Bluetooth LE - 如何获得以毫秒为单位的广告间隔？

Question

我必须以毫秒为单位获取广告间隔。 我使用result.periodicAdvertisingInterval但这返回 0。我必须实现这样的事情：

private val scanCallback = object : ScanCallback(){
    @RequiresApi(Build.VERSION_CODES.N)
    @SuppressLint("MissingPermission", "NotifyDataSetChanged")

    override fun onScanResult(callbackType: Int, result: ScanResult) {

       val scanJob = CoroutineScope(Dispatchers.Main).launch {
            val tag = deviceMap.computeIfAbsent(result.device.address) {
                val newTag = BleTag(result.device.name ?: "Unbekannt", result.device.address, result.rssi , result.scanRecord?.bytes, "")
                deviceList.add(newTag)
                newTag
            }
            tag.name = result.device.name ?: "Unbekannt"
            tag.rssi = result.rssi
            tag.advertisementData = result.scanRecord?.bytes
        }

        deviceList.sortBy {result.rssi }

        recyclerView.adapter?.notifyDataSetChanged()
        menu.findItem(R.id.count).title = "Geräte: " + deviceList.size

        super.onScanResult(callbackType, result)
    }

    override fun onScanFailed(errorCode: Int) {
        super.onScanFailed(errorCode)
        Log.e("Scan failed","")
    }
}

Answer 1

这个结果是通过减去同一设备的两个连续广告的时间戳获得的。