我想开发一个应用程序BLE为Android。

I am trying to develop a BLE application for Android.

时的任何方式，通过它我可以检测和读取UDID，专业，烽火小Android设备？

Is the any way through which i can detect and read UDID, Major, Minor of beacon on android devices?

我看了RadiusNetworks Android的ibeacon服务，但我不明白为什么：

I have read the RadiusNetworks android-ibeacon-service, but I can't understand why:

major = (256 * (0xFF & paramArrayOfByte[(i + 20)]) +
 (0xFF & paramArrayOfByte[(i + 21)]));

其中 paramArrayOfByte 是 LeScanCallback byte []的scanRecord

推荐答案

在获得字节[] scanRecord 从 BluetoothAdapter.LeScanCallback ，它将包括蓝牙LE标头，它可以是可变长度取决于iBeacon的类型。

When you get the byte[] scanRecord from BluetoothAdapter.LeScanCallback, it will include the Bluetooth LE headers, which can be variable length depending on the type of iBeacon.

由于可变长度的头四个字节表示一个iBeacon广告（ 4C 00 02 15 ）可以在任何地方开始从第三个字节（ scanRecord [2] ），一直到第六个字节（ scanRecord [5] ）。在最新code ，在的Andr​​oid iBeacon库找到的 4C 00 02 15 在 scanRecord ，并称其为 startByte 。一切是在一个固定的位置，相对于 startByte 。

Because of the variable length headers the four bytes that indicate an iBeacon advertisement (4c 00 02 15) may begin anywhere from the third byte (scanRecord[2]) up to the sixth byte (scanRecord[5]). In the latest code, the Android iBeacon Library finds the index position of the 4c 00 02 15 within the scanRecord and calls it the startByte. Everything else is at a fixed position relative to that startByte.