content: /*
   * Copyright (C) 2014 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 android.media.tv;
  
  import android.annotation.IntDef;
  import android.annotation.NonNull;
  import android.annotation.Nullable;
  import android.annotation.SdkConstant;
  import android.annotation.SdkConstant.SdkConstantType;
  import android.annotation.StringDef;
  import android.annotation.SystemApi;
  import android.app.Activity;
  import android.content.ComponentName;
  import android.content.ContentResolver;
  import android.content.ContentUris;
  import android.content.Context;
  import android.content.Intent;
  import android.net.Uri;
  import android.os.Bundle;
  import android.os.IBinder;
  import android.provider.BaseColumns;
  import android.text.TextUtils;
  import android.util.ArraySet;
  
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  /**
   * The contract between the TV provider and applications. Contains definitions for the supported
   * URIs and columns.
   * <h3>Overview</h3>
   *
   * <p>TvContract defines a basic database of TV content metadata such as channel and program
   * information. The information is stored in {@link Channels} and {@link Programs} tables.
   *
   * <ul>
   *     <li>A row in the {@link Channels} table represents information about a TV channel. The data
   *         format can vary greatly from standard to standard or according to service provider, thus
   *         the columns here are mostly comprised of basic entities that are usually seen to users
   *         regardless of standard such as channel number and name.</li>
   *     <li>A row in the {@link Programs} table represents a set of data describing a TV program such
   *         as program title and start time.</li>
   * </ul>
   */
  public final class TvContract {
      /** The authority for the TV provider. */
      public static final String AUTHORITY = "android.media.tv";
  
      /**
       * Permission to read TV listings. This is required to read all the TV channel and program
       * information available on the system.
       * @hide
       */
      public static final String PERMISSION_READ_TV_LISTINGS = "android.permission.READ_TV_LISTINGS";
  
      private static final String PATH_CHANNEL = "channel";
      private static final String PATH_PROGRAM = "program";
      private static final String PATH_RECORDED_PROGRAM = "recorded_program";
      private static final String PATH_PREVIEW_PROGRAM = "preview_program";
      private static final String PATH_WATCH_NEXT_PROGRAM = "watch_next_program";
      private static final String PATH_PASSTHROUGH = "passthrough";
  
      /**
       * Broadcast Action: sent when an application requests the system to make the given channel
       * browsable.  The operation is performed in the background without user interaction. This
       * is only relevant to channels with {@link Channels#TYPE_PREVIEW} type.
       *
       * <p>The intent must contain the following bundle parameters:
       * <ul>
       *     <li>{@link #EXTRA_CHANNEL_ID}: ID for the {@link Channels#TYPE_PREVIEW} channel as a long
       *     integer.</li>
       *     <li>{@link #EXTRA_PACKAGE_NAME}: the package name of the requesting application.</li>
       * </ul>
       * @hide
       */
      @SystemApi
      @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
      public static final String ACTION_CHANNEL_BROWSABLE_REQUESTED =
              "android.media.tv.action.CHANNEL_BROWSABLE_REQUESTED";
  
      /**
       * Activity Action: sent by an application telling the system to make the given channel
       * browsable with user interaction. The system may show UI to ask user to approve the channel.
       * This is only relevant to channels with {@link Channels#TYPE_PREVIEW} type. Use
       * {@link Activity#startActivityForResult} to get the result of the request.
       *
       * <p>The intent must contain the following bundle parameters:
       * <ul>
       *     <li>{@link #EXTRA_CHANNEL_ID}: ID for the {@link Channels#TYPE_PREVIEW} channel as a long
       *     integer.</li>
       * </ul>
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_REQUEST_CHANNEL_BROWSABLE =
              "android.media.tv.action.REQUEST_CHANNEL_BROWSABLE";
  
      /**
       * Broadcast Action: sent by the system to tell the target TV input that one of its preview
       * program's browsable state is disabled, i.e., it will no longer be shown to users, which, for
       * example, might be a result of users' interaction with UI. The input is expected to delete the
       * preview program from the content provider.
       *
       * <p>The intent must contain the following bundle parameter:
       * <ul>
       *     <li>{@link #EXTRA_PREVIEW_PROGRAM_ID}: the disabled preview program ID.</li>
       * </ul>
       */
      @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
      public static final String ACTION_PREVIEW_PROGRAM_BROWSABLE_DISABLED =
              "android.media.tv.action.PREVIEW_PROGRAM_BROWSABLE_DISABLED";
  
      /**
       * Broadcast Action: sent by the system to tell the target TV input that one of its "watch next"
       * program's browsable state is disabled, i.e., it will no longer be shown to users, which, for
       * example, might be a result of users' interaction with UI. The input is expected to delete the
       * "watch next" program from the content provider.
       *
       * <p>The intent must contain the following bundle parameter:
       * <ul>
       *     <li>{@link #EXTRA_WATCH_NEXT_PROGRAM_ID}: the disabled "watch next" program ID.</li>
       * </ul>
       */
      @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
      public static final String ACTION_WATCH_NEXT_PROGRAM_BROWSABLE_DISABLED =
              "android.media.tv.action.WATCH_NEXT_PROGRAM_BROWSABLE_DISABLED";
  
      /**
       * Broadcast Action: sent by the system to tell the target TV input that one of its existing
       * preview programs is added to the watch next programs table by user.
       *
       * <p>The intent must contain the following bundle parameters:
       * <ul>
       *     <li>{@link #EXTRA_PREVIEW_PROGRAM_ID}: the ID of the existing preview program.</li>
       *     <li>{@link #EXTRA_WATCH_NEXT_PROGRAM_ID}: the ID of the new watch next program.</li>
       * </ul>
       */
      @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
      public static final String ACTION_PREVIEW_PROGRAM_ADDED_TO_WATCH_NEXT =
              "android.media.tv.action.PREVIEW_PROGRAM_ADDED_TO_WATCH_NEXT";
  
      /**
       * Broadcast Action: sent to the target TV input after it is first installed to notify the input
       * to initialize its channels and programs to the system content provider.
       *
       * <p>Note that this intent is sent only on devices with
       * {@link android.content.pm.PackageManager#FEATURE_LEANBACK} enabled. Besides that, in order
       * to receive this intent, the target TV input must:
       * <ul>
       *     <li>Declare a broadcast receiver for this intent in its
       *         <code>AndroidManifest.xml</code>.</li>
       *     <li>Declare appropriate permissions to write channel and program data in its
       *         <code>AndroidManifest.xml</code>.</li>
       * </ul>
       */
      @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
      public static final String ACTION_INITIALIZE_PROGRAMS =
              "android.media.tv.action.INITIALIZE_PROGRAMS";
  
      /**
       * The key for a bundle parameter containing a channel ID as a long integer
       */
      public static final String EXTRA_CHANNEL_ID = "android.media.tv.extra.CHANNEL_ID";
  
      /**
       * The key for a bundle parameter containing a package name as a string.
       * @hide
       */
      @SystemApi
      public static final String EXTRA_PACKAGE_NAME = "android.media.tv.extra.PACKAGE_NAME";
  
      /** The key for a bundle parameter containing a program ID as a long integer. */
      public static final String EXTRA_PREVIEW_PROGRAM_ID =
              "android.media.tv.extra.PREVIEW_PROGRAM_ID";
  
      /** The key for a bundle parameter containing a watch next program ID as a long integer. */
      public static final String EXTRA_WATCH_NEXT_PROGRAM_ID =
              "android.media.tv.extra.WATCH_NEXT_PROGRAM_ID";
  
      /**
       * The key for a bundle parameter containing the result code of a method call as an integer.
       *
       * @see #RESULT_OK
       * @see #RESULT_ERROR_IO
       * @see #RESULT_ERROR_INVALID_ARGUMENT
       * @hide
       */
      @SystemApi
      public static final String EXTRA_RESULT_CODE = "android.media.tv.extra.RESULT_CODE";
  
      /**
       * The result code for a successful execution without error.
       * @hide
       */
      @SystemApi
      public static final int RESULT_OK = 0;
  
      /**
       * The result code for a failure from I/O operation.
       * @hide
       */
      @SystemApi
      public static final int RESULT_ERROR_IO = 1;
  
      /**
       * The result code for a failure from invalid argument.
       * @hide
       */
      @SystemApi
      public static final int RESULT_ERROR_INVALID_ARGUMENT = 2;
  
      /**
       * The method name to get existing columns in the given table of the specified content provider.
       *
       * <p>The method caller must provide the following parameter:
       * <ul>
       *     <li>{@code arg}: The content URI of the target table as a {@link String}.</li>
       * </ul>
  
       * <p>On success, the returned {@link android.os.Bundle} will include existing column names
       * with the key {@link #EXTRA_EXISTING_COLUMN_NAMES}. Otherwise, the return value will be {@code null}.
       *
       * @see ContentResolver#call(Uri, String, String, Bundle)
       * @see #EXTRA_EXISTING_COLUMN_NAMES
       * @hide
       */
      @SystemApi
      public static final String METHOD_GET_COLUMNS = "get_columns";
  
      /**
       * The method name to add a new column in the given table of the specified content provider.
       *
       * <p>The method caller must provide the following parameter:
       * <ul>
       *     <li>{@code arg}: The content URI of the target table as a {@link String}.</li>
       *     <li>{@code extra}: Name, data type, and default value of the new column in a Bundle:
       *         <ul>
       *             <li>{@link #EXTRA_COLUMN_NAME} the column name as a {@link String}.</li>
       *             <li>{@link #EXTRA_DATA_TYPE} the data type as a {@link String}.</li>
       *             <li>{@link #EXTRA_DEFAULT_VALUE} the default value as a {@link String}.
       *                 (optional)</li>
       *         </ul>
       *     </li>
       * </ul>
       *
       * <p>On success, the returned {@link android.os.Bundle} will include current colum names after
       * the addition operation with the key {@link #EXTRA_EXISTING_COLUMN_NAMES}. Otherwise, the
       * return value will be {@code null}.
       *
       * @see ContentResolver#call(Uri, String, String, Bundle)
       * @see #EXTRA_COLUMN_NAME
       * @see #EXTRA_DATA_TYPE
       * @see #EXTRA_DEFAULT_VALUE
       * @see #EXTRA_EXISTING_COLUMN_NAMES
       * @hide
       */
      @SystemApi
      public static final String METHOD_ADD_COLUMN = "add_column";
  
      /**
       * The method name to get all the blocked packages. When a package is blocked, all the data for
       * preview programs/channels and watch next programs belonging to this package in the content
       * provider will be cleared. Once a package is blocked, {@link SecurityException} will be thrown
       * for all the requests to preview programs/channels and watch next programs via
       * {@link android.content.ContentProvider} from it.
       *
       * <p>The returned {@link android.os.Bundle} will include all the blocked package names with the
       * key {@link #EXTRA_BLOCKED_PACKAGES}.
       *
       * @see ContentResolver#call(Uri, String, String, Bundle)
       * @see #EXTRA_BLOCKED_PACKAGES
       * @see #METHOD_BLOCK_PACKAGE
       * @see #METHOD_UNBLOCK_PACKAGE
       * @hide
       */
      @SystemApi
      public static final String METHOD_GET_BLOCKED_PACKAGES = "get_blocked_packages";
  
      /**
       * The method name to block the access from the given package. When a package is blocked, all
       * the data for preview programs/channels and watch next programs belonging to this package in
       * the content provider will be cleared. Once a package is blocked, {@link SecurityException}
       * will be thrown for all the requests to preview programs/channels and watch next programs via
       * {@link android.content.ContentProvider} from it.
       *
       * <p>The method caller must provide the following parameter:
       * <ul>
       *     <li>{@code arg}: The package name to be added as blocked package {@link String}.</li>
       * </ul>
       *
       * <p>The returned {@link android.os.Bundle} will include an integer code denoting whether the
       * execution is successful or not with the key {@link #EXTRA_RESULT_CODE}. If {@code arg} is
       * empty, the result code will be {@link #RESULT_ERROR_INVALID_ARGUMENT}. If success, the result
       * code will be {@link #RESULT_OK}. Otherwise, the result code will be {@link #RESULT_ERROR_IO}.
       *
       * @see ContentResolver#call(Uri, String, String, Bundle)
       * @see #EXTRA_RESULT_CODE
       * @see #METHOD_GET_BLOCKED_PACKAGES
       * @see #METHOD_UNBLOCK_PACKAGE
       * @hide
       */
      @SystemApi
      public static final String METHOD_BLOCK_PACKAGE = "block_package";
  
      /**
       * The method name to unblock the access from the given package. When a package is blocked, all
       * the data for preview programs/channels and watch next programs belonging to this package in
       * the content provider will be cleared. Once a package is blocked, {@link SecurityException}
       * will be thrown for all the requests to preview programs/channels and watch next programs via
       * {@link android.content.ContentProvider} from it.
       *
       * <p>The method caller must provide the following parameter:
       * <ul>
       *     <li>{@code arg}: The package name to be removed from blocked list as a {@link String}.
       *     </li>
       * </ul>
       *
       * <p>The returned {@link android.os.Bundle} will include an integer code denoting whether the
       * execution is successful or not with the key {@link #EXTRA_RESULT_CODE}. If {@code arg} is
       * empty, the result code will be {@link #RESULT_ERROR_INVALID_ARGUMENT}. If success, the result
       * code will be {@link #RESULT_OK}. Otherwise, the result code will be {@link #RESULT_ERROR_IO}.
       *
       * @see ContentResolver#call(Uri, String, String, Bundle)
       * @see #EXTRA_RESULT_CODE
       * @see #METHOD_GET_BLOCKED_PACKAGES
       * @see #METHOD_BLOCK_PACKAGE
       * @hide
       */
      @SystemApi
      public static final String METHOD_UNBLOCK_PACKAGE = "unblock_package";
  
      /**
       * The key for a returned {@link Bundle} value containing existing column names in the given
       * table as an {@link ArrayList} of {@link String}.
       *
       * @see #METHOD_GET_COLUMNS
       * @see #METHOD_ADD_COLUMN
       * @hide
       */
      @SystemApi
      public static final String EXTRA_EXISTING_COLUMN_NAMES =
              "android.media.tv.extra.EXISTING_COLUMN_NAMES";
  
      /**
       * The key for a {@link Bundle} parameter containing the new column name to be added in the
       * given table as a non-empty {@link CharSequence}.
       *
       * @see #METHOD_ADD_COLUMN
       * @hide
       */
      @SystemApi
      public static final String EXTRA_COLUMN_NAME = "android.media.tv.extra.COLUMN_NAME";
  
      /**
       * The key for a {@link Bundle} parameter containing the data type of the new column to be added
       * in the given table as a non-empty {@link CharSequence}, which should be one of the following
       * values: {@code "TEXT"}, {@code "INTEGER"}, {@code "REAL"}, or {@code "BLOB"}.
       *
       * @see #METHOD_ADD_COLUMN
       * @hide
       */
      @SystemApi
      public static final String EXTRA_DATA_TYPE = "android.media.tv.extra.DATA_TYPE";
  
      /**
       * The key for a {@link Bundle} parameter containing the default value of the new column to be
       * added in the given table as a {@link CharSequence}, which represents a valid default value
       * according to the data type provided with {@link #EXTRA_DATA_TYPE}.
       *
       * @see #METHOD_ADD_COLUMN
       * @hide
       */
      @SystemApi
      public static final String EXTRA_DEFAULT_VALUE = "android.media.tv.extra.DEFAULT_VALUE";
  
      /**
       * The key for a returned {@link Bundle} value containing all the blocked package names as an
       * {@link ArrayList} of {@link String}.
       *
       * @see #METHOD_GET_BLOCKED_PACKAGES
       * @hide
       */
      @SystemApi
      public static final String EXTRA_BLOCKED_PACKAGES = "android.media.tv.extra.BLOCKED_PACKAGES";
  
      /**
       * An optional query, update or delete URI parameter that allows the caller to specify TV input
       * ID to filter channels.
       * @hide
       */
      public static final String PARAM_INPUT = "input";
  
      /**
       * An optional query, update or delete URI parameter that allows the caller to specify channel
       * ID to filter programs.
       * @hide
       */
      public static final String PARAM_CHANNEL = "channel";
  
      /**
       * An optional query, update or delete URI parameter that allows the caller to specify start
       * time (in milliseconds since the epoch) to filter programs.
       * @hide
       */
      public static final String PARAM_START_TIME = "start_time";
  
      /**
       * An optional query, update or delete URI parameter that allows the caller to specify end time
       * (in milliseconds since the epoch) to filter programs.
       * @hide
       */
      public static final String PARAM_END_TIME = "end_time";
  
      /**
       * A query, update or delete URI parameter that allows the caller to operate on all or
       * browsable-only channels. If set to "true", the rows that contain non-browsable channels are
       * not affected.
       * @hide
       */
      public static final String PARAM_BROWSABLE_ONLY = "browsable_only";
  
      /**
       * An optional query, update or delete URI parameter that allows the caller to specify canonical
       * genre to filter programs.
       * @hide
       */
      public static final String PARAM_CANONICAL_GENRE = "canonical_genre";
  
      /**
       * A query, update or delete URI parameter that allows the caller to operate only on preview or
       * non-preview channels. If set to "true", the operation affects the rows for preview channels
       * only. If set to "false", the operation affects the rows for non-preview channels only.
       * @hide
       */
      public static final String PARAM_PREVIEW = "preview";
  
      /**
       * An optional query, update or delete URI parameter that allows the caller to specify package
       * name to filter channels.
       * @hide
       */
      public static final String PARAM_PACKAGE = "package";
  
      /**
       * Builds an ID that uniquely identifies a TV input service.
       *
       * @param name The {@link ComponentName} of the TV input service to build ID for.
       * @return the ID for the given TV input service.
       */
      public static String buildInputId(ComponentName name) {
          return name.flattenToShortString();
      }
  
      /**
       * Builds a URI that points to a specific channel.
       *
       * @param channelId The ID of the channel to point to.
       */
      public static Uri buildChannelUri(long channelId) {
          return ContentUris.withAppendedId(Channels.CONTENT_URI, channelId);
      }
  
      /**
       * Build a special channel URI intended to be used with pass-through inputs. (e.g. HDMI)
       *
       * @param inputId The ID of the pass-through input to build a channels URI for.
       * @see TvInputInfo#isPassthroughInput()
       */
      public static Uri buildChannelUriForPassthroughInput(String inputId) {
          return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT).authority(AUTHORITY)
                  .appendPath(PATH_PASSTHROUGH).appendPath(inputId).build();
      }
  
      /**
       * Builds a URI that points to a channel logo. See {@link Channels.Logo}.
       *
       * @param channelId The ID of the channel whose logo is pointed to.
       */
      public static Uri buildChannelLogoUri(long channelId) {
          return buildChannelLogoUri(buildChannelUri(channelId));
      }
  
      /**
       * Builds a URI that points to a channel logo. See {@link Channels.Logo}.
       *
       * @param channelUri The URI of the channel whose logo is pointed to.
       */
      public static Uri buildChannelLogoUri(Uri channelUri) {
          if (!isChannelUriForTunerInput(channelUri)) {
              throw new IllegalArgumentException("Not a channel: " + channelUri);
          }
          return Uri.withAppendedPath(channelUri, Channels.Logo.CONTENT_DIRECTORY);
      }
  
      /**
       * Builds a URI that points to all channels from a given TV input.
       *
       * @param inputId The ID of the TV input to build a channels URI for. If {@code null}, builds a
       *            URI for all the TV inputs.
       */
      public static Uri buildChannelsUriForInput(@Nullable String inputId) {
          return buildChannelsUriForInput(inputId, false);
      }
  
      /**
       * Builds a URI that points to all or browsable-only channels from a given TV input.
       *
       * @param inputId The ID of the TV input to build a channels URI for. If {@code null}, builds a
       *            URI for all the TV inputs.
       * @param browsableOnly If set to {@code true} the URI points to only browsable channels. If set
       *            to {@code false} the URI points to all channels regardless of whether they are
       *            browsable or not.
       * @hide
       */
      @SystemApi
      public static Uri buildChannelsUriForInput(@Nullable String inputId,
              boolean browsableOnly) {
          Uri.Builder builder = Channels.CONTENT_URI.buildUpon();
          if (inputId != null) {
              builder.appendQueryParameter(PARAM_INPUT, inputId);
          }
          return builder.appendQueryParameter(PARAM_BROWSABLE_ONLY, String.valueOf(browsableOnly))
                  .build();
      }
  
      /**
       * Builds a URI that points to all or browsable-only channels which have programs with the given
       * genre from the given TV input.
       *
       * @param inputId The ID of the TV input to build a channels URI for. If {@code null}, builds a
       *            URI for all the TV inputs.
       * @param genre {@link Programs.Genres} to search. If {@code null}, builds a URI for all genres.
       * @param browsableOnly If set to {@code true} the URI points to only browsable channels. If set
       *            to {@code false} the URI points to all channels regardless of whether they are
       *            browsable or not.
       * @hide
       */
      @SystemApi
      public static Uri buildChannelsUriForInput(@Nullable String inputId,
              @Nullable String genre, boolean browsableOnly) {
          if (genre == null) {
              return buildChannelsUriForInput(inputId, browsableOnly);
          }
          if (!Programs.Genres.isCanonical(genre)) {
              throw new IllegalArgumentException("Not a canonical genre: '" + genre + "'");
          }
          return buildChannelsUriForInput(inputId, browsableOnly).buildUpon()
                  .appendQueryParameter(PARAM_CANONICAL_GENRE, genre).build();
      }
  
      /**
       * Builds a URI that points to a specific program.
       *
       * @param programId The ID of the program to point to.
       */
      public static Uri buildProgramUri(long programId) {
          return ContentUris.withAppendedId(Programs.CONTENT_URI, programId);
      }
  
      /**
       * Builds a URI that points to all programs on a given channel.
       *
       * @param channelId The ID of the channel to return programs for.
       */
      public static Uri buildProgramsUriForChannel(long channelId) {
          return Programs.CONTENT_URI.buildUpon()
                  .appendQueryParameter(PARAM_CHANNEL, String.valueOf(channelId)).build();
      }
  
      /**
       * Builds a URI that points to all programs on a given channel.
       *
       * @param channelUri The URI of the channel to return programs for.
       */
      public static Uri buildProgramsUriForChannel(Uri channelUri) {
          if (!isChannelUriForTunerInput(channelUri)) {
              throw new IllegalArgumentException("Not a channel: " + channelUri);
          }
          return buildProgramsUriForChannel(ContentUris.parseId(channelUri));
      }
  
      /**
       * Builds a URI that points to programs on a specific channel whose schedules overlap with the
       * given time frame.
       *
       * @param channelId The ID of the channel to return programs for.
       * @param startTime The start time used to filter programs. The returned programs will have a
       *            {@link Programs#COLUMN_END_TIME_UTC_MILLIS} that is greater than or equal to
                    {@code startTime}.
       * @param endTime The end time used to filter programs. The returned programs will have
       *            {@link Programs#COLUMN_START_TIME_UTC_MILLIS} that is less than or equal to
       *            {@code endTime}.
       */
      public static Uri buildProgramsUriForChannel(long channelId, long startTime,
              long endTime) {
          Uri uri = buildProgramsUriForChannel(channelId);
          return uri.buildUpon().appendQueryParameter(PARAM_START_TIME, String.valueOf(startTime))
                  .appendQueryParameter(PARAM_END_TIME, String.valueOf(endTime)).build();
      }
  
      /**
       * Builds a URI that points to programs on a specific channel whose schedules overlap with the
       * given time frame.
       *
       * @param channelUri The URI of the channel to return programs for.
       * @param startTime The start time used to filter programs. The returned programs should have
       *            {@link Programs#COLUMN_END_TIME_UTC_MILLIS} that is greater than this time.
       * @param endTime The end time used to filter programs. The returned programs should have
       *            {@link Programs#COLUMN_START_TIME_UTC_MILLIS} that is less than this time.
       */
      public static Uri buildProgramsUriForChannel(Uri channelUri, long startTime,
              long endTime) {
          if (!isChannelUriForTunerInput(channelUri)) {
              throw new IllegalArgumentException("Not a channel: " + channelUri);
          }
          return buildProgramsUriForChannel(ContentUris.parseId(channelUri), startTime, endTime);
      }
  
      /**
       * Builds a URI that points to a specific recorded program.
       *
       * @param recordedProgramId The ID of the recorded program to point to.
       */
      public static Uri buildRecordedProgramUri(long recordedProgramId) {
          return ContentUris.withAppendedId(RecordedPrograms.CONTENT_URI, recordedProgramId);
      }
  
      /**
       * Builds a URI that points to a specific preview program.
       *
       * @param previewProgramId The ID of the preview program to point to.
       */
      public static Uri buildPreviewProgramUri(long previewProgramId) {
          return ContentUris.withAppendedId(PreviewPrograms.CONTENT_URI, previewProgramId);
      }
  
      /**
       * Builds a URI that points to all preview programs on a given channel.
       *
       * @param channelId The ID of the channel to return preview programs for.
       */
      public static Uri buildPreviewProgramsUriForChannel(long channelId) {
          return PreviewPrograms.CONTENT_URI.buildUpon()
                  .appendQueryParameter(PARAM_CHANNEL, String.valueOf(channelId)).build();
      }
  
      /**
       * Builds a URI that points to all preview programs on a given channel.
       *
       * @param channelUri The URI of the channel to return preview programs for.
       */
      public static Uri buildPreviewProgramsUriForChannel(Uri channelUri) {
          if (!isChannelUriForTunerInput(channelUri)) {
              throw new IllegalArgumentException("Not a channel: " + channelUri);
          }
          return buildPreviewProgramsUriForChannel(ContentUris.parseId(channelUri));
      }
  
      /**
       * Builds a URI that points to a specific watch next program.
       *
       * @param watchNextProgramId The ID of the watch next program to point to.
       */
      public static Uri buildWatchNextProgramUri(long watchNextProgramId) {
          return ContentUris.withAppendedId(WatchNextPrograms.CONTENT_URI, watchNextProgramId);
      }
  
      /**
       * Builds a URI that points to a specific program the user watched.
       *
       * @param watchedProgramId The ID of the watched program to point to.
       * @hide
       */
      public static Uri buildWatchedProgramUri(long watchedProgramId) {
          return ContentUris.withAppendedId(WatchedPrograms.CONTENT_URI, watchedProgramId);
      }
  
      private static boolean isTvUri(Uri uri) {
          return uri != null && ContentResolver.SCHEME_CONTENT.equals(uri.getScheme())
                  && AUTHORITY.equals(uri.getAuthority());
      }
  
      private static boolean isTwoSegmentUriStartingWith(Uri uri, String pathSegment) {
          List<String> pathSegments = uri.getPathSegments();
          return pathSegments.size() == 2 && pathSegment.equals(pathSegments.get(0));
      }
  
      /**
       * @return {@code true} if {@code uri} is a channel URI.
       */
      public static boolean isChannelUri(@NonNull Uri uri) {
          return isChannelUriForTunerInput(uri) || isChannelUriForPassthroughInput(uri);
      }
  
      /**
       * @return {@code true} if {@code uri} is a channel URI for a tuner input.
       */
      public static boolean isChannelUriForTunerInput(@NonNull Uri uri) {
          return isTvUri(uri) && isTwoSegmentUriStartingWith(uri, PATH_CHANNEL);
      }
  
      /**
       * @return {@code true} if {@code uri} is a channel URI for a pass-through input.
       */
      public static boolean isChannelUriForPassthroughInput(@NonNull Uri uri) {
          return isTvUri(uri) && isTwoSegmentUriStartingWith(uri, PATH_PASSTHROUGH);
      }
  
      /**
       * @return {@code true} if {@code uri} is a program URI.
       */
      public static boolean isProgramUri(@NonNull Uri uri) {
          return isTvUri(uri) && isTwoSegmentUriStartingWith(uri, PATH_PROGRAM);
      }
  
      /**
       * @return {@code true} if {@code uri} is a recorded program URI.
       */
      public static boolean isRecordedProgramUri(@NonNull Uri uri) {
          return isTvUri(uri) && isTwoSegmentUriStartingWith(uri, PATH_RECORDED_PROGRAM);
      }
  
      /**
       * Requests to make a channel browsable.
       *
       * <p>Once called, the system will review the request and make the channel browsable based on
       * its policy. The first request from a package is guaranteed to be approved. This is only
       * relevant to channels with {@link Channels#TYPE_PREVIEW} type.
       *
       * @param context The context for accessing content provider.
       * @param channelId The channel ID to be browsable.
       * @see Channels#COLUMN_BROWSABLE
       */
      public static void requestChannelBrowsable(Context context, long channelId) {
          TvInputManager manager = (TvInputManager) context.getSystemService(
              Context.TV_INPUT_SERVICE);
          if (manager != null) {
              manager.requestChannelBrowsable(buildChannelUri(channelId));
          }
      }
  
      private TvContract() {}
  
      /**
       * Common base for the tables of TV channels/programs.
       */
      public interface BaseTvColumns extends BaseColumns {
          /**
           * The name of the package that owns the current row.
           *
           * <p>The TV provider fills in this column with the name of the package that provides the
           * initial data of the row. If the package is later uninstalled, the rows it owns are
           * automatically removed from the tables.
           *
           * <p>Type: TEXT
           */
          String COLUMN_PACKAGE_NAME = "package_name";
      }
  
      /**
       * Common columns for the tables of TV programs.
       * @hide
       */
      interface ProgramColumns {
          /** @hide */
          @IntDef({
                  REVIEW_RATING_STYLE_STARS,
                  REVIEW_RATING_STYLE_THUMBS_UP_DOWN,
                  REVIEW_RATING_STYLE_PERCENTAGE,
          })
          @Retention(RetentionPolicy.SOURCE)
          @interface ReviewRatingStyle {}
  
          /**
           * The review rating style for five star rating.
           *
           * @see #COLUMN_REVIEW_RATING_STYLE
           */
          int REVIEW_RATING_STYLE_STARS = 0;
  
          /**
           * The review rating style for thumbs-up and thumbs-down rating.
           *
           * @see #COLUMN_REVIEW_RATING_STYLE
           */
          int REVIEW_RATING_STYLE_THUMBS_UP_DOWN = 1;
  
          /**
           * The review rating style for 0 to 100 point system.
           *
           * @see #COLUMN_REVIEW_RATING_STYLE
           */
          int REVIEW_RATING_STYLE_PERCENTAGE = 2;
  
          /**
           * The title of this TV program.
           *
           * <p>If this program is an episodic TV show, it is recommended that the title is the series
           * title and its related fields ({@link #COLUMN_SEASON_TITLE} and/or
           * {@link #COLUMN_SEASON_DISPLAY_NUMBER}, {@link #COLUMN_SEASON_DISPLAY_NUMBER},
           * {@link #COLUMN_EPISODE_DISPLAY_NUMBER}, and {@link #COLUMN_EPISODE_TITLE}) are filled in.
           *
           * <p>Type: TEXT
           */
          String COLUMN_TITLE = "title";
  
          /**
           * The season display number of this TV program for episodic TV shows.
           *
           * <p>This is used to indicate the season number. (e.g. 1, 2 or 3) Note that the value
           * does not necessarily be numeric. (e.g. 12B)
           *
           * <p>Can be empty.
           *
           * <p>Type: TEXT
           */
          String COLUMN_SEASON_DISPLAY_NUMBER = "season_display_number";
  
          /**
           * The title of the season for this TV program for episodic TV shows.
           *
           * <p>This is an optional field supplied only when the season has a special title
           * (e.g. The Final Season). If provided, the applications should display it instead of
           * {@link #COLUMN_SEASON_DISPLAY_NUMBER}, and should display it without alterations.
           * (e.g. for "The Final Season", displayed string should be "The Final Season", not
           * "Season The Final Season"). When displaying multiple programs, the order should be based
           * on {@link #COLUMN_SEASON_DISPLAY_NUMBER}, even when {@link #COLUMN_SEASON_TITLE} exists.
           *
           * <p>Can be empty.
           *
           * <p>Type: TEXT
           */
          String COLUMN_SEASON_TITLE = "season_title";
  
          /**
           * The episode display number of this TV program for episodic TV shows.
           *
           * <p>This is used to indicate the episode number. (e.g. 1, 2 or 3) Note that the value
           * does not necessarily be numeric. (e.g. 12B)
           *
           * <p>Can be empty.
           *
           * <p>Type: TEXT
           */
          String COLUMN_EPISODE_DISPLAY_NUMBER = "episode_display_number";
  
          /**
           * The episode title of this TV program for episodic TV shows.
           *
           * <p>Can be empty.
           *
           * <p>Type: TEXT
           */
          String COLUMN_EPISODE_TITLE = "episode_title";
  
          /**
           * The comma-separated canonical genre string of this TV program.
           *
           * <p>Canonical genres are defined in {@link Genres}. Use {@link Genres#encode} to create a
           * text that can be stored in this column. Use {@link Genres#decode} to get the canonical
           * genre strings from the text stored in the column.
           *
           * <p>Type: TEXT
           * @see Genres
           * @see Genres#encode
           * @see Genres#decode
           */
          String COLUMN_CANONICAL_GENRE = "canonical_genre";
  
          /**
           * The short description of this TV program that is displayed to the user by default.
           *
           * <p>It is recommended to limit the length of the descriptions to 256 characters.
           *
           * <p>Type: TEXT
           */
          String COLUMN_SHORT_DESCRIPTION = "short_description";
  
          /**
           * The detailed, lengthy description of this TV program that is displayed only when the user
           * wants to see more information.
           *
           * <p>TV input services should leave this field empty if they have no additional details
           * beyond {@link #COLUMN_SHORT_DESCRIPTION}.
           *
           * <p>Type: TEXT
           */
          String COLUMN_LONG_DESCRIPTION = "long_description";
  
          /**
           * The width of the video for this TV program, in the unit of pixels.
           *
           * <p>Together with {@link #COLUMN_VIDEO_HEIGHT} this is used to determine the video
           * resolution of the current TV program. Can be empty if it is not known initially or the
           * program does not convey any video such as the programs from type
           * {@link Channels#SERVICE_TYPE_AUDIO} channels.
           *
           * <p>Type: INTEGER
           */
          String COLUMN_VIDEO_WIDTH = "video_width";
  
          /**
           * The height of the video for this TV program, in the unit of pixels.
           *
           * <p>Together with {@link #COLUMN_VIDEO_WIDTH} this is used to determine the video
           * resolution of the current TV program. Can be empty if it is not known initially or the
           * program does not convey any video such as the programs from type
           * {@link Channels#SERVICE_TYPE_AUDIO} channels.
           *
           * <p>Type: INTEGER
           */
          String COLUMN_VIDEO_HEIGHT = "video_height";
  
          /**
           * The comma-separated audio languages of this TV program.
           *
           * <p>This is used to describe available audio languages included in the program. Use either
           * ISO 639-1 or 639-2/T codes.
           *
           * <p>Type: TEXT
           */
          String COLUMN_AUDIO_LANGUAGE = "audio_language";
  
          /**
           * The comma-separated content ratings of this TV program.
           *
           * <p>This is used to describe the content rating(s) of this program. Each comma-separated
           * content rating sub-string should be generated by calling
           * {@link TvContentRating#flattenToString}. Note that in most cases the program content is
           * rated by a single rating system, thus resulting in a corresponding single sub-string that
           * does not require comma separation and multiple sub-strings appear only when the program
           * content is rated by two or more content rating systems. If any of those ratings is
           * specified as "blocked rating" in the user's parental control settings, the TV input
           * service should block the current content and wait for the signal that it is okay to
           * unblock.
           *
           * <p>Type: TEXT
           */
          String COLUMN_CONTENT_RATING = "content_rating";
  
          /**
           * The URI for the poster art of this TV program.
           *
           * <p>The data in the column must be a URL, or a URI in one of the following formats:
           *
           * <ul>
           * <li>content ({@link android.content.ContentResolver#SCHEME_CONTENT})</li>
           * <li>android.resource ({@link android.content.ContentResolver#SCHEME_ANDROID_RESOURCE})
           * </li>
           * <li>file ({@link android.content.ContentResolver#SCHEME_FILE})</li>
           * </ul>
           *
           * <p>Can be empty.
           *
           * <p>Type: TEXT
           */
          String COLUMN_POSTER_ART_URI = "poster_art_uri";
  
          /**
           * The URI for the thumbnail of this TV program.
           *
           * <p>The system can generate a thumbnail from the poster art if this column is not
           * specified. Thus it is not necessary for TV input services to include a thumbnail if it is
           * just a scaled image of the poster art.
           *
           * <p>The data in the column must be a URL, or a URI in one of the following formats:
           *
           * <ul>
           * <li>content ({@link android.content.ContentResolver#SCHEME_CONTENT})</li>
           * <li>android.resource ({@link android.content.ContentResolver#SCHEME_ANDROID_RESOURCE})
           * </li>
           * <li>file ({@link android.content.ContentResolver#SCHEME_FILE})</li>
           * </ul>
           *
           * <p>Can be empty.
           *
           * <p>Type: TEXT
           */
          String COLUMN_THUMBNAIL_URI = "thumbnail_uri";
  
          /**
           * The flag indicating whether this TV program is searchable or not.
           *
           * <p>The columns of searchable programs can be read by other applications that have proper
           * permission. Care must be taken not to open sensitive data.
           *
           * <p>A value of 1 indicates that the program is searchable and its columns can be read by
           * other applications, a value of 0 indicates that the program is hidden and its columns can
           * be read only by the package that owns the program and the system. If not specified, this
           * value is set to 1 (searchable) by default.
           *
           * <p>Type: INTEGER (boolean)
           */
          String COLUMN_SEARCHABLE = "searchable";
  
          /**
           * Internal data used by individual TV input services.
           *
           * <p>This is internal to the provider that inserted it, and should not be decoded by other
           * apps.
           *
           * <p>Type: BLOB
           */
          String COLUMN_INTERNAL_PROVIDER_DATA = "internal_provider_data";
  
          /**
           * Internal integer flag used by individual TV input services.
           *
           * <p>This is internal to the provider that inserted it, and should not be decoded by other
           * apps.
           *
           * <p>Type: INTEGER
           */
          String COLUMN_INTERNAL_PROVIDER_FLAG1 = "internal_provider_flag1";
  
          /**
           * Internal integer flag used by individual TV input services.
           *
           * <p>This is internal to the provider that inserted it, and should not be decoded by other
           * apps.
           *
           * <p>Type: INTEGER
           */
          String COLUMN_INTERNAL_PROVIDER_FLAG2 = "internal_provider_flag2";
  
          /**
           * Internal integer flag used by individual TV input services.
           *
           * <p>This is internal to the provider that inserted it, and should not be decoded by other
           * apps.
           *
           * <p>Type: INTEGER
           */
          String COLUMN_INTERNAL_PROVIDER_FLAG3 = "internal_provider_flag3";
  
          /**
           * Internal integer flag used by individual TV input services.
           *
           * <p>This is internal to the provider that inserted it, and should not be decoded by other
           * apps.
           *
           * <p>Type: INTEGER
           */
          String COLUMN_INTERNAL_PROVIDER_FLAG4 = "internal_provider_flag4";
  
          /**
           * The version number of this row entry used by TV input services.
           *
           * <p>This is best used by sync adapters to identify the rows to update. The number can be
           * defined by individual TV input services. One may assign the same value as
           * {@code version_number} in ETSI EN 300 468 or ATSC A/65, if the data are coming from a TV
           * broadcast.
           *
           * <p>Type: INTEGER
           */
          String COLUMN_VERSION_NUMBER = "version_number";
  
          /**
           * The review rating score style used for {@link #COLUMN_REVIEW_RATING}.
           *
           * <p> The value should match one of the followings: {@link #REVIEW_RATING_STYLE_STARS},
           * {@link #REVIEW_RATING_STYLE_THUMBS_UP_DOWN}, and {@link #REVIEW_RATING_STYLE_PERCENTAGE}.
           *
           * <p>Type: INTEGER
           * @see #COLUMN_REVIEW_RATING
           */
          String COLUMN_REVIEW_RATING_STYLE = "review_rating_style";
  
          /**
           * The review rating score for this program.
           *
           * <p>The format of the value is dependent on {@link #COLUMN_REVIEW_RATING_STYLE}. If the
           * style is {@link #REVIEW_RATING_STYLE_STARS}, the value should be a real number between
           * 0.0 and 5.0. (e.g. "4.5") If the style is {@link #REVIEW_RATING_STYLE_THUMBS_UP_DOWN},
           * the value should be two integers, one for thumbs-up count and the other for thumbs-down
           * count, with a comma between them. (e.g. "200,40") If the style is
           * {@link #REVIEW_RATING_STYLE_PERCENTAGE}, the value shoule be a real number between 0 and
           * 100. (e.g. "99.9")
           *
           * <p>Type: TEXT
           * @see #COLUMN_REVIEW_RATING_STYLE
           */
          String COLUMN_REVIEW_RATING = "review_rating";
  
          /**
           * The series ID of this TV program for episodic TV shows.
           *
           * <p>This is used to indicate the series ID. Programs in the same series share a series ID.
           *
           * <p>Can be empty.
           *
           * <p>Type: TEXT
           */
          String COLUMN_SERIES_ID = "series_id";
      }
  
      /**
       * Common columns for the tables of preview programs.
       * @hide
       */
      interface PreviewProgramColumns {
  
          /** @hide */
          @IntDef({
                  TYPE_MOVIE,
                  TYPE_TV_SERIES,
                  TYPE_TV_SEASON,
                  TYPE_TV_EPISODE,
                  TYPE_CLIP,
                  TYPE_EVENT,
                  TYPE_CHANNEL,
                  TYPE_TRACK,
                  TYPE_ALBUM,
                  TYPE_ARTIST,
                  TYPE_PLAYLIST,
                  TYPE_STATION,
          })
          @Retention(RetentionPolicy.SOURCE)
          public @interface Type {}
  
          /**
           * The program type for movie.
           *
           * @see #COLUMN_TYPE
           */
          int TYPE_MOVIE = 0;
  
          /**
           * The program type for TV series.
           *
           * @see #COLUMN_TYPE
           */
          int TYPE_TV_SERIES = 1;
  
          /**
           * The program type for TV season.
           *
           * @see #COLUMN_TYPE
           */
          int TYPE_TV_SEASON = 2;
  
          /**
           * The program type for TV episode.
           *
           * @see #COLUMN_TYPE
           */
          int TYPE_TV_EPISODE = 3;
  
          /**
           * The program type for clip.
           *
           * @see #COLUMN_TYPE
           */
          int TYPE_CLIP = 4;
  
          /**
           * The program type for event.
           *
           * @see #COLUMN_TYPE
           */
          int TYPE_EVENT = 5;
  
          /**
           * The program type for channel.
           *
           * @see #COLUMN_TYPE
           */
          int TYPE_CHANNEL = 6;
  
          /**
           * The program type for track.
           *
           * @see #COLUMN_TYPE
           */
          int TYPE_TRACK = 7;
  
          /**
           * The program type for album.
           *
           * @see #COLUMN_TYPE
           */
          int TYPE_ALBUM = 8;
  
          /**
           * The program type for artist.
           *
           * @see #COLUMN_TYPE
           */
          int TYPE_ARTIST = 9;
  
          /**
           * The program type for playlist.
           *
           * @see #COLUMN_TYPE
           */
          int TYPE_PLAYLIST = 10;
  
          /**
           * The program type for station.
           *
           * @see #COLUMN_TYPE
           */
          int TYPE_STATION = 11;
  
          /** @hide */
          @IntDef({
                  ASPECT_RATIO_16_9,
                  ASPECT_RATIO_3_2,
                  ASPECT_RATIO_1_1,
                  ASPECT_RATIO_2_3,
                  ASPECT_RATIO_4_3,
          })
          @Retention(RetentionPolicy.SOURCE)
          public @interface AspectRatio {}
  
          /**
           * The aspect ratio for 16:9.
           *
           * @see #COLUMN_POSTER_ART_ASPECT_RATIO
           * @see #COLUMN_THUMBNAIL_ASPECT_RATIO
           */
          int ASPECT_RATIO_16_9 = 0;
  
          /**
           * The aspect ratio for 3:2.
           *
           * @see #COLUMN_POSTER_ART_ASPECT_RATIO
           * @see #COLUMN_THUMBNAIL_ASPECT_RATIO
           */
          int ASPECT_RATIO_3_2 = 1;
  
          /**
           * The aspect ratio for 4:3.
           *
           * @see #COLUMN_POSTER_ART_ASPECT_RATIO
           * @see #COLUMN_THUMBNAIL_ASPECT_RATIO
           */
          int ASPECT_RATIO_4_3 = 2;
  
          /**
           * The aspect ratio for 1:1.
           *
           * @see #COLUMN_POSTER_ART_ASPECT_RATIO
           * @see #COLUMN_THUMBNAIL_ASPECT_RATIO
           */
          int ASPECT_RATIO_1_1 = 3;
  
          /**
           * The aspect ratio for 2:3.
           *
           * @see #COLUMN_POSTER_ART_ASPECT_RATIO
           * @see #COLUMN_THUMBNAIL_ASPECT_RATIO
           */
          int ASPECT_RATIO_2_3 = 4;
  
          /** @hide */
          @IntDef({
                  AVAILABILITY_AVAILABLE,
                  AVAILABILITY_FREE_WITH_SUBSCRIPTION,
                  AVAILABILITY_PAID_CONTENT,
          })
          @Retention(RetentionPolicy.SOURCE)
          public @interface Availability {}
  
          /**
           * The availability for "available to this user".
           *
           * @see #COLUMN_AVAILABILITY
           */
          int AVAILABILITY_AVAILABLE = 0;
  
          /**
           * The availability for "free with subscription".
           *
           * @see #COLUMN_AVAILABILITY
           */
          int AVAILABILITY_FREE_WITH_SUBSCRIPTION = 1;
  
          /**
           * The availability for "paid content, either to-own or rental
           * (user has not purchased/rented).
           *
           * @see #COLUMN_AVAILABILITY
           */
          int AVAILABILITY_PAID_CONTENT = 2;
  
          /** @hide */
          @IntDef({
                  INTERACTION_TYPE_VIEWS,
                  INTERACTION_TYPE_LISTENS,
                  INTERACTION_TYPE_FOLLOWERS,
                  INTERACTION_TYPE_FANS,
                  INTERACTION_TYPE_LIKES,
                  INTERACTION_TYPE_THUMBS,
                  INTERACTION_TYPE_VIEWERS,
          })
          @Retention(RetentionPolicy.SOURCE)
          public @interface InteractionType {}
  
          /**
           * The interaction type for "views".
           *
           * @see #COLUMN_INTERACTION_TYPE
           */
          int INTERACTION_TYPE_VIEWS = 0;
  
          /**
           * The interaction type for "listens".
           *
           * @see #COLUMN_INTERACTION_TYPE
           */
          int INTERACTION_TYPE_LISTENS = 1;
  
          /**
           * The interaction type for "followers".
           *
           * @see #COLUMN_INTERACTION_TYPE
           */
          int INTERACTION_TYPE_FOLLOWERS = 2;
  
          /**
           * The interaction type for "fans".
           *
           * @see #COLUMN_INTERACTION_TYPE
           */
          int INTERACTION_TYPE_FANS = 3;
  
          /**
           * The interaction type for "likes".
           *
           * @see #COLUMN_INTERACTION_TYPE
           */
          int INTERACTION_TYPE_LIKES = 4;
  
          /**
           * The interaction type for "thumbs".
           *
           * @see #COLUMN_INTERACTION_TYPE
           */
          int INTERACTION_TYPE_THUMBS = 5;
  
          /**
           * The interaction type for "viewers".
           *
           * @see #COLUMN_INTERACTION_TYPE
           */
          int INTERACTION_TYPE_VIEWERS = 6;
  
          /**
           * The type of this program content.
           *
           * <p>The value should match one of the followings:
           * {@link #TYPE_MOVIE},
           * {@link #TYPE_TV_SERIES},
           * {@link #TYPE_TV_SEASON},
           * {@link #TYPE_TV_EPISODE},
           * {@link #TYPE_CLIP},
           * {@link #TYPE_EVENT},
           * {@link #TYPE_CHANNEL},
           * {@link #TYPE_TRACK},
           * {@link #TYPE_ALBUM},
           * {@link #TYPE_ARTIST},
           * {@link #TYPE_PLAYLIST}, and
           * {@link #TYPE_STATION}.
           *
           * <p>This is a required field if the program is from a {@link Channels#TYPE_PREVIEW}
           * channel.
           *
           * <p>Type: INTEGER
           */
          String COLUMN_TYPE = "type";
  
          /**
           * The aspect ratio of the poster art for this TV program.
           *
           * <p>The value should match one of the followings:
           * {@link #ASPECT_RATIO_16_9},
           * {@link #ASPECT_RATIO_3_2},
           * {@link #ASPECT_RATIO_4_3},
           * {@link #ASPECT_RATIO_1_1}, and
           * {@link #ASPECT_RATIO_2_3}.
           *
           * <p>Type: INTEGER
           */
          String COLUMN_POSTER_ART_ASPECT_RATIO = "poster_art_aspect_ratio";
  
          /**
           * The aspect ratio of the thumbnail for this TV program.
           *
           * <p>The value should match one of the followings:
           * {@link #ASPECT_RATIO_16_9},
           * {@link #ASPECT_RATIO_3_2},
           * {@link #ASPECT_RATIO_4_3},
           * {@link #ASPECT_RATIO_1_1}, and
           * {@link #ASPECT_RATIO_2_3}.
           *
           * <p>Type: INTEGER
           */
          String COLUMN_THUMBNAIL_ASPECT_RATIO = "poster_thumbnail_aspect_ratio";
  
          /**
           * The URI for the logo of this TV program.
           *
           * <p>This is a small badge shown on top of the poster art or thumbnail representing the
           * source of the content.
           *
           * <p>The data in the column must be a URL, or a URI in one of the following formats:
           *
           * <ul>
           * <li>content ({@link android.content.ContentResolver#SCHEME_CONTENT})</li>
           * <li>android.resource ({@link android.content.ContentResolver#SCHEME_ANDROID_RESOURCE})
           * </li>
           * <li>file ({@link android.content.ContentResolver#SCHEME_FILE})</li>
           * </ul>
           *
           * <p>Can be empty.
           *
           * <p>Type: TEXT
           */
          String COLUMN_LOGO_URI = "logo_uri";
  
          /**
           * The availability of this TV program.
           *
           * <p>The value should match one of the followings:
           * {@link #AVAILABILITY_AVAILABLE},
           * {@link #AVAILABILITY_FREE_WITH_SUBSCRIPTION}, and
           * {@link #AVAILABILITY_PAID_CONTENT}.
           *
           * <p>Type: INTEGER
           */
          String COLUMN_AVAILABILITY = "availability";
  
          /**
           * The starting price of this TV program.
           *
           * <p>This indicates the lowest regular acquisition cost of the content. It is only used
           * if the availability of the program is {@link #AVAILABILITY_PAID_CONTENT}.
           *
           * <p>Type: TEXT
           * @see #COLUMN_OFFER_PRICE
           */
          String COLUMN_STARTING_PRICE = "starting_price";
  
          /**
           * The offer price of this TV program.
           *
           * <p>This is the promotional cost of the content. It is only used if the availability of
           * the program is {@link #AVAILABILITY_PAID_CONTENT}.
           *
           * <p>Type: TEXT
           * @see #COLUMN_STARTING_PRICE
           */
          String COLUMN_OFFER_PRICE = "offer_price";
  
          /**
           * The release date of this TV program.
           *
           * <p>The value should be in one of the following formats:
           * "yyyy", "yyyy-MM-dd", and "yyyy-MM-ddTHH:mm:ssZ" (UTC in ISO 8601).
           *
           * <p>Type: TEXT
           */
          String COLUMN_RELEASE_DATE = "release_date";
  
          /**
           * The count of the items included in this TV program.
           *
           * <p>This is only relevant if the program represents a collection of items such as series,
           * episodes, or music tracks.
           *
           * <p>Type: INTEGER
           */
          String COLUMN_ITEM_COUNT = "item_count";
  
          /**
           * The flag indicating whether this TV program is live or not.
           *
           * <p>A value of 1 indicates that the content is airing and should be consumed now, a value
           * of 0 indicates that the content is off the air and does not need to be consumed at the
           * present time. If not specified, the value is set to 0 (not live) by default.
           *
           * <p>Type: INTEGER (boolean)
           */
          String COLUMN_LIVE = "live";
  
          /**
           * The internal ID used by individual TV input services.
           *
           * <p>This is internal to the provider that inserted it, and should not be decoded by other
           * apps.
           *
           * <p>Can be empty.
           *
           * <p>Type: TEXT
           */
          String COLUMN_INTERNAL_PROVIDER_ID = "internal_provider_id";
  
          /**
           * The URI for the preview video.
           *
           * <p>The data in the column must be a URL, or a URI in one of the following formats:
           *
           * <ul>
           * <li>content ({@link android.content.ContentResolver#SCHEME_CONTENT})</li>
           * <li>android.resource ({@link android.content.ContentResolver#SCHEME_ANDROID_RESOURCE})
           * </li>
           * <li>file ({@link android.content.ContentResolver#SCHEME_FILE})</li>
           * </ul>
           *
           * <p>Can be empty.
           *
           * <p>Type: TEXT
           */
          String COLUMN_PREVIEW_VIDEO_URI = "preview_video_uri";
  
          /**
           * The last playback position (in milliseconds) of the original content of this preview
           * program.
           *
           * <p>Can be empty.
           *
           * <p>Type: INTEGER
           */
          String COLUMN_LAST_PLAYBACK_POSITION_MILLIS =
                  "last_playback_position_millis";
  
          /**
           * The duration (in milliseconds) of the original content of this preview program.
           *
           * <p>Can be empty.
           *
           * <p>Type: INTEGER
           */
          String COLUMN_DURATION_MILLIS = "duration_millis";
  
          /**
           * The intent URI which is launched when the preview program is selected.
           *
           * <p>The URI is created using {@link Intent#toUri} with {@link Intent#URI_INTENT_SCHEME}
           * and converted back to the original intent with {@link Intent#parseUri}. The intent is
           * launched when the user selects the preview program item.
           *
           * <p>Can be empty.
           *
           * <p>Type: TEXT
           */
          String COLUMN_INTENT_URI = "intent_uri";
  
          /**
           * The flag indicating whether this program is transient or not.
           *
           * <p>A value of 1 indicates that the channel will be automatically removed by the system on
           * reboot, and a value of 0 indicates that the channel is persistent across reboot. If not
           * specified, this value is set to 0 (not transient) by default.
           *
           * <p>Type: INTEGER (boolean)
           * @see Channels#COLUMN_TRANSIENT
           */
          String COLUMN_TRANSIENT = "transient";
  
          /**
           * The type of interaction for this TV program.
           *
           * <p> The value should match one of the followings:
           * {@link #INTERACTION_TYPE_VIEWS},
           * {@link #INTERACTION_TYPE_LISTENS},
           * {@link #INTERACTION_TYPE_FOLLOWERS},
           * {@link #INTERACTION_TYPE_FANS},
           * {@link #INTERACTION_TYPE_LIKES},
           * {@link #INTERACTION_TYPE_THUMBS}, and
           * {@link #INTERACTION_TYPE_VIEWERS}.
           *
           * <p>Type: INTEGER
           * @see #COLUMN_INTERACTION_COUNT
           */
          String COLUMN_INTERACTION_TYPE = "interaction_type";
  
          /**
           * The interaction count for this program.
           *
           * <p>This indicates the number of times interaction has happened.
           *
           * <p>Type: INTEGER (long)
           * @see #COLUMN_INTERACTION_TYPE
           */
          String COLUMN_INTERACTION_COUNT = "interaction_count";
  
          /**
           * The author or artist of this content.
           *
           * <p>Type: TEXT
           */
          String COLUMN_AUTHOR = "author";
  
          /**
           * The flag indicating whether this TV program is browsable or not.
           *
           * <p>This column can only be set by applications having proper system permission. For
           * other applications, this is a read-only column.
           *
           * <p>A value of 1 indicates that the program is browsable and can be shown to users in
           * the UI. A value of 0 indicates that the program should be hidden from users and the
           * application who changes this value to 0 should send
           * {@link #ACTION_WATCH_NEXT_PROGRAM_BROWSABLE_DISABLED} to the owner of the program
           * to notify this change.
           *
           * <p>This value is set to 1 (browsable) by default.
           *
           * <p>Type: INTEGER (boolean)
           */
          String COLUMN_BROWSABLE = "browsable";
  
          /**
           * The content ID of this TV program.
           *
           * <p>A public ID of the content which allows the application to apply the same operation to
           * all the program copies in different channels.
           *
           * <p>Can be empty.
           *
           * <p>Type: TEXT
           */
          String COLUMN_CONTENT_ID = "content_id";
  
      }
  
      /** Column definitions for the TV channels table. */
      public static final class Channels implements BaseTvColumns {
  
          /**
           * The content:// style URI for this table.
           *
           * <p>SQL selection is not supported for {@link ContentResolver#query},
           * {@link ContentResolver#update} and {@link ContentResolver#delete} operations.
           */
          public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/"
                  + PATH_CHANNEL);
  
          /** The MIME type of a directory of TV channels. */
          public static final String CONTENT_TYPE = "vnd.android.cursor.dir/channel";
  
          /** The MIME type of a single TV channel. */
          public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/channel";
  
          /** @hide */
          @StringDef(prefix = { "TYPE_" }, value = {
                  TYPE_OTHER,
                  TYPE_NTSC,
                  TYPE_PAL,
                  TYPE_SECAM,
                  TYPE_DVB_T,
                  TYPE_DVB_T2,
                  TYPE_DVB_S,
                  TYPE_DVB_S2,
                  TYPE_DVB_C,
                  TYPE_DVB_C2,
                  TYPE_DVB_H,
                  TYPE_DVB_SH,
                  TYPE_ATSC_T,
                  TYPE_ATSC_C,
                  TYPE_ATSC_M_H,
                  TYPE_ISDB_T,
                  TYPE_ISDB_TB,
                  TYPE_ISDB_S,
                  TYPE_ISDB_S3,
                  TYPE_ISDB_C,
                  TYPE_1SEG,
                  TYPE_DTMB,
                  TYPE_CMMB,
                  TYPE_T_DMB,
                  TYPE_S_DMB,
                  TYPE_PREVIEW,
          })
          @Retention(RetentionPolicy.SOURCE)
          public @interface Type {}
  
          /**
           * A generic channel type.
           *
           * Use this if the current channel is streaming-based or its broadcast system type does not
           * fit under any other types. This is the default channel type.
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_OTHER = "TYPE_OTHER";
  
          /**
           * The channel type for NTSC.
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_NTSC = "TYPE_NTSC";
  
          /**
           * The channel type for PAL.
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_PAL = "TYPE_PAL";
  
          /**
           * The channel type for SECAM.
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_SECAM = "TYPE_SECAM";
  
          /**
           * The channel type for DVB-T (terrestrial).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_DVB_T = "TYPE_DVB_T";
  
          /**
           * The channel type for DVB-T2 (terrestrial).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_DVB_T2 = "TYPE_DVB_T2";
  
          /**
           * The channel type for DVB-S (satellite).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_DVB_S = "TYPE_DVB_S";
  
          /**
           * The channel type for DVB-S2 (satellite).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_DVB_S2 = "TYPE_DVB_S2";
  
          /**
           * The channel type for DVB-C (cable).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_DVB_C = "TYPE_DVB_C";
  
          /**
           * The channel type for DVB-C2 (cable).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_DVB_C2 = "TYPE_DVB_C2";
  
          /**
           * The channel type for DVB-H (handheld).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_DVB_H = "TYPE_DVB_H";
  
          /**
           * The channel type for DVB-SH (satellite).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_DVB_SH = "TYPE_DVB_SH";
  
          /**
           * The channel type for ATSC (terrestrial).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_ATSC_T = "TYPE_ATSC_T";
  
          /**
           * The channel type for ATSC (cable).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_ATSC_C = "TYPE_ATSC_C";
  
          /**
           * The channel type for ATSC-M/H (mobile/handheld).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_ATSC_M_H = "TYPE_ATSC_M_H";
  
          /**
           * The channel type for ISDB-T (terrestrial).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_ISDB_T = "TYPE_ISDB_T";
  
          /**
           * The channel type for ISDB-Tb (Brazil).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_ISDB_TB = "TYPE_ISDB_TB";
  
          /**
           * The channel type for ISDB-S (satellite).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_ISDB_S = "TYPE_ISDB_S";
  
          /**
           * The channel type for ISDB-S3 (satellite).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_ISDB_S3 = "TYPE_ISDB_S3";
  
          /**
           * The channel type for ISDB-C (cable).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_ISDB_C = "TYPE_ISDB_C";
  
          /**
           * The channel type for 1seg (handheld).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_1SEG = "TYPE_1SEG";
  
          /**
           * The channel type for DTMB (terrestrial).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_DTMB = "TYPE_DTMB";
  
          /**
           * The channel type for CMMB (handheld).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_CMMB = "TYPE_CMMB";
  
          /**
           * The channel type for T-DMB (terrestrial).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_T_DMB = "TYPE_T_DMB";
  
          /**
           * The channel type for S-DMB (satellite).
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_S_DMB = "TYPE_S_DMB";
  
          /**
           * The channel type for preview videos.
           *
           * <P>Unlike other broadcast TV channel types, the programs in the preview channel usually
           * are promotional videos. The UI may treat the preview channels differently from the other
           * broadcast channels.
           *
           * @see #COLUMN_TYPE
           */
          public static final String TYPE_PREVIEW = "TYPE_PREVIEW";
  
          /** @hide */
          @StringDef(prefix = { "SERVICE_TYPE_" }, value = {
                  SERVICE_TYPE_OTHER,
                  SERVICE_TYPE_AUDIO_VIDEO,
                  SERVICE_TYPE_AUDIO,
          })
          @Retention(RetentionPolicy.SOURCE)
          public @interface ServiceType {}
  
          /** A generic service type. */
          public static final String SERVICE_TYPE_OTHER = "SERVICE_TYPE_OTHER";
  
          /** The service type for regular TV channels that have both audio and video. */
          public static final String SERVICE_TYPE_AUDIO_VIDEO = "SERVICE_TYPE_AUDIO_VIDEO";
  
          /** The service type for radio channels that have audio only. */
          public static final String SERVICE_TYPE_AUDIO = "SERVICE_TYPE_AUDIO";
  
          /** @hide */
          @StringDef(prefix = { "VIDEO_FORMAT_" }, value = {
                  VIDEO_FORMAT_240P,
                  VIDEO_FORMAT_360P,
                  VIDEO_FORMAT_480I,
                  VIDEO_FORMAT_576I,
                  VIDEO_FORMAT_576P,
                  VIDEO_FORMAT_720P,
                  VIDEO_FORMAT_1080I,
                  VIDEO_FORMAT_1080P,
                  VIDEO_FORMAT_2160P,
                  VIDEO_FORMAT_4320P,
          })
          @Retention(RetentionPolicy.SOURCE)
          public @interface VideoFormat {}
  
          /** The video format for 240p. */
          public static final String VIDEO_FORMAT_240P = "VIDEO_FORMAT_240P";
  
          /** The video format for 360p. */
          public static final String VIDEO_FORMAT_360P = "VIDEO_FORMAT_360P";
  
          /** The video format for 480i. */
          public static final String VIDEO_FORMAT_480I = "VIDEO_FORMAT_480I";
  
          /** The video format for 480p. */
          public static final String VIDEO_FORMAT_480P = "VIDEO_FORMAT_480P";
  
          /** The video format for 576i. */
          public static final String VIDEO_FORMAT_576I = "VIDEO_FORMAT_576I";
  
          /** The video format for 576p. */
          public static final String VIDEO_FORMAT_576P = "VIDEO_FORMAT_576P";
  
          /** The video format for 720p. */
          public static final String VIDEO_FORMAT_720P = "VIDEO_FORMAT_720P";
  
          /** The video format for 1080i. */
          public static final String VIDEO_FORMAT_1080I = "VIDEO_FORMAT_1080I";
  
          /** The video format for 1080p. */
          public static final String VIDEO_FORMAT_1080P = "VIDEO_FORMAT_1080P";
  
          /** The video format for 2160p. */
          public static final String VIDEO_FORMAT_2160P = "VIDEO_FORMAT_2160P";
  
          /** The video format for 4320p. */
          public static final String VIDEO_FORMAT_4320P = "VIDEO_FORMAT_4320P";
  
          /** @hide */
          @StringDef(prefix = { "VIDEO_RESOLUTION_" }, value = {
                  VIDEO_RESOLUTION_SD,
                  VIDEO_RESOLUTION_ED,
                  VIDEO_RESOLUTION_HD,
                  VIDEO_RESOLUTION_FHD,
                  VIDEO_RESOLUTION_UHD,
          })
          @Retention(RetentionPolicy.SOURCE)
          public @interface VideoResolution {}
  
          /** The video resolution for standard-definition. */
          public static final String VIDEO_RESOLUTION_SD = "VIDEO_RESOLUTION_SD";
  
          /** The video resolution for enhanced-definition. */
          public static final String VIDEO_RESOLUTION_ED = "VIDEO_RESOLUTION_ED";
  
          /** The video resolution for high-definition. */
          public static final String VIDEO_RESOLUTION_HD = "VIDEO_RESOLUTION_HD";
  
          /** The video resolution for full high-definition. */
          public static final String VIDEO_RESOLUTION_FHD = "VIDEO_RESOLUTION_FHD";
  
          /** The video resolution for ultra high-definition. */
          public static final String VIDEO_RESOLUTION_UHD = "VIDEO_RESOLUTION_UHD";
  
          private static final Map<String, String> VIDEO_FORMAT_TO_RESOLUTION_MAP = new HashMap<>();
  
          static {
              VIDEO_FORMAT_TO_RESOLUTION_MAP.put(VIDEO_FORMAT_480I, VIDEO_RESOLUTION_SD);
              VIDEO_FORMAT_TO_RESOLUTION_MAP.put(VIDEO_FORMAT_480P, VIDEO_RESOLUTION_ED);
              VIDEO_FORMAT_TO_RESOLUTION_MAP.put(VIDEO_FORMAT_576I, VIDEO_RESOLUTION_SD);
              VIDEO_FORMAT_TO_RESOLUTION_MAP.put(VIDEO_FORMAT_576P, VIDEO_RESOLUTION_ED);
              VIDEO_FORMAT_TO_RESOLUTION_MAP.put(VIDEO_FORMAT_720P, VIDEO_RESOLUTION_HD);
              VIDEO_FORMAT_TO_RESOLUTION_MAP.put(VIDEO_FORMAT_1080I, VIDEO_RESOLUTION_HD);
              VIDEO_FORMAT_TO_RESOLUTION_MAP.put(VIDEO_FORMAT_1080P, VIDEO_RESOLUTION_FHD);
              VIDEO_FORMAT_TO_RESOLUTION_MAP.put(VIDEO_FORMAT_2160P, VIDEO_RESOLUTION_UHD);
              VIDEO_FORMAT_TO_RESOLUTION_MAP.put(VIDEO_FORMAT_4320P, VIDEO_RESOLUTION_UHD);
          }
  
          /**
           * Returns the video resolution (definition) for a given video format.
           *
           * @param videoFormat The video format defined in {@link Channels}.
           * @return the corresponding video resolution string. {@code null} if the resolution string
           *         is not defined for the given video format.
           * @see #COLUMN_VIDEO_FORMAT
           */
          @Nullable
          public static final String getVideoResolution(@VideoFormat String videoFormat) {
              return VIDEO_FORMAT_TO_RESOLUTION_MAP.get(videoFormat);
          }
  
          /**
           * The ID of the TV input service that provides this TV channel.
           *
           * <p>Use {@link #buildInputId} to build the ID.
           *
           * <p>This is a required field.
           *
           * <p>Type: TEXT
           */
          public static final String COLUMN_INPUT_ID = "input_id";
  
          /**
           * The broadcast system type of this TV channel.
           *
           * <p>This is used to indicate the broadcast standard (e.g. ATSC, DVB or ISDB) the current
           * channel conforms to. Use {@link #TYPE_OTHER} for streaming-based channels, which is the
           * default channel type. The value should match one of the followings:
           * {@link #TYPE_1SEG},
           * {@link #TYPE_ATSC_C},
           * {@link #TYPE_ATSC_M_H},
           * {@link #TYPE_ATSC_T},
           * {@link #TYPE_CMMB},
           * {@link #TYPE_DTMB},
           * {@link #TYPE_DVB_C},
           * {@link #TYPE_DVB_C2},
           * {@link #TYPE_DVB_H},
           * {@link #TYPE_DVB_S},
           * {@link #TYPE_DVB_S2},
           * {@link #TYPE_DVB_SH},
           * {@link #TYPE_DVB_T},
           * {@link #TYPE_DVB_T2},
           * {@link #TYPE_ISDB_C},
           * {@link #TYPE_ISDB_S},
           * {@link #TYPE_ISDB_S3},
           * {@link #TYPE_ISDB_T},
           * {@link #TYPE_ISDB_TB},
           * {@link #TYPE_NTSC},
           * {@link #TYPE_OTHER},
           * {@link #TYPE_PAL},
           * {@link #TYPE_SECAM},
           * {@link #TYPE_S_DMB},
           * {@link #TYPE_T_DMB}, and
           * {@link #TYPE_PREVIEW}.
           *
           * <p>This value cannot be changed once it's set. Trying to modify it will make the update
           * fail.
           *
           * <p>This is a required field.
           *
           * <p>Type: TEXT
           */
          public static final String COLUMN_TYPE = "type";
  
          /**
           * The predefined service type of this TV channel.
           *
           * <p>This is primarily used to indicate whether the current channel is a regular TV channel
           * or a radio-like channel. Use the same coding for {@code service_type} in the underlying
           * broadcast standard if it is defined there (e.g. ATSC A/53, ETSI EN 300 468 and ARIB
           * STD-B10). Otherwise use one of the followings: {@link #SERVICE_TYPE_OTHER},
           * {@link #SERVICE_TYPE_AUDIO_VIDEO}, {@link #SERVICE_TYPE_AUDIO}
           *
           * <p>This is a required field.
           *
           * <p>Type: TEXT
           */
          public static final String COLUMN_SERVICE_TYPE = "service_type";
  
          /**
           * The original network ID of this TV channel.
           *
           * <p>It is used to identify the originating delivery system, if applicable. Use the same
           * coding for {@code original_network_id} for ETSI EN 300 468/TR 101 211 and ARIB STD-B10.
           *
           * <p>This is a required field only if the underlying broadcast standard defines the same
           * name field. Otherwise, leave empty.
           *
           * <p>Type: INTEGER
           */
          public static final String COLUMN_ORIGINAL_NETWORK_ID = "original_network_id";
  
          /**
           * The transport stream ID of this channel.
           *
           * <p>It is used to identify the Transport Stream that contains the current channel from any
           * other multiplex within a network, if applicable. Use the same coding for
           * {@code transport_stream_id} defined in ISO/IEC 13818-1 if the channel is transmitted via
           * the MPEG Transport Stream.
           *
           * <p>This is a required field only if the current channel is transmitted via the MPEG
           * Transport Stream. Leave empty otherwise.
           *
           * <p>Type: INTEGER
           */
          public static final String COLUMN_TRANSPORT_STREAM_ID = "transport_stream_id";
  
          /**
           * The service ID of this channel.
           *
           * <p>It is used to identify the current service, or channel from any other services within
           * a given Transport Stream, if applicable. Use the same coding for {@code service_id} in
           * ETSI EN 300 468 and ARIB STD-B10 or {@code program_number} in ISO/IEC 13818-1.
           *
           * <p>This is a required field only if the underlying broadcast standard defines the same
           * name field, or the current channel is transmitted via the MPEG Transport Stream. Leave
           * empty otherwise.
           *
           * <p>Type: INTEGER
           */
          public static final String COLUMN_SERVICE_ID = "service_id";
  
          /**
           * The channel number that is displayed to the user.
           *
           * <p>The format can vary depending on broadcast standard and product specification.
           *
           * <p>Type: TEXT
           */
          public static final String COLUMN_DISPLAY_NUMBER = "display_number";
  
          /**
           * The channel name that is displayed to the user.
           *
           * <p>A call sign is a good candidate to use for this purpose but any name that helps the
           * user recognize the current channel will be enough. Can also be empty depending on
           * broadcast standard.
           *
           * <p> Type: TEXT
           */
          public static final String COLUMN_DISPLAY_NAME = "display_name";
  
          /**
           * The network affiliation for this TV channel.
           *
           * <p>This is used to identify a channel that is commonly called by its network affiliation
           * instead of the display name. Examples include ABC for the channel KGO-HD, FOX for the
           * channel KTVU-HD and NBC for the channel KNTV-HD. Can be empty if not applicable.
           *
           * <p>Type: TEXT
           */
          public static final String COLUMN_NETWORK_AFFILIATION = "network_affiliation";
  
          /**
           * The description of this TV channel.
           *
           * <p>Can be empty initially.
           *
           * <p>Type: TEXT
           */
          public static final String COLUMN_DESCRIPTION = "description";
  
          /**
           * The typical video format for programs from this TV channel.
           *
           * <p>This is primarily used to filter out channels based on video format by applications.
           * The value should match one of the followings: {@link #VIDEO_FORMAT_240P},
           * {@link #VIDEO_FORMAT_360P}, {@link #VIDEO_FORMAT_480I}, {@link #VIDEO_FORMAT_480P},
           * {@link #VIDEO_FORMAT_576I}, {@link #VIDEO_FORMAT_576P}, {@link #VIDEO_FORMAT_720P},
           * {@link #VIDEO_FORMAT_1080I}, {@link #VIDEO_FORMAT_1080P}, {@link #VIDEO_FORMAT_2160P},
           * {@link #VIDEO_FORMAT_4320P}. Note that the actual video resolution of each program from a
           * given channel can vary thus one should use {@link Programs#COLUMN_VIDEO_WIDTH} and
           * {@link Programs#COLUMN_VIDEO_HEIGHT} to get more accurate video resolution.
           *
           * <p>Type: TEXT
           *
           * @see #getVideoResolution
           */
          public static final String COLUMN_VIDEO_FORMAT = "video_format";
  
          /**
           * The flag indicating whether this TV channel is browsable or not.
           *
           * <p>This column can only be set by applications having proper system permission. For
           * other applications, this is a read-only column.
           *
           * <p>A value of 1 indicates the channel is included in the channel list that applications
           * use to browse channels, a value of 0 indicates the channel is not included in the list.
           * If not specified, this value is set to 0 (not browsable) by default.
           *
           * <p>Type: INTEGER (boolean)
           */
          public static final String COLUMN_BROWSABLE = "browsable";
  
          /**
           * The flag indicating whether this TV channel is searchable or not.
           *
           * <p>The columns of searchable channels can be read by other applications that have proper
           * permission. Care must be taken not to open sensitive data.
           *
           * <p>A value of 1 indicates that the channel is searchable and its columns can be read by
           * other applications, a value of 0 indicates that the channel is hidden and its columns can
           * be read only by the package that owns the channel and the system. If not specified, this
           * value is set to 1 (searchable) by default.
           *
           * <p>Type: INTEGER (boolean)
           */
          public static final String COLUMN_SEARCHABLE = "searchable";
  
          /**
           * The flag indicating whether this TV channel is locked or not.
           *
           * <p>This is primarily used for alternative parental control to prevent unauthorized users
           * from watching the current channel regardless of the content rating. A value of 1
           * indicates the channel is locked and the user is required to enter passcode to unlock it
           * in order to watch the current program from the channel, a value of 0 indicates the
           * channel is not locked thus the user is not prompted to enter passcode If not specified,
           * this value is set to 0 (not locked) by default.
           *
           * <p>This column can only be set by applications having proper system permission to
           * modify parental control settings. For other applications, this is a read-only column.
  
           * <p>Type: INTEGER (boolean)
           */
          public static final String COLUMN_LOCKED = "locked";
  
          /**
           * The URI for the app badge icon of the app link template for this channel.
           *
           * <p>This small icon is overlaid at the bottom of the poster art specified by
           * {@link #COLUMN_APP_LINK_POSTER_ART_URI}. The data in the column must be a URI in one of
           * the following formats:
           *
           * <ul>
           * <li>content ({@link android.content.ContentResolver#SCHEME_CONTENT})</li>
           * <li>android.resource ({@link android.content.ContentResolver#SCHEME_ANDROID_RESOURCE})
           * </li>
           * <li>file ({@link android.content.ContentResolver#SCHEME_FILE})</li>
           * </ul>
           *
           * <p>The app-linking allows channel input sources to provide activity links from their live
           * channel programming to another activity. This enables content providers to increase user
           * engagement by offering the viewer other content or actions.
           *
           * <p>Type: TEXT
           * @see #COLUMN_APP_LINK_COLOR
           * @see #COLUMN_APP_LINK_INTENT_URI
           * @see #COLUMN_APP_LINK_POSTER_ART_URI
           * @see #COLUMN_APP_LINK_TEXT
           */
          public static final String COLUMN_APP_LINK_ICON_URI = "app_link_icon_uri";
  
          /**
           * The URI for the poster art used as the background of the app link template for this
           * channel.
           *
           * <p>The data in the column must be a URL, or a URI in one of the following formats:
           *
           * <ul>
           * <li>content ({@link android.content.ContentResolver#SCHEME_CONTENT})</li>
           * <li>android.resource ({@link android.content.ContentResolver#SCHEME_ANDROID_RESOURCE})
           * </li>
           * <li>file ({@link android.content.ContentResolver#SCHEME_FILE})</li>
           * </ul>
           *
           * <p>The app-linking allows channel input sources to provide activity links from their live
           * channel programming to another activity. This enables content providers to increase user
           * engagement by offering the viewer other content or actions.
           *
           * <p>Type: TEXT
           * @see #COLUMN_APP_LINK_COLOR
           * @see #COLUMN_APP_LINK_ICON_URI
           * @see #COLUMN_APP_LINK_INTENT_URI
           * @see #COLUMN_APP_LINK_TEXT
           */
          public static final String COLUMN_APP_LINK_POSTER_ART_URI = "app_link_poster_art_uri";
  
          /**
           * The link text of the app link template for this channel.
           *
           * <p>This provides a short description of the action that happens when the corresponding
           * app link is clicked.
           *
           * <p>The app-linking allows channel input sources to provide activity links from their live
           * channel programming to another activity. This enables content providers to increase user
           * engagement by offering the viewer other content or actions.
           *
           * <p>Type: TEXT
           * @see #COLUMN_APP_LINK_COLOR
           * @see #COLUMN_APP_LINK_ICON_URI
           * @see #COLUMN_APP_LINK_INTENT_URI
           * @see #COLUMN_APP_LINK_POSTER_ART_URI
           */
          public static final String COLUMN_APP_LINK_TEXT = "app_link_text";
  
          /**
           * The accent color of the app link template for this channel. This is primarily used for
           * the background color of the text box in the template.
           *
           * <p>The app-linking allows channel input sources to provide activity links from their live
           * channel programming to another activity. This enables content providers to increase user
           * engagement by offering the viewer other content or actions.
           *
           * <p>Type: INTEGER (color value)
           * @see #COLUMN_APP_LINK_ICON_URI
           * @see #COLUMN_APP_LINK_INTENT_URI
           * @see #COLUMN_APP_LINK_POSTER_ART_URI
           * @see #COLUMN_APP_LINK_TEXT
           */
          public static final String COLUMN_APP_LINK_COLOR = "app_link_color";
  
          /**
           * The intent URI of the app link for this channel.
           *
           * <p>The URI is created using {@link Intent#toUri} with {@link Intent#URI_INTENT_SCHEME}
           * and converted back to the original intent with {@link Intent#parseUri}. The intent is
           * launched when the user clicks the corresponding app link for the current channel.
           *
           * <p>The app-linking allows channel input sources to provide activity links from their live
           * channel programming to another activity. This enables content providers to increase user
           * engagement by offering the viewer other content or actions.
           *
           * <p>Type: TEXT
           * @see #COLUMN_APP_LINK_COLOR
           * @see #COLUMN_APP_LINK_ICON_URI
           * @see #COLUMN_APP_LINK_POSTER_ART_URI
           * @see #COLUMN_APP_LINK_TEXT
           */
          public static final String COLUMN_APP_LINK_INTENT_URI = "app_link_intent_uri";
  
          /**
           * The internal ID used by individual TV input services.
           *
           * <p>This is internal to the provider that inserted it, and should not be decoded by other
           * apps.
           *
           * <p>Can be empty.
           *
           * <p>Type: TEXT
           */
          public static final String COLUMN_INTERNAL_PROVIDER_ID = "internal_provider_id";
  
          /**
           * Internal data used by individual TV input services.
           *
           * <p>This is internal to the provider that inserted it, and should not be decoded by other
           * apps.
           *
           * <p>Type: BLOB
           */
          public static final String COLUMN_INTERNAL_PROVIDER_DATA = "internal_provider_data";
  
          /**
           * Internal integer flag used by individual TV input services.
           *
           * <p>This is internal to the provider that inserted it, and should not be decoded by other
           * apps.
           *
           * <p>Type: INTEGER
           */
          public static final String COLUMN_INTERNAL_PROVIDER_FLAG1 = "internal_provider_flag1";
  
          /**
           * Internal integer flag used by individual TV input services.
           *
           * <p>This is internal to the provider that inserted it, and should not be decoded by other
           * apps.
           *
           * <p>Type: INTEGER
           */
          public static final String COLUMN_INTERNAL_PROVIDER_FLAG2 = "internal_provider_flag2";
  
          /**
           * Internal integer flag used by individual TV input services.
           *
           * <p>This is internal to the provider that inserted it, and should not be decoded by other
           * apps.
           *
           * <p>Type: INTEGER
           */
          public static final String COLUMN_INTERNAL_PROVIDER_FLAG3 = "internal_provider_flag3";
  
          /**
           * Internal integer flag used by individual TV input services.
           *
           * <p>This is internal to the provider that inserted it, and should not be decoded by other
           * apps.
           *
           * <p>Type: INTEGER
           */
          public static final String COLUMN_INTERNAL_PROVIDER_FLAG4 = "internal_provider_flag4";
  
          /**
           * The version number of this row entry used by TV input services.
           *
           * <p>This is best used by sync adapters to identify the rows to update. The number can be
           * defined by individual TV input services. One may assign the same value as
           * {@code version_number} that appears in ETSI EN 300 468 or ATSC A/65, if the data are
           * coming from a TV broadcast.
           *
           * <p>Type: INTEGER
           */
          public static final String COLUMN_VERSION_NUMBER = "version_number";
  
          /**
           * The flag indicating whether this TV channel is transient or not.
           *
           * <p>A value of 1 indicates that the channel will be automatically removed by the system on
           * reboot, and a value of 0 indicates that the channel is persistent across reboot. If not
           * specified, this value is set to 0 (not transient) by default.
           *
           * <p>Type: INTEGER (boolean)
           * @see PreviewPrograms#COLUMN_TRANSIENT
           * @see WatchNextPrograms#COLUMN_TRANSIENT
           */
          public static final String COLUMN_TRANSIENT = "transient";
  
          private Channels() {}
  
          /**
           * A sub-directory of a single TV channel that represents its primary logo.
           *
           * <p>To access this directory, append {@link Channels.Logo#CONTENT_DIRECTORY} to the raw
           * channel URI.  The resulting URI represents an image file, and should be interacted
           * using ContentResolver.openAssetFileDescriptor.
           *
           * <p>Note that this sub-directory also supports opening the logo as an asset file in write
           * mode.  Callers can create or replace the primary logo associated with this channel by
           * opening the asset file and writing the full-size photo contents into it. (Make sure there
           * is no padding around the logo image.) When the file is closed, the image will be parsed,
           * sized down if necessary, and stored.
           *
           * <p>Usage example:
           * <pre>
           * public void writeChannelLogo(long channelId, byte[] logo) {
           *     Uri channelLogoUri = TvContract.buildChannelLogoUri(channelId);
           *     try {
           *         AssetFileDescriptor fd =
           *             getContentResolver().openAssetFileDescriptor(channelLogoUri, "rw");
           *         OutputStream os = fd.createOutputStream();
           *         os.write(logo);
           *         os.close();
           *         fd.close();
           *     } catch (IOException e) {
           *         // Handle error cases.
           *     }
           * }
           * </pre>
           */
          public static final class Logo {
  
              /**
               * The directory twig for this sub-table.
               */
              public static final String CONTENT_DIRECTORY = "logo";
  
              private Logo() {}
          }
      }
  
      /**
       * Column definitions for the TV programs table.
       *
       * <p>By default, the query results will be sorted by
       * {@link Programs#COLUMN_START_TIME_UTC_MILLIS} in ascending order.
       */
      public static final class Programs implements BaseTvColumns, ProgramColumns {
  
          /**
           * The content:// style URI for this table.
           *
           * <p>SQL selection is not supported for {@link ContentResolver#query},
           * {@link ContentResolver#update} and {@link ContentResolver#delete} operations.
           */
          public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/"
                  + PATH_PROGRAM);
  
          /** The MIME type of a directory of TV programs. */
          public static final String CONTENT_TYPE = "vnd.android.cursor.dir/program";
  
          /** The MIME type of a single TV program. */
          public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/program";
  
          /**
           * The ID of the TV channel that provides this TV program.
           *
           * <p>This is a part of the channel URI and matches to {@link BaseColumns#_ID}.
           *
           * <p>This is a required field.
           *
           * <p>Type: INTEGER (long)
           */
          public static final String COLUMN_CHANNEL_ID = "channel_id";
  
          /**
           * The season number of this TV program for episodic TV shows.
           *
           * <p>Can be empty.
           *
           * <p>Type: INTEGER
           *
           * @deprecated Use {@link #COLUMN_SEASON_DISPLAY_NUMBER} instead.
           */
          @Deprecated
          public static final String COLUMN_SEASON_NUMBER = "season_number";
  
          /**
           * The episode number of this TV program for episodic TV shows.
           *
           * <p>Can be empty.
           *
           * <p>Type: INTEGER
           *
           * @deprecated Use {@link #COLUMN_EPISODE_DISPLAY_NUMBER} instead.
           */
          @Deprecated
          public static final String COLUMN_EPISODE_NUMBER = "episode_number";
  
          /**
           * The start time of this TV program, in milliseconds since the epoch.
           *
           * <p>The value should be equal to or larger than {@link #COLUMN_END_TIME_UTC_MILLIS} of the
           * previous program in the same channel. In practice, start time will usually be the end
           * time of the previous program.
           *
           * <p>Can be empty if this program belongs to a {@link Channels#TYPE_PREVIEW} channel.
           *
           * <p>Type: INTEGER (long)
           */
          public static final String COLUMN_START_TIME_UTC_MILLIS = "start_time_utc_millis";
  
          /**
           * The end time of this TV program, in milliseconds since the epoch.
           *
           * <p>The value should be equal to or less than {@link #COLUMN_START_TIME_UTC_MILLIS} of the
           * next program in the same channel. In practice, end time will usually be the start time of
           * the next program.
           *
           * <p>Can be empty if this program belongs to a {@link Channels#TYPE_PREVIEW} channel.
           *
           * <p>Type: INTEGER (long)
           */
          public static final String COLUMN_END_TIME_UTC_MILLIS = "end_time_utc_millis";
  
          /**
           * The comma-separated genre string of this TV program.
           *
           * <p>Use the same language appeared in the underlying broadcast standard, if applicable.
           * (For example, one can refer to the genre strings used in Genre Descriptor of ATSC A/65 or
           * Content Descriptor of ETSI EN 300 468, if appropriate.) Otherwise, leave empty. Use
           * {@link Genres#encode} to create a text that can be stored in this column. Use
           * {@link Genres#decode} to get the broadcast genre strings from the text stored in the
           * column.
           *
           * <p>Type: TEXT
           * @see Genres#encode
           * @see Genres#decode
           */
          public static final String COLUMN_BROADCAST_GENRE = "broadcast_genre";
  
          /**
           * The flag indicating whether recording of this program is prohibited.
           *
           * <p>A value of 1 indicates that recording of this program is prohibited and application
           * will not schedule any recording for this program. A value of 0 indicates that the
           * recording is not prohibited. If not specified, this value is set to 0 (not prohibited) by
           * default.
           *
           * <p>Type: INTEGER (boolean)
           */
          public static final String COLUMN_RECORDING_PROHIBITED = "recording_prohibited";
  
          private Programs() {}
  
          /** Canonical genres for TV programs. */
          public static final class Genres {
              /** @hide */
              @StringDef({
                      FAMILY_KIDS,
                      SPORTS,
                      SHOPPING,
                      MOVIES,
                      COMEDY,
                      TRAVEL,
                      DRAMA,
                      EDUCATION,
                      ANIMAL_WILDLIFE,
                      NEWS,
                      GAMING,
                      ARTS,
                      ENTERTAINMENT,
                      LIFE_STYLE,
                      MUSIC,
                      PREMIER,
                      TECH_SCIENCE,
              })
              @Retention(RetentionPolicy.SOURCE)
              public @interface Genre {}
  
              /** The genre for Family/Kids. */
              public static final String FAMILY_KIDS = "FAMILY_KIDS";
  
              /** The genre for Sports. */
              public static final String SPORTS = "SPORTS";
  
              /** The genre for Shopping. */
              public static final String SHOPPING = "SHOPPING";
  
              /** The genre for Movies. */
              public static final String MOVIES = "MOVIES";
  
              /** The genre for Comedy. */
              public static final String COMEDY = "COMEDY";
  
              /** The genre for Travel. */
              public static final String TRAVEL = "TRAVEL";
  
              /** The genre for Drama. */
              public static final String DRAMA = "DRAMA";
  
              /** The genre for Education. */
              public static final String EDUCATION = "EDUCATION";
  
              /** The genre for Animal/Wildlife. */
              public static final String ANIMAL_WILDLIFE = "ANIMAL_WILDLIFE";
  
              /** The genre for News. */
              public static final String NEWS = "NEWS";
  
              /** The genre for Gaming. */
              public static final String GAMING = "GAMING";
  
              /** The genre for Arts. */
              public static final String ARTS = "ARTS";
  
              /** The genre for Entertainment. */
              public static final String ENTERTAINMENT = "ENTERTAINMENT";
  
              /** The genre for Life Style. */
              public static final String LIFE_STYLE = "LIFE_STYLE";
  
              /** The genre for Music. */
              public static final String MUSIC = "MUSIC";
  
              /** The genre for Premier. */
              public static final String PREMIER = "PREMIER";
  
              /** The genre for Tech/Science. */
              public static final String TECH_SCIENCE = "TECH_SCIENCE";
  
              private static final ArraySet<String> CANONICAL_GENRES = new ArraySet<>();
              static {
                  CANONICAL_GENRES.add(FAMILY_KIDS);
                  CANONICAL_GENRES.add(SPORTS);
                  CANONICAL_GENRES.add(SHOPPING);
                  CANONICAL_GENRES.add(MOVIES);
                  CANONICAL_GENRES.add(COMEDY);
                  CANONICAL_GENRES.add(TRAVEL);
                  CANONICAL_GENRES.add(DRAMA);
                  CANONICAL_GENRES.add(EDUCATION);
                  CANONICAL_GENRES.add(ANIMAL_WILDLIFE);
                  CANONICAL_GENRES.add(NEWS);
                  CANONICAL_GENRES.add(GAMING);
                  CANONICAL_GENRES.add(ARTS);
                  CANONICAL_GENRES.add(ENTERTAINMENT);
                  CANONICAL_GENRES.add(LIFE_STYLE);
                  CANONICAL_GENRES.add(MUSIC);
                  CANONICAL_GENRES.add(PREMIER);
                  CANONICAL_GENRES.add(TECH_SCIENCE);
              }
  
              private static final char DOUBLE_QUOTE = '"';
              private static final char COMMA = ',';
              private static final String DELIMITER = ",";
  
              private static final String[] EMPTY_STRING_ARRAY = new String[0];
  
              private Genres() {}
  
              /**
               * Encodes genre strings to a text that can be put into the database.
               *
               * @param genres Genre strings.
               * @return an encoded genre string that can be inserted into the
               *         {@link #COLUMN_BROADCAST_GENRE} or {@link #COLUMN_CANONICAL_GENRE} column.
               */
              public static String encode(@NonNull @Genre String... genres) {
                  if (genres == null) {
                      // MNC and before will throw a NPE.
                      return null;
                  }
                  StringBuilder sb = new StringBuilder();
                  String separator = "";
                  for (String genre : genres) {
                      sb.append(separator).append(encodeToCsv(genre));
                      separator = DELIMITER;
                  }
                  return sb.toString();
              }
  
              private static String encodeToCsv(String genre) {
                  StringBuilder sb = new StringBuilder();
                  int length = genre.length();
                  for (int i = 0; i < length; ++i) {
                      char c = genre.charAt(i);
                      switch (c) {
                          case DOUBLE_QUOTE:
                              sb.append(DOUBLE_QUOTE);
                              break;
                          case COMMA:
                              sb.append(DOUBLE_QUOTE);
                              break;
                      }
                      sb.append(c);
                  }
                  return sb.toString();
              }
  
              /**
               * Decodes the genre strings from the text stored in the database.
               *
               * @param genres The encoded genre string retrieved from the
               *            {@link #COLUMN_BROADCAST_GENRE} or {@link #COLUMN_CANONICAL_GENRE} column.
               * @return genre strings.
               */
              public static @Genre String[] decode(@NonNull String genres) {
                  if (TextUtils.isEmpty(genres)) {
                      // MNC and before will throw a NPE for {@code null} genres.
                      return EMPTY_STRING_ARRAY;
                  }
                  if (genres.indexOf(COMMA) == -1 && genres.indexOf(DOUBLE_QUOTE) == -1) {
                      return new String[] {genres.trim()};
                  }
                  StringBuilder sb = new StringBuilder();
                  List<String> results = new ArrayList<>();
                  int length = genres.length();
                  boolean escape = false;
                  for (int i = 0; i < length; ++i) {
                      char c = genres.charAt(i);
                      switch (c) {
                          case DOUBLE_QUOTE:
                              if (!escape) {
                                  escape = true;
                                  continue;
                              }
                              break;
                          case COMMA:
                              if (!escape) {
                                  String string = sb.toString().trim();
                                  if (string.length() > 0) {
                                      results.add(string);
                                  }
                                  sb = new StringBuilder();
                                  continue;
                              }
                              break;
                      }
                      sb.append(c);
                      escape = false;
                  }
                  String string = sb.toString().trim();
                  if (string.length() > 0) {
                      results.add(string);
                  }
                  return results.toArray(new String[results.size()]);
              }
  
              /**
               * Returns whether a given text is a canonical genre defined in {@link Genres}.
               *
               * @param genre The name of genre to be checked.
               * @return {@code true} if the genre is canonical, otherwise {@code false}.
               */
              public static boolean isCanonical(String genre) {
                  return CANONICAL_GENRES.contains(genre);
              }
          }
      }
  
      /**
       * Column definitions for the recorded TV programs table.
       *
       * <p>By default, the query results will be sorted by {@link #COLUMN_START_TIME_UTC_MILLIS} in
       * ascending order.
       */
      public static final class RecordedPrograms implements BaseTvColumns, ProgramColumns {
  
          /**
           * The content:// style URI for this table.
           *
           * <p>SQL selection is not supported for {@link ContentResolver#query},
           * {@link ContentResolver#update} and {@link ContentResolver#delete} operations.
           */
          public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/"
                  + PATH_RECORDED_PROGRAM);
  
          /** The MIME type of a directory of recorded TV programs. */
          public static final String CONTENT_TYPE = "vnd.android.cursor.dir/recorded_program";
  
          /** The MIME type of a single recorded TV program. */
          public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/recorded_program";
  
          /**
           * The ID of the TV channel that provides this recorded program.
           *
           * <p>This is a part of the channel URI and matches to {@link BaseColumns#_ID}.
           *
           * <p>Type: INTEGER (long)
           */
          public static final String COLUMN_CHANNEL_ID = "channel_id";
  
          /**
           * The ID of the TV input service that is associated with this recorded program.
           *
           * <p>Use {@link #buildInputId} to build the ID.
           *
           * <p>This is a required field.
           *
           * <p>Type: TEXT
           */
          public static final String COLUMN_INPUT_ID = "input_id";
  
          /**
           * The start time of the original TV program, in milliseconds since the epoch.
           *
           * <p>Type: INTEGER (long)
           * @see Programs#COLUMN_START_TIME_UTC_MILLIS
           */
          public static final String COLUMN_START_TIME_UTC_MILLIS =
                  Programs.COLUMN_START_TIME_UTC_MILLIS;
  
          /**
           * The end time of the original TV program, in milliseconds since the epoch.
           *
           * <p>Type: INTEGER (long)
           * @see Programs#COLUMN_END_TIME_UTC_MILLIS
           */
          public static final String COLUMN_END_TIME_UTC_MILLIS = Programs.COLUMN_END_TIME_UTC_MILLIS;
  
          /**
           * The comma-separated genre string of this recorded TV program.
           *
           * <p>Use the same language appeared in the underlying broadcast standard, if applicable.
           * (For example, one can refer to the genre strings used in Genre Descriptor of ATSC A/65 or
           * Content Descriptor of ETSI EN 300 468, if appropriate.) Otherwise, leave empty. Use
           * {@link Genres#encode Genres.encode()} to create a text that can be stored in this column.
           * Use {@link Genres#decode Genres.decode()} to get the broadcast genre strings from the
           * text stored in the column.
           *
           * <p>Type: TEXT
           * @see Programs#COLUMN_BROADCAST_GENRE
           */
          public static final String COLUMN_BROADCAST_GENRE = Programs.COLUMN_BROADCAST_GENRE;
  
          /**
           * The URI of the recording data for this recorded program.
           *
           * <p>Together with {@link #COLUMN_RECORDING_DATA_BYTES}, applications can use this
           * information to manage recording storage. The URI should indicate a file or directory with
           * the scheme {@link android.content.ContentResolver#SCHEME_FILE}.
           *
           * <p>Type: TEXT
           * @see #COLUMN_RECORDING_DATA_BYTES
           */
          public static final String COLUMN_RECORDING_DATA_URI = "recording_data_uri";
  
          /**
           * The data size (in bytes) for this recorded program.
           *
           * <p>Together with {@link #COLUMN_RECORDING_DATA_URI}, applications can use this
           * information to manage recording storage.
           *
           * <p>Type: INTEGER (long)
           * @see #COLUMN_RECORDING_DATA_URI
           */
          public static final String COLUMN_RECORDING_DATA_BYTES = "recording_data_bytes";
  
          /**
           * The duration (in milliseconds) of this recorded program.
           *
           * <p>The actual duration of the recorded program can differ from the one calculated by
           * {@link #COLUMN_END_TIME_UTC_MILLIS} - {@link #COLUMN_START_TIME_UTC_MILLIS} as program
           * recording can be interrupted in the middle for some reason, resulting in a partially
           * recorded program, which is still playable.
           *
           * <p>Type: INTEGER
           */
          public static final String COLUMN_RECORDING_DURATION_MILLIS = "recording_duration_millis";
  
          /**
           * The expiration time for this recorded program, in milliseconds since the epoch.
           *
           * <p>Recorded TV programs do not expire by default unless explicitly requested by the user
           * or the user allows applications to delete them in order to free up disk space for future
           * recording. However, some TV content can have expiration date set by the content provider
           * when recorded. This field is used to indicate such a restriction.
           *
           * <p>Can be empty.
           *
           * <p>Type: INTEGER (long)
           */
          public static final String COLUMN_RECORDING_EXPIRE_TIME_UTC_MILLIS =
                  "recording_expire_time_utc_millis";
  
          private RecordedPrograms() {}
      }
  
      /**
       * Column definitions for the preview TV programs table.
       */
      public static final class PreviewPrograms implements BaseTvColumns, ProgramColumns,
          PreviewProgramColumns {
  
          /**
           * The content:// style URI for this table.
           *
           * <p>SQL selection is not supported for {@link ContentResolver#query},
           * {@link ContentResolver#update} and {@link ContentResolver#delete} operations.
           */
          public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/"
                  + PATH_PREVIEW_PROGRAM);
  
          /** The MIME type of a directory of preview TV programs. */
          public static final String CONTENT_TYPE = "vnd.android.cursor.dir/preview_program";
  
          /** The MIME type of a single preview TV program. */
          public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/preview_program";
  
          /**
           * The ID of the TV channel that provides this TV program.
           *
           * <p>This value cannot be changed once it's set. Trying to modify it will make the update
           * fail.
           *
           * <p>This is a part of the channel URI and matches to {@link BaseColumns#_ID}.
           *
           * <p>This is a required field.
           *
           * <p>Type: INTEGER (long)
           */
          public static final String COLUMN_CHANNEL_ID = "channel_id";
  
          /**
           * The weight of the preview program within the channel.
           *
           * <p>The UI may choose to show this item in a different position in the channel row.
           * A larger weight value means the program is more important than other programs having
           * smaller weight values. The value is relevant for the preview programs in the same
           * channel. This is only relevant to {@link Channels#TYPE_PREVIEW}.
           *
           * <p>Can be empty.
           *
           * <p>Type: INTEGER
           */
          public static final String COLUMN_WEIGHT = "weight";
  
          private PreviewPrograms() {}
      }
  
      /**
       * Column definitions for the "watch next" TV programs table.
       */
      public static final class WatchNextPrograms implements BaseTvColumns, ProgramColumns,
          PreviewProgramColumns {
  
          /**
           * The content:// style URI for this table.
           *
           * <p>SQL selection is not supported for {@link ContentResolver#query},
           * {@link ContentResolver#update} and {@link ContentResolver#delete} operations.
           */
          public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/"
                  + PATH_WATCH_NEXT_PROGRAM);
  
          /** The MIME type of a directory of "watch next" TV programs. */
          public static final String CONTENT_TYPE = "vnd.android.cursor.dir/watch_next_program";
  
          /** The MIME type of a single preview TV program. */
          public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/watch_next_program";
  
          /** @hide */
          @IntDef({
                  WATCH_NEXT_TYPE_CONTINUE,
                  WATCH_NEXT_TYPE_NEXT,
                  WATCH_NEXT_TYPE_NEW,
                  WATCH_NEXT_TYPE_WATCHLIST,
          })
          @Retention(RetentionPolicy.SOURCE)
          public @interface WatchNextType {}
  
          /**
           * The watch next type for CONTINUE. Use this type when the user has already watched more
           * than 1 minute of this content.
           *
           * @see #COLUMN_WATCH_NEXT_TYPE
           */
          public static final int WATCH_NEXT_TYPE_CONTINUE = 0;
  
          /**
           * The watch next type for NEXT. Use this type when the user has watched one or more
           * complete episodes from some episodic content, but there remains more than one episode
           * remaining or there is one last episode remaining, but it is not “new” in that it was
           * released before the user started watching the show.
           *
           * @see #COLUMN_WATCH_NEXT_TYPE
           */
          public static final int WATCH_NEXT_TYPE_NEXT = 1;
  
          /**
           * The watch next type for NEW. Use this type when the user had watched all of the available
           * episodes from some episodic content, but a new episode became available since the user
           * started watching the first episode and now there is exactly one unwatched episode. This
           * could also work for recorded events in a series e.g. soccer matches or football games.
           *
           * @see #COLUMN_WATCH_NEXT_TYPE
           */
          public static final int WATCH_NEXT_TYPE_NEW = 2;
  
          /**
           * The watch next type for WATCHLIST. Use this type when the user has elected to explicitly
           * add a movie, event or series to a “watchlist” as a manual way of curating what they
           * want to watch next.
           *
           * @see #COLUMN_WATCH_NEXT_TYPE
           */
          public static final int WATCH_NEXT_TYPE_WATCHLIST = 3;
  
          /**
           * The "watch next" type of this program content.
           *
           * <p>The value should match one of the followings:
           * {@link #WATCH_NEXT_TYPE_CONTINUE},
           * {@link #WATCH_NEXT_TYPE_NEXT},
           * {@link #WATCH_NEXT_TYPE_NEW}, and
           * {@link #WATCH_NEXT_TYPE_WATCHLIST}.
           *
           * <p>This is a required field.
           *
           * <p>Type: INTEGER
           */
          public static final String COLUMN_WATCH_NEXT_TYPE = "watch_next_type";
  
          /**
           * The last UTC time that the user engaged in this TV program, in milliseconds since the
           * epoch. This is a hint for the application that is used for ordering of "watch next"
           * programs.
           *
           * <p>The meaning of the value varies depending on the {@link #COLUMN_WATCH_NEXT_TYPE}:
           * <ul>
           *     <li>{@link #WATCH_NEXT_TYPE_CONTINUE}: the date that the user was last watching the
           *     content.</li>
           *     <li>{@link #WATCH_NEXT_TYPE_NEXT}: the date of the last episode watched.</li>
           *     <li>{@link #WATCH_NEXT_TYPE_NEW}: the release date of the new episode.</li>
           *     <li>{@link #WATCH_NEXT_TYPE_WATCHLIST}: the date the item was added to the Watchlist.
           *     </li>
           * </ul>
           *
           * <p>This is a required field.
           *
           * <p>Type: INTEGER (long)
           */
          public static final String COLUMN_LAST_ENGAGEMENT_TIME_UTC_MILLIS =
                  "last_engagement_time_utc_millis";
  
          private WatchNextPrograms() {}
      }
  
      /**
       * Column definitions for the TV programs that the user watched. Applications do not have access
       * to this table.
       *
       * <p>By default, the query results will be sorted by
       * {@link WatchedPrograms#COLUMN_WATCH_START_TIME_UTC_MILLIS} in descending order.
       * @hide
       */
      @SystemApi
      public static final class WatchedPrograms implements BaseTvColumns {
  
          /** The content:// style URI for this table. */
          public static final Uri CONTENT_URI =
                  Uri.parse("content://" + AUTHORITY + "/watched_program");
  
          /** The MIME type of a directory of watched programs. */
          public static final String CONTENT_TYPE = "vnd.android.cursor.dir/watched_program";
  
          /** The MIME type of a single item in this table. */
          public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/watched_program";
  
          /**
           * The UTC time that the user started watching this TV program, in milliseconds since the
           * epoch.
           *
           * <p>Type: INTEGER (long)
           */
          public static final String COLUMN_WATCH_START_TIME_UTC_MILLIS =
                  "watch_start_time_utc_millis";
  
          /**
           * The UTC time that the user stopped watching this TV program, in milliseconds since the
           * epoch.
           *
           * <p>Type: INTEGER (long)
           */
          public static final String COLUMN_WATCH_END_TIME_UTC_MILLIS = "watch_end_time_utc_millis";
  
          /**
           * The ID of the TV channel that provides this TV program.
           *
           * <p>This is a required field.
           *
           * <p>Type: INTEGER (long)
           */
          public static final String COLUMN_CHANNEL_ID = "channel_id";
  
          /**
           * The title of this TV program.
           *
           * <p>Type: TEXT
           */
          public static final String COLUMN_TITLE = "title";
  
          /**
           * The start time of this TV program, in milliseconds since the epoch.
           *
           * <p>Type: INTEGER (long)
           */
          public static final String COLUMN_START_TIME_UTC_MILLIS = "start_time_utc_millis";
  
          /**
           * The end time of this TV program, in milliseconds since the epoch.
           *
           * <p>Type: INTEGER (long)
           */
          public static final String COLUMN_END_TIME_UTC_MILLIS = "end_time_utc_millis";
  
          /**
           * The description of this TV program.
           *
           * <p>Type: TEXT
           */
          public static final String COLUMN_DESCRIPTION = "description";
  
          /**
           * Extra parameters given to {@link TvInputService.Session#tune(Uri, android.os.Bundle)
           * TvInputService.Session.tune(Uri, android.os.Bundle)} when tuning to the channel that
           * provides this TV program. (Used internally.)
           *
           * <p>This column contains an encoded string that represents comma-separated key-value pairs of
           * the tune parameters. (Ex. "[key1]=[value1], [key2]=[value2]"). '%' is used as an escape
           * character for '%', '=', and ','.
           *
           * <p>Type: TEXT
           */
          public static final String COLUMN_INTERNAL_TUNE_PARAMS = "tune_params";
  
          /**
           * The session token of this TV program. (Used internally.)
           *
           * <p>This contains a String representation of {@link IBinder} for
           * {@link TvInputService.Session} that provides the current TV program. It is used
           * internally to distinguish watched programs entries from different TV input sessions.
           *
           * <p>Type: TEXT
           */
          public static final String COLUMN_INTERNAL_SESSION_TOKEN = "session_token";
  
          private WatchedPrograms() {}
      }
  }
  