1 /* 2 * Copyright 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package androidx.media; 17 18 import android.os.Bundle; 19 import android.support.v4.media.MediaBrowserCompat; 20 21 import androidx.annotation.RestrictTo; 22 23 /** 24 * Defines the communication protocol for media browsers and media browser services. 25 * 26 * @hide 27 */ 28 @RestrictTo(RestrictTo.Scope.LIBRARY) 29 public class MediaBrowserProtocol { 30 31 public static final String DATA_CALLBACK_TOKEN = "data_callback_token"; 32 public static final String DATA_CALLING_UID = "data_calling_uid"; 33 public static final String DATA_CALLING_PID = "data_calling_pid"; 34 public static final String DATA_MEDIA_ITEM_ID = "data_media_item_id"; 35 public static final String DATA_MEDIA_ITEM_LIST = "data_media_item_list"; 36 public static final String DATA_MEDIA_SESSION_TOKEN = "data_media_session_token"; 37 public static final String DATA_OPTIONS = "data_options"; 38 public static final String DATA_NOTIFY_CHILDREN_CHANGED_OPTIONS = 39 "data_notify_children_changed_options"; 40 public static final String DATA_PACKAGE_NAME = "data_package_name"; 41 public static final String DATA_RESULT_RECEIVER = "data_result_receiver"; 42 public static final String DATA_ROOT_HINTS = "data_root_hints"; 43 public static final String DATA_SEARCH_EXTRAS = "data_search_extras"; 44 public static final String DATA_SEARCH_QUERY = "data_search_query"; 45 public static final String DATA_CUSTOM_ACTION = "data_custom_action"; 46 public static final String DATA_CUSTOM_ACTION_EXTRAS = "data_custom_action_extras"; 47 48 public static final String EXTRA_CLIENT_VERSION = "extra_client_version"; 49 public static final String EXTRA_SERVICE_VERSION = "extra_service_version"; 50 public static final String EXTRA_MESSENGER_BINDER = "extra_messenger"; 51 public static final String EXTRA_SESSION_BINDER = "extra_session_binder"; 52 53 /** 54 * MediaBrowserCompat will check the version of the connected MediaBrowserServiceCompat, 55 * and it will not send messages if they are introduced in the higher version of the 56 * MediaBrowserServiceCompat. 57 */ 58 public static final int SERVICE_VERSION_1 = 1; 59 60 /** 61 * To prevent ClassNotFoundException from Parcelables, MediaBrowser(Service)Compat tries to 62 * avoid using framework code as much as possible (b/62648808). For backward compatibility, 63 * service v2 is introduced so that the browser can distinguish whether the service supports 64 * subscribing through compat code. 65 */ 66 public static final int SERVICE_VERSION_2 = 2; 67 public static final int SERVICE_VERSION_CURRENT = SERVICE_VERSION_2; 68 69 /* 70 * Messages sent from the media browser service compat to the media browser compat. 71 * (Compat implementation for IMediaBrowserServiceCallbacks) 72 * DO NOT RENUMBER THESE! 73 */ 74 75 /** (service v1) 76 * Sent after {@link MediaBrowserCompat#connect()} when the request has successfully 77 * completed. 78 * - arg1 : The service version 79 * - data 80 * DATA_MEDIA_ITEM_ID : A string for the root media item id 81 * DATA_MEDIA_SESSION_TOKEN : Media session token 82 * DATA_ROOT_HINTS : An optional root hints bundle of service-specific arguments 83 */ 84 public static final int SERVICE_MSG_ON_CONNECT = 1; 85 86 /** (service v1) 87 * Sent after {@link MediaBrowserCompat#connect()} when the connection to the media browser 88 * failed. 89 * - arg1 : service version 90 */ 91 public static final int SERVICE_MSG_ON_CONNECT_FAILED = 2; 92 93 /** (service v1) 94 * Sent when the list of children is loaded or updated. 95 * - arg1 : The service version 96 * - data 97 * DATA_MEDIA_ITEM_ID : A string for the parent media item id 98 * DATA_MEDIA_ITEM_LIST : An array list for the media item children 99 * DATA_OPTIONS : A bundle of service-specific arguments sent from the media browse to 100 * the media browser service 101 * DATA_NOTIFY_CHILDREN_CHANGED_OPTIONS : A bundle of service-specific arguments sent from 102 * the media browser service to the media browser by calling 103 * {@link MediaBrowserServiceCompat#notifyChildrenChanged(String, Bundle)} 104 */ 105 public static final int SERVICE_MSG_ON_LOAD_CHILDREN = 3; 106 107 /** 108 * MediaBrowserServiceCompat will check the version of the MediaBrowserCompat, and it will not 109 * send messages if they are introduced in the higher version of the MediaBrowserCompat. 110 */ 111 public static final int CLIENT_VERSION_1 = 1; 112 public static final int CLIENT_VERSION_CURRENT = CLIENT_VERSION_1; 113 114 /* 115 * Messages sent from the media browser compat to the media browser service compat. 116 * (Compat implementation for IMediaBrowserService) 117 * DO NOT RENUMBER THESE! 118 */ 119 120 /** (client v1) 121 * Sent to connect to the media browse service compat. 122 * - arg1 : The client version 123 * - data 124 * DATA_PACKAGE_NAME : A string for the package name of MediaBrowserCompat 125 * DATA_ROOT_HINTS : An optional root hints bundle of service-specific arguments 126 * - replyTo : Callback messenger 127 */ 128 public static final int CLIENT_MSG_CONNECT = 1; 129 130 /** (client v1) 131 * Sent to disconnect from the media browse service compat. 132 * - arg1 : The client version 133 * - replyTo : Callback messenger 134 */ 135 public static final int CLIENT_MSG_DISCONNECT = 2; 136 137 /** (client v1) 138 * Sent to subscribe for changes to the children of the specified media id. 139 * - arg1 : The client version 140 * - data 141 * DATA_MEDIA_ITEM_ID : A string for a media item id 142 * DATA_OPTIONS : A bundle of service-specific arguments sent from the media browser to 143 * the media browser service 144 * DATA_CALLBACK_TOKEN : An IBinder of service-specific arguments sent from the media 145 * browser to the media browser service 146 * - replyTo : Callback messenger 147 */ 148 public static final int CLIENT_MSG_ADD_SUBSCRIPTION = 3; 149 150 /** (client v1) 151 * Sent to unsubscribe for changes to the children of the specified media id. 152 * - arg1 : The client version 153 * - data 154 * DATA_MEDIA_ITEM_ID : A string for a media item id 155 * DATA_CALLBACK_TOKEN : An IBinder of service-specific arguments sent from the media 156 * browser to the media browser service 157 * - replyTo : Callback messenger 158 */ 159 public static final int CLIENT_MSG_REMOVE_SUBSCRIPTION = 4; 160 161 /** (client v1) 162 * Sent to retrieve a specific media item from the connected service. 163 * - arg1 : The client version 164 * - data 165 * DATA_MEDIA_ITEM_ID : A string for a media item id 166 * DATA_RESULT_RECEIVER : Result receiver to get the result 167 * - replyTo : Callback messenger 168 */ 169 public static final int CLIENT_MSG_GET_MEDIA_ITEM = 5; 170 171 /** (client v1) 172 * Sent to register the client messenger 173 * - arg1 : The client version 174 * - data 175 * DATA_ROOT_HINTS : An optional root hints bundle of service-specific arguments 176 * - replyTo : Callback messenger 177 */ 178 public static final int CLIENT_MSG_REGISTER_CALLBACK_MESSENGER = 6; 179 180 /** (client v1) 181 * Sent to unregister the client messenger 182 * - arg1 : The client version 183 * - replyTo : Callback messenger 184 */ 185 public static final int CLIENT_MSG_UNREGISTER_CALLBACK_MESSENGER = 7; 186 187 /** (client v1) 188 * Sent to retrieve a specific media item from the connected service. 189 * - arg1 : The client version 190 * - data 191 * DATA_SEARCH_QUERY : A string for search query that contains keywords separated by space. 192 * DATA_SEARCH_EXTRAS : A bundle of service-specific arguments to send to the media browser 193 * service. 194 * DATA_RESULT_RECEIVER : Result receiver to get the result. 195 * - replyTo : Callback messenger 196 */ 197 public static final int CLIENT_MSG_SEARCH = 8; 198 199 /** (client v1) 200 * Sent to request a custom action from the media browser. 201 * - arg1 : The client version 202 * - data 203 * DATA_CUSTOM_ACTION : A string for the custom action. 204 * DATA_CUSTOM_ACTION_EXTRAS : A bundle of service-specific arguments to send to the media 205 * browser service. 206 * DATA_RESULT_RECEIVER : Result receiver to get the result. 207 * - replyTo : Callback messenger 208 */ 209 public static final int CLIENT_MSG_SEND_CUSTOM_ACTION = 9; 210 MediaBrowserProtocol()211 private MediaBrowserProtocol() { 212 } 213 } 214