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IBeacon是BLE的一種，搜索iBeacon基站關鍵在于設備掃描到的scanRecord數組，識別是否有下面加粗斜體的02 15這兩個數字。如果有，搜索到的藍牙設備就是IBeacon。
// AirLocate:
// 02 01 1a 1a ff 4c 00 02 15 # Apple's fixed iBeacon advertising prefix
// e2 c5 6d b5 df fb 48 d2 b0 60 d0 f5 a7 10 96 e0 # iBeacon profile uuid
// 00 00 # major
// 00 00 # minor
// c5 # The 2's complement of the calibrated Tx Power
下面分步驟來實現檢測IBeacon熱點。
一、獲得手機藍牙控制權限
在manifest 文件中寫上：
<uses-permission android:name="android.permission.BLUETOOTH"/> <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
二、檢測手機是否支持藍牙，并獲取mBluetoothAdapter 對象
if (!getPackageManager().hasSystemFeature(
PackageManager.FEATURE_BLUETOOTH_LE))
{
Toast.makeText(this, R.string.ble_not_supported, Toast.LENGTH_SHORT)
.show();
finish();
}
final BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
mBluetoothAdapter = bluetoothManager.getAdapter();
if (mBluetoothAdapter == null)
{
Toast.makeText(this, R.string.error_bluetooth_not_supported,
Toast.LENGTH_SHORT).show();
finish();
return;
}
三、實現LeScanCallback回調接口
設備每次檢測到一個藍牙設備，就會回調這個接口中的onLeScan()方法，并且傳入掃描到的device，rssi，scanRecord等參數。
private BluetoothAdapter.LeScanCallback mLeScanCallback = new BluetoothAdapter.LeScanCallback()
{
@Override
public void onLeScan(final BluetoothDevice device, int rssi,
byte[] scanRecord)
{
//在這里處理掃描到的參數
//判斷是不是IBeacon設備，做相應的處理。
}
};
四、處理掃描到的參數的方法
public class iBeaconClass
{
static public class iBeacon
{
public String name;
public int major;
public int minor;
public String proximityUuid;
public String bluetoothAddress;
public int txPower;
public int rssi;
}
/**
* 將掃描到的信息傳入這個方法
* 該方法會判斷掃描到的設備是不是IBeacon
* 如果是就返回一個IBeacon對象
* 如果不是就返回null
* @param device
* @param rssi
* @param scanData
* @return
*/
public static iBeacon fromScanData(BluetoothDevice device, int rssi,
byte[] scanData)
{
int startByte = 2;
boolean patternFound = false;
while (startByte <= 5)
{
if (((int) scanData[startByte + 2] & 0xff) == 0x02
&& ((int) scanData[startByte + 3] & 0xff) == 0x15)
{
// yes! This is an iBeacon
patternFound = true;
break;
} else if (((int) scanData[startByte] & 0xff) == 0x2d
&& ((int) scanData[startByte + 1] & 0xff) == 0x24
&& ((int) scanData[startByte + 2] & 0xff) == 0xbf
&& ((int) scanData[startByte + 3] & 0xff) == 0x16)
{
iBeacon iBeacon = new iBeacon();
iBeacon.major = 0;
iBeacon.minor = 0;
iBeacon.proximityUuid = "00000000-0000-0000-0000-000000000000";
iBeacon.txPower = -55;
return iBeacon;
} else if (((int) scanData[startByte] & 0xff) == 0xad
&& ((int) scanData[startByte + 1] & 0xff) == 0x77
&& ((int) scanData[startByte + 2] & 0xff) == 0x00
&& ((int) scanData[startByte + 3] & 0xff) == 0xc6)
{
iBeacon iBeacon = new iBeacon();
iBeacon.major = 0;
iBeacon.minor = 0;
iBeacon.proximityUuid = "00000000-0000-0000-0000-000000000000";
iBeacon.txPower = -55;
return iBeacon;
}
startByte++;
}
if (patternFound == false)
{
// This is not an iBeacon
return null;
}
iBeacon iBeacon = new iBeacon();
iBeacon.major = (scanData[startByte + 20] & 0xff) * 0x100
+ (scanData[startByte + 21] & 0xff);
iBeacon.minor = (scanData[startByte + 22] & 0xff) * 0x100
+ (scanData[startByte + 23] & 0xff);
iBeacon.txPower = (int) scanData[startByte + 24]; // this one is signed
iBeacon.rssi = rssi;
// AirLocate:
// 02 01 1a 1a ff 4c 00 02 15 # Apple's fixed iBeacon advertising prefix
// e2 c5 6d b5 df fb 48 d2 b0 60 d0 f5 a7 10 96 e0 # iBeacon profile
// uuid
// 00 00 # major
// 00 00 # minor
// c5 # The 2's complement of the calibrated Tx Power
// Estimote:
// 02 01 1a 11 07 2d 24 bf 16
// 394b31ba3f486415ab376e5c0f09457374696d6f7465426561636f6e00000000000000000000000000000000000000000000000000
byte[] proximityUuidBytes = new byte[16];
System.arraycopy(scanData, startByte + 4, proximityUuidBytes, 0, 16);
String hexString = bytesToHexString(proximityUuidBytes);
StringBuilder sb = new StringBuilder();
sb.append(hexString.substring(0, 8));
sb.append("-");
sb.append(hexString.substring(8, 12));
sb.append("-");
sb.append(hexString.substring(12, 16));
sb.append("-");
sb.append(hexString.substring(16, 20));
sb.append("-");
sb.append(hexString.substring(20, 32));
iBeacon.proximityUuid = sb.toString();
if (device != null)
{
iBeacon.bluetoothAddress = device.getAddress();
iBeacon.name = device.getName();
}
return iBeacon;
}
private static String bytesToHexString(byte[] src)
{
StringBuilder stringBuilder = new StringBuilder("");
if (src == null || src.length <= 0)
{
return null;
}
for (int i = 0; i < src.length; i++)
{
int v = src[i] & 0xFF;
String hv = Integer.toHexString(v);
if (hv.length() < 2)
{
stringBuilder.append(0);
}
stringBuilder.append(hv);
}
return stringBuilder.toString();
}
}
五、開啟藍牙
mBluetoothAdapter.enable();
六、開始掃描
mBluetoothAdapter.startLeScan(mLeScanCallback);
代碼改自鏈接地址
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持億速云。
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