/**
* encodes the heartRateTrace to binary format (byte-array)
*
* @param trace the given trace (as list) to get the byteArray from
* @return a byteArray representing the heartRateTrace
*/
public static byte[] encodeHeartRateTrace(List<HeartRateData> trace) {
if (trace == null || trace.size() == 0) {
return new byte[0];
}
DataOutputStream os = null;
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
os = new DataOutputStream(bos);
os.writeInt(trace.size());
for (HeartRateData data : trace) {
os.writeLong(data.getRuntime());
os.writeByte(data.getHeartRate());
}
return bos.toByteArray();
} catch (Exception e) {
Log.e(TAG, "Can't encode heart rate trace: ", e);
return new byte[0];
}
}
