PlayPauseButtonState

@UnstableApi
class PlayPauseButtonState

State that converts the necessary information from the Player to correctly deal with a UI component representing a PlayPause button.

Summary

Public constructors
`PlayPauseButtonState(player: Player?)`

Public functions
`suspend Unit`	`observe()` Subscribes to updates from `Player.Events` and listens to
`Unit`	`onClick()` Handles the interaction with the PlayPause button according to the current state of the `Player`.

Public properties
`Boolean`	`isEnabled` true if `player` is not `null`, `Player.COMMAND_PLAY_PAUSE` is available and we have something in the `Timeline` to play.
`Boolean`	`showPlay` true if `player` is `null` or `shouldShowPlayButton` is true.

PlayPauseButtonState(player: Player?)

suspend fun observe(): Unit

Subscribes to updates from Player.Events and listens to

Player.EVENT_PLAYBACK_STATE_CHANGED and Player.EVENT_PLAY_WHEN_READY_CHANGED in order to determine whether a play or a pause button should be presented on a UI element for playback control.
Player.EVENT_AVAILABLE_COMMANDS_CHANGED in order to determine whether the button should be enabled, i.e. respond to user input.

fun onClick(): Unit

Handles the interaction with the PlayPause button according to the current state of the Player.

It will have no effect if no suitable player method is available to handle the play request.

See also
`handlePlayButtonAction`
`handlePauseButtonAction`
`shouldShowPlayButton`
`COMMAND_PLAY_PAUSE`
`COMMAND_GET_CURRENT_MEDIA_ITEM`

val isEnabled: Boolean

true if player is not null, Player.COMMAND_PLAY_PAUSE is available and we have something in the Timeline to play. See shouldEnablePlayPauseButton for more details.

val showPlay: Boolean

true if player is null or shouldShowPlayButton is true.