public String unitizedDeltaString(boolean showUnit, boolean highGranularity) {
List<BgReading> last2 = BgReading.latest(2);
if (last2.size() < 2 || last2.get(0).timestamp - last2.get(1).timestamp > 20 * 60 * 1000) {
// don't show delta if there are not enough values or the values are more than 20 mintes apart
return "???";
}
double value = BgReading.currentSlope() * 5 * 60 * 1000;
if (Math.abs(value) > 100) {
// a delta > 100 will not happen with real BG values -> problematic sensor data
return "ERR";
}
// TODO: allow localization from os settings once pebble doesn't require english locale
DecimalFormat df = new DecimalFormat("#", new DecimalFormatSymbols(Locale.ENGLISH));
String delta_sign = "";
if (value > 0) {
delta_sign = "+";
}
if (doMgdl) {
if (highGranularity) {
df.setMaximumFractionDigits(1);
} else {
df.setMaximumFractionDigits(0);
}
return delta_sign + df.format(unitized(value)) + (showUnit ? " mg/dL" : "");
} else {
if (highGranularity) {
df.setMaximumFractionDigits(2);
} else {
df.setMaximumFractionDigits(1);
}
df.setMinimumFractionDigits(1);
df.setMinimumIntegerDigits(1);
return delta_sign + df.format(unitized(value)) + (showUnit ? " mmol/L" : "");
}
}
