Get human-readable time in nanoseconds
I am trying to implement an ETA feature. UsingSystem.nanoTime()
startTime = System.nanoTime()
Long elapsedTime = System.nanoTime() - startTime;
Long allTimeForDownloading = (elapsedTime * allBytes / downloadedBytes);
Long remainingTime = allTimeForDownloading - elapsedTime;
But I can't figure out how to get the nanosecond humanoid shape; For example: 1d 1h
, 36s
and 3m 50s
.
How can i do this?
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If remainingTime
is in nanoseconds , just do the math and add the values to StringBuilder
:
long remainingTime = 5023023402000L;
StringBuilder sb = new StringBuilder();
long seconds = remainingTime / 1000000000;
long days = seconds / (3600 * 24);
append(sb, days, "d");
seconds -= (days * 3600 * 24);
long hours = seconds / 3600;
append(sb, hours, "h");
seconds -= (hours * 3600);
long minutes = seconds / 60;
append(sb, minutes, "m");
seconds -= (minutes * 60);
append(sb, seconds, "s");
long nanos = remainingTime % 1000000000;
append(sb, nanos, "ns");
System.out.println(sb.toString());
// auxiliary method
public void append(StringBuilder sb, long value, String text) {
if (value > 0) {
if (sb.length() > 0) {
sb.append(" ");
}
sb.append(value).append(text);
}
}
Output for above:
1h 23m 43s 23402000ns
(1 hour, 23 minutes, 43 seconds and 23402000 nanoseconds).
This is my old code, you can convert it in days too.
private String calculateDifference(long timeInMillis) {
String hr = "";
String mn = "";
long seconds = (int) ((timeInMillis) % 60);
long minutes = (int) ((timeInMillis / (60)) % 60);
long hours = (int) ((timeInMillis / (60 * 60)) % 24);
if (hours < 10) {
hr = "0" + hours;
}
if (minutes < 10) {
mn = "0" + minutes;
}
textView.setText(Html.fromHtml("<i><small;text-align: justify;><font color=\"#000\">" + "Total shift time: " + "</font></small; text-align: justify;></i>" + "<font color=\"#47a842\">" + hr + "h " + mn + "m " + seconds + "s" + "</font>"));
return hours + ":" + minutes + ":" + seconds;
}
}
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I would say both of these answers are correct, but either way, here's a slightly shorter version of the function that takes nano-time and returns a human-readable string.
private String getReadableTime(Long nanos){
long tempSec = nanos/(1000*1000*1000);
long sec = tempSec % 60;
long min = (tempSec /60) % 60;
long hour = (tempSec /(60*60)) % 24;
long day = (tempSec / (24*60*60)) % 24;
return String.format("%dd %dh %dm %ds", day,hour,min,sec);
}
For maximum precision, you can use float division and round instead of integer division.
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