androidx/media/SessionCommand2.java - platform/prebuilts/fullsdk/sources/android-28 - Git at Google

 /*
  * Copyright 2018 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package androidx.media;

 import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP;

 import android.net.Uri;
 import android.os.Bundle;
 import android.text.TextUtils;

 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.RestrictTo;
 import androidx.media.MediaSession2.ControllerInfo;
 import androidx.media.MediaSession2.SessionCallback;

 import java.util.List;

 /**
  * Define a command that a {@link MediaController2} can send to a {@link MediaSession2}.
  * <p>
  * If {@link #getCommandCode()} isn't {@link #COMMAND_CODE_CUSTOM}), it's predefined command.
  * If {@link #getCommandCode()} is {@link #COMMAND_CODE_CUSTOM}), it's custom command and
  * {@link #getCustomCommand()} shouldn't be {@code null}.
  */
 public final class SessionCommand2 {
     /**
      * Command code for the custom command which can be defined by string action in the
      * {@link SessionCommand2}.
      */
     public static final int COMMAND_CODE_CUSTOM = 0;

     /**
      * Command code for {@link MediaController2#play()}.
      * <p>
      * Command would be sent directly to the player if the session doesn't reject the request
      * through the {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo,
      * SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYBACK_PLAY = 1;

     /**
      * Command code for {@link MediaController2#pause()}.
      * <p>
      * Command would be sent directly to the player if the session doesn't reject the request
      * through the {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo,
      * SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYBACK_PAUSE = 2;

     /**
      * Command code for {@link MediaController2#reset()}.
      * <p>
      * Command would be sent directly to the player if the session doesn't reject the request
      * through the {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo,
      * SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYBACK_RESET = 3;

     /**
      * Command code for {@link MediaController2#skipToNextItem()}.
      * <p>
      * Command would be sent directly to the playlist agent if the session doesn't reject the
      * request through the {@link SessionCallback#onCommandRequest(
      * MediaSession2, ControllerInfo, SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYLIST_SKIP_TO_NEXT_ITEM = 4;

     /**
      * Command code for {@link MediaController2#skipToPreviousItem()}.
      * <p>
      * Command would be sent directly to the playlist agent if the session doesn't reject the
      * request through the {@link SessionCallback#onCommandRequest(
      * MediaSession2, ControllerInfo, SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYLIST_SKIP_TO_PREV_ITEM = 5;

     /**
      * Command code for {@link MediaController2#prepare()}.
      * <p>
      * Command would be sent directly to the player if the session doesn't reject the request
      * through the {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo,
      * SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYBACK_PREPARE = 6;

     /**
      * Command code for {@link MediaController2#fastForward()}.
      */
     public static final int COMMAND_CODE_SESSION_FAST_FORWARD = 7;

     /**
      * Command code for {@link MediaController2#rewind()}.
      */
     public static final int COMMAND_CODE_SESSION_REWIND = 8;

     /**
      * Command code for {@link MediaController2#seekTo(long)}.
      * <p>
      * Command would be sent directly to the player if the session doesn't reject the request
      * through the {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo,
      * SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYBACK_SEEK_TO = 9;

     /**
      * Command code for both {@link MediaController2#setVolumeTo(int, int)}.
      * <p>
      * Command would set the device volume or send to the volume provider directly if the session
      * doesn't reject the request through the
      * {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
      */
     public static final int COMMAND_CODE_VOLUME_SET_VOLUME = 10;

     /**
      * Command code for both {@link MediaController2#adjustVolume(int, int)}.
      * <p>
      * Command would adjust the device volume or send to the volume provider directly if the session
      * doesn't reject the request through the
      * {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
      */
     public static final int COMMAND_CODE_VOLUME_ADJUST_VOLUME = 11;

     /**
      * Command code for {@link MediaController2#skipToPlaylistItem(MediaItem2)}.
      * <p>
      * Command would be sent directly to the playlist agent if the session doesn't reject the
      * request through the
      * {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYLIST_SKIP_TO_PLAYLIST_ITEM = 12;

     /**
      * Command code for {@link MediaController2#setShuffleMode(int)}.
      * <p>
      * Command would be sent directly to the playlist agent if the session doesn't reject the
      * request through the
      * {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYLIST_SET_SHUFFLE_MODE = 13;

     /**
      * Command code for {@link MediaController2#setRepeatMode(int)}.
      * <p>
      * Command would be sent directly to the playlist agent if the session doesn't reject the
      * request through the
      * {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYLIST_SET_REPEAT_MODE = 14;

     /**
      * Command code for {@link MediaController2#addPlaylistItem(int, MediaItem2)}.
      * <p>
      * Command would be sent directly to the playlist agent if the session doesn't reject the
      * request through the
      * {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYLIST_ADD_ITEM = 15;

     /**
      * Command code for {@link MediaController2#addPlaylistItem(int, MediaItem2)}.
      * <p>
      * Command would be sent directly to the playlist agent if the session doesn't reject the
      * request through the
      * {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYLIST_REMOVE_ITEM = 16;

     /**
      * Command code for {@link MediaController2#replacePlaylistItem(int, MediaItem2)}.
      * <p>
      * Command would be sent directly to the playlist agent if the session doesn't reject the
      * request through the
      * {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYLIST_REPLACE_ITEM = 17;

     /**
      * Command code for {@link MediaController2#getPlaylist()}. This will expose metadata
      * information to the controller.
      */
     public static final int COMMAND_CODE_PLAYLIST_GET_LIST = 18;

     /**
      * Command code for {@link MediaController2#setPlaylist(List, MediaMetadata2)}.
      * <p>
      * Command would be sent directly to the playlist agent if the session doesn't reject the
      * request through the
      * {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYLIST_SET_LIST = 19;

     /**
      * Command code for {@link MediaController2#getPlaylistMetadata()}. This will expose
      * metadata information to the controller.
      */
     public static final int COMMAND_CODE_PLAYLIST_GET_LIST_METADATA = 20;

     /**
      * Command code for {@link MediaController2#updatePlaylistMetadata(MediaMetadata2)}.
      * <p>
      * Command would be sent directly to the playlist agent if the session doesn't reject the
      * request through the
      * {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYLIST_SET_LIST_METADATA = 21;

     /**
      * Command code for {@link MediaController2#getCurrentMediaItem()}. This will expose
      * metadata information to the controller.
      */
     public static final int COMMAND_CODE_PLAYLIST_GET_CURRENT_MEDIA_ITEM = 20;

     /**
      * Command code for {@link MediaController2#playFromMediaId(String, Bundle)}.
      */
     public static final int COMMAND_CODE_SESSION_PLAY_FROM_MEDIA_ID = 22;

     /**
      * Command code for {@link MediaController2#playFromUri(Uri, Bundle)}.
      */
     public static final int COMMAND_CODE_SESSION_PLAY_FROM_URI = 23;

     /**
      * Command code for {@link MediaController2#playFromSearch(String, Bundle)}.
      */
     public static final int COMMAND_CODE_SESSION_PLAY_FROM_SEARCH = 24;

     /**
      * Command code for {@link MediaController2#prepareFromMediaId(String, Bundle)}.
      */
     public static final int COMMAND_CODE_SESSION_PREPARE_FROM_MEDIA_ID = 25;

     /**
      * Command code for {@link MediaController2#prepareFromUri(Uri, Bundle)}.
      */
     public static final int COMMAND_CODE_SESSION_PREPARE_FROM_URI = 26;

     /**
      * Command code for {@link MediaController2#prepareFromSearch(String, Bundle)}.
      */
     public static final int COMMAND_CODE_SESSION_PREPARE_FROM_SEARCH = 27;

     /**
      * Command code for {@link MediaController2#setRating(String, Rating2)}.
      */
     public static final int COMMAND_CODE_SESSION_SET_RATING = 28;

     /**
      * Command code for {@link MediaController2#subscribeRoutesInfo()}
      */
     public static final int COMMAND_CODE_SESSION_SUBSCRIBE_ROUTES_INFO = 36;

     /**
      * Command code for {@link MediaController2#unsubscribeRoutesInfo()}
      */
     public static final int COMMAND_CODE_SESSION_UNSUBSCRIBE_ROUTES_INFO = 37;

     /**
      * Command code for {@link MediaController2#selectRoute(Bundle)}}
      */
     public static final int COMMAND_CODE_SESSION_SELECT_ROUTE = 38;

     /**
      * @hide
      * Command code for {@link MediaBrowser2#getChildren(String, int, int, Bundle)}.
      */
     @RestrictTo(LIBRARY_GROUP)
     public static final int COMMAND_CODE_LIBRARY_GET_CHILDREN = 29;

     /**
      * @hide
      * Command code for {@link MediaBrowser2#getItem(String)}.
      */
     @RestrictTo(LIBRARY_GROUP)
     public static final int COMMAND_CODE_LIBRARY_GET_ITEM = 30;

     /**
      * @hide
      * Command code for {@link MediaBrowser2#getLibraryRoot(Bundle)}.
      */
     @RestrictTo(LIBRARY_GROUP)
     public static final int COMMAND_CODE_LIBRARY_GET_LIBRARY_ROOT = 31;

     /**
      * @hide
      * Command code for {@link MediaBrowser2#getSearchResult(String, int, int, Bundle)}.
      */
     @RestrictTo(LIBRARY_GROUP)
     public static final int COMMAND_CODE_LIBRARY_GET_SEARCH_RESULT = 32;

     /**
      * @hide
      * Command code for {@link MediaBrowser2#search(String, Bundle)}.
      */
     @RestrictTo(LIBRARY_GROUP)
     public static final int COMMAND_CODE_LIBRARY_SEARCH = 33;

     /**
      * @hide
      * Command code for {@link MediaBrowser2#subscribe(String, Bundle)}.
      */
     @RestrictTo(LIBRARY_GROUP)
     public static final int COMMAND_CODE_LIBRARY_SUBSCRIBE = 34;

     /**
      * @hide
      * Command code for {@link MediaBrowser2#unsubscribe(String)}.
      */
     @RestrictTo(LIBRARY_GROUP)
     public static final int COMMAND_CODE_LIBRARY_UNSUBSCRIBE = 35;

     /**
      * Command code for {@link MediaController2#setPlaybackSpeed(float)}}.
      * <p>
      * Command would be sent directly to the player if the session doesn't reject the request
      * through the {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo,
      * SessionCommand2)}.
      */
     public static final int COMMAND_CODE_PLAYBACK_SET_SPEED = 39;

     private static final String KEY_COMMAND_CODE =
             "android.media.media_session2.command.command_code";
     private static final String KEY_COMMAND_CUSTOM_COMMAND =
             "android.media.media_session2.command.custom_command";
     private static final String KEY_COMMAND_EXTRAS =
             "android.media.media_session2.command.extras";

     private final int mCommandCode;
     // Nonnull if it's custom command
     private final String mCustomCommand;
     private final Bundle mExtras;

     /**
      * Constructor for creating a predefined command.
      *
      * @param commandCode A command code for predefined command.
      */
     public SessionCommand2(int commandCode) {
         if (commandCode == COMMAND_CODE_CUSTOM) {
             throw new IllegalArgumentException("commandCode shouldn't be COMMAND_CODE_CUSTOM");
         }
         mCommandCode = commandCode;
         mCustomCommand = null;
         mExtras = null;
     }

     /**
      * Constructor for creating a custom command.
      *
      * @param action The action of this custom command.
      * @param extras An extra bundle for this custom command.
      */
     public SessionCommand2(@NonNull String action, @Nullable Bundle extras) {
         if (action == null) {
             throw new IllegalArgumentException("action shouldn't be null");
         }
         mCommandCode = COMMAND_CODE_CUSTOM;
         mCustomCommand = action;
         mExtras = extras;
     }

     /**
      * Gets the command code of a predefined command.
      * This will return {@link #COMMAND_CODE_CUSTOM} for a custom command.
      */
     public int getCommandCode() {
         return mCommandCode;
     }

     /**
      * Gets the action of a custom command.
      * This will return {@code null} for a predefined command.
      */
     public @Nullable String getCustomCommand() {
         return mCustomCommand;
     }

     /**
      * Gets the extra bundle of a custom command.
      * This will return {@code null} for a predefined command.
      */
     public @Nullable Bundle getExtras() {
         return mExtras;
     }

     /**
      * @return a new {@link Bundle} instance from the command
      * @hide
      */
     @RestrictTo(LIBRARY_GROUP)
     public Bundle toBundle() {
         Bundle bundle = new Bundle();
         bundle.putInt(KEY_COMMAND_CODE, mCommandCode);
         bundle.putString(KEY_COMMAND_CUSTOM_COMMAND, mCustomCommand);
         bundle.putBundle(KEY_COMMAND_EXTRAS, mExtras);
         return bundle;
     }

     /**
      * @return a new {@link SessionCommand2} instance from the Bundle
      * @hide
      */
     @RestrictTo(LIBRARY_GROUP)
     public static SessionCommand2 fromBundle(@NonNull Bundle command) {
         if (command == null) {
             throw new IllegalArgumentException("command shouldn't be null");
         }
         int code = command.getInt(KEY_COMMAND_CODE);
         if (code != COMMAND_CODE_CUSTOM) {
             return new SessionCommand2(code);
         } else {
             String customCommand = command.getString(KEY_COMMAND_CUSTOM_COMMAND);
             if (customCommand == null) {
                 return null;
             }
             return new SessionCommand2(customCommand, command.getBundle(KEY_COMMAND_EXTRAS));
         }
     }

     @Override
     public boolean equals(Object obj) {
         if (!(obj instanceof SessionCommand2)) {
             return false;
         }
         SessionCommand2 other = (SessionCommand2) obj;
         return mCommandCode == other.mCommandCode
                 && TextUtils.equals(mCustomCommand, other.mCustomCommand);
     }

     @Override
     public int hashCode() {
         final int prime = 31;
         return ((mCustomCommand != null) ? mCustomCommand.hashCode() : 0) * prime + mCommandCode;
     }
 }
	/*
	* Copyright 2018 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package androidx.media;

	import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP;

	import android.net.Uri;
	import android.os.Bundle;
	import android.text.TextUtils;

	import androidx.annotation.NonNull;
	import androidx.annotation.Nullable;
	import androidx.annotation.RestrictTo;
	import androidx.media.MediaSession2.ControllerInfo;
	import androidx.media.MediaSession2.SessionCallback;

	import java.util.List;

	/**
	* Define a command that a {@link MediaController2} can send to a {@link MediaSession2}.
	* <p>
	* If {@link #getCommandCode()} isn't {@link #COMMAND_CODE_CUSTOM}), it's predefined command.
	* If {@link #getCommandCode()} is {@link #COMMAND_CODE_CUSTOM}), it's custom command and
	* {@link #getCustomCommand()} shouldn't be {@code null}.
	*/
	public final class SessionCommand2 {
	/**
	* Command code for the custom command which can be defined by string action in the
	* {@link SessionCommand2}.
	*/
	public static final int COMMAND_CODE_CUSTOM = 0;

	/**
	* Command code for {@link MediaController2#play()}.
	* <p>
	* Command would be sent directly to the player if the session doesn't reject the request
	* through the {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo,
	* SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYBACK_PLAY = 1;

	/**
	* Command code for {@link MediaController2#pause()}.
	* <p>
	* Command would be sent directly to the player if the session doesn't reject the request
	* through the {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo,
	* SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYBACK_PAUSE = 2;

	/**
	* Command code for {@link MediaController2#reset()}.
	* <p>
	* Command would be sent directly to the player if the session doesn't reject the request
	* through the {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo,
	* SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYBACK_RESET = 3;

	/**
	* Command code for {@link MediaController2#skipToNextItem()}.
	* <p>
	* Command would be sent directly to the playlist agent if the session doesn't reject the
	* request through the {@link SessionCallback#onCommandRequest(
	* MediaSession2, ControllerInfo, SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYLIST_SKIP_TO_NEXT_ITEM = 4;

	/**
	* Command code for {@link MediaController2#skipToPreviousItem()}.
	* <p>
	* Command would be sent directly to the playlist agent if the session doesn't reject the
	* request through the {@link SessionCallback#onCommandRequest(
	* MediaSession2, ControllerInfo, SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYLIST_SKIP_TO_PREV_ITEM = 5;

	/**
	* Command code for {@link MediaController2#prepare()}.
	* <p>
	* Command would be sent directly to the player if the session doesn't reject the request
	* through the {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo,
	* SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYBACK_PREPARE = 6;

	/**
	* Command code for {@link MediaController2#fastForward()}.
	*/
	public static final int COMMAND_CODE_SESSION_FAST_FORWARD = 7;

	/**
	* Command code for {@link MediaController2#rewind()}.
	*/
	public static final int COMMAND_CODE_SESSION_REWIND = 8;

	/**
	* Command code for {@link MediaController2#seekTo(long)}.
	* <p>
	* Command would be sent directly to the player if the session doesn't reject the request
	* through the {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo,
	* SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYBACK_SEEK_TO = 9;

	/**
	* Command code for both {@link MediaController2#setVolumeTo(int, int)}.
	* <p>
	* Command would set the device volume or send to the volume provider directly if the session
	* doesn't reject the request through the
	* {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_VOLUME_SET_VOLUME = 10;

	/**
	* Command code for both {@link MediaController2#adjustVolume(int, int)}.
	* <p>
	* Command would adjust the device volume or send to the volume provider directly if the session
	* doesn't reject the request through the
	* {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_VOLUME_ADJUST_VOLUME = 11;

	/**
	* Command code for {@link MediaController2#skipToPlaylistItem(MediaItem2)}.
	* <p>
	* Command would be sent directly to the playlist agent if the session doesn't reject the
	* request through the
	* {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYLIST_SKIP_TO_PLAYLIST_ITEM = 12;

	/**
	* Command code for {@link MediaController2#setShuffleMode(int)}.
	* <p>
	* Command would be sent directly to the playlist agent if the session doesn't reject the
	* request through the
	* {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYLIST_SET_SHUFFLE_MODE = 13;

	/**
	* Command code for {@link MediaController2#setRepeatMode(int)}.
	* <p>
	* Command would be sent directly to the playlist agent if the session doesn't reject the
	* request through the
	* {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYLIST_SET_REPEAT_MODE = 14;

	/**
	* Command code for {@link MediaController2#addPlaylistItem(int, MediaItem2)}.
	* <p>
	* Command would be sent directly to the playlist agent if the session doesn't reject the
	* request through the
	* {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYLIST_ADD_ITEM = 15;

	/**
	* Command code for {@link MediaController2#addPlaylistItem(int, MediaItem2)}.
	* <p>
	* Command would be sent directly to the playlist agent if the session doesn't reject the
	* request through the
	* {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYLIST_REMOVE_ITEM = 16;

	/**
	* Command code for {@link MediaController2#replacePlaylistItem(int, MediaItem2)}.
	* <p>
	* Command would be sent directly to the playlist agent if the session doesn't reject the
	* request through the
	* {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYLIST_REPLACE_ITEM = 17;

	/**
	* Command code for {@link MediaController2#getPlaylist()}. This will expose metadata
	* information to the controller.
	*/
	public static final int COMMAND_CODE_PLAYLIST_GET_LIST = 18;

	/**
	* Command code for {@link MediaController2#setPlaylist(List, MediaMetadata2)}.
	* <p>
	* Command would be sent directly to the playlist agent if the session doesn't reject the
	* request through the
	* {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYLIST_SET_LIST = 19;

	/**
	* Command code for {@link MediaController2#getPlaylistMetadata()}. This will expose
	* metadata information to the controller.
	*/
	public static final int COMMAND_CODE_PLAYLIST_GET_LIST_METADATA = 20;

	/**
	* Command code for {@link MediaController2#updatePlaylistMetadata(MediaMetadata2)}.
	* <p>
	* Command would be sent directly to the playlist agent if the session doesn't reject the
	* request through the
	* {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo, SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYLIST_SET_LIST_METADATA = 21;

	/**
	* Command code for {@link MediaController2#getCurrentMediaItem()}. This will expose
	* metadata information to the controller.
	*/
	public static final int COMMAND_CODE_PLAYLIST_GET_CURRENT_MEDIA_ITEM = 20;

	/**
	* Command code for {@link MediaController2#playFromMediaId(String, Bundle)}.
	*/
	public static final int COMMAND_CODE_SESSION_PLAY_FROM_MEDIA_ID = 22;

	/**
	* Command code for {@link MediaController2#playFromUri(Uri, Bundle)}.
	*/
	public static final int COMMAND_CODE_SESSION_PLAY_FROM_URI = 23;

	/**
	* Command code for {@link MediaController2#playFromSearch(String, Bundle)}.
	*/
	public static final int COMMAND_CODE_SESSION_PLAY_FROM_SEARCH = 24;

	/**
	* Command code for {@link MediaController2#prepareFromMediaId(String, Bundle)}.
	*/
	public static final int COMMAND_CODE_SESSION_PREPARE_FROM_MEDIA_ID = 25;

	/**
	* Command code for {@link MediaController2#prepareFromUri(Uri, Bundle)}.
	*/
	public static final int COMMAND_CODE_SESSION_PREPARE_FROM_URI = 26;

	/**
	* Command code for {@link MediaController2#prepareFromSearch(String, Bundle)}.
	*/
	public static final int COMMAND_CODE_SESSION_PREPARE_FROM_SEARCH = 27;

	/**
	* Command code for {@link MediaController2#setRating(String, Rating2)}.
	*/
	public static final int COMMAND_CODE_SESSION_SET_RATING = 28;

	/**
	* Command code for {@link MediaController2#subscribeRoutesInfo()}
	*/
	public static final int COMMAND_CODE_SESSION_SUBSCRIBE_ROUTES_INFO = 36;

	/**
	* Command code for {@link MediaController2#unsubscribeRoutesInfo()}
	*/
	public static final int COMMAND_CODE_SESSION_UNSUBSCRIBE_ROUTES_INFO = 37;

	/**
	* Command code for {@link MediaController2#selectRoute(Bundle)}}
	*/
	public static final int COMMAND_CODE_SESSION_SELECT_ROUTE = 38;

	/**
	* @hide
	* Command code for {@link MediaBrowser2#getChildren(String, int, int, Bundle)}.
	*/
	@RestrictTo(LIBRARY_GROUP)
	public static final int COMMAND_CODE_LIBRARY_GET_CHILDREN = 29;

	/**
	* @hide
	* Command code for {@link MediaBrowser2#getItem(String)}.
	*/
	@RestrictTo(LIBRARY_GROUP)
	public static final int COMMAND_CODE_LIBRARY_GET_ITEM = 30;

	/**
	* @hide
	* Command code for {@link MediaBrowser2#getLibraryRoot(Bundle)}.
	*/
	@RestrictTo(LIBRARY_GROUP)
	public static final int COMMAND_CODE_LIBRARY_GET_LIBRARY_ROOT = 31;

	/**
	* @hide
	* Command code for {@link MediaBrowser2#getSearchResult(String, int, int, Bundle)}.
	*/
	@RestrictTo(LIBRARY_GROUP)
	public static final int COMMAND_CODE_LIBRARY_GET_SEARCH_RESULT = 32;

	/**
	* @hide
	* Command code for {@link MediaBrowser2#search(String, Bundle)}.
	*/
	@RestrictTo(LIBRARY_GROUP)
	public static final int COMMAND_CODE_LIBRARY_SEARCH = 33;

	/**
	* @hide
	* Command code for {@link MediaBrowser2#subscribe(String, Bundle)}.
	*/
	@RestrictTo(LIBRARY_GROUP)
	public static final int COMMAND_CODE_LIBRARY_SUBSCRIBE = 34;

	/**
	* @hide
	* Command code for {@link MediaBrowser2#unsubscribe(String)}.
	*/
	@RestrictTo(LIBRARY_GROUP)
	public static final int COMMAND_CODE_LIBRARY_UNSUBSCRIBE = 35;

	/**
	* Command code for {@link MediaController2#setPlaybackSpeed(float)}}.
	* <p>
	* Command would be sent directly to the player if the session doesn't reject the request
	* through the {@link SessionCallback#onCommandRequest(MediaSession2, ControllerInfo,
	* SessionCommand2)}.
	*/
	public static final int COMMAND_CODE_PLAYBACK_SET_SPEED = 39;

	private static final String KEY_COMMAND_CODE =
	"android.media.media_session2.command.command_code";
	private static final String KEY_COMMAND_CUSTOM_COMMAND =
	"android.media.media_session2.command.custom_command";
	private static final String KEY_COMMAND_EXTRAS =
	"android.media.media_session2.command.extras";

	private final int mCommandCode;
	// Nonnull if it's custom command
	private final String mCustomCommand;
	private final Bundle mExtras;

	/**
	* Constructor for creating a predefined command.
	*
	* @param commandCode A command code for predefined command.
	*/
	public SessionCommand2(int commandCode) {
	if (commandCode == COMMAND_CODE_CUSTOM) {
	throw new IllegalArgumentException("commandCode shouldn't be COMMAND_CODE_CUSTOM");
	}
	mCommandCode = commandCode;
	mCustomCommand = null;
	mExtras = null;
	}

	/**
	* Constructor for creating a custom command.
	*
	* @param action The action of this custom command.
	* @param extras An extra bundle for this custom command.
	*/
	public SessionCommand2(@NonNull String action, @Nullable Bundle extras) {
	if (action == null) {
	throw new IllegalArgumentException("action shouldn't be null");
	}
	mCommandCode = COMMAND_CODE_CUSTOM;
	mCustomCommand = action;
	mExtras = extras;
	}

	/**
	* Gets the command code of a predefined command.
	* This will return {@link #COMMAND_CODE_CUSTOM} for a custom command.
	*/
	public int getCommandCode() {
	return mCommandCode;
	}

	/**
	* Gets the action of a custom command.
	* This will return {@code null} for a predefined command.
	*/
	public @Nullable String getCustomCommand() {
	return mCustomCommand;
	}

	/**
	* Gets the extra bundle of a custom command.
	* This will return {@code null} for a predefined command.
	*/
	public @Nullable Bundle getExtras() {
	return mExtras;
	}

	/**
	* @return a new {@link Bundle} instance from the command
	* @hide
	*/
	@RestrictTo(LIBRARY_GROUP)
	public Bundle toBundle() {
	Bundle bundle = new Bundle();
	bundle.putInt(KEY_COMMAND_CODE, mCommandCode);
	bundle.putString(KEY_COMMAND_CUSTOM_COMMAND, mCustomCommand);
	bundle.putBundle(KEY_COMMAND_EXTRAS, mExtras);
	return bundle;
	}

	/**
	* @return a new {@link SessionCommand2} instance from the Bundle
	* @hide
	*/
	@RestrictTo(LIBRARY_GROUP)
	public static SessionCommand2 fromBundle(@NonNull Bundle command) {
	if (command == null) {
	throw new IllegalArgumentException("command shouldn't be null");
	}
	int code = command.getInt(KEY_COMMAND_CODE);
	if (code != COMMAND_CODE_CUSTOM) {
	return new SessionCommand2(code);
	} else {
	String customCommand = command.getString(KEY_COMMAND_CUSTOM_COMMAND);
	if (customCommand == null) {
	return null;
	}
	return new SessionCommand2(customCommand, command.getBundle(KEY_COMMAND_EXTRAS));
	}
	}

	@Override
	public boolean equals(Object obj) {
	if (!(obj instanceof SessionCommand2)) {
	return false;
	}
	SessionCommand2 other = (SessionCommand2) obj;
	return mCommandCode == other.mCommandCode
	&& TextUtils.equals(mCustomCommand, other.mCustomCommand);
	}

	@Override
	public int hashCode() {
	final int prime = 31;
	return ((mCustomCommand != null) ? mCustomCommand.hashCode() : 0) * prime + mCommandCode;
	}
	}