Package com.google.android.exoplayer2.ext.media2

## Interface SessionCallbackBuilder.AllowedCommandProvider

- All Known Implementing Classes:
    `SessionCallbackBuilder.DefaultAllowedCommandProvider`
  Enclosing class:
    SessionCallbackBuilder

      public static interface SessionCallbackBuilder.AllowedCommandProvider

  Provides allowed commands for `MediaController`.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `boolean` | `acceptConnection​(androidx.media2.session.MediaSession session, androidx.media2.session.MediaSession.ControllerInfo controllerInfo)` | Called to query whether to allow connection from the controller.
    `androidx.media2.session.SessionCommandGroup` | `getAllowedCommands​(androidx.media2.session.MediaSession session, androidx.media2.session.MediaSession.ControllerInfo controllerInfo, androidx.media2.session.SessionCommandGroup baseAllowedSessionCommand)` | Called to query allowed commands in following cases: A `MediaController` requests to connect, and allowed commands is required to tell initial allowed commands.
    `int` | `onCommandRequest​(androidx.media2.session.MediaSession session, androidx.media2.session.MediaSession.ControllerInfo controllerInfo, androidx.media2.session.SessionCommand command)` | Called when a `MediaController` has called an API that controls `SessionPlayer` set to the `MediaSession`.

- - ### Method Detail

    - #### acceptConnection

          boolean acceptConnection​(androidx.media2.session.MediaSession session,
                                   androidx.media2.session.MediaSession.ControllerInfo controllerInfo)

      Called to query whether to allow connection from the controller.

      If it returns `true` to accept connection, then `getAllowedCommands(androidx.media2.session.MediaSession, androidx.media2.session.MediaSession.ControllerInfo, androidx.media2.session.SessionCommandGroup)` will be immediately followed to return initial allowed command.

      Prefer use `SessionCallbackBuilder.PostConnectCallback` for any extra initialization about controller, where controller is connected and session can send commands to the controller.

      Parameters:
        `session` - The media session.
        `controllerInfo` - The `MediaSession.ControllerInfo` for the controller that is requesting connect.
      Returns:
        `true` to accept connection. `false` otherwise.

    - #### getAllowedCommands

          androidx.media2.session.SessionCommandGroup getAllowedCommands​(androidx.media2.session.MediaSession session,
                                                                         androidx.media2.session.MediaSession.ControllerInfo controllerInfo,
                                                                         androidx.media2.session.SessionCommandGroup baseAllowedSessionCommand)

      Called to query allowed commands in following cases:
      - A `MediaController` requests to connect, and allowed commands is required to tell initial allowed commands.
      - Underlying `SessionPlayer` state changes, and allowed commands may be updated via `MediaSession.setAllowedCommands(androidx.media2.session.MediaSession.ControllerInfo, androidx.media2.session.SessionCommandGroup)`.

      The provided `baseAllowedSessionCommand` is built automatically based on the state of the `SessionPlayer`, `SessionCallbackBuilder.RatingCallback`, `SessionCallbackBuilder.MediaItemProvider`, `SessionCallbackBuilder.CustomCommandProvider`, and `SessionCallbackBuilder.SkipCallback` so may be a useful starting point for any required customizations.

      Parameters:
        `session` - The media session.
        `controllerInfo` - The `MediaSession.ControllerInfo` for the controller for which allowed commands are being queried.
        `baseAllowedSessionCommand` - Base allowed session commands for customization.
      Returns:
        The allowed commands for the controller.
      See Also:
        `MediaSession.SessionCallback.onConnect(MediaSession, ControllerInfo)`

    - #### onCommandRequest

          int onCommandRequest​(androidx.media2.session.MediaSession session,
                               androidx.media2.session.MediaSession.ControllerInfo controllerInfo,
                               androidx.media2.session.SessionCommand command)

      Called when a `MediaController` has called an API that controls `SessionPlayer` set to the `MediaSession`.
      Parameters:
        `session` - The media session.
        `controllerInfo` - A `MediaSession.ControllerInfo` that needs allowed command update.
        `command` - A `SessionCommand` from the controller.
      Returns:
        A session result code defined in `SessionResult`.
      See Also:
        `MediaSession.SessionCallback.onCommandRequest(androidx.media2.session.MediaSession, androidx.media2.session.MediaSession.ControllerInfo, androidx.media2.session.SessionCommand)`