我尝试了用于BLE的android示例应用, 但我无法得到所需的输出。 需要知道如何专门扫描UUID并获取设备正在传输的消息。
对于BLE发射器,我使用我的macbook作为发射器,使用MacRadius使其充当信标。
我只是想检测我的mac的uuid,然后从中获取一些信息。
需要代码示例
由于
答案 0 :(得分:0)
可以使用以下代码段从传递给scanRecord
的{{1}}参数中解析主要服务UUID:
BluetoothAdapter.LeScanCallback#onLeScan()
然后,您必须进一步解析public static List<UUID> parseServiceUuids(final byte[] advertisedData)
{
List<UUID> uuids = new ArrayList<UUID>();
if( advertisedData == null ) return uuids;
int offset = 0;
while(offset < (advertisedData.length - 2))
{
int len = advertisedData[offset++];
if(len == 0)
break;
int type = advertisedData[offset++];
switch(type)
{
case 0x02: // Partial list of 16-bit UUIDs
case 0x03: // Complete list of 16-bit UUIDs
while(len > 1)
{
int uuid16 = advertisedData[offset++];
uuid16 += (advertisedData[offset++] << 8);
len -= 2;
uuids.add(UUID.fromString(String.format("%08x-0000-1000-8000-00805f9b34fb", uuid16)));
}
break;
case 0x06:// Partial list of 128-bit UUIDs
case 0x07:// Complete list of 128-bit UUIDs
// Loop through the advertised 128-bit UUID's.
while(len >= 16)
{
try
{
// Wrap the advertised bits and order them.
ByteBuffer buffer = ByteBuffer.wrap(advertisedData, offset++, 16).order(ByteOrder.LITTLE_ENDIAN);
long mostSignificantBit = buffer.getLong();
long leastSignificantBit = buffer.getLong();
uuids.add(new UUID(leastSignificantBit, mostSignificantBit));
}
catch(IndexOutOfBoundsException e)
{
// Defensive programming.
Log.e(TAG, e.toString());
continue;
}
finally
{
// Move the offset to read the next uuid.
offset += 15;
len -= 16;
}
}
break;
default:
offset += (len - 1);
break;
}
}
return uuids;
}
以获取更多信息。