add beacon decode util

diff --git a/app/src/main/java/com/enqualcomm/support/utils/IBeaconUtil.java b/app/src/main/java/com/enqualcomm/support/utils/IBeaconUtil.java
new file mode 100644 (file)
index 0000000..114519d
--- /dev/null
+++ b/app/src/main/java/com/enqualcomm/support/utils/IBeaconUtil.java
@@ -0,0 +1,112 @@
+package com.enqualcomm.support.utils;
+public class IBeaconUtil {
+    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;
+
+        @Override
+        public String toString() {
+            return major+","+minor+","+bluetoothAddress+","+rssi;
+        }
+    }
+    public static iBeacon fromScanData(String name,String mac, 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();
+        iBeacon.bluetoothAddress = mac;
+        iBeacon.name = name;
+
+        return iBeacon;
+    }
+
+    public 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();
+    }
+}
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