/**
* Obtains BLE advertisement data and checks if it is an iBeacon
*
* @param data the advertisement data
* @return the IBeacon found or null if not an iBeacon
*/
private IBeacon parseAdvertisementData(byte[] data) {
Log.i(Utils.LOG_TAG, Arrays.toString(data));
// First, check the prefix for our beacons
if (data[0] == 0x02
&& data[1] == 0x01
&& data[4] == (byte) 0xFF
&& data[7] == 0x02) { // iBeacon candidate
byte[] uuid =
Arrays.copyOfRange(data, ADV_PREFIX_LENGTH, ADV_PREFIX_LENGTH + ADV_UUID_LENGTH);
// Now filter beacons based on UUID if any
if (_uuid == null || Arrays.equals(_uuid, uuid)) {
int offset = ADV_PREFIX_LENGTH + ADV_UUID_LENGTH;
IBeacon ibeacon = new IBeacon();
ibeacon.setUuid(uuid);
int major = ((data[offset] << 8) & 0x0000ff00) | (data[offset + 1] & 0x000000ff);
ibeacon.setMajor(major);
int minor = ((data[offset + 2] << 8) & 0x0000ff00) | (data[offset + 3] & 0x000000ff);
ibeacon.setMinor(minor);
ibeacon.setPowerValue(data[offset + 4]);
return ibeacon;
}
}
return null;
}
