Android - Broadcast as iBeacon - 原生

broadcast_as_ibeacon.txt

    private void startAdvertise(String uuid, int major, int minor) {
        BluetoothLeAdvertiser advertiser = BluetoothAdapter.getDefaultAdapter().getBluetoothLeAdvertiser();
        AdvertiseSettings settings=createAdvertiseSettings(1000);
        AdvertiseData data = createAdvertiseData( uuid ,  major, minor, -59);
        //
        advertiser.startAdvertising(settings, data, new AdvertiseCallback() {
            @Override
            public void onStartSuccess(AdvertiseSettings settingsInEffect) {
                super.onStartSuccess(settingsInEffect);
            }

            @Override
            public void onStartFailure(int errorCode) {
                super.onStartFailure(errorCode);
            }
        });
    }
    
    //---------------------------------------------------------------------------------

    public AdvertiseSettings createAdvertiseSettings(  int timeoutMillis) {
        AdvertiseSettings.Builder builder = new AdvertiseSettings.Builder();
        builder.setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_LOW_LATENCY);
        builder.setConnectable(true);
        builder.setTimeout(timeoutMillis);
        builder.setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_HIGH);
        return builder.build();
    }


    public AdvertiseData createAdvertiseData(String uuidString, int major,
                                             int minor, int txPower) {
        AdvertiseData.Builder mDataBuilder = new AdvertiseData.Builder();
        String beaconType = "0215"; 
        String uuid = uuidString.replace("-", "");
        String majorStr = formatStringLenth(4, Integer.toHexString(major), '0');
        String minorStr = formatStringLenth(4, Integer.toHexString(minor), '0');
        String measuredPower = formatStringLenth(2, Integer.toHexString(-59), '0');
	//
        String dataStr = beaconType + uuid + majorStr + minorStr + measuredPower;
	//
        byte[] data = hexStringToBytes(dataStr);
        mDataBuilder.addManufacturerData(0x004C, data);
        AdvertiseData mAdvertiseData = mDataBuilder.build();
        return mAdvertiseData;
    }
    
    //---------------------------------------------------------------------------------

   /**
     *
     * @param targetLenth 補齊後的長度
     * @param src 需要補齊的字串
     * @param leftCharacter 用來補齊長度的字元
     * @return 補齊字串
     */
    public static String formatStringLenth(int targetLenth, String src, char leftCharacter) {

        if(src.length()>targetLenth){
            return src.substring(src.length()-targetLenth);
        }else{

            int delta=targetLenth-src.length();
            for (int i = 0; i <delta ; i++) {
                src=leftCharacter+src;
            }
            return src;
        }
    }

    /**
     * 十六進制字串 轉 字元陣列
     * @param hexString "A0B102"
     * @return new byte[]{(byte) 0xA0,(byte) 0xB1,2}
     */
    public static byte[] hexStringToBytes(String hexString) {
        if (hexString == null || hexString.equals("")) {
            return null;
        }
        if(hexString.length()%2!=0){
            hexString="0"+hexString;
        }
        hexString = hexString.toUpperCase();
        int length = hexString.length() / 2;
        char[] hexChars = hexString.toCharArray();
        byte[] d = new byte[length];
        for (int i = 0; i < length; i++) {
            int pos = i * 2;
            d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
        }
        return d;
    }