private void handleActivityMetadata(byte[] value) {
if (value.length != activityMetadataLength) {
return;
}
// byte 0 is the data type: 1 means that each minute is represented by a triplet of bytes
int dataType = value[0];
// byte 1 to 6 represent a timestamp
GregorianCalendar timestamp = MiBandDateConverter.rawBytesToCalendar(value, 1);
// counter of all data held by the band
int totalDataToRead = (value[7] & 0xff) | ((value[8] & 0xff) << 8);
totalDataToRead *= (dataType == MiBandService.MODE_REGULAR_DATA_LEN_MINUTE) ? 3 : 1;
// counter of this data block
int dataUntilNextHeader = (value[9] & 0xff) | ((value[10] & 0xff) << 8);
dataUntilNextHeader *= (dataType == MiBandService.MODE_REGULAR_DATA_LEN_MINUTE) ? 3 : 1;
// there is a total of totalDataToRead that will come in chunks (3 bytes per minute if dataType
// == 1 (MiBandService.MODE_REGULAR_DATA_LEN_MINUTE)),
// these chunks are usually 20 bytes long and grouped in blocks
// after dataUntilNextHeader bytes we will get a new packet of 11 bytes that should be parsed
// as we just did
if (activityStruct.isFirstChunk() && dataUntilNextHeader != 0) {
GB.toast(
getContext()
.getString(
R.string.user_feedback_miband_activity_data_transfer,
DateTimeUtils.formatDurationHoursMinutes((totalDataToRead / 3), TimeUnit.MINUTES),
DateFormat.getDateTimeInstance().format(timestamp.getTime())),
Toast.LENGTH_LONG,
GB.INFO);
}
LOG.info(
"total data to read: " + totalDataToRead + " len: " + (totalDataToRead / 3) + " minute(s)");
LOG.info(
"data to read until next header: "
+ dataUntilNextHeader
+ " len: "
+ (dataUntilNextHeader / 3)
+ " minute(s)");
LOG.info(
"TIMESTAMP: "
+ DateFormat.getDateTimeInstance().format(timestamp.getTime())
+ " magic byte: "
+ dataUntilNextHeader);
activityStruct.startNewBlock(timestamp, dataUntilNextHeader);
}
