MediaSessionCompat.java revision 45d3353a50ce66776a774d808a34e2c47f8ee8a1
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 static android.support.annotation.RestrictTo.Scope.LIBRARY_GROUP; 21 22import android.app.Activity; 23import android.app.PendingIntent; 24import android.content.BroadcastReceiver; 25import android.content.ComponentName; 26import android.content.Context; 27import android.content.Intent; 28import android.media.AudioManager; 29import android.net.Uri; 30import android.os.Build; 31import android.os.Bundle; 32import android.os.Handler; 33import android.os.IBinder; 34import android.os.Looper; 35import android.os.Message; 36import android.os.Parcel; 37import android.os.Parcelable; 38import android.os.RemoteCallbackList; 39import android.os.RemoteException; 40import android.os.ResultReceiver; 41import android.os.SystemClock; 42import android.support.annotation.IntDef; 43import android.support.annotation.RestrictTo; 44import android.support.v4.app.BundleCompat; 45import android.support.v4.media.MediaDescriptionCompat; 46import android.support.v4.media.MediaMetadataCompat; 47import android.support.v4.media.RatingCompat; 48import android.support.v4.media.VolumeProviderCompat; 49import android.text.TextUtils; 50import android.util.Log; 51import android.util.TypedValue; 52import android.view.KeyEvent; 53 54import java.lang.annotation.Retention; 55import java.lang.annotation.RetentionPolicy; 56import java.lang.ref.WeakReference; 57import java.util.ArrayList; 58import java.util.List; 59 60/** 61 * Allows interaction with media controllers, volume keys, media buttons, and 62 * transport controls. 63 * <p> 64 * A MediaSession should be created when an app wants to publish media playback 65 * information or handle media keys. In general an app only needs one session 66 * for all playback, though multiple sessions can be created to provide finer 67 * grain controls of media. 68 * <p> 69 * Once a session is created the owner of the session may pass its 70 * {@link #getSessionToken() session token} to other processes to allow them to 71 * create a {@link MediaControllerCompat} to interact with the session. 72 * <p> 73 * To receive commands, media keys, and other events a {@link Callback} must be 74 * set with {@link #setCallback(Callback)}. 75 * <p> 76 * When an app is finished performing playback it must call {@link #release()} 77 * to clean up the session and notify any controllers. 78 * <p> 79 * MediaSessionCompat objects are not thread safe and all calls should be made 80 * from the same thread. 81 * <p> 82 * This is a helper for accessing features in 83 * {@link android.media.session.MediaSession} introduced after API level 4 in a 84 * backwards compatible fashion. 85 */ 86public class MediaSessionCompat { 87 static final String TAG = "MediaSessionCompat"; 88 89 private final MediaSessionImpl mImpl; 90 private final MediaControllerCompat mController; 91 private final ArrayList<OnActiveChangeListener> mActiveListeners = new ArrayList<>(); 92 93 /** 94 * @hide 95 */ 96 @RestrictTo(LIBRARY_GROUP) 97 @IntDef(flag=true, value={ 98 FLAG_HANDLES_MEDIA_BUTTONS, 99 FLAG_HANDLES_TRANSPORT_CONTROLS, 100 FLAG_HANDLES_QUEUE_COMMANDS }) 101 @Retention(RetentionPolicy.SOURCE) 102 public @interface SessionFlags {} 103 104 /** 105 * Set this flag on the session to indicate that it can handle media button 106 * events. 107 */ 108 public static final int FLAG_HANDLES_MEDIA_BUTTONS = 1 << 0; 109 110 /** 111 * Set this flag on the session to indicate that it handles transport 112 * control commands through its {@link Callback}. 113 */ 114 public static final int FLAG_HANDLES_TRANSPORT_CONTROLS = 1 << 1; 115 116 /** 117 * Set this flag on the session to indicate that it handles queue 118 * management commands through its {@link Callback}. 119 */ 120 public static final int FLAG_HANDLES_QUEUE_COMMANDS = 1 << 2; 121 122 /** 123 * Custom action to invoke playFromUri() for the forward compatibility. 124 */ 125 static final String ACTION_PLAY_FROM_URI = 126 "android.support.v4.media.session.action.PLAY_FROM_URI"; 127 128 /** 129 * Custom action to invoke prepare() for the forward compatibility. 130 */ 131 static final String ACTION_PREPARE = "android.support.v4.media.session.action.PREPARE"; 132 133 /** 134 * Custom action to invoke prepareFromMediaId() for the forward compatibility. 135 */ 136 static final String ACTION_PREPARE_FROM_MEDIA_ID = 137 "android.support.v4.media.session.action.PREPARE_FROM_MEDIA_ID"; 138 139 /** 140 * Custom action to invoke prepareFromSearch() for the forward compatibility. 141 */ 142 static final String ACTION_PREPARE_FROM_SEARCH = 143 "android.support.v4.media.session.action.PREPARE_FROM_SEARCH"; 144 145 /** 146 * Custom action to invoke prepareFromUri() for the forward compatibility. 147 */ 148 static final String ACTION_PREPARE_FROM_URI = 149 "android.support.v4.media.session.action.PREPARE_FROM_URI"; 150 151 /** 152 * Custom action to invoke setRepeatMode() for the forward compatibility. 153 */ 154 static final String ACTION_SET_REPEAT_MODE = 155 "android.support.v4.media.session.action.SET_REPEAT_MODE"; 156 157 /** 158 * Custom action to invoke setShuffleModeEnabled() for the forward compatibility. 159 */ 160 static final String ACTION_SET_SHUFFLE_MODE_ENABLED = 161 "android.support.v4.media.session.action.SET_SHUFFLE_MODE_ENABLED"; 162 163 /** 164 * Argument for use with {@link #ACTION_PREPARE_FROM_MEDIA_ID} indicating media id to play. 165 */ 166 static final String ACTION_ARGUMENT_MEDIA_ID = 167 "android.support.v4.media.session.action.ARGUMENT_MEDIA_ID"; 168 169 /** 170 * Argument for use with {@link #ACTION_PREPARE_FROM_SEARCH} indicating search query. 171 */ 172 static final String ACTION_ARGUMENT_QUERY = 173 "android.support.v4.media.session.action.ARGUMENT_QUERY"; 174 175 /** 176 * Argument for use with {@link #ACTION_PREPARE_FROM_URI} and {@link #ACTION_PLAY_FROM_URI} 177 * indicating URI to play. 178 */ 179 static final String ACTION_ARGUMENT_URI = 180 "android.support.v4.media.session.action.ARGUMENT_URI"; 181 182 /** 183 * Argument for use with various actions indicating extra bundle. 184 */ 185 static final String ACTION_ARGUMENT_EXTRAS = 186 "android.support.v4.media.session.action.ARGUMENT_EXTRAS"; 187 188 /** 189 * Argument for use with {@link #ACTION_SET_REPEAT_MODE} indicating repeat mode. 190 */ 191 static final String ACTION_ARGUMENT_REPEAT_MODE = 192 "android.support.v4.media.session.action.ARGUMENT_REPEAT_MODE"; 193 194 /** 195 * Argument for use with {@link #ACTION_SET_SHUFFLE_MODE_ENABLED} indicating that shuffle mode 196 * is enabled. 197 */ 198 static final String ACTION_ARGUMENT_SHUFFLE_MODE_ENABLED = 199 "android.support.v4.media.session.action.ARGUMENT_SHUFFLE_MODE_ENABLED"; 200 201 static final String EXTRA_BINDER = "android.support.v4.media.session.EXTRA_BINDER"; 202 203 // Maximum size of the bitmap in dp. 204 private static final int MAX_BITMAP_SIZE_IN_DP = 320; 205 206 // Maximum size of the bitmap in px. It shouldn't be changed. 207 static int sMaxBitmapSize; 208 209 /** 210 * Creates a new session. You must call {@link #release()} when finished with the session. 211 * <p> 212 * The session will automatically be registered with the system but will not be published 213 * until {@link #setActive(boolean) setActive(true)} is called. 214 * </p><p> 215 * For API 20 or earlier, note that a media button receiver is required for handling 216 * {@link Intent#ACTION_MEDIA_BUTTON}. This constructor will attempt to find an appropriate 217 * {@link BroadcastReceiver} from your manifest. See {@link MediaButtonReceiver} for more 218 * details. 219 * </p> 220 * @param context The context to use to create the session. 221 * @param tag A short name for debugging purposes. 222 */ 223 public MediaSessionCompat(Context context, String tag) { 224 this(context, tag, null, null); 225 } 226 227 /** 228 * Creates a new session with a specified media button receiver (a component name and/or 229 * a pending intent). You must call {@link #release()} when finished with the session. 230 * <p> 231 * The session will automatically be registered with the system but will not be published 232 * until {@link #setActive(boolean) setActive(true)} is called. 233 * </p><p> 234 * For API 20 or earlier, note that a media button receiver is required for handling 235 * {@link Intent#ACTION_MEDIA_BUTTON}. This constructor will attempt to find an appropriate 236 * {@link BroadcastReceiver} from your manifest if it's not specified. See 237 * {@link MediaButtonReceiver} for more details. 238 * </p> 239 * @param context The context to use to create the session. 240 * @param tag A short name for debugging purposes. 241 * @param mbrComponent The component name for your media button receiver. 242 * @param mbrIntent The PendingIntent for your receiver component that handles 243 * media button events. This is optional and will be used on between 244 * {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2} and 245 * {@link android.os.Build.VERSION_CODES#KITKAT_WATCH} instead of the 246 * component name. 247 */ 248 public MediaSessionCompat(Context context, String tag, ComponentName mbrComponent, 249 PendingIntent mbrIntent) { 250 if (context == null) { 251 throw new IllegalArgumentException("context must not be null"); 252 } 253 if (TextUtils.isEmpty(tag)) { 254 throw new IllegalArgumentException("tag must not be null or empty"); 255 } 256 257 if (mbrComponent == null) { 258 mbrComponent = MediaButtonReceiver.getMediaButtonReceiverComponent(context); 259 if (mbrComponent == null) { 260 Log.w(TAG, "Couldn't find a unique registered media button receiver in the " 261 + "given context."); 262 } 263 } 264 if (mbrComponent != null && mbrIntent == null) { 265 // construct a PendingIntent for the media button 266 Intent mediaButtonIntent = new Intent(Intent.ACTION_MEDIA_BUTTON); 267 // the associated intent will be handled by the component being registered 268 mediaButtonIntent.setComponent(mbrComponent); 269 mbrIntent = PendingIntent.getBroadcast(context, 270 0/* requestCode, ignored */, mediaButtonIntent, 0/* flags */); 271 } 272 if (android.os.Build.VERSION.SDK_INT >= 21) { 273 mImpl = new MediaSessionImplApi21(context, tag); 274 mImpl.setMediaButtonReceiver(mbrIntent); 275 // Set default callback to respond to controllers' extra binder requests. 276 setCallback(new Callback() {}); 277 } else { 278 mImpl = new MediaSessionImplBase(context, tag, mbrComponent, mbrIntent); 279 } 280 mController = new MediaControllerCompat(context, this); 281 282 if (sMaxBitmapSize == 0) { 283 sMaxBitmapSize = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 284 MAX_BITMAP_SIZE_IN_DP, context.getResources().getDisplayMetrics()); 285 } 286 } 287 288 private MediaSessionCompat(Context context, MediaSessionImpl impl) { 289 mImpl = impl; 290 if (android.os.Build.VERSION.SDK_INT >= 21) { 291 // Set default callback to respond to controllers' extra binder requests. 292 setCallback(new Callback() {}); 293 } 294 mController = new MediaControllerCompat(context, this); 295 } 296 297 /** 298 * Add a callback to receive updates on for the MediaSession. This includes 299 * media button and volume events. The caller's thread will be used to post 300 * events. 301 * 302 * @param callback The callback object 303 */ 304 public void setCallback(Callback callback) { 305 setCallback(callback, null); 306 } 307 308 /** 309 * Set the callback to receive updates for the MediaSession. This includes 310 * media button and volume events. Set the callback to null to stop 311 * receiving events. 312 * 313 * @param callback The callback to receive updates on. 314 * @param handler The handler that events should be posted on. 315 */ 316 public void setCallback(Callback callback, Handler handler) { 317 mImpl.setCallback(callback, handler != null ? handler : new Handler()); 318 } 319 320 /** 321 * Set an intent for launching UI for this Session. This can be used as a 322 * quick link to an ongoing media screen. The intent should be for an 323 * activity that may be started using 324 * {@link Activity#startActivity(Intent)}. 325 * 326 * @param pi The intent to launch to show UI for this Session. 327 */ 328 public void setSessionActivity(PendingIntent pi) { 329 mImpl.setSessionActivity(pi); 330 } 331 332 /** 333 * Set a pending intent for your media button receiver to allow restarting 334 * playback after the session has been stopped. If your app is started in 335 * this way an {@link Intent#ACTION_MEDIA_BUTTON} intent will be sent via 336 * the pending intent. 337 * <p> 338 * This method will only work on 339 * {@link android.os.Build.VERSION_CODES#LOLLIPOP} and later. Earlier 340 * platform versions must include the media button receiver in the 341 * constructor. 342 * 343 * @param mbr The {@link PendingIntent} to send the media button event to. 344 */ 345 public void setMediaButtonReceiver(PendingIntent mbr) { 346 mImpl.setMediaButtonReceiver(mbr); 347 } 348 349 /** 350 * Set any flags for the session. 351 * 352 * @param flags The flags to set for this session. 353 */ 354 public void setFlags(@SessionFlags int flags) { 355 mImpl.setFlags(flags); 356 } 357 358 /** 359 * Set the stream this session is playing on. This will affect the system's 360 * volume handling for this session. If {@link #setPlaybackToRemote} was 361 * previously called it will stop receiving volume commands and the system 362 * will begin sending volume changes to the appropriate stream. 363 * <p> 364 * By default sessions are on {@link AudioManager#STREAM_MUSIC}. 365 * 366 * @param stream The {@link AudioManager} stream this session is playing on. 367 */ 368 public void setPlaybackToLocal(int stream) { 369 mImpl.setPlaybackToLocal(stream); 370 } 371 372 /** 373 * Configure this session to use remote volume handling. This must be called 374 * to receive volume button events, otherwise the system will adjust the 375 * current stream volume for this session. If {@link #setPlaybackToLocal} 376 * was previously called that stream will stop receiving volume changes for 377 * this session. 378 * <p> 379 * On platforms earlier than {@link android.os.Build.VERSION_CODES#LOLLIPOP} 380 * this will only allow an app to handle volume commands sent directly to 381 * the session by a {@link MediaControllerCompat}. System routing of volume 382 * keys will not use the volume provider. 383 * 384 * @param volumeProvider The provider that will handle volume changes. May 385 * not be null. 386 */ 387 public void setPlaybackToRemote(VolumeProviderCompat volumeProvider) { 388 if (volumeProvider == null) { 389 throw new IllegalArgumentException("volumeProvider may not be null!"); 390 } 391 mImpl.setPlaybackToRemote(volumeProvider); 392 } 393 394 /** 395 * Set if this session is currently active and ready to receive commands. If 396 * set to false your session's controller may not be discoverable. You must 397 * set the session to active before it can start receiving media button 398 * events or transport commands. 399 * <p> 400 * On platforms earlier than 401 * {@link android.os.Build.VERSION_CODES#LOLLIPOP}, 402 * a media button event receiver should be set via the constructor to 403 * receive media button events. 404 * 405 * @param active Whether this session is active or not. 406 */ 407 public void setActive(boolean active) { 408 mImpl.setActive(active); 409 for (OnActiveChangeListener listener : mActiveListeners) { 410 listener.onActiveChanged(); 411 } 412 } 413 414 /** 415 * Get the current active state of this session. 416 * 417 * @return True if the session is active, false otherwise. 418 */ 419 public boolean isActive() { 420 return mImpl.isActive(); 421 } 422 423 /** 424 * Send a proprietary event to all MediaControllers listening to this 425 * Session. It's up to the Controller/Session owner to determine the meaning 426 * of any events. 427 * 428 * @param event The name of the event to send 429 * @param extras Any extras included with the event 430 */ 431 public void sendSessionEvent(String event, Bundle extras) { 432 if (TextUtils.isEmpty(event)) { 433 throw new IllegalArgumentException("event cannot be null or empty"); 434 } 435 mImpl.sendSessionEvent(event, extras); 436 } 437 438 /** 439 * This must be called when an app has finished performing playback. If 440 * playback is expected to start again shortly the session can be left open, 441 * but it must be released if your activity or service is being destroyed. 442 */ 443 public void release() { 444 mImpl.release(); 445 } 446 447 /** 448 * Retrieve a token object that can be used by apps to create a 449 * {@link MediaControllerCompat} for interacting with this session. The 450 * owner of the session is responsible for deciding how to distribute these 451 * tokens. 452 * <p> 453 * On platform versions before 454 * {@link android.os.Build.VERSION_CODES#LOLLIPOP} this token may only be 455 * used within your app as there is no way to guarantee other apps are using 456 * the same version of the support library. 457 * 458 * @return A token that can be used to create a media controller for this 459 * session. 460 */ 461 public Token getSessionToken() { 462 return mImpl.getSessionToken(); 463 } 464 465 /** 466 * Get a controller for this session. This is a convenience method to avoid 467 * having to cache your own controller in process. 468 * 469 * @return A controller for this session. 470 */ 471 public MediaControllerCompat getController() { 472 return mController; 473 } 474 475 /** 476 * Update the current playback state. 477 * 478 * @param state The current state of playback 479 */ 480 public void setPlaybackState(PlaybackStateCompat state) { 481 mImpl.setPlaybackState(state); 482 } 483 484 /** 485 * Update the current metadata. New metadata can be created using 486 * {@link android.support.v4.media.MediaMetadataCompat.Builder}. This operation may take time 487 * proportional to the size of the bitmap to replace large bitmaps with a scaled down copy. 488 * 489 * @param metadata The new metadata 490 * @see android.support.v4.media.MediaMetadataCompat.Builder#putBitmap 491 */ 492 public void setMetadata(MediaMetadataCompat metadata) { 493 mImpl.setMetadata(metadata); 494 } 495 496 /** 497 * Update the list of items in the play queue. It is an ordered list and 498 * should contain the current item, and previous or upcoming items if they 499 * exist. Specify null if there is no current play queue. 500 * <p> 501 * The queue should be of reasonable size. If the play queue is unbounded 502 * within your app, it is better to send a reasonable amount in a sliding 503 * window instead. 504 * 505 * @param queue A list of items in the play queue. 506 */ 507 public void setQueue(List<QueueItem> queue) { 508 mImpl.setQueue(queue); 509 } 510 511 /** 512 * Set the title of the play queue. The UI should display this title along 513 * with the play queue itself. e.g. "Play Queue", "Now Playing", or an album 514 * name. 515 * 516 * @param title The title of the play queue. 517 */ 518 public void setQueueTitle(CharSequence title) { 519 mImpl.setQueueTitle(title); 520 } 521 522 /** 523 * Set the style of rating used by this session. Apps trying to set the 524 * rating should use this style. Must be one of the following: 525 * <ul> 526 * <li>{@link RatingCompat#RATING_NONE}</li> 527 * <li>{@link RatingCompat#RATING_3_STARS}</li> 528 * <li>{@link RatingCompat#RATING_4_STARS}</li> 529 * <li>{@link RatingCompat#RATING_5_STARS}</li> 530 * <li>{@link RatingCompat#RATING_HEART}</li> 531 * <li>{@link RatingCompat#RATING_PERCENTAGE}</li> 532 * <li>{@link RatingCompat#RATING_THUMB_UP_DOWN}</li> 533 * </ul> 534 */ 535 public void setRatingType(@RatingCompat.Style int type) { 536 mImpl.setRatingType(type); 537 } 538 539 /** 540 * Set the repeat mode for this session. 541 * <p> 542 * Note that if this method is not called before, {@link MediaControllerCompat#getRepeatMode} 543 * will return {@link PlaybackStateCompat#REPEAT_MODE_NONE}. 544 * 545 * @param repeatMode The repeat mode. Must be one of the followings: 546 * {@link PlaybackStateCompat#REPEAT_MODE_NONE}, 547 * {@link PlaybackStateCompat#REPEAT_MODE_ONE}, 548 * {@link PlaybackStateCompat#REPEAT_MODE_ALL} 549 */ 550 public void setRepeatMode(@PlaybackStateCompat.RepeatMode int repeatMode) { 551 mImpl.setRepeatMode(repeatMode); 552 } 553 554 /** 555 * Set the shuffle mode for this session. 556 * <p> 557 * Note that if this method is not called before, 558 * {@link MediaControllerCompat#isShuffleModeEnabled} will return {@code false}. 559 * 560 * @param enabled {@code true} to enable the shuffle mode, {@code false} to disable. 561 */ 562 public void setShuffleModeEnabled(boolean enabled) { 563 mImpl.setShuffleModeEnabled(enabled); 564 } 565 566 /** 567 * Set some extras that can be associated with the 568 * {@link MediaSessionCompat}. No assumptions should be made as to how a 569 * {@link MediaControllerCompat} will handle these extras. Keys should be 570 * fully qualified (e.g. com.example.MY_EXTRA) to avoid conflicts. 571 * 572 * @param extras The extras associated with the session. 573 */ 574 public void setExtras(Bundle extras) { 575 mImpl.setExtras(extras); 576 } 577 578 /** 579 * Gets the underlying framework {@link android.media.session.MediaSession} 580 * object. 581 * <p> 582 * This method is only supported on API 21+. 583 * </p> 584 * 585 * @return The underlying {@link android.media.session.MediaSession} object, 586 * or null if none. 587 */ 588 public Object getMediaSession() { 589 return mImpl.getMediaSession(); 590 } 591 592 /** 593 * Gets the underlying framework {@link android.media.RemoteControlClient} 594 * object. 595 * <p> 596 * This method is only supported on APIs 14-20. On API 21+ 597 * {@link #getMediaSession()} should be used instead. 598 * 599 * @return The underlying {@link android.media.RemoteControlClient} object, 600 * or null if none. 601 */ 602 public Object getRemoteControlClient() { 603 return mImpl.getRemoteControlClient(); 604 } 605 606 /** 607 * Returns the name of the package that sent the last media button, transport control, or 608 * command from controllers and the system. This is only valid while in a request callback, such 609 * as {@link Callback#onPlay}. This method is not available and returns null on pre-N devices. 610 * 611 * @hide 612 */ 613 @RestrictTo(LIBRARY_GROUP) 614 public String getCallingPackage() { 615 return mImpl.getCallingPackage(); 616 } 617 618 /** 619 * Adds a listener to be notified when the active status of this session 620 * changes. This is primarily used by the support library and should not be 621 * needed by apps. 622 * 623 * @param listener The listener to add. 624 */ 625 public void addOnActiveChangeListener(OnActiveChangeListener listener) { 626 if (listener == null) { 627 throw new IllegalArgumentException("Listener may not be null"); 628 } 629 mActiveListeners.add(listener); 630 } 631 632 /** 633 * Stops the listener from being notified when the active status of this 634 * session changes. 635 * 636 * @param listener The listener to remove. 637 */ 638 public void removeOnActiveChangeListener(OnActiveChangeListener listener) { 639 if (listener == null) { 640 throw new IllegalArgumentException("Listener may not be null"); 641 } 642 mActiveListeners.remove(listener); 643 } 644 645 /** 646 * Creates an instance from a framework {@link android.media.session.MediaSession} object. 647 * <p> 648 * This method is only supported on API 21+. On API 20 and below, it returns null. 649 * </p> 650 * 651 * @param context The context to use to create the session. 652 * @param mediaSession A {@link android.media.session.MediaSession} object. 653 * @return An equivalent {@link MediaSessionCompat} object, or null if none. 654 * @deprecated Use {@link #fromMediaSession(Context, Object)} instead. 655 */ 656 @Deprecated 657 public static MediaSessionCompat obtain(Context context, Object mediaSession) { 658 return fromMediaSession(context, mediaSession); 659 } 660 661 /** 662 * Creates an instance from a framework {@link android.media.session.MediaSession} object. 663 * <p> 664 * This method is only supported on API 21+. On API 20 and below, it returns null. 665 * </p> 666 * 667 * @param context The context to use to create the session. 668 * @param mediaSession A {@link android.media.session.MediaSession} object. 669 * @return An equivalent {@link MediaSessionCompat} object, or null if none. 670 */ 671 public static MediaSessionCompat fromMediaSession(Context context, Object mediaSession) { 672 if (context == null || mediaSession == null || Build.VERSION.SDK_INT < 21) { 673 return null; 674 } 675 return new MediaSessionCompat(context, new MediaSessionImplApi21(mediaSession)); 676 } 677 678 /** 679 * Receives transport controls, media buttons, and commands from controllers 680 * and the system. The callback may be set using {@link #setCallback}. 681 */ 682 public abstract static class Callback { 683 final Object mCallbackObj; 684 WeakReference<MediaSessionImpl> mSessionImpl; 685 686 public Callback() { 687 if (android.os.Build.VERSION.SDK_INT >= 24) { 688 mCallbackObj = MediaSessionCompatApi24.createCallback(new StubApi24()); 689 } else if (android.os.Build.VERSION.SDK_INT >= 23) { 690 mCallbackObj = MediaSessionCompatApi23.createCallback(new StubApi23()); 691 } else if (android.os.Build.VERSION.SDK_INT >= 21) { 692 mCallbackObj = MediaSessionCompatApi21.createCallback(new StubApi21()); 693 } else { 694 mCallbackObj = null; 695 } 696 } 697 698 /** 699 * Called when a controller has sent a custom command to this session. 700 * The owner of the session may handle custom commands but is not 701 * required to. 702 * 703 * @param command The command name. 704 * @param extras Optional parameters for the command, may be null. 705 * @param cb A result receiver to which a result may be sent by the command, may be null. 706 */ 707 public void onCommand(String command, Bundle extras, ResultReceiver cb) { 708 } 709 710 /** 711 * Override to handle media button events. 712 * 713 * @param mediaButtonEvent The media button event intent. 714 * @return True if the event was handled, false otherwise. 715 */ 716 public boolean onMediaButtonEvent(Intent mediaButtonEvent) { 717 return false; 718 } 719 720 /** 721 * Override to handle requests to prepare playback. During the preparation, a session 722 * should not hold audio focus in order to allow other session play seamlessly. 723 * The state of playback should be updated to {@link PlaybackStateCompat#STATE_PAUSED} 724 * after the preparation is done. 725 */ 726 public void onPrepare() { 727 } 728 729 /** 730 * Override to handle requests to prepare for playing a specific mediaId that was provided 731 * by your app. During the preparation, a session should not hold audio focus in order to 732 * allow other session play seamlessly. The state of playback should be updated to 733 * {@link PlaybackStateCompat#STATE_PAUSED} after the preparation is done. The playback 734 * of the prepared content should start in the implementation of {@link #onPlay}. Override 735 * {@link #onPlayFromMediaId} to handle requests for starting playback without preparation. 736 */ 737 public void onPrepareFromMediaId(String mediaId, Bundle extras) { 738 } 739 740 /** 741 * Override to handle requests to prepare playback from a search query. An 742 * empty query indicates that the app may prepare any music. The 743 * implementation should attempt to make a smart choice about what to 744 * play. During the preparation, a session should not hold audio focus in order to allow 745 * other session play seamlessly. The state of playback should be updated to 746 * {@link PlaybackStateCompat#STATE_PAUSED} after the preparation is done. 747 * The playback of the prepared content should start in the implementation of 748 * {@link #onPlay}. Override {@link #onPlayFromSearch} to handle requests for 749 * starting playback without preparation. 750 */ 751 public void onPrepareFromSearch(String query, Bundle extras) { 752 } 753 754 /** 755 * Override to handle requests to prepare a specific media item represented by a URI. 756 * During the preparation, a session should not hold audio focus in order to allow other 757 * session play seamlessly. The state of playback should be updated to 758 * {@link PlaybackStateCompat#STATE_PAUSED} after the preparation is done. The playback of 759 * the prepared content should start in the implementation of {@link #onPlay}. Override 760 * {@link #onPlayFromUri} to handle requests for starting playback without preparation. 761 */ 762 public void onPrepareFromUri(Uri uri, Bundle extras) { 763 } 764 765 /** 766 * Override to handle requests to begin playback. 767 */ 768 public void onPlay() { 769 } 770 771 /** 772 * Override to handle requests to play a specific mediaId that was 773 * provided by your app. 774 */ 775 public void onPlayFromMediaId(String mediaId, Bundle extras) { 776 } 777 778 /** 779 * Override to handle requests to begin playback from a search query. An 780 * empty query indicates that the app may play any music. The 781 * implementation should attempt to make a smart choice about what to 782 * play. 783 */ 784 public void onPlayFromSearch(String query, Bundle extras) { 785 } 786 787 /** 788 * Override to handle requests to play a specific media item represented by a URI. 789 */ 790 public void onPlayFromUri(Uri uri, Bundle extras) { 791 } 792 793 /** 794 * Override to handle requests to play an item with a given id from the 795 * play queue. 796 */ 797 public void onSkipToQueueItem(long id) { 798 } 799 800 /** 801 * Override to handle requests to pause playback. 802 */ 803 public void onPause() { 804 } 805 806 /** 807 * Override to handle requests to skip to the next media item. 808 */ 809 public void onSkipToNext() { 810 } 811 812 /** 813 * Override to handle requests to skip to the previous media item. 814 */ 815 public void onSkipToPrevious() { 816 } 817 818 /** 819 * Override to handle requests to fast forward. 820 */ 821 public void onFastForward() { 822 } 823 824 /** 825 * Override to handle requests to rewind. 826 */ 827 public void onRewind() { 828 } 829 830 /** 831 * Override to handle requests to stop playback. 832 */ 833 public void onStop() { 834 } 835 836 /** 837 * Override to handle requests to seek to a specific position in ms. 838 * 839 * @param pos New position to move to, in milliseconds. 840 */ 841 public void onSeekTo(long pos) { 842 } 843 844 /** 845 * Override to handle the item being rated. 846 * 847 * @param rating 848 */ 849 public void onSetRating(RatingCompat rating) { 850 } 851 852 /** 853 * Override to handle the setting of the repeat mode. 854 * <p> 855 * You should call {@link #setRepeatMode} before end of this method in order to notify 856 * the change to the {@link MediaControllerCompat}, or 857 * {@link MediaControllerCompat#getRepeatMode} could return an invalid value. 858 * 859 * @param repeatMode The repeat mode which is one of followings: 860 * {@link PlaybackStateCompat#REPEAT_MODE_NONE}, 861 * {@link PlaybackStateCompat#REPEAT_MODE_ONE}, 862 * {@link PlaybackStateCompat#REPEAT_MODE_ALL} 863 */ 864 public void onSetRepeatMode(@PlaybackStateCompat.RepeatMode int repeatMode) { 865 } 866 867 /** 868 * Override to handle the setting of the shuffle mode. 869 * <p> 870 * You should call {@link #setShuffleModeEnabled} before the end of this method in order to 871 * notify the change to the {@link MediaControllerCompat}, or 872 * {@link MediaControllerCompat#isShuffleModeEnabled} could return an invalid value. 873 * 874 * @param enabled true when the shuffle mode is enabled, false otherwise. 875 */ 876 public void onSetShuffleModeEnabled(boolean enabled) { 877 } 878 879 /** 880 * Called when a {@link MediaControllerCompat} wants a 881 * {@link PlaybackStateCompat.CustomAction} to be performed. 882 * 883 * @param action The action that was originally sent in the 884 * {@link PlaybackStateCompat.CustomAction}. 885 * @param extras Optional extras specified by the 886 * {@link MediaControllerCompat}. 887 */ 888 public void onCustomAction(String action, Bundle extras) { 889 } 890 891 /** 892 * Called when a {@link MediaControllerCompat} wants to add a {@link QueueItem} 893 * with the given {@link MediaDescriptionCompat description} at the end of the play queue. 894 * 895 * @param description The {@link MediaDescriptionCompat} for creating the {@link QueueItem} 896 * to be inserted. 897 */ 898 public void onAddQueueItem(MediaDescriptionCompat description) { 899 } 900 901 /** 902 * Called when a {@link MediaControllerCompat} wants to add a {@link QueueItem} 903 * with the given {@link MediaDescriptionCompat description} at the specified position 904 * in the play queue. 905 * 906 * @param description The {@link MediaDescriptionCompat} for creating the {@link QueueItem} 907 * to be inserted. 908 * @param index The index at which the created {@link QueueItem} is to be inserted. 909 */ 910 public void onAddQueueItem(MediaDescriptionCompat description, int index) { 911 } 912 913 /** 914 * Called when a {@link MediaControllerCompat} wants to remove the first occurrence of the 915 * specified {@link QueueItem} with the given {@link MediaDescriptionCompat description} 916 * in the play queue. 917 * 918 * @param description The {@link MediaDescriptionCompat} for denoting the {@link QueueItem} 919 * to be removed. 920 */ 921 public void onRemoveQueueItem(MediaDescriptionCompat description) { 922 } 923 924 /** 925 * Called when a {@link MediaControllerCompat} wants to remove a {@link QueueItem} at the 926 * specified position in the play queue. 927 * 928 * @param index The index of the element to be removed. 929 */ 930 public void onRemoveQueueItemAt(int index) { 931 } 932 933 private class StubApi21 implements MediaSessionCompatApi21.Callback { 934 935 StubApi21() { 936 } 937 938 @Override 939 public void onCommand(String command, Bundle extras, ResultReceiver cb) { 940 if (command.equals(MediaControllerCompat.COMMAND_GET_EXTRA_BINDER)) { 941 MediaSessionImplApi21 impl = (MediaSessionImplApi21) mSessionImpl.get(); 942 if (impl != null) { 943 Bundle result = new Bundle(); 944 BundleCompat.putBinder(result, EXTRA_BINDER, impl.getExtraSessionBinder()); 945 cb.send(0, result); 946 } 947 } else if (command.equals(MediaControllerCompat.COMMAND_ADD_QUEUE_ITEM)) { 948 extras.setClassLoader(MediaDescriptionCompat.class.getClassLoader()); 949 Callback.this.onAddQueueItem( 950 (MediaDescriptionCompat) extras.getParcelable( 951 MediaControllerCompat.COMMAND_ARGUMENT_MEDIA_DESCRIPTION)); 952 } else if (command.equals(MediaControllerCompat.COMMAND_ADD_QUEUE_ITEM_AT)) { 953 extras.setClassLoader(MediaDescriptionCompat.class.getClassLoader()); 954 Callback.this.onAddQueueItem( 955 (MediaDescriptionCompat) extras.getParcelable( 956 MediaControllerCompat.COMMAND_ARGUMENT_MEDIA_DESCRIPTION), 957 extras.getInt(MediaControllerCompat.COMMAND_ARGUMENT_INDEX)); 958 } else if (command.equals(MediaControllerCompat.COMMAND_REMOVE_QUEUE_ITEM)) { 959 extras.setClassLoader(MediaDescriptionCompat.class.getClassLoader()); 960 Callback.this.onRemoveQueueItem( 961 (MediaDescriptionCompat) extras.getParcelable( 962 MediaControllerCompat.COMMAND_ARGUMENT_MEDIA_DESCRIPTION)); 963 } else if (command.equals(MediaControllerCompat.COMMAND_REMOVE_QUEUE_ITEM_AT)) { 964 Callback.this.onRemoveQueueItemAt( 965 extras.getInt(MediaControllerCompat.COMMAND_ARGUMENT_INDEX)); 966 } else { 967 Callback.this.onCommand(command, extras, cb); 968 } 969 } 970 971 @Override 972 public boolean onMediaButtonEvent(Intent mediaButtonIntent) { 973 return Callback.this.onMediaButtonEvent(mediaButtonIntent); 974 } 975 976 @Override 977 public void onPlay() { 978 Callback.this.onPlay(); 979 } 980 981 @Override 982 public void onPlayFromMediaId(String mediaId, Bundle extras) { 983 Callback.this.onPlayFromMediaId(mediaId, extras); 984 } 985 986 @Override 987 public void onPlayFromSearch(String search, Bundle extras) { 988 Callback.this.onPlayFromSearch(search, extras); 989 } 990 991 @Override 992 public void onSkipToQueueItem(long id) { 993 Callback.this.onSkipToQueueItem(id); 994 } 995 996 @Override 997 public void onPause() { 998 Callback.this.onPause(); 999 } 1000 1001 @Override 1002 public void onSkipToNext() { 1003 Callback.this.onSkipToNext(); 1004 } 1005 1006 @Override 1007 public void onSkipToPrevious() { 1008 Callback.this.onSkipToPrevious(); 1009 } 1010 1011 @Override 1012 public void onFastForward() { 1013 Callback.this.onFastForward(); 1014 } 1015 1016 @Override 1017 public void onRewind() { 1018 Callback.this.onRewind(); 1019 } 1020 1021 @Override 1022 public void onStop() { 1023 Callback.this.onStop(); 1024 } 1025 1026 @Override 1027 public void onSeekTo(long pos) { 1028 Callback.this.onSeekTo(pos); 1029 } 1030 1031 @Override 1032 public void onSetRating(Object ratingObj) { 1033 Callback.this.onSetRating(RatingCompat.fromRating(ratingObj)); 1034 } 1035 1036 @Override 1037 public void onCustomAction(String action, Bundle extras) { 1038 if (action.equals(ACTION_PLAY_FROM_URI)) { 1039 Uri uri = extras.getParcelable(ACTION_ARGUMENT_URI); 1040 Bundle bundle = extras.getParcelable(ACTION_ARGUMENT_EXTRAS); 1041 Callback.this.onPlayFromUri(uri, bundle); 1042 } else if (action.equals(ACTION_PREPARE)) { 1043 Callback.this.onPrepare(); 1044 } else if (action.equals(ACTION_PREPARE_FROM_MEDIA_ID)) { 1045 String mediaId = extras.getString(ACTION_ARGUMENT_MEDIA_ID); 1046 Bundle bundle = extras.getBundle(ACTION_ARGUMENT_EXTRAS); 1047 Callback.this.onPrepareFromMediaId(mediaId, bundle); 1048 } else if (action.equals(ACTION_PREPARE_FROM_SEARCH)) { 1049 String query = extras.getString(ACTION_ARGUMENT_QUERY); 1050 Bundle bundle = extras.getBundle(ACTION_ARGUMENT_EXTRAS); 1051 Callback.this.onPrepareFromSearch(query, bundle); 1052 } else if (action.equals(ACTION_PREPARE_FROM_URI)) { 1053 Uri uri = extras.getParcelable(ACTION_ARGUMENT_URI); 1054 Bundle bundle = extras.getBundle(ACTION_ARGUMENT_EXTRAS); 1055 Callback.this.onPrepareFromUri(uri, bundle); 1056 } else if (action.equals(ACTION_SET_REPEAT_MODE)) { 1057 int repeatMode = extras.getInt(ACTION_ARGUMENT_REPEAT_MODE); 1058 Callback.this.onSetRepeatMode(repeatMode); 1059 } else if (action.equals(ACTION_SET_SHUFFLE_MODE_ENABLED)) { 1060 boolean enabled = extras.getBoolean(ACTION_ARGUMENT_SHUFFLE_MODE_ENABLED); 1061 Callback.this.onSetShuffleModeEnabled(enabled); 1062 } else { 1063 Callback.this.onCustomAction(action, extras); 1064 } 1065 } 1066 } 1067 1068 private class StubApi23 extends StubApi21 implements MediaSessionCompatApi23.Callback { 1069 1070 StubApi23() { 1071 } 1072 1073 @Override 1074 public void onPlayFromUri(Uri uri, Bundle extras) { 1075 Callback.this.onPlayFromUri(uri, extras); 1076 } 1077 } 1078 1079 private class StubApi24 extends StubApi23 implements MediaSessionCompatApi24.Callback { 1080 1081 StubApi24() { 1082 } 1083 1084 @Override 1085 public void onPrepare() { 1086 Callback.this.onPrepare(); 1087 } 1088 1089 @Override 1090 public void onPrepareFromMediaId(String mediaId, Bundle extras) { 1091 Callback.this.onPrepareFromMediaId(mediaId, extras); 1092 } 1093 1094 @Override 1095 public void onPrepareFromSearch(String query, Bundle extras) { 1096 Callback.this.onPrepareFromSearch(query, extras); 1097 } 1098 1099 @Override 1100 public void onPrepareFromUri(Uri uri, Bundle extras) { 1101 Callback.this.onPrepareFromUri(uri, extras); 1102 } 1103 } 1104 } 1105 1106 /** 1107 * Represents an ongoing session. This may be passed to apps by the session 1108 * owner to allow them to create a {@link MediaControllerCompat} to communicate with 1109 * the session. 1110 */ 1111 public static final class Token implements Parcelable { 1112 private final Object mInner; 1113 1114 Token(Object inner) { 1115 mInner = inner; 1116 } 1117 1118 /** 1119 * Creates a compat Token from a framework 1120 * {@link android.media.session.MediaSession.Token} object. 1121 * <p> 1122 * This method is only supported on 1123 * {@link android.os.Build.VERSION_CODES#LOLLIPOP} and later. 1124 * </p> 1125 * 1126 * @param token The framework token object. 1127 * @return A compat Token for use with {@link MediaControllerCompat}. 1128 */ 1129 public static Token fromToken(Object token) { 1130 if (token == null || android.os.Build.VERSION.SDK_INT < 21) { 1131 return null; 1132 } 1133 return new Token(MediaSessionCompatApi21.verifyToken(token)); 1134 } 1135 1136 @Override 1137 public int describeContents() { 1138 return 0; 1139 } 1140 1141 @Override 1142 public void writeToParcel(Parcel dest, int flags) { 1143 if (android.os.Build.VERSION.SDK_INT >= 21) { 1144 dest.writeParcelable((Parcelable) mInner, flags); 1145 } else { 1146 dest.writeStrongBinder((IBinder) mInner); 1147 } 1148 } 1149 1150 @Override 1151 public int hashCode() { 1152 if (mInner == null) { 1153 return 0; 1154 } 1155 return mInner.hashCode(); 1156 } 1157 1158 @Override 1159 public boolean equals(Object obj) { 1160 if (this == obj) { 1161 return true; 1162 } 1163 if (!(obj instanceof Token)) { 1164 return false; 1165 } 1166 1167 Token other = (Token) obj; 1168 if (mInner == null) { 1169 return other.mInner == null; 1170 } 1171 if (other.mInner == null) { 1172 return false; 1173 } 1174 return mInner.equals(other.mInner); 1175 } 1176 1177 /** 1178 * Gets the underlying framework {@link android.media.session.MediaSession.Token} object. 1179 * <p> 1180 * This method is only supported on API 21+. 1181 * </p> 1182 * 1183 * @return The underlying {@link android.media.session.MediaSession.Token} object, 1184 * or null if none. 1185 */ 1186 public Object getToken() { 1187 return mInner; 1188 } 1189 1190 public static final Parcelable.Creator<Token> CREATOR 1191 = new Parcelable.Creator<Token>() { 1192 @Override 1193 public Token createFromParcel(Parcel in) { 1194 Object inner; 1195 if (android.os.Build.VERSION.SDK_INT >= 21) { 1196 inner = in.readParcelable(null); 1197 } else { 1198 inner = in.readStrongBinder(); 1199 } 1200 return new Token(inner); 1201 } 1202 1203 @Override 1204 public Token[] newArray(int size) { 1205 return new Token[size]; 1206 } 1207 }; 1208 } 1209 1210 /** 1211 * A single item that is part of the play queue. It contains a description 1212 * of the item and its id in the queue. 1213 */ 1214 public static final class QueueItem implements Parcelable { 1215 /** 1216 * This id is reserved. No items can be explicitly assigned this id. 1217 */ 1218 public static final int UNKNOWN_ID = -1; 1219 1220 private final MediaDescriptionCompat mDescription; 1221 private final long mId; 1222 1223 private Object mItem; 1224 1225 /** 1226 * Create a new {@link MediaSessionCompat.QueueItem}. 1227 * 1228 * @param description The {@link MediaDescriptionCompat} for this item. 1229 * @param id An identifier for this item. It must be unique within the 1230 * play queue and cannot be {@link #UNKNOWN_ID}. 1231 */ 1232 public QueueItem(MediaDescriptionCompat description, long id) { 1233 this(null, description, id); 1234 } 1235 1236 private QueueItem(Object queueItem, MediaDescriptionCompat description, long id) { 1237 if (description == null) { 1238 throw new IllegalArgumentException("Description cannot be null."); 1239 } 1240 if (id == UNKNOWN_ID) { 1241 throw new IllegalArgumentException("Id cannot be QueueItem.UNKNOWN_ID"); 1242 } 1243 mDescription = description; 1244 mId = id; 1245 mItem = queueItem; 1246 } 1247 1248 QueueItem(Parcel in) { 1249 mDescription = MediaDescriptionCompat.CREATOR.createFromParcel(in); 1250 mId = in.readLong(); 1251 } 1252 1253 /** 1254 * Get the description for this item. 1255 */ 1256 public MediaDescriptionCompat getDescription() { 1257 return mDescription; 1258 } 1259 1260 /** 1261 * Get the queue id for this item. 1262 */ 1263 public long getQueueId() { 1264 return mId; 1265 } 1266 1267 @Override 1268 public void writeToParcel(Parcel dest, int flags) { 1269 mDescription.writeToParcel(dest, flags); 1270 dest.writeLong(mId); 1271 } 1272 1273 @Override 1274 public int describeContents() { 1275 return 0; 1276 } 1277 1278 /** 1279 * Get the underlying 1280 * {@link android.media.session.MediaSession.QueueItem}. 1281 * <p> 1282 * On builds before {@link android.os.Build.VERSION_CODES#LOLLIPOP} null 1283 * is returned. 1284 * 1285 * @return The underlying 1286 * {@link android.media.session.MediaSession.QueueItem} or null. 1287 */ 1288 public Object getQueueItem() { 1289 if (mItem != null || android.os.Build.VERSION.SDK_INT < 21) { 1290 return mItem; 1291 } 1292 mItem = MediaSessionCompatApi21.QueueItem.createItem(mDescription.getMediaDescription(), 1293 mId); 1294 return mItem; 1295 } 1296 1297 /** 1298 * Creates an instance from a framework {@link android.media.session.MediaSession.QueueItem} 1299 * object. 1300 * <p> 1301 * This method is only supported on API 21+. On API 20 and below, it returns null. 1302 * </p> 1303 * 1304 * @param queueItem A {@link android.media.session.MediaSession.QueueItem} object. 1305 * @return An equivalent {@link QueueItem} object, or null if none. 1306 * @deprecated Use {@link #fromQueueItem(Object)} instead. 1307 */ 1308 @Deprecated 1309 public static QueueItem obtain(Object queueItem) { 1310 return fromQueueItem(queueItem); 1311 } 1312 1313 /** 1314 * Creates an instance from a framework {@link android.media.session.MediaSession.QueueItem} 1315 * object. 1316 * <p> 1317 * This method is only supported on API 21+. On API 20 and below, it returns null. 1318 * </p> 1319 * 1320 * @param queueItem A {@link android.media.session.MediaSession.QueueItem} object. 1321 * @return An equivalent {@link QueueItem} object, or null if none. 1322 */ 1323 public static QueueItem fromQueueItem(Object queueItem) { 1324 if (queueItem == null || Build.VERSION.SDK_INT < 21) { 1325 return null; 1326 } 1327 Object descriptionObj = MediaSessionCompatApi21.QueueItem.getDescription(queueItem); 1328 MediaDescriptionCompat description = MediaDescriptionCompat.fromMediaDescription( 1329 descriptionObj); 1330 long id = MediaSessionCompatApi21.QueueItem.getQueueId(queueItem); 1331 return new QueueItem(queueItem, description, id); 1332 } 1333 1334 /** 1335 * Creates a list of {@link QueueItem} objects from a framework 1336 * {@link android.media.session.MediaSession.QueueItem} object list. 1337 * <p> 1338 * This method is only supported on API 21+. On API 20 and below, it returns null. 1339 * </p> 1340 * 1341 * @param itemList A list of {@link android.media.session.MediaSession.QueueItem} objects. 1342 * @return An equivalent list of {@link QueueItem} objects, or null if none. 1343 */ 1344 public static List<QueueItem> fromQueueItemList(List<?> itemList) { 1345 if (itemList == null || Build.VERSION.SDK_INT < 21) { 1346 return null; 1347 } 1348 List<QueueItem> items = new ArrayList<>(); 1349 for (Object itemObj : itemList) { 1350 items.add(fromQueueItem(itemObj)); 1351 } 1352 return items; 1353 } 1354 1355 public static final Creator<MediaSessionCompat.QueueItem> CREATOR 1356 = new Creator<MediaSessionCompat.QueueItem>() { 1357 1358 @Override 1359 public MediaSessionCompat.QueueItem createFromParcel(Parcel p) { 1360 return new MediaSessionCompat.QueueItem(p); 1361 } 1362 1363 @Override 1364 public MediaSessionCompat.QueueItem[] newArray(int size) { 1365 return new MediaSessionCompat.QueueItem[size]; 1366 } 1367 }; 1368 1369 @Override 1370 public String toString() { 1371 return "MediaSession.QueueItem {" + 1372 "Description=" + mDescription + 1373 ", Id=" + mId + " }"; 1374 } 1375 } 1376 1377 /** 1378 * This is a wrapper for {@link ResultReceiver} for sending over aidl 1379 * interfaces. The framework version was not exposed to aidls until 1380 * {@link android.os.Build.VERSION_CODES#LOLLIPOP}. 1381 */ 1382 static final class ResultReceiverWrapper implements Parcelable { 1383 private ResultReceiver mResultReceiver; 1384 1385 public ResultReceiverWrapper(ResultReceiver resultReceiver) { 1386 mResultReceiver = resultReceiver; 1387 } 1388 1389 ResultReceiverWrapper(Parcel in) { 1390 mResultReceiver = ResultReceiver.CREATOR.createFromParcel(in); 1391 } 1392 1393 public static final Creator<ResultReceiverWrapper> 1394 CREATOR = new Creator<ResultReceiverWrapper>() { 1395 @Override 1396 public ResultReceiverWrapper createFromParcel(Parcel p) { 1397 return new ResultReceiverWrapper(p); 1398 } 1399 1400 @Override 1401 public ResultReceiverWrapper[] newArray(int size) { 1402 return new ResultReceiverWrapper[size]; 1403 } 1404 }; 1405 1406 @Override 1407 public int describeContents() { 1408 return 0; 1409 } 1410 1411 @Override 1412 public void writeToParcel(Parcel dest, int flags) { 1413 mResultReceiver.writeToParcel(dest, flags); 1414 } 1415 } 1416 1417 public interface OnActiveChangeListener { 1418 void onActiveChanged(); 1419 } 1420 1421 interface MediaSessionImpl { 1422 void setCallback(Callback callback, Handler handler); 1423 void setFlags(@SessionFlags int flags); 1424 void setPlaybackToLocal(int stream); 1425 void setPlaybackToRemote(VolumeProviderCompat volumeProvider); 1426 void setActive(boolean active); 1427 boolean isActive(); 1428 void sendSessionEvent(String event, Bundle extras); 1429 void release(); 1430 Token getSessionToken(); 1431 void setPlaybackState(PlaybackStateCompat state); 1432 void setMetadata(MediaMetadataCompat metadata); 1433 1434 void setSessionActivity(PendingIntent pi); 1435 1436 void setMediaButtonReceiver(PendingIntent mbr); 1437 void setQueue(List<QueueItem> queue); 1438 void setQueueTitle(CharSequence title); 1439 1440 void setRatingType(@RatingCompat.Style int type); 1441 void setRepeatMode(@PlaybackStateCompat.RepeatMode int repeatMode); 1442 void setShuffleModeEnabled(boolean enabled); 1443 void setExtras(Bundle extras); 1444 1445 Object getMediaSession(); 1446 1447 Object getRemoteControlClient(); 1448 1449 String getCallingPackage(); 1450 } 1451 1452 static class MediaSessionImplBase implements MediaSessionImpl { 1453 private final Context mContext; 1454 private final ComponentName mMediaButtonReceiverComponentName; 1455 private final PendingIntent mMediaButtonReceiverIntent; 1456 private final Object mRccObj; 1457 private final MediaSessionStub mStub; 1458 private final Token mToken; 1459 final String mPackageName; 1460 final String mTag; 1461 final AudioManager mAudioManager; 1462 1463 final Object mLock = new Object(); 1464 final RemoteCallbackList<IMediaControllerCallback> mControllerCallbacks 1465 = new RemoteCallbackList<>(); 1466 1467 private MessageHandler mHandler; 1468 boolean mDestroyed = false; 1469 private boolean mIsActive = false; 1470 private boolean mIsRccRegistered = false; 1471 private boolean mIsMbrRegistered = false; 1472 volatile Callback mCallback; 1473 1474 @SessionFlags int mFlags; 1475 1476 MediaMetadataCompat mMetadata; 1477 PlaybackStateCompat mState; 1478 PendingIntent mSessionActivity; 1479 List<QueueItem> mQueue; 1480 CharSequence mQueueTitle; 1481 @RatingCompat.Style int mRatingType; 1482 @PlaybackStateCompat.RepeatMode int mRepeatMode; 1483 boolean mShuffleModeEnabled; 1484 Bundle mExtras; 1485 1486 int mVolumeType; 1487 int mLocalStream; 1488 VolumeProviderCompat mVolumeProvider; 1489 1490 private VolumeProviderCompat.Callback mVolumeCallback 1491 = new VolumeProviderCompat.Callback() { 1492 @Override 1493 public void onVolumeChanged(VolumeProviderCompat volumeProvider) { 1494 if (mVolumeProvider != volumeProvider) { 1495 return; 1496 } 1497 ParcelableVolumeInfo info = new ParcelableVolumeInfo(mVolumeType, mLocalStream, 1498 volumeProvider.getVolumeControl(), volumeProvider.getMaxVolume(), 1499 volumeProvider.getCurrentVolume()); 1500 sendVolumeInfoChanged(info); 1501 } 1502 }; 1503 1504 public MediaSessionImplBase(Context context, String tag, ComponentName mbrComponent, 1505 PendingIntent mbrIntent) { 1506 if (mbrComponent == null) { 1507 throw new IllegalArgumentException( 1508 "MediaButtonReceiver component may not be null."); 1509 } 1510 mContext = context; 1511 mPackageName = context.getPackageName(); 1512 mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); 1513 mTag = tag; 1514 mMediaButtonReceiverComponentName = mbrComponent; 1515 mMediaButtonReceiverIntent = mbrIntent; 1516 mStub = new MediaSessionStub(); 1517 mToken = new Token(mStub); 1518 1519 mRatingType = RatingCompat.RATING_NONE; 1520 mVolumeType = MediaControllerCompat.PlaybackInfo.PLAYBACK_TYPE_LOCAL; 1521 mLocalStream = AudioManager.STREAM_MUSIC; 1522 if (android.os.Build.VERSION.SDK_INT >= 14) { 1523 mRccObj = MediaSessionCompatApi14.createRemoteControlClient(mbrIntent); 1524 } else { 1525 mRccObj = null; 1526 } 1527 } 1528 1529 @Override 1530 public void setCallback(Callback callback, Handler handler) { 1531 mCallback = callback; 1532 if (callback == null) { 1533 // There's nothing to unregister on API < 18 since media buttons 1534 // all go through the media button receiver 1535 if (android.os.Build.VERSION.SDK_INT >= 18) { 1536 MediaSessionCompatApi18.setOnPlaybackPositionUpdateListener(mRccObj, null); 1537 } 1538 if (android.os.Build.VERSION.SDK_INT >= 19) { 1539 MediaSessionCompatApi19.setOnMetadataUpdateListener(mRccObj, null); 1540 } 1541 } else { 1542 if (handler == null) { 1543 handler = new Handler(); 1544 } 1545 synchronized (mLock) { 1546 mHandler = new MessageHandler(handler.getLooper()); 1547 } 1548 MediaSessionCompatApi19.Callback cb19 = new MediaSessionCompatApi19.Callback() { 1549 @Override 1550 public void onSetRating(Object ratingObj) { 1551 postToHandler(MessageHandler.MSG_RATE, 1552 RatingCompat.fromRating(ratingObj)); 1553 } 1554 1555 @Override 1556 public void onSeekTo(long pos) { 1557 postToHandler(MessageHandler.MSG_SEEK_TO, pos); 1558 } 1559 }; 1560 if (android.os.Build.VERSION.SDK_INT >= 18) { 1561 Object onPositionUpdateObj = MediaSessionCompatApi18 1562 .createPlaybackPositionUpdateListener(cb19); 1563 MediaSessionCompatApi18.setOnPlaybackPositionUpdateListener(mRccObj, 1564 onPositionUpdateObj); 1565 } 1566 if (android.os.Build.VERSION.SDK_INT >= 19) { 1567 Object onMetadataUpdateObj = MediaSessionCompatApi19 1568 .createMetadataUpdateListener(cb19); 1569 MediaSessionCompatApi19.setOnMetadataUpdateListener(mRccObj, 1570 onMetadataUpdateObj); 1571 } 1572 } 1573 } 1574 1575 void postToHandler(int what) { 1576 postToHandler(what, null); 1577 } 1578 1579 void postToHandler(int what, int arg1) { 1580 postToHandler(what, null, arg1); 1581 } 1582 1583 void postToHandler(int what, Object obj) { 1584 postToHandler(what, obj, null); 1585 } 1586 1587 void postToHandler(int what, Object obj, int arg1) { 1588 synchronized (mLock) { 1589 if (mHandler != null) { 1590 mHandler.post(what, obj, arg1); 1591 } 1592 } 1593 } 1594 1595 void postToHandler(int what, Object obj, Bundle extras) { 1596 synchronized (mLock) { 1597 if (mHandler != null) { 1598 mHandler.post(what, obj, extras); 1599 } 1600 } 1601 } 1602 1603 @Override 1604 public void setFlags(@SessionFlags int flags) { 1605 synchronized (mLock) { 1606 mFlags = flags; 1607 } 1608 update(); 1609 } 1610 1611 @Override 1612 public void setPlaybackToLocal(int stream) { 1613 if (mVolumeProvider != null) { 1614 mVolumeProvider.setCallback(null); 1615 } 1616 mVolumeType = MediaControllerCompat.PlaybackInfo.PLAYBACK_TYPE_LOCAL; 1617 ParcelableVolumeInfo info = new ParcelableVolumeInfo(mVolumeType, mLocalStream, 1618 VolumeProviderCompat.VOLUME_CONTROL_ABSOLUTE, 1619 mAudioManager.getStreamMaxVolume(mLocalStream), 1620 mAudioManager.getStreamVolume(mLocalStream)); 1621 sendVolumeInfoChanged(info); 1622 } 1623 1624 @Override 1625 public void setPlaybackToRemote(VolumeProviderCompat volumeProvider) { 1626 if (volumeProvider == null) { 1627 throw new IllegalArgumentException("volumeProvider may not be null"); 1628 } 1629 if (mVolumeProvider != null) { 1630 mVolumeProvider.setCallback(null); 1631 } 1632 mVolumeType = MediaControllerCompat.PlaybackInfo.PLAYBACK_TYPE_REMOTE; 1633 mVolumeProvider = volumeProvider; 1634 ParcelableVolumeInfo info = new ParcelableVolumeInfo(mVolumeType, mLocalStream, 1635 mVolumeProvider.getVolumeControl(), mVolumeProvider.getMaxVolume(), 1636 mVolumeProvider.getCurrentVolume()); 1637 sendVolumeInfoChanged(info); 1638 1639 volumeProvider.setCallback(mVolumeCallback); 1640 } 1641 1642 @Override 1643 public void setActive(boolean active) { 1644 if (active == mIsActive) { 1645 return; 1646 } 1647 mIsActive = active; 1648 if (update()) { 1649 setMetadata(mMetadata); 1650 setPlaybackState(mState); 1651 } 1652 } 1653 1654 @Override 1655 public boolean isActive() { 1656 return mIsActive; 1657 } 1658 1659 @Override 1660 public void sendSessionEvent(String event, Bundle extras) { 1661 sendEvent(event, extras); 1662 } 1663 1664 @Override 1665 public void release() { 1666 mIsActive = false; 1667 mDestroyed = true; 1668 update(); 1669 sendSessionDestroyed(); 1670 } 1671 1672 @Override 1673 public Token getSessionToken() { 1674 return mToken; 1675 } 1676 1677 @Override 1678 public void setPlaybackState(PlaybackStateCompat state) { 1679 synchronized (mLock) { 1680 mState = state; 1681 } 1682 sendState(state); 1683 if (!mIsActive) { 1684 // Don't set the state until after the RCC is registered 1685 return; 1686 } 1687 if (state == null) { 1688 if (android.os.Build.VERSION.SDK_INT >= 14) { 1689 MediaSessionCompatApi14.setState(mRccObj, PlaybackStateCompat.STATE_NONE); 1690 MediaSessionCompatApi14.setTransportControlFlags(mRccObj, 0); 1691 } 1692 } else { 1693 // Set state 1694 if (android.os.Build.VERSION.SDK_INT >= 18) { 1695 MediaSessionCompatApi18.setState(mRccObj, state.getState(), state.getPosition(), 1696 state.getPlaybackSpeed(), state.getLastPositionUpdateTime()); 1697 } else if (android.os.Build.VERSION.SDK_INT >= 14) { 1698 MediaSessionCompatApi14.setState(mRccObj, state.getState()); 1699 } 1700 1701 // Set transport control flags 1702 if (android.os.Build.VERSION.SDK_INT >= 19) { 1703 MediaSessionCompatApi19.setTransportControlFlags(mRccObj, state.getActions()); 1704 } else if (android.os.Build.VERSION.SDK_INT >= 18) { 1705 MediaSessionCompatApi18.setTransportControlFlags(mRccObj, state.getActions()); 1706 } else if (android.os.Build.VERSION.SDK_INT >= 14) { 1707 MediaSessionCompatApi14.setTransportControlFlags(mRccObj, state.getActions()); 1708 } 1709 } 1710 } 1711 1712 @Override 1713 public void setMetadata(MediaMetadataCompat metadata) { 1714 if (metadata != null) { 1715 // Clones the given {@link MediaMetadataCompat}, deep-copying bitmaps in the 1716 // metadata if necessary. Bitmaps can be scaled down if they are large. 1717 metadata = new MediaMetadataCompat.Builder(metadata, sMaxBitmapSize).build(); 1718 } 1719 1720 synchronized (mLock) { 1721 mMetadata = metadata; 1722 } 1723 sendMetadata(metadata); 1724 if (!mIsActive) { 1725 // Don't set metadata until after the rcc has been registered 1726 return; 1727 } 1728 if (android.os.Build.VERSION.SDK_INT >= 19) { 1729 MediaSessionCompatApi19.setMetadata(mRccObj, 1730 metadata == null ? null : metadata.getBundle(), 1731 mState == null ? 0 : mState.getActions()); 1732 } else if (android.os.Build.VERSION.SDK_INT >= 14) { 1733 MediaSessionCompatApi14.setMetadata(mRccObj, 1734 metadata == null ? null : metadata.getBundle()); 1735 } 1736 } 1737 1738 @Override 1739 public void setSessionActivity(PendingIntent pi) { 1740 synchronized (mLock) { 1741 mSessionActivity = pi; 1742 } 1743 } 1744 1745 @Override 1746 public void setMediaButtonReceiver(PendingIntent mbr) { 1747 // Do nothing, changing this is not supported before API 21. 1748 } 1749 1750 @Override 1751 public void setQueue(List<QueueItem> queue) { 1752 mQueue = queue; 1753 sendQueue(queue); 1754 } 1755 1756 @Override 1757 public void setQueueTitle(CharSequence title) { 1758 mQueueTitle = title; 1759 sendQueueTitle(title); 1760 } 1761 1762 @Override 1763 public Object getMediaSession() { 1764 return null; 1765 } 1766 1767 @Override 1768 public Object getRemoteControlClient() { 1769 return mRccObj; 1770 } 1771 1772 @Override 1773 public String getCallingPackage() { 1774 return null; 1775 } 1776 1777 @Override 1778 public void setRatingType(@RatingCompat.Style int type) { 1779 mRatingType = type; 1780 } 1781 1782 @Override 1783 public void setRepeatMode(@PlaybackStateCompat.RepeatMode int repeatMode) { 1784 if (mRepeatMode != repeatMode) { 1785 mRepeatMode = repeatMode; 1786 sendRepeatMode(repeatMode); 1787 } 1788 } 1789 1790 @Override 1791 public void setShuffleModeEnabled(boolean enabled) { 1792 if (mShuffleModeEnabled != enabled) { 1793 mShuffleModeEnabled = enabled; 1794 sendShuffleModeEnabled(enabled); 1795 } 1796 } 1797 1798 @Override 1799 public void setExtras(Bundle extras) { 1800 mExtras = extras; 1801 sendExtras(extras); 1802 } 1803 1804 // Registers/unregisters the RCC and MediaButtonEventReceiver as needed. 1805 private boolean update() { 1806 boolean registeredRcc = false; 1807 if (mIsActive) { 1808 // Register a MBR if it's supported, unregister it 1809 // if support was removed. 1810 if (!mIsMbrRegistered && (mFlags & FLAG_HANDLES_MEDIA_BUTTONS) != 0) { 1811 if (android.os.Build.VERSION.SDK_INT >= 18) { 1812 MediaSessionCompatApi18.registerMediaButtonEventReceiver(mContext, 1813 mMediaButtonReceiverIntent, 1814 mMediaButtonReceiverComponentName); 1815 } else { 1816 AudioManager am = (AudioManager) mContext.getSystemService( 1817 Context.AUDIO_SERVICE); 1818 am.registerMediaButtonEventReceiver(mMediaButtonReceiverComponentName); 1819 } 1820 mIsMbrRegistered = true; 1821 } else if (mIsMbrRegistered && (mFlags & FLAG_HANDLES_MEDIA_BUTTONS) == 0) { 1822 if (android.os.Build.VERSION.SDK_INT >= 18) { 1823 MediaSessionCompatApi18.unregisterMediaButtonEventReceiver(mContext, 1824 mMediaButtonReceiverIntent, 1825 mMediaButtonReceiverComponentName); 1826 } else { 1827 AudioManager am = (AudioManager) mContext.getSystemService( 1828 Context.AUDIO_SERVICE); 1829 am.unregisterMediaButtonEventReceiver(mMediaButtonReceiverComponentName); 1830 } 1831 mIsMbrRegistered = false; 1832 } 1833 // On API 14+ register a RCC if it's supported, unregister it if 1834 // not. 1835 if (android.os.Build.VERSION.SDK_INT >= 14) { 1836 if (!mIsRccRegistered && (mFlags & FLAG_HANDLES_TRANSPORT_CONTROLS) != 0) { 1837 MediaSessionCompatApi14.registerRemoteControlClient(mContext, mRccObj); 1838 mIsRccRegistered = true; 1839 registeredRcc = true; 1840 } else if (mIsRccRegistered 1841 && (mFlags & FLAG_HANDLES_TRANSPORT_CONTROLS) == 0) { 1842 // RCC keeps the state while the system resets its state internally when 1843 // we register RCC. Reset the state so that the states in RCC and the system 1844 // are in sync when we re-register the RCC. 1845 MediaSessionCompatApi14.setState(mRccObj, PlaybackStateCompat.STATE_NONE); 1846 MediaSessionCompatApi14.unregisterRemoteControlClient(mContext, mRccObj); 1847 mIsRccRegistered = false; 1848 } 1849 } 1850 } else { 1851 // When inactive remove any registered components. 1852 if (mIsMbrRegistered) { 1853 if (android.os.Build.VERSION.SDK_INT >= 18) { 1854 MediaSessionCompatApi18.unregisterMediaButtonEventReceiver(mContext, 1855 mMediaButtonReceiverIntent, mMediaButtonReceiverComponentName); 1856 } else { 1857 AudioManager am = (AudioManager) mContext.getSystemService( 1858 Context.AUDIO_SERVICE); 1859 am.unregisterMediaButtonEventReceiver(mMediaButtonReceiverComponentName); 1860 } 1861 mIsMbrRegistered = false; 1862 } 1863 if (mIsRccRegistered) { 1864 // RCC keeps the state while the system resets its state internally when 1865 // we register RCC. Reset the state so that the states in RCC and the system 1866 // are in sync when we re-register the RCC. 1867 MediaSessionCompatApi14.setState(mRccObj, PlaybackStateCompat.STATE_NONE); 1868 MediaSessionCompatApi14.unregisterRemoteControlClient(mContext, mRccObj); 1869 mIsRccRegistered = false; 1870 } 1871 } 1872 return registeredRcc; 1873 } 1874 1875 void adjustVolume(int direction, int flags) { 1876 if (mVolumeType == MediaControllerCompat.PlaybackInfo.PLAYBACK_TYPE_REMOTE) { 1877 if (mVolumeProvider != null) { 1878 mVolumeProvider.onAdjustVolume(direction); 1879 } 1880 } else { 1881 mAudioManager.adjustStreamVolume(mLocalStream, direction, flags); 1882 } 1883 } 1884 1885 void setVolumeTo(int value, int flags) { 1886 if (mVolumeType == MediaControllerCompat.PlaybackInfo.PLAYBACK_TYPE_REMOTE) { 1887 if (mVolumeProvider != null) { 1888 mVolumeProvider.onSetVolumeTo(value); 1889 } 1890 } else { 1891 mAudioManager.setStreamVolume(mLocalStream, value, flags); 1892 } 1893 } 1894 1895 PlaybackStateCompat getStateWithUpdatedPosition() { 1896 PlaybackStateCompat state; 1897 long duration = -1; 1898 synchronized (mLock) { 1899 state = mState; 1900 if (mMetadata != null 1901 && mMetadata.containsKey(MediaMetadataCompat.METADATA_KEY_DURATION)) { 1902 duration = mMetadata.getLong(MediaMetadataCompat.METADATA_KEY_DURATION); 1903 } 1904 } 1905 1906 PlaybackStateCompat result = null; 1907 if (state != null) { 1908 if (state.getState() == PlaybackStateCompat.STATE_PLAYING 1909 || state.getState() == PlaybackStateCompat.STATE_FAST_FORWARDING 1910 || state.getState() == PlaybackStateCompat.STATE_REWINDING) { 1911 long updateTime = state.getLastPositionUpdateTime(); 1912 long currentTime = SystemClock.elapsedRealtime(); 1913 if (updateTime > 0) { 1914 long position = (long) (state.getPlaybackSpeed() 1915 * (currentTime - updateTime)) + state.getPosition(); 1916 if (duration >= 0 && position > duration) { 1917 position = duration; 1918 } else if (position < 0) { 1919 position = 0; 1920 } 1921 PlaybackStateCompat.Builder builder = new PlaybackStateCompat.Builder( 1922 state); 1923 builder.setState(state.getState(), position, state.getPlaybackSpeed(), 1924 currentTime); 1925 result = builder.build(); 1926 } 1927 } 1928 } 1929 return result == null ? state : result; 1930 } 1931 1932 void sendVolumeInfoChanged(ParcelableVolumeInfo info) { 1933 int size = mControllerCallbacks.beginBroadcast(); 1934 for (int i = size - 1; i >= 0; i--) { 1935 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 1936 try { 1937 cb.onVolumeInfoChanged(info); 1938 } catch (RemoteException e) { 1939 } 1940 } 1941 mControllerCallbacks.finishBroadcast(); 1942 } 1943 1944 private void sendSessionDestroyed() { 1945 int size = mControllerCallbacks.beginBroadcast(); 1946 for (int i = size - 1; i >= 0; i--) { 1947 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 1948 try { 1949 cb.onSessionDestroyed(); 1950 } catch (RemoteException e) { 1951 } 1952 } 1953 mControllerCallbacks.finishBroadcast(); 1954 mControllerCallbacks.kill(); 1955 } 1956 1957 private void sendEvent(String event, Bundle extras) { 1958 int size = mControllerCallbacks.beginBroadcast(); 1959 for (int i = size - 1; i >= 0; i--) { 1960 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 1961 try { 1962 cb.onEvent(event, extras); 1963 } catch (RemoteException e) { 1964 } 1965 } 1966 mControllerCallbacks.finishBroadcast(); 1967 } 1968 1969 private void sendState(PlaybackStateCompat state) { 1970 int size = mControllerCallbacks.beginBroadcast(); 1971 for (int i = size - 1; i >= 0; i--) { 1972 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 1973 try { 1974 cb.onPlaybackStateChanged(state); 1975 } catch (RemoteException e) { 1976 } 1977 } 1978 mControllerCallbacks.finishBroadcast(); 1979 } 1980 1981 private void sendMetadata(MediaMetadataCompat metadata) { 1982 int size = mControllerCallbacks.beginBroadcast(); 1983 for (int i = size - 1; i >= 0; i--) { 1984 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 1985 try { 1986 cb.onMetadataChanged(metadata); 1987 } catch (RemoteException e) { 1988 } 1989 } 1990 mControllerCallbacks.finishBroadcast(); 1991 } 1992 1993 private void sendQueue(List<QueueItem> queue) { 1994 int size = mControllerCallbacks.beginBroadcast(); 1995 for (int i = size - 1; i >= 0; i--) { 1996 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 1997 try { 1998 cb.onQueueChanged(queue); 1999 } catch (RemoteException e) { 2000 } 2001 } 2002 mControllerCallbacks.finishBroadcast(); 2003 } 2004 2005 private void sendQueueTitle(CharSequence queueTitle) { 2006 int size = mControllerCallbacks.beginBroadcast(); 2007 for (int i = size - 1; i >= 0; i--) { 2008 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 2009 try { 2010 cb.onQueueTitleChanged(queueTitle); 2011 } catch (RemoteException e) { 2012 } 2013 } 2014 mControllerCallbacks.finishBroadcast(); 2015 } 2016 2017 private void sendRepeatMode(int repeatMode) { 2018 int size = mControllerCallbacks.beginBroadcast(); 2019 for (int i = size - 1; i >= 0; i--) { 2020 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 2021 try { 2022 cb.onRepeatModeChanged(repeatMode); 2023 } catch (RemoteException e) { 2024 } 2025 } 2026 mControllerCallbacks.finishBroadcast(); 2027 } 2028 2029 private void sendShuffleModeEnabled(boolean enabled) { 2030 int size = mControllerCallbacks.beginBroadcast(); 2031 for (int i = size - 1; i >= 0; i--) { 2032 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 2033 try { 2034 cb.onShuffleModeChanged(enabled); 2035 } catch (RemoteException e) { 2036 } 2037 } 2038 mControllerCallbacks.finishBroadcast(); 2039 } 2040 2041 private void sendExtras(Bundle extras) { 2042 int size = mControllerCallbacks.beginBroadcast(); 2043 for (int i = size - 1; i >= 0; i--) { 2044 IMediaControllerCallback cb = mControllerCallbacks.getBroadcastItem(i); 2045 try { 2046 cb.onExtrasChanged(extras); 2047 } catch (RemoteException e) { 2048 } 2049 } 2050 mControllerCallbacks.finishBroadcast(); 2051 } 2052 2053 class MediaSessionStub extends IMediaSession.Stub { 2054 @Override 2055 public void sendCommand(String command, Bundle args, ResultReceiverWrapper cb) { 2056 postToHandler(MessageHandler.MSG_COMMAND, 2057 new Command(command, args, cb.mResultReceiver)); 2058 } 2059 2060 @Override 2061 public boolean sendMediaButton(KeyEvent mediaButton) { 2062 boolean handlesMediaButtons = 2063 (mFlags & MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS) != 0; 2064 if (handlesMediaButtons) { 2065 postToHandler(MessageHandler.MSG_MEDIA_BUTTON, mediaButton); 2066 } 2067 return handlesMediaButtons; 2068 } 2069 2070 @Override 2071 public void registerCallbackListener(IMediaControllerCallback cb) { 2072 // If this session is already destroyed tell the caller and 2073 // don't add them. 2074 if (mDestroyed) { 2075 try { 2076 cb.onSessionDestroyed(); 2077 } catch (Exception e) { 2078 // ignored 2079 } 2080 return; 2081 } 2082 mControllerCallbacks.register(cb); 2083 } 2084 2085 @Override 2086 public void unregisterCallbackListener(IMediaControllerCallback cb) { 2087 mControllerCallbacks.unregister(cb); 2088 } 2089 2090 @Override 2091 public String getPackageName() { 2092 // mPackageName is final so doesn't need synchronize block 2093 return mPackageName; 2094 } 2095 2096 @Override 2097 public String getTag() { 2098 // mTag is final so doesn't need synchronize block 2099 return mTag; 2100 } 2101 2102 @Override 2103 public PendingIntent getLaunchPendingIntent() { 2104 synchronized (mLock) { 2105 return mSessionActivity; 2106 } 2107 } 2108 2109 @Override 2110 @SessionFlags 2111 public long getFlags() { 2112 synchronized (mLock) { 2113 return mFlags; 2114 } 2115 } 2116 2117 @Override 2118 public ParcelableVolumeInfo getVolumeAttributes() { 2119 int controlType; 2120 int max; 2121 int current; 2122 int stream; 2123 int volumeType; 2124 synchronized (mLock) { 2125 volumeType = mVolumeType; 2126 stream = mLocalStream; 2127 VolumeProviderCompat vp = mVolumeProvider; 2128 if (volumeType == MediaControllerCompat.PlaybackInfo.PLAYBACK_TYPE_REMOTE) { 2129 controlType = vp.getVolumeControl(); 2130 max = vp.getMaxVolume(); 2131 current = vp.getCurrentVolume(); 2132 } else { 2133 controlType = VolumeProviderCompat.VOLUME_CONTROL_ABSOLUTE; 2134 max = mAudioManager.getStreamMaxVolume(stream); 2135 current = mAudioManager.getStreamVolume(stream); 2136 } 2137 } 2138 return new ParcelableVolumeInfo(volumeType, stream, controlType, max, current); 2139 } 2140 2141 @Override 2142 public void adjustVolume(int direction, int flags, String packageName) { 2143 MediaSessionImplBase.this.adjustVolume(direction, flags); 2144 } 2145 2146 @Override 2147 public void setVolumeTo(int value, int flags, String packageName) { 2148 MediaSessionImplBase.this.setVolumeTo(value, flags); 2149 } 2150 2151 @Override 2152 public void prepare() throws RemoteException { 2153 postToHandler(MessageHandler.MSG_PREPARE); 2154 } 2155 2156 @Override 2157 public void prepareFromMediaId(String mediaId, Bundle extras) throws RemoteException { 2158 postToHandler(MessageHandler.MSG_PREPARE_MEDIA_ID, mediaId, extras); 2159 } 2160 2161 @Override 2162 public void prepareFromSearch(String query, Bundle extras) throws RemoteException { 2163 postToHandler(MessageHandler.MSG_PREPARE_SEARCH, query, extras); 2164 } 2165 2166 @Override 2167 public void prepareFromUri(Uri uri, Bundle extras) throws RemoteException { 2168 postToHandler(MessageHandler.MSG_PREPARE_URI, uri, extras); 2169 } 2170 2171 @Override 2172 public void play() throws RemoteException { 2173 postToHandler(MessageHandler.MSG_PLAY); 2174 } 2175 2176 @Override 2177 public void playFromMediaId(String mediaId, Bundle extras) throws RemoteException { 2178 postToHandler(MessageHandler.MSG_PLAY_MEDIA_ID, mediaId, extras); 2179 } 2180 2181 @Override 2182 public void playFromSearch(String query, Bundle extras) throws RemoteException { 2183 postToHandler(MessageHandler.MSG_PLAY_SEARCH, query, extras); 2184 } 2185 2186 @Override 2187 public void playFromUri(Uri uri, Bundle extras) throws RemoteException { 2188 postToHandler(MessageHandler.MSG_PLAY_URI, uri, extras); 2189 } 2190 2191 @Override 2192 public void skipToQueueItem(long id) { 2193 postToHandler(MessageHandler.MSG_SKIP_TO_ITEM, id); 2194 } 2195 2196 @Override 2197 public void pause() throws RemoteException { 2198 postToHandler(MessageHandler.MSG_PAUSE); 2199 } 2200 2201 @Override 2202 public void stop() throws RemoteException { 2203 postToHandler(MessageHandler.MSG_STOP); 2204 } 2205 2206 @Override 2207 public void next() throws RemoteException { 2208 postToHandler(MessageHandler.MSG_NEXT); 2209 } 2210 2211 @Override 2212 public void previous() throws RemoteException { 2213 postToHandler(MessageHandler.MSG_PREVIOUS); 2214 } 2215 2216 @Override 2217 public void fastForward() throws RemoteException { 2218 postToHandler(MessageHandler.MSG_FAST_FORWARD); 2219 } 2220 2221 @Override 2222 public void rewind() throws RemoteException { 2223 postToHandler(MessageHandler.MSG_REWIND); 2224 } 2225 2226 @Override 2227 public void seekTo(long pos) throws RemoteException { 2228 postToHandler(MessageHandler.MSG_SEEK_TO, pos); 2229 } 2230 2231 @Override 2232 public void rate(RatingCompat rating) throws RemoteException { 2233 postToHandler(MessageHandler.MSG_RATE, rating); 2234 } 2235 2236 @Override 2237 public void setRepeatMode(int repeatMode) throws RemoteException { 2238 postToHandler(MessageHandler.MSG_SET_REPEAT_MODE, repeatMode); 2239 } 2240 2241 @Override 2242 public void setShuffleModeEnabled(boolean enabled) throws RemoteException { 2243 postToHandler(MessageHandler.MSG_SET_SHUFFLE_MODE_ENABLED, enabled); 2244 } 2245 2246 @Override 2247 public void sendCustomAction(String action, Bundle args) 2248 throws RemoteException { 2249 postToHandler(MessageHandler.MSG_CUSTOM_ACTION, action, args); 2250 } 2251 2252 @Override 2253 public MediaMetadataCompat getMetadata() { 2254 return mMetadata; 2255 } 2256 2257 @Override 2258 public PlaybackStateCompat getPlaybackState() { 2259 return getStateWithUpdatedPosition(); 2260 } 2261 2262 @Override 2263 public List<QueueItem> getQueue() { 2264 synchronized (mLock) { 2265 return mQueue; 2266 } 2267 } 2268 2269 @Override 2270 public void addQueueItem(MediaDescriptionCompat description) { 2271 postToHandler(MessageHandler.MSG_ADD_QUEUE_ITEM, description); 2272 } 2273 2274 @Override 2275 public void addQueueItemAt(MediaDescriptionCompat description, int index) { 2276 postToHandler(MessageHandler.MSG_ADD_QUEUE_ITEM_AT, description, index); 2277 } 2278 2279 @Override 2280 public void removeQueueItem(MediaDescriptionCompat description) { 2281 postToHandler(MessageHandler.MSG_REMOVE_QUEUE_ITEM, description); 2282 } 2283 2284 @Override 2285 public void removeQueueItemAt(int index) { 2286 postToHandler(MessageHandler.MSG_REMOVE_QUEUE_ITEM_AT, index); 2287 } 2288 2289 @Override 2290 public CharSequence getQueueTitle() { 2291 return mQueueTitle; 2292 } 2293 2294 @Override 2295 public Bundle getExtras() { 2296 synchronized (mLock) { 2297 return mExtras; 2298 } 2299 } 2300 2301 @Override 2302 @RatingCompat.Style 2303 public int getRatingType() { 2304 return mRatingType; 2305 } 2306 2307 @Override 2308 @PlaybackStateCompat.RepeatMode 2309 public int getRepeatMode() { 2310 return mRepeatMode; 2311 } 2312 2313 @Override 2314 public boolean isShuffleModeEnabled() { 2315 return mShuffleModeEnabled; 2316 } 2317 2318 @Override 2319 public boolean isTransportControlEnabled() { 2320 return (mFlags & FLAG_HANDLES_TRANSPORT_CONTROLS) != 0; 2321 } 2322 } 2323 2324 private static final class Command { 2325 public final String command; 2326 public final Bundle extras; 2327 public final ResultReceiver stub; 2328 2329 public Command(String command, Bundle extras, ResultReceiver stub) { 2330 this.command = command; 2331 this.extras = extras; 2332 this.stub = stub; 2333 } 2334 } 2335 2336 private class MessageHandler extends Handler { 2337 2338 private static final int MSG_COMMAND = 1; 2339 private static final int MSG_ADJUST_VOLUME = 2; 2340 private static final int MSG_PREPARE = 3; 2341 private static final int MSG_PREPARE_MEDIA_ID = 4; 2342 private static final int MSG_PREPARE_SEARCH = 5; 2343 private static final int MSG_PREPARE_URI = 6; 2344 private static final int MSG_PLAY = 7; 2345 private static final int MSG_PLAY_MEDIA_ID = 8; 2346 private static final int MSG_PLAY_SEARCH = 9; 2347 private static final int MSG_PLAY_URI = 10; 2348 private static final int MSG_SKIP_TO_ITEM = 11; 2349 private static final int MSG_PAUSE = 12; 2350 private static final int MSG_STOP = 13; 2351 private static final int MSG_NEXT = 14; 2352 private static final int MSG_PREVIOUS = 15; 2353 private static final int MSG_FAST_FORWARD = 16; 2354 private static final int MSG_REWIND = 17; 2355 private static final int MSG_SEEK_TO = 18; 2356 private static final int MSG_RATE = 19; 2357 private static final int MSG_CUSTOM_ACTION = 20; 2358 private static final int MSG_MEDIA_BUTTON = 21; 2359 private static final int MSG_SET_VOLUME = 22; 2360 private static final int MSG_SET_REPEAT_MODE = 23; 2361 private static final int MSG_SET_SHUFFLE_MODE_ENABLED = 24; 2362 private static final int MSG_ADD_QUEUE_ITEM = 25; 2363 private static final int MSG_ADD_QUEUE_ITEM_AT = 26; 2364 private static final int MSG_REMOVE_QUEUE_ITEM = 27; 2365 private static final int MSG_REMOVE_QUEUE_ITEM_AT = 28; 2366 2367 // KeyEvent constants only available on API 11+ 2368 private static final int KEYCODE_MEDIA_PAUSE = 127; 2369 private static final int KEYCODE_MEDIA_PLAY = 126; 2370 2371 public MessageHandler(Looper looper) { 2372 super(looper); 2373 } 2374 2375 public void post(int what, Object obj, Bundle bundle) { 2376 Message msg = obtainMessage(what, obj); 2377 msg.setData(bundle); 2378 msg.sendToTarget(); 2379 } 2380 2381 public void post(int what, Object obj) { 2382 obtainMessage(what, obj).sendToTarget(); 2383 } 2384 2385 public void post(int what) { 2386 post(what, null); 2387 } 2388 2389 public void post(int what, Object obj, int arg1) { 2390 obtainMessage(what, arg1, 0, obj).sendToTarget(); 2391 } 2392 2393 @Override 2394 public void handleMessage(Message msg) { 2395 MediaSessionCompat.Callback cb = mCallback; 2396 if (cb == null) { 2397 return; 2398 } 2399 switch (msg.what) { 2400 case MSG_COMMAND: 2401 Command cmd = (Command) msg.obj; 2402 cb.onCommand(cmd.command, cmd.extras, cmd.stub); 2403 break; 2404 case MSG_MEDIA_BUTTON: 2405 KeyEvent keyEvent = (KeyEvent) msg.obj; 2406 Intent intent = new Intent(Intent.ACTION_MEDIA_BUTTON); 2407 intent.putExtra(Intent.EXTRA_KEY_EVENT, keyEvent); 2408 // Let the Callback handle events first before using the default behavior 2409 if (!cb.onMediaButtonEvent(intent)) { 2410 onMediaButtonEvent(keyEvent, cb); 2411 } 2412 break; 2413 case MSG_PREPARE: 2414 cb.onPrepare(); 2415 break; 2416 case MSG_PREPARE_MEDIA_ID: 2417 cb.onPrepareFromMediaId((String) msg.obj, msg.getData()); 2418 break; 2419 case MSG_PREPARE_SEARCH: 2420 cb.onPrepareFromSearch((String) msg.obj, msg.getData()); 2421 break; 2422 case MSG_PREPARE_URI: 2423 cb.onPrepareFromUri((Uri) msg.obj, msg.getData()); 2424 break; 2425 case MSG_PLAY: 2426 cb.onPlay(); 2427 break; 2428 case MSG_PLAY_MEDIA_ID: 2429 cb.onPlayFromMediaId((String) msg.obj, msg.getData()); 2430 break; 2431 case MSG_PLAY_SEARCH: 2432 cb.onPlayFromSearch((String) msg.obj, msg.getData()); 2433 break; 2434 case MSG_PLAY_URI: 2435 cb.onPlayFromUri((Uri) msg.obj, msg.getData()); 2436 break; 2437 case MSG_SKIP_TO_ITEM: 2438 cb.onSkipToQueueItem((Long) msg.obj); 2439 break; 2440 case MSG_PAUSE: 2441 cb.onPause(); 2442 break; 2443 case MSG_STOP: 2444 cb.onStop(); 2445 break; 2446 case MSG_NEXT: 2447 cb.onSkipToNext(); 2448 break; 2449 case MSG_PREVIOUS: 2450 cb.onSkipToPrevious(); 2451 break; 2452 case MSG_FAST_FORWARD: 2453 cb.onFastForward(); 2454 break; 2455 case MSG_REWIND: 2456 cb.onRewind(); 2457 break; 2458 case MSG_SEEK_TO: 2459 cb.onSeekTo((Long) msg.obj); 2460 break; 2461 case MSG_RATE: 2462 cb.onSetRating((RatingCompat) msg.obj); 2463 break; 2464 case MSG_CUSTOM_ACTION: 2465 cb.onCustomAction((String) msg.obj, msg.getData()); 2466 break; 2467 case MSG_ADD_QUEUE_ITEM: 2468 cb.onAddQueueItem((MediaDescriptionCompat) msg.obj); 2469 break; 2470 case MSG_ADD_QUEUE_ITEM_AT: 2471 cb.onAddQueueItem((MediaDescriptionCompat) msg.obj, msg.arg1); 2472 break; 2473 case MSG_REMOVE_QUEUE_ITEM: 2474 cb.onRemoveQueueItem((MediaDescriptionCompat) msg.obj); 2475 break; 2476 case MSG_REMOVE_QUEUE_ITEM_AT: 2477 cb.onRemoveQueueItemAt(msg.arg1); 2478 break; 2479 case MSG_ADJUST_VOLUME: 2480 adjustVolume(msg.arg1, 0); 2481 break; 2482 case MSG_SET_VOLUME: 2483 setVolumeTo(msg.arg1, 0); 2484 break; 2485 case MSG_SET_REPEAT_MODE: 2486 cb.onSetRepeatMode(msg.arg1); 2487 break; 2488 case MSG_SET_SHUFFLE_MODE_ENABLED: 2489 cb.onSetShuffleModeEnabled((boolean) msg.obj); 2490 break; 2491 } 2492 } 2493 2494 private void onMediaButtonEvent(KeyEvent ke, MediaSessionCompat.Callback cb) { 2495 if (ke == null || ke.getAction() != KeyEvent.ACTION_DOWN) { 2496 return; 2497 } 2498 long validActions = mState == null ? 0 : mState.getActions(); 2499 switch (ke.getKeyCode()) { 2500 // Note KeyEvent.KEYCODE_MEDIA_PLAY is API 11+ 2501 case KEYCODE_MEDIA_PLAY: 2502 if ((validActions & PlaybackStateCompat.ACTION_PLAY) != 0) { 2503 cb.onPlay(); 2504 } 2505 break; 2506 // Note KeyEvent.KEYCODE_MEDIA_PAUSE is API 11+ 2507 case KEYCODE_MEDIA_PAUSE: 2508 if ((validActions & PlaybackStateCompat.ACTION_PAUSE) != 0) { 2509 cb.onPause(); 2510 } 2511 break; 2512 case KeyEvent.KEYCODE_MEDIA_NEXT: 2513 if ((validActions & PlaybackStateCompat.ACTION_SKIP_TO_NEXT) != 0) { 2514 cb.onSkipToNext(); 2515 } 2516 break; 2517 case KeyEvent.KEYCODE_MEDIA_PREVIOUS: 2518 if ((validActions & PlaybackStateCompat.ACTION_SKIP_TO_PREVIOUS) != 0) { 2519 cb.onSkipToPrevious(); 2520 } 2521 break; 2522 case KeyEvent.KEYCODE_MEDIA_STOP: 2523 if ((validActions & PlaybackStateCompat.ACTION_STOP) != 0) { 2524 cb.onStop(); 2525 } 2526 break; 2527 case KeyEvent.KEYCODE_MEDIA_FAST_FORWARD: 2528 if ((validActions & PlaybackStateCompat.ACTION_FAST_FORWARD) != 0) { 2529 cb.onFastForward(); 2530 } 2531 break; 2532 case KeyEvent.KEYCODE_MEDIA_REWIND: 2533 if ((validActions & PlaybackStateCompat.ACTION_REWIND) != 0) { 2534 cb.onRewind(); 2535 } 2536 break; 2537 case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE: 2538 case KeyEvent.KEYCODE_HEADSETHOOK: 2539 boolean isPlaying = mState != null 2540 && mState.getState() == PlaybackStateCompat.STATE_PLAYING; 2541 boolean canPlay = (validActions & (PlaybackStateCompat.ACTION_PLAY_PAUSE 2542 | PlaybackStateCompat.ACTION_PLAY)) != 0; 2543 boolean canPause = (validActions & (PlaybackStateCompat.ACTION_PLAY_PAUSE 2544 | PlaybackStateCompat.ACTION_PAUSE)) != 0; 2545 if (isPlaying && canPause) { 2546 cb.onPause(); 2547 } else if (!isPlaying && canPlay) { 2548 cb.onPlay(); 2549 } 2550 break; 2551 } 2552 } 2553 } 2554 } 2555 2556 static class MediaSessionImplApi21 implements MediaSessionImpl { 2557 private final Object mSessionObj; 2558 private final Token mToken; 2559 2560 private boolean mDestroyed = false; 2561 private ExtraSession mExtraSessionBinder; 2562 private final RemoteCallbackList<IMediaControllerCallback> mExtraControllerCallbacks = 2563 new RemoteCallbackList<>(); 2564 2565 private PlaybackStateCompat mPlaybackState; 2566 @RatingCompat.Style int mRatingType; 2567 @PlaybackStateCompat.RepeatMode int mRepeatMode; 2568 boolean mShuffleModeEnabled; 2569 2570 public MediaSessionImplApi21(Context context, String tag) { 2571 mSessionObj = MediaSessionCompatApi21.createSession(context, tag); 2572 mToken = new Token(MediaSessionCompatApi21.getSessionToken(mSessionObj)); 2573 } 2574 2575 public MediaSessionImplApi21(Object mediaSession) { 2576 mSessionObj = MediaSessionCompatApi21.verifySession(mediaSession); 2577 mToken = new Token(MediaSessionCompatApi21.getSessionToken(mSessionObj)); 2578 } 2579 2580 @Override 2581 public void setCallback(Callback callback, Handler handler) { 2582 MediaSessionCompatApi21.setCallback(mSessionObj, 2583 callback == null ? null : callback.mCallbackObj, handler); 2584 if (callback != null) { 2585 callback.mSessionImpl = new WeakReference<MediaSessionImpl>(this); 2586 } 2587 } 2588 2589 @Override 2590 public void setFlags(@SessionFlags int flags) { 2591 MediaSessionCompatApi21.setFlags(mSessionObj, flags); 2592 } 2593 2594 @Override 2595 public void setPlaybackToLocal(int stream) { 2596 MediaSessionCompatApi21.setPlaybackToLocal(mSessionObj, stream); 2597 } 2598 2599 @Override 2600 public void setPlaybackToRemote(VolumeProviderCompat volumeProvider) { 2601 MediaSessionCompatApi21.setPlaybackToRemote(mSessionObj, 2602 volumeProvider.getVolumeProvider()); 2603 } 2604 2605 @Override 2606 public void setActive(boolean active) { 2607 MediaSessionCompatApi21.setActive(mSessionObj, active); 2608 } 2609 2610 @Override 2611 public boolean isActive() { 2612 return MediaSessionCompatApi21.isActive(mSessionObj); 2613 } 2614 2615 @Override 2616 public void sendSessionEvent(String event, Bundle extras) { 2617 if (android.os.Build.VERSION.SDK_INT < 23) { 2618 int size = mExtraControllerCallbacks.beginBroadcast(); 2619 for (int i = size - 1; i >= 0; i--) { 2620 IMediaControllerCallback cb = mExtraControllerCallbacks.getBroadcastItem(i); 2621 try { 2622 cb.onEvent(event, extras); 2623 } catch (RemoteException e) { 2624 } 2625 } 2626 mExtraControllerCallbacks.finishBroadcast(); 2627 } 2628 MediaSessionCompatApi21.sendSessionEvent(mSessionObj, event, extras); 2629 } 2630 2631 @Override 2632 public void release() { 2633 mDestroyed = true; 2634 MediaSessionCompatApi21.release(mSessionObj); 2635 } 2636 2637 @Override 2638 public Token getSessionToken() { 2639 return mToken; 2640 } 2641 2642 @Override 2643 public void setPlaybackState(PlaybackStateCompat state) { 2644 mPlaybackState = state; 2645 int size = mExtraControllerCallbacks.beginBroadcast(); 2646 for (int i = size - 1; i >= 0; i--) { 2647 IMediaControllerCallback cb = mExtraControllerCallbacks.getBroadcastItem(i); 2648 try { 2649 cb.onPlaybackStateChanged(state); 2650 } catch (RemoteException e) { 2651 } 2652 } 2653 mExtraControllerCallbacks.finishBroadcast(); 2654 MediaSessionCompatApi21.setPlaybackState(mSessionObj, 2655 state == null ? null : state.getPlaybackState()); 2656 } 2657 2658 @Override 2659 public void setMetadata(MediaMetadataCompat metadata) { 2660 MediaSessionCompatApi21.setMetadata(mSessionObj, 2661 metadata == null ? null : metadata.getMediaMetadata()); 2662 } 2663 2664 @Override 2665 public void setSessionActivity(PendingIntent pi) { 2666 MediaSessionCompatApi21.setSessionActivity(mSessionObj, pi); 2667 } 2668 2669 @Override 2670 public void setMediaButtonReceiver(PendingIntent mbr) { 2671 MediaSessionCompatApi21.setMediaButtonReceiver(mSessionObj, mbr); 2672 } 2673 2674 @Override 2675 public void setQueue(List<QueueItem> queue) { 2676 List<Object> queueObjs = null; 2677 if (queue != null) { 2678 queueObjs = new ArrayList<>(); 2679 for (QueueItem item : queue) { 2680 queueObjs.add(item.getQueueItem()); 2681 } 2682 } 2683 MediaSessionCompatApi21.setQueue(mSessionObj, queueObjs); 2684 } 2685 2686 @Override 2687 public void setQueueTitle(CharSequence title) { 2688 MediaSessionCompatApi21.setQueueTitle(mSessionObj, title); 2689 } 2690 2691 @Override 2692 public void setRatingType(@RatingCompat.Style int type) { 2693 if (android.os.Build.VERSION.SDK_INT < 22) { 2694 mRatingType = type; 2695 } else { 2696 MediaSessionCompatApi22.setRatingType(mSessionObj, type); 2697 } 2698 } 2699 2700 @Override 2701 public void setRepeatMode(@PlaybackStateCompat.RepeatMode int repeatMode) { 2702 if (mRepeatMode != repeatMode) { 2703 mRepeatMode = repeatMode; 2704 int size = mExtraControllerCallbacks.beginBroadcast(); 2705 for (int i = size - 1; i >= 0; i--) { 2706 IMediaControllerCallback cb = mExtraControllerCallbacks.getBroadcastItem(i); 2707 try { 2708 cb.onRepeatModeChanged(repeatMode); 2709 } catch (RemoteException e) { 2710 } 2711 } 2712 mExtraControllerCallbacks.finishBroadcast(); 2713 } 2714 } 2715 2716 @Override 2717 public void setShuffleModeEnabled(boolean enabled) { 2718 if (mShuffleModeEnabled != enabled) { 2719 mShuffleModeEnabled = enabled; 2720 int size = mExtraControllerCallbacks.beginBroadcast(); 2721 for (int i = size - 1; i >= 0; i--) { 2722 IMediaControllerCallback cb = mExtraControllerCallbacks.getBroadcastItem(i); 2723 try { 2724 cb.onShuffleModeChanged(enabled); 2725 } catch (RemoteException e) { 2726 } 2727 } 2728 mExtraControllerCallbacks.finishBroadcast(); 2729 } 2730 } 2731 2732 @Override 2733 public void setExtras(Bundle extras) { 2734 MediaSessionCompatApi21.setExtras(mSessionObj, extras); 2735 } 2736 2737 @Override 2738 public Object getMediaSession() { 2739 return mSessionObj; 2740 } 2741 2742 @Override 2743 public Object getRemoteControlClient() { 2744 return null; 2745 } 2746 2747 @Override 2748 public String getCallingPackage() { 2749 if (android.os.Build.VERSION.SDK_INT < 24) { 2750 return null; 2751 } else { 2752 return MediaSessionCompatApi24.getCallingPackage(mSessionObj); 2753 } 2754 } 2755 2756 ExtraSession getExtraSessionBinder() { 2757 if (mExtraSessionBinder == null) { 2758 mExtraSessionBinder = new ExtraSession(); 2759 } 2760 return mExtraSessionBinder; 2761 } 2762 2763 class ExtraSession extends IMediaSession.Stub { 2764 @Override 2765 public void sendCommand(String command, Bundle args, ResultReceiverWrapper cb) { 2766 // Will not be called. 2767 throw new AssertionError(); 2768 } 2769 2770 @Override 2771 public boolean sendMediaButton(KeyEvent mediaButton) { 2772 // Will not be called. 2773 throw new AssertionError(); 2774 } 2775 2776 @Override 2777 public void registerCallbackListener(IMediaControllerCallback cb) { 2778 if (!mDestroyed) { 2779 mExtraControllerCallbacks.register(cb); 2780 } 2781 } 2782 2783 @Override 2784 public void unregisterCallbackListener(IMediaControllerCallback cb) { 2785 mExtraControllerCallbacks.unregister(cb); 2786 } 2787 2788 @Override 2789 public String getPackageName() { 2790 // Will not be called. 2791 throw new AssertionError(); 2792 } 2793 2794 @Override 2795 public String getTag() { 2796 // Will not be called. 2797 throw new AssertionError(); 2798 } 2799 2800 @Override 2801 public PendingIntent getLaunchPendingIntent() { 2802 // Will not be called. 2803 throw new AssertionError(); 2804 } 2805 2806 @Override 2807 @SessionFlags 2808 public long getFlags() { 2809 // Will not be called. 2810 throw new AssertionError(); 2811 } 2812 2813 @Override 2814 public ParcelableVolumeInfo getVolumeAttributes() { 2815 // Will not be called. 2816 throw new AssertionError(); 2817 } 2818 2819 @Override 2820 public void adjustVolume(int direction, int flags, String packageName) { 2821 // Will not be called. 2822 throw new AssertionError(); 2823 } 2824 2825 @Override 2826 public void setVolumeTo(int value, int flags, String packageName) { 2827 // Will not be called. 2828 throw new AssertionError(); 2829 } 2830 2831 @Override 2832 public void prepare() throws RemoteException { 2833 // Will not be called. 2834 throw new AssertionError(); 2835 } 2836 2837 @Override 2838 public void prepareFromMediaId(String mediaId, Bundle extras) throws RemoteException { 2839 // Will not be called. 2840 throw new AssertionError(); 2841 } 2842 2843 @Override 2844 public void prepareFromSearch(String query, Bundle extras) throws RemoteException { 2845 // Will not be called. 2846 throw new AssertionError(); 2847 } 2848 2849 @Override 2850 public void prepareFromUri(Uri uri, Bundle extras) throws RemoteException { 2851 // Will not be called. 2852 throw new AssertionError(); 2853 } 2854 2855 @Override 2856 public void play() throws RemoteException { 2857 // Will not be called. 2858 throw new AssertionError(); 2859 } 2860 2861 @Override 2862 public void playFromMediaId(String mediaId, Bundle extras) throws RemoteException { 2863 // Will not be called. 2864 throw new AssertionError(); 2865 } 2866 2867 @Override 2868 public void playFromSearch(String query, Bundle extras) throws RemoteException { 2869 // Will not be called. 2870 throw new AssertionError(); 2871 } 2872 2873 @Override 2874 public void playFromUri(Uri uri, Bundle extras) throws RemoteException { 2875 // Will not be called. 2876 throw new AssertionError(); 2877 } 2878 2879 @Override 2880 public void skipToQueueItem(long id) { 2881 // Will not be called. 2882 throw new AssertionError(); 2883 } 2884 2885 @Override 2886 public void pause() throws RemoteException { 2887 // Will not be called. 2888 throw new AssertionError(); 2889 } 2890 2891 @Override 2892 public void stop() throws RemoteException { 2893 // Will not be called. 2894 throw new AssertionError(); 2895 } 2896 2897 @Override 2898 public void next() throws RemoteException { 2899 // Will not be called. 2900 throw new AssertionError(); 2901 } 2902 2903 @Override 2904 public void previous() throws RemoteException { 2905 // Will not be called. 2906 throw new AssertionError(); 2907 } 2908 2909 @Override 2910 public void fastForward() throws RemoteException { 2911 // Will not be called. 2912 throw new AssertionError(); 2913 } 2914 2915 @Override 2916 public void rewind() throws RemoteException { 2917 // Will not be called. 2918 throw new AssertionError(); 2919 } 2920 2921 @Override 2922 public void seekTo(long pos) throws RemoteException { 2923 // Will not be called. 2924 throw new AssertionError(); 2925 } 2926 2927 @Override 2928 public void rate(RatingCompat rating) throws RemoteException { 2929 // Will not be called. 2930 throw new AssertionError(); 2931 } 2932 2933 @Override 2934 public void setRepeatMode(int repeatMode) throws RemoteException { 2935 // Will not be called. 2936 throw new AssertionError(); 2937 } 2938 2939 @Override 2940 public void setShuffleModeEnabled(boolean enabled) throws RemoteException { 2941 // Will not be called. 2942 throw new AssertionError(); 2943 } 2944 2945 @Override 2946 public void sendCustomAction(String action, Bundle args) throws RemoteException { 2947 // Will not be called. 2948 throw new AssertionError(); 2949 } 2950 2951 @Override 2952 public MediaMetadataCompat getMetadata() { 2953 // Will not be called. 2954 throw new AssertionError(); 2955 } 2956 2957 @Override 2958 public PlaybackStateCompat getPlaybackState() { 2959 return mPlaybackState; 2960 } 2961 2962 @Override 2963 public List<QueueItem> getQueue() { 2964 // Will not be called. 2965 return null; 2966 } 2967 2968 @Override 2969 public void addQueueItem(MediaDescriptionCompat descriptionCompat) { 2970 // Will not be called. 2971 throw new AssertionError(); 2972 } 2973 2974 @Override 2975 public void addQueueItemAt(MediaDescriptionCompat descriptionCompat, int index) { 2976 // Will not be called. 2977 throw new AssertionError(); 2978 } 2979 2980 @Override 2981 public void removeQueueItem(MediaDescriptionCompat description) { 2982 // Will not be called. 2983 throw new AssertionError(); 2984 } 2985 2986 @Override 2987 public void removeQueueItemAt(int index) { 2988 // Will not be called. 2989 throw new AssertionError(); 2990 } 2991 2992 @Override 2993 public CharSequence getQueueTitle() { 2994 // Will not be called. 2995 throw new AssertionError(); 2996 } 2997 2998 @Override 2999 public Bundle getExtras() { 3000 // Will not be called. 3001 throw new AssertionError(); 3002 } 3003 3004 @Override 3005 @RatingCompat.Style 3006 public int getRatingType() { 3007 return mRatingType; 3008 } 3009 3010 @Override 3011 @PlaybackStateCompat.RepeatMode 3012 public int getRepeatMode() { 3013 return mRepeatMode; 3014 } 3015 3016 @Override 3017 public boolean isShuffleModeEnabled() { 3018 return mShuffleModeEnabled; 3019 } 3020 3021 @Override 3022 public boolean isTransportControlEnabled() { 3023 // Will not be called. 3024 throw new AssertionError(); 3025 } 3026 } 3027 } 3028} 3029