Flutter development – Calculation of how time is displayed in lists (just, x seconds ago, X minutes ago, X hours ago, X days ago)

The calculation rules are below, just need to pass in the creation of the timestamp can return the desired content, not explained ha, everyone to see the code, not complex:

/// Evaluate the time rule, the 11-bit timestamp is passed in
String getCommentTime(int createAt) {
  // get the timestamp of the current time ~ / is a double, with a decimal point
  var cTimestamp = DateTime.now().millisecondsSinceEpoch;
  var allStamp = cTimestamp - createAt;
  int day = (cTimestamp - createAt) ~/ (1000 * 60 * 60 * 24);
  int hour = (cTimestamp - createAt) % (1000 * 60 * 60 * 24) ~ / (1000 * 60 * 60);
  int minute = (cTimestamp - createAt) % (1000 * 60 * 60 * 24) % (1000 * 60 * 60) ~ / (1000 * 60);
  int second = (cTimestamp - createAt) % (1000 * 60 * 60 * 24) % (1000 * 60 * 60) % (1000 * 60) ~ /1000;
  if (day == 0 && hour == 0 && minute == 0 && second < 60) {
    return 'just';
  } else if (day == 0 && hour == 0 && minute < 60) {
    // You can also use toString ()
    return '${minute.tostring ()} minutes ago ';
  } else if (day == 0 && hour < 24 && hour > 0) {
    return '${hour.toString()} hour ago ';
  } else if (day > 0 && day < 7) {
    return '${day. The toString ()} days ago';
  } else {
    DateTime date = DateTime.fromMillisecondsSinceEpoch(createAt);
    return date.toLocal().toString().substring(0.19); }}Copy the code

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