers/unregisters the RCC and MediaButtonEventReceiver as needed. 1586 private boolean update() { 1587 boolean registeredRcc = false; 1588 if (mIsActive) { 1589 // Register a MBR if it's supported, unregister it 1590 // if support was removed. 1591 if (!mIsMbrRegistered && (mFlags & FLAG_HANDLES_MEDIA_BUTTONS) != 0) { 1592 if (android.os.Build.VERSION.SDK_INT >= 18) { 1593 MediaSessionCompatApi18.registerMediaButtonEventReceiver(mContext, 1594 mMediaButtonReceiverIntent, 1595 mMediaButtonReceiverComponentName); 1596 } else { 1597 AudioManager am = (AudioManager) mContext.getSystemService( 1598 Context.AUDIO_SERVICE); 1599 am.registerMediaButtonEventReceiver(mMediaButtonReceiverComponentName); 1600 } 1601 mIsMbrRegistered = true; 1602 } else if (mIsMbrRegistered && (mFlags & FLAG_HANDLES_MEDIA_BUTTONS) == 0) { 1603 if (android.os.Build.VERSION.SDK_INT >= 18) { 1604 MediaSessionCompatApi18.unregisterMediaButtonEventReceiver(mContext, 1605 mMediaButtonReceiverIntent, 1606 mMediaButtonReceiverComponentName); 1607 } else { 1608 AudioManager am = (AudioManager) mContext.getSystemService( 1609 Context.AUDIO_SERVICE); 1610 am.unregisterMediaButtonEventReceiver(mMediaButtonReceiverComponentName); 1611 } 1612 mIsMbrRegistered = false; 1613 } 1614 // On API 14+ register a RCC if it's supported, unregister it if 1615 // not. 1616 if (android.os.Build.VERSION.SDK_INT >= 14) { 1617 if (!mIsRccRegistered && (mFlags & FLAG_HANDLES_TRANSPORT_CONTROLS) != 0) { 1618 MediaSessionCompatApi14.registerRemoteControlClient(mContext, mRccObj); 1619 mIsRccRegistered = true; 1620 registeredRcc = true; 1621 } else if (mIsRccRegistered 1622 && (mFlags & FLAG_HANDLES_TRANSPORT_CONTROLS) == 0) { 1623 // RCC keeps the state while the system resets its state internally when 1624 // we register RCC. Reset the state so that the states in RCC and the system 1625 // are in sync when we re-register the RCC. 1626 MediaSessionCompatApi14.setState(mRccObj, PlaybackStateCompat.STATE_NONE); 1627 MediaSessionCompatApi14.unregisterRemoteControlClient(mContext, mRccObj); 1628 mIsRccRegistered = false; 1629 } 1630 } 1631 } else { 1632 // When inactive remove any registered components. 1633 if (mIsMbrRegistered) { 1634 if (android.os.Build.VERSION.SDK_INT >= 18) { 1635 MediaSessionCompatApi18.unregisterMediaButtonEventReceiver(mContext, 1636 mMediaButtonReceiverIntent, mMediaButtonReceiverComponentName); 1637 } else { 1638 AudioManager am = (AudioManager) mContext.getSystemService( 1639 Context.AUDIO_SERVICE); 1640 am.unregisterMediaButtonEventReceiver(mMediaButtonReceiverComponentName); 1641 } 1642 mIsMbrRegistered = false; 1643 } 1644 if (mIsRccRegistered) { 1645 // RCC keeps the state while the system resets its state internally when 1646 // we register RCC. Reset the state so that the states in RCC and the system 1647 // are in sync when we re-register the RCC. 1648 MediaSessionCompatApi14.setState(mRccObj, PlaybackStateCompat.STATE_NONE); 1649 MediaSessionCompatApi14.unregisterRemoteControlClient(mContext, mRccObj); 1650 mIsRccRegistered = false; 1651 } 1652 } 1653 return registeredRcc; 1654 } 1655 1656 private void adjustVolume(int direction, int flags) { 1657 if (mVolumeType == MediaControllerCompat.PlaybackInfo.PLAYBACK_TYPE_REMOTE) { 1658 if (mVolumeProvider != null) { 1659 mVolumeProvider.onAdjustVolume(direction); 1660 } 1661 } else { 1662 mAudioManager.adjustStreamVolume(mLocalStream, direction, flags); 1663 } 1664 } 1665 1666 private void setVolumeTo(int value, int flags) { 1667 if (mVolumeType == MediaControllerCompat.PlaybackInfo.PLAYBACK_TYPE_REMOTE) { 1668 if (mVolumeProvider != null) { 1669 mVolumeProvider.onSetVolumeTo(value); 1670 } 1671 } else { 1672 mAudioManager.setStreamVolume(mLocalStream, value, flags); 1673 } 1674 } 1675 1676 private PlaybackStateCompat getStateWithUpdatedPosition() { 1677 PlaybackStateCompat state; 1678 long duration = -1; 1679 synchronized (mLock) { 1680 state = mState; 1681 if (mMetadata != null 1682 && mMetadata.containsKey(MediaMetadataCompat.METADATA_KEY_DURATION)) { 1683 duration = mMetadata.getLong(MediaMetadataCompat.METADATA_KEY_DURATION); 1684 } 1685 } 1686 1687 PlaybackStateCompat result = null; 1688 if (state != null) { 1689 if (state.getState() == PlaybackStateCompat.STATE_PLAYING 1690 || state.getState() == PlaybackStateCompat.STATE_FAST_FORWARDING 1691 || state.getState() == PlaybackStateCompat.STATE_REWINDING) { 1692 long updateTime = state.getLastPositionUpdateTime(); 1693 long currentTime = SystemClock.elapsedRealtime(); 1694 if (updateTime > 0) { 1695 long position = (long) (state.getPlaybackSpeed() 1696 * (currentTime - updateTime)) + state.getPosition(); 1697 if (duration >= 0 && position > duration) { 1698 position = duration; 1699 } else if (position < 0) { 1700 position = 0; 1701 } 1702 PlaybackStateCompat.Builder builder = new PlaybackStateCompat.Builder( 1703 state); 1704 builder.setState(state.getState(), position, state.getPlaybackSpeed(), 1705 currentTime); 1706 result = builder.build(); 1707 } 1708 } 1709 } 1710 return result == null ? state : result; 1711 } 1712 1713 private void sendVolumeInfoChanged(ParcelableVolumeInfo info) { 1714 int size = mControllerCallbacks.beginBroadcast(); 1715 for (int i = size - 1; i >= 0; i--) { 1716 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 1717 try { 1718 cb.onVolumeInfoChanged(info); 1719 } catch (RemoteException e) { 1720 } 1721 } 1722 mControllerCallbacks.finishBroadcast(); 1723 } 1724 1725 private void sendSessionDestroyed() { 1726 int size = mControllerCallbacks.beginBroadcast(); 1727 for (int i = size - 1; i >= 0; i--) { 1728 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 1729 try { 1730 cb.onSessionDestroyed(); 1731 } catch (RemoteException e) { 1732 } 1733 } 1734 mControllerCallbacks.finishBroadcast(); 1735 mControllerCallbacks.kill(); 1736 } 1737 1738 private void sendEvent(String event, Bundle extras) { 1739 int size = mControllerCallbacks.beginBroadcast(); 1740 for (int i = size - 1; i >= 0; i--) { 1741 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 1742 try { 1743 cb.onEvent(event, extras); 1744 } catch (RemoteException e) { 1745 } 1746 } 1747 mControllerCallbacks.finishBroadcast(); 1748 } 1749 1750 private void sendState(PlaybackStateCompat state) { 1751 int size = mControllerCallbacks.beginBroadcast(); 1752 for (int i = size - 1; i >= 0; i--) { 1753 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 1754 try { 1755 cb.onPlaybackStateChanged(state); 1756 } catch (RemoteException e) { 1757 } 1758 } 1759 mControllerCallbacks.finishBroadcast(); 1760 } 1761 1762 private void sendMetadata(MediaMetadataCompat metadata) { 1763 int size = mControllerCallbacks.beginBroadcast(); 1764 for (int i = size - 1; i >= 0; i--) { 1765 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 1766 try { 1767 cb.onMetadataChanged(metadata); 1768 } catch (RemoteException e) { 1769 } 1770 } 1771 mControllerCallbacks.finishBroadcast(); 1772 } 1773 1774 private void sendQueue(List<QueueItem> queue) { 1775 int size = mControllerCallbacks.beginBroadcast(); 1776 for (int i = size - 1; i >= 0; i--) { 1777 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 1778 try { 1779 cb.onQueueChanged(queue); 1780 } catch (RemoteException e) { 1781 } 1782 } 1783 mControllerCallbacks.finishBroadcast(); 1784 } 1785 1786 private void sendQueueTitle(CharSequence queueTitle) { 1787 int size = mControllerCallbacks.beginBroadcast(); 1788 for (int i = size - 1; i >= 0; i--) { 1789 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 1790 try { 1791 cb.onQueueTitleChanged(queueTitle); 1792 } catch (RemoteException e) { 1793 } 1794 } 1795 mControllerCallbacks.finishBroadcast(); 1796 } 1797 1798 private void sendExtras(Bundle extras) { 1799 int size = mControllerCallbacks.beginBroadcast(); 1800 for (int i = size - 1; i >= 0; i--) { 1801 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 1802 try { 1803 cb.onExtrasChanged(extras); 1804 } catch (RemoteException e) { 1805 } 1806 } 1807 mControllerCallbacks.finishBroadcast(); 1808 } 1809 1810 class MediaSessionStub extends IMediaSession.Stub { 1811 @Override 1812 public void sendCommand(String command, Bundle args, ResultReceiverWrapper cb) { 1813 postToHandler(MessageHandler.MSG_COMMAND, 1814 new Command(command, args, cb.mResultReceiver)); 1815 } 1816 1817 @Override 1818 public boolean sendMediaButton(KeyEvent mediaButton) { 1819 boolean handlesMediaButtons = 1820 (mFlags & MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS) != 0; 1821 if (handlesMediaButtons) { 1822 postToHandler(MessageHandler.MSG_MEDIA_BUTTON, mediaButton); 1823 } 1824 return handlesMediaButtons; 1825 } 1826 1827 @Override 1828 public void registerCallbackListener(IMediaControllerCallback cb) { 1829 // If this session is already destroyed tell the caller and 1830 // don't add them. 1831 if (mDestroyed) { 1832 try { 1833 cb.onSessionDestroyed(); 1834 } catch (Exception e) { 1835 // ignored 1836 } 1837 return; 1838 } 1839 mControllerCallbacks.register(cb); 1840 } 1841 1842 @Override 1843 public void unregisterCallbackListener(IMediaControllerCallback cb) { 1844 mControllerCallbacks.unregister(cb); 1845 } 1846 1847 @Override 1848 public String getPackageName() { 1849 // mPackageName is final so doesn't need synchronize block 1850 return mPackageName; 1851 } 1852 1853 @Override 1854 public String getTag() { 1855 // mTag is final so doesn't need synchronize block 1856 return mTag; 1857 } 1858 1859 @Override 1860 public PendingIntent getLaunchPendingIntent() { 1861 synchronized (mLock) { 1862 return mSessionActivity; 1863 } 1864 } 1865 1866 @Override 1867 @SessionFlags 1868 public long getFlags() { 1869 synchronized (mLock) { 1870 return mFlags; 1871 } 1872 } 1873 1874 @Override 1875 public ParcelableVolumeInfo getVolumeAttributes() { 1876 int controlType; 1877 int max; 1878 int current; 1879 int stream; 1880 int volumeType; 1881 synchronized (mLock) { 1882 volumeType = mVolumeType; 1883 stream = mLocalStream; 1884 VolumeProviderCompat vp = mVolumeProvider; 1885 if (volumeType == MediaControllerCompat.PlaybackInfo.PLAYBACK_TYPE_REMOTE) { 1886 controlType = vp.getVolumeControl(); 1887 max = vp.getMaxVolume(); 1888 current = vp.getCurrentVolume(); 1889 } else { 1890 controlType = VolumeProviderCompat.VOLUME_CONTROL_ABSOLUTE; 1891 max = mAudioManager.getStreamMaxVolume(stream); 1892 current = mAudioManager.getStreamVolume(stream); 1893 } 1894 } 1895 return new ParcelableVolumeInfo(volumeType, stream, controlType, max, current); 1896 } 1897 1898 @Override 1899 public void adjustVolume(int direction, int flags, String packageName) { 1900 MediaSessionImplBase.this.adjustVolume(direction, flags); 1901 } 1902 1903 @Override 1904 public void setVolumeTo(int value, int flags, String packageName) { 1905 MediaSessionImplBase.this.setVolumeTo(value, flags); 1906 } 1907 1908 @Override 1909 public void prepare() throws RemoteException { 1910 postToHandler(MessageHandler.MSG_PREPARE); 1911 } 1912 1913 @Override 1914 public void prepareFromMediaId(String mediaId, Bundle extras) throws RemoteException { 1915 postToHandler(MessageHandler.MSG_PREPARE_MEDIA_ID, mediaId, extras); 1916 } 1917 1918 @Override 1919 public void prepareFromSearch(String query, Bundle extras) throws RemoteException { 1920 postToHandler(MessageHandler.MSG_PREPARE_SEARCH, query, extras); 1921 } 1922 1923 @Override 1924 public void prepareFromUri(Uri uri, Bundle extras) throws RemoteException { 1925 postToHandler(MessageHandler.MSG_PREPARE_URI, uri, extras); 1926 } 1927 1928 @Override 1929 public void play() throws RemoteException { 1930 postToHandler(MessageHandler.MSG_PLAY); 1931 } 1932 1933 @Override 1934 public void playFromMediaId(String mediaId, Bundle extras) throws RemoteException { 1935 postToHandler(MessageHandler.MSG_PLAY_MEDIA_ID, mediaId, extras); 1936 } 1937 1938 @Override 1939 public void playFromSearch(String query, Bundle extras) throws RemoteException { 1940 postToHandler(MessageHandler.MSG_PLAY_SEARCH, query, extras); 1941 } 1942 1943 @Override 1944 public void playFromUri(Uri uri, Bundle extras) throws RemoteException { 1945 postToHandler(MessageHandler.MSG_PLAY_URI, uri, extras); 1946 } 1947 1948 @Override 1949 public void skipToQueueItem(long id) { 1950 postToHandler(MessageHandler.MSG_SKIP_TO_ITEM, id); 1951 } 1952 1953 @Override 1954 public void pause() throws RemoteException { 1955 postToHandler(MessageHandler.MSG_PAUSE); 1956 } 1957 1958 @Override 1959 public void stop() throws RemoteException { 1960 postToHandler(MessageHandler.MSG_STOP); 1961 } 1962 1963 @Override 1964 public void next() throws RemoteException { 1965 postToHandler(MessageHandler.MSG_NEXT); 1966 } 1967 1968 @Override 1969 public void previous() throws RemoteException { 1970 postToHandler(MessageHandler.MSG_PREVIOUS); 1971 } 1972 1973 @Override 1974 public void fastForward() throws RemoteException { 1975 postToHandler(MessageHandler.MSG_FAST_FORWARD); 1976 } 1977 1978 @Override 1979 public void rewind() throws RemoteException { 1980 postToHandler(MessageHandler.MSG_REWIND); 1981 } 1982 1983 @Override 1984 public void seekTo(long pos) throws RemoteException { 1985 postToHandler(MessageHandler.MSG_SEEK_TO, pos); 1986 } 1987 1988 @Override 1989 public void rate(RatingCompat rating) throws RemoteException { 1990 postToHandler(MessageHandler.MSG_RATE, rating); 1991 } 1992 1993 @Override 1994 public void sendCustomAction(String action, Bundle args) 1995 throws RemoteException { 1996 postToHandler(MessageHandler.MSG_CUSTOM_ACTION, action, args); 1997 } 1998 1999 @Override 2000 public MediaMetadataCompat getMetadata() { 2001 return mMetadata; 2002 } 2003 2004 @Override 2005 public PlaybackStateCompat getPlaybackState() { 2006 return getStateWithUpdatedPosition(); 2007 } 2008 2009 @Override 2010 public List<QueueItem> getQueue() { 2011 synchronized (mLock) { 2012 return mQueue; 2013 } 2014 } 2015 2016 @Override 2017 public CharSequence getQueueTitle() { 2018 return mQueueTitle; 2019 } 2020 2021 @Override 2022 public Bundle getExtras() { 2023 synchronized (mLock) { 2024 return mExtras; 2025 } 2026 } 2027 2028 @Override 2029 @RatingCompat.Style 2030 public int getRatingType() { 2031 return mRatingType; 2032 } 2033 2034 @Override 2035 public boolean isTransportControlEnabled() { 2036 return (mFlags & FLAG_HANDLES_TRANSPORT_CONTROLS) != 0; 2037 } 2038 } 2039 2040 private static final class Command { 2041 public final String command; 2042 public final Bundle extras; 2043 public final ResultReceiver stub; 2044 2045 public Command(String command, Bundle extras, ResultReceiver stub) { 2046 this.command = command; 2047 this.extras = extras; 2048 this.stub = stub; 2049 } 2050 } 2051 2052 private class MessageHandler extends Handler { 2053 2054 private static final int MSG_COMMAND = 1; 2055 private static final int MSG_ADJUST_VOLUME = 2; 2056 private static final int MSG_PREPARE = 3; 2057 private static final int MSG_PREPARE_MEDIA_ID = 4; 2058 private static final int MSG_PREPARE_SEARCH = 5; 2059 private static final int MSG_PREPARE_URI = 6; 2060 private static final int MSG_PLAY = 7; 2061 private static final int MSG_PLAY_MEDIA_ID = 8; 2062 private static final int MSG_PLAY_SEARCH = 9; 2063 private static final int MSG_PLAY_URI = 10; 2064 private static final int MSG_SKIP_TO_ITEM = 11; 2065 private static final int MSG_PAUSE = 12; 2066 private static final int MSG_STOP = 13; 2067 private static final int MSG_NEXT = 14; 2068 private static final int MSG_PREVIOUS = 15; 2069 private static final int MSG_FAST_FORWARD = 16; 2070 private static final int MSG_REWIND = 17; 2071 private static final int MSG_SEEK_TO = 18; 2072 private static final int MSG_RATE = 19; 2073 private static final int MSG_CUSTOM_ACTION = 20; 2074 private static final int MSG_MEDIA_BUTTON = 21; 2075 private static final int MSG_SET_VOLUME = 22; 2076 2077 // KeyEvent constants only available on API 11+ 2078 private static final int KEYCODE_MEDIA_PAUSE = 127; 2079 private static final int KEYCODE_MEDIA_PLAY = 126; 2080 2081 public MessageHandler(Looper looper) { 2082 super(looper); 2083 } 2084 2085 public void post(int what, Object obj, Bundle bundle) { 2086 Message msg = obtainMessage(what, obj); 2087 msg.setData(bundle); 2088 msg.sendToTarget(); 2089 } 2090 2091 public void post(int what, Object obj) { 2092 obtainMessage(what, obj).sendToTarget(); 2093 } 2094 2095 public void post(int what) { 2096 post(what, null); 2097 } 2098 2099 public void post(int what, Object obj, int arg1) { 2100 obtainMessage(what, arg1, 0, obj).sendToTarget(); 2101 } 2102 2103 @Override 2104 public void handleMessage(Message msg) { 2105 MediaSessionCompat.Callback cb = mCallback; 2106 if (cb == null) { 2107 return; 2108 } 2109 switch (msg.what) { 2110 case MSG_COMMAND: 2111 Command cmd = (Command) msg.obj; 2112 cb.onCommand(cmd.command, cmd.extras, cmd.stub); 2113 break; 2114 case MSG_MEDIA_BUTTON: 2115 KeyEvent keyEvent = (KeyEvent) msg.obj; 2116 Intent intent = new Intent(Intent.ACTION_MEDIA_BUTTON); 2117 intent.putExtra(Intent.EXTRA_KEY_EVENT, keyEvent); 2118 // Let the Callback handle events first before using the default behavior 2119 if (!cb.onMediaButtonEvent(intent)) { 2120 onMediaButtonEvent(keyEvent, cb); 2121 } 2122 break; 2123 case MSG_PREPARE: 2124 cb.onPrepare(); 2125 break; 2126 case MSG_PREPARE_MEDIA_ID: 2127 cb.onPrepareFromMediaId((String) msg.obj, msg.getData()); 2128 break; 2129 case MSG_PREPARE_SEARCH: 2130 cb.onPrepareFromSearch((String) msg.obj, msg.getData()); 2131 break; 2132 case MSG_PREPARE_URI: 2133 cb.onPrepareFromUri((Uri) msg.obj, msg.getData()); 2134 break; 2135 case MSG_PLAY: 2136 cb.onPlay(); 2137 break; 2138 case MSG_PLAY_MEDIA_ID: 2139 cb.onPlayFromMediaId((String) msg.obj, msg.getData()); 2140 break; 2141 case MSG_PLAY_SEARCH: 2142 cb.onPlayFromSearch((String) msg.obj, msg.getData()); 2143 break; 2144 case MSG_PLAY_URI: 2145 cb.onPlayFromUri((Uri) msg.obj, msg.getData()); 2146 break; 2147 case MSG_SKIP_TO_ITEM: 2148 cb.onSkipToQueueItem((Long) msg.obj); 2149 break; 2150 case MSG_PAUSE: 2151 cb.onPause(); 2152 break; 2153 case MSG_STOP: 2154 cb.onStop(); 2155 break; 2156 case MSG_NEXT: 2157 cb.onSkipToNext(); 2158 break; 2159 case MSG_PREVIOUS: 2160 cb.onSkipToPrevious(); 2161 break; 2162 case MSG_FAST_FORWARD: 2163 cb.onFastForward(); 2164 break; 2165 case MSG_REWIND: 2166 cb.onRewind(); 2167 break; 2168 case MSG_SEEK_TO: 2169 cb.onSeekTo((Long) msg.obj); 2170 break; 2171 case MSG_RATE: 2172 cb.onSetRating((RatingCompat) msg.obj); 2173 break; 2174 case MSG_CUSTOM_ACTION: 2175 cb.onCustomAction((String) msg.obj, msg.getData()); 2176 break; 2177 case MSG_ADJUST_VOLUME: 2178 adjustVolume((int) msg.obj, 0); 2179 break; 2180 case MSG_SET_VOLUME: 2181 setVolumeTo((int) msg.obj, 0); 2182 break; 2183 } 2184 } 2185 2186 private void onMediaButtonEvent(KeyEvent ke, MediaSessionCompat.Callback cb) { 2187 if (ke == null || ke.getAction() != KeyEvent.ACTION_DOWN) { 2188 return; 2189 } 2190 long validActions = mState == null ? 0 : mState.getActions(); 2191 switch (ke.getKeyCode()) { 2192 // Note KeyEvent.KEYCODE_MEDIA_PLAY is API 11+ 2193 case KEYCODE_MEDIA_PLAY: 2194 if ((validActions & PlaybackStateCompat.ACTION_PLAY) != 0) { 2195 cb.onPlay(); 2196 } 2197 break; 2198 // Note KeyEvent.KEYCODE_MEDIA_PAUSE is API 11+ 2199 case KEYCODE_MEDIA_PAUSE: 2200 if ((validActions & PlaybackStateCompat.ACTION_PAUSE) != 0) { 2201 cb.onPause(); 2202 } 2203 break; 2204 case KeyEvent.KEYCODE_MEDIA_NEXT: 2205 if ((validActions & PlaybackStateCompat.ACTION_SKIP_TO_NEXT) != 0) { 2206 cb.onSkipToNext(); 2207 } 2208 break; 2209 case KeyEvent.KEYCODE_MEDIA_PREVIOUS: 2210 if ((validActions & PlaybackStateCompat.ACTION_SKIP_TO_PREVIOUS) != 0) { 2211 cb.onSkipToPrevious(); 2212 } 2213 break; 2214 case KeyEvent.KEYCODE_MEDIA_STOP: 2215 if ((validActions & PlaybackStateCompat.ACTION_STOP) != 0) { 2216 cb.onStop(); 2217 } 2218 break; 2219 case KeyEvent.KEYCODE_MEDIA_FAST_FORWARD: 2220 if ((validActions & PlaybackStateCompat.ACTION_FAST_FORWARD) != 0) { 2221 cb.onFastForward(); 2222 } 2223 break; 2224 case KeyEvent.KEYCODE_MEDIA_REWIND: 2225 if ((validActions & PlaybackStateCompat.ACTION_REWIND) != 0) { 2226 cb.onRewind(); 2227 } 2228 break; 2229 case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE: 2230 case KeyEvent.KEYCODE_HEADSETHOOK: 2231 boolean isPlaying = mState != null 2232 && mState.getState() == PlaybackStateCompat.STATE_PLAYING; 2233 boolean canPlay = (validActions & (PlaybackStateCompat.ACTION_PLAY_PAUSE 2234 | PlaybackStateCompat.ACTION_PLAY)) != 0; 2235 boolean canPause = (validActions & (PlaybackStateCompat.ACTION_PLAY_PAUSE 2236 | PlaybackStateCompat.ACTION_PAUSE)) != 0; 2237 if (isPlaying && canPause) { 2238 cb.onPause(); 2239 } else if (!isPlaying && canPlay) { 2240 cb.onPlay(); 2241 } 2242 break; 2243 } 2244 } 2245 } 2246 } 2247 2248 static class MediaSessionImplApi21 implements MediaSessionImpl { 2249 private final Object mSessionObj; 2250 private final Token mToken; 2251 2252 private PendingIntent mMediaButtonIntent; 2253 2254 public MediaSessionImplApi21(Context context, String tag) { 2255 mSessionObj = MediaSessionCompatApi21.createSession(context, tag); 2256 mToken = new Token(MediaSessionCompatApi21.getSessionToken(mSessionObj)); 2257 } 2258 2259 public MediaSessionImplApi21(Object mediaSession) { 2260 mSessionObj = MediaSessionCompatApi21.verifySession(mediaSession); 2261 mToken = new Token(MediaSessionCompatApi21.getSessionToken(mSessionObj)); 2262 } 2263 2264 @Override 2265 public void setCallback(Callback callback, Handler handler) { 2266 MediaSessionCompatApi21.setCallback(mSessionObj, 2267 callback == null ? null : callback.mCallbackObj, handler); 2268 } 2269 2270 @Override 2271 public void setFlags(@SessionFlags int flags) { 2272 MediaSessionCompatApi21.setFlags(mSessionObj, flags); 2273 } 2274 2275 @Override 2276 public void setPlaybackToLocal(int stream) { 2277 MediaSessionCompatApi21.setPlaybackToLocal(mSessionObj, stream); 2278 } 2279 2280 @Override 2281 public void setPlaybackToRemote(VolumeProviderCompat volumeProvider) { 2282 MediaSessionCompatApi21.setPlaybackToRemote(mSessionObj, 2283 volumeProvider.getVolumeProvider()); 2284 } 2285 2286 @Override 2287 public void setActive(boolean active) { 2288 MediaSessionCompatApi21.setActive(mSessionObj, active); 2289 } 2290 2291 @Override 2292 public boolean isActive() { 2293 return MediaSessionCompatApi21.isActive(mSessionObj); 2294 } 2295 2296 @Override 2297 public void sendSessionEvent(String event, Bundle extras) { 2298 MediaSessionCompatApi21.sendSessionEvent(mSessionObj, event, extras); 2299 } 2300 2301 @Override 2302 public void release() { 2303 MediaSessionCompatApi21.release(mSessionObj); 2304 } 2305 2306 @Override 2307 public Token getSessionToken() { 2308 return mToken; 2309 } 2310 2311 @Override 2312 public void setPlaybackState(PlaybackStateCompat state) { 2313 MediaSessionCompatApi21.setPlaybackState(mSessionObj, 2314 state == null ? null : state.getPlaybackState()); 2315 } 2316 2317 @Override 2318 public void setMetadata(MediaMetadataCompat metadata) { 2319 MediaSessionCompatApi21.setMetadata(mSessionObj, 2320 metadata == null ? null : metadata.getMediaMetadata()); 2321 } 2322 2323 @Override 2324 public void setSessionActivity(PendingIntent pi) { 2325 MediaSessionCompatApi21.setSessionActivity(mSessionObj, pi); 2326 } 2327 2328 @Override 2329 public void setMediaButtonReceiver(PendingIntent mbr) { 2330 mMediaButtonIntent = mbr; 2331 MediaSessionCompatApi21.setMediaButtonReceiver(mSessionObj, mbr); 2332 } 2333 2334 @Override 2335 public void setQueue(List<QueueItem> queue) { 2336 List<Object> queueObjs = null; 2337 if (queue != null) { 2338 queueObjs = new ArrayList<>(); 2339 for (QueueItem item : queue) { 2340 queueObjs.add(item.getQueueItem()); 2341 } 2342 } 2343 MediaSessionCompatApi21.setQueue(mSessionObj, queueObjs); 2344 } 2345 2346 @Override 2347 public void setQueueTitle(CharSequence title) { 2348 MediaSessionCompatApi21.setQueueTitle(mSessionObj, title); 2349 } 2350 2351 @Override 2352 public void setRatingType(@RatingCompat.Style int type) { 2353 if (android.os.Build.VERSION.SDK_INT < 22) { 2354 // TODO figure out 21 implementation 2355 } else { 2356 MediaSessionCompatApi22.setRatingType(mSessionObj, type); 2357 } 2358 } 2359 2360 @Override 2361 public void setExtras(Bundle extras) { 2362 MediaSessionCompatApi21.setExtras(mSessionObj, extras); 2363 } 2364 2365 @Override 2366 public Object getMediaSession() { 2367 return mSessionObj; 2368 } 2369 2370 @Override 2371 public Object getRemoteControlClient() { 2372 return null; 2373 } 2374 2375 @Override 2376 public String getCallingPackage() { 2377 if (android.os.Build.VERSION.SDK_INT < 24) { 2378 return null; 2379 } else { 2380 return MediaSessionCompatApi24.getCallingPackage(mSessionObj); 2381 } 2382 } 2383 } 2384} 2385