MainActivity.kt

private fun updatePictureInPictureParams(started: Boolean): PictureInPictureParams {
        val visibleRect = Rect()
        binding.timerBackground.getGlobalVisibleRect(visibleRect)
        val params = PictureInPictureParams.Builder()
            .setActions(
                listOf(
                    if (started) {
                        createRemoteAction(
                            R.drawable.ic_pause_24dp,
                            R.string.pause,
                            START_OR_PAUSE_TIME,
                            CONTROL_TYPE_START_OR_PAUSE
                        )
                    } else {
                        createRemoteAction(
                            R.drawable.ic_play_arrow_24dp,
                            R.string.start,
                            START_OR_PAUSE_TIME,
                            CONTROL_TYPE_START_OR_PAUSE
                        )
                    }
                )
            )
            .setAspectRatio(Rational(16, 9))
            .setSourceRectHint(visibleRect)
            .setAutoEnterEnabled(true)
            .setSeamlessResizeEnabled(false)
            .build()
        setPictureInPictureParams(params)
        return params
    }