Is Hour between an hour range?

Question

The closest post I found on my question is How to compare current time with time range? But this doesn't work for me because i need to know if the current time on the users device is between a time range

so i got the current time like this...

DateFormat dateFormat = new SimpleDateFormat("yyyy-mm-dd hh:mm:ss a");
    String horaString = dateFormat.format(hour);
    Log.i("ALO","HORAAAAAASSSSTRRRRIIIINNNNGGG---->"+horaString);

    first = horaString.charAt(11);
    Log.i("ALOP","Char at 11 ---->"+first);
    char second=horaString.charAt(12);
    Log.i("ALOP","Char at 12 ---->"+second);
    char third=horaString.charAt(13);
    char fourth=horaString.charAt(14);
    char fith=horaString.charAt(15);


    StringBuilder sb = new StringBuilder();
    sb.append(first);
    sb.append(second);
    sb.append(third);
    sb.append(fourth);
    sb.append(fith);

    String currentTime = sb.toString();

now what is need to do is

6:00>=currentTime<=8:30 //Can i still do the comparison with AM/PM?

So this is what I need to do if currentTime = 8:29 a method that lets me know is True with a boolean.

Exactly how is this different from the question you are linking to? — Ole V.V., Jun 02 '19 at 17:58
It is different because i need to know if the current time is >= or <= . — Felipe Franco, Jun 02 '19 at 18:02
And you expect the device clock to be accurate enough to determine that? Anyway, thanks for the clarifying answer. — Ole V.V., Jun 02 '19 at 18:40

score 1 · Answer 1 · answered Jun 02 '19 at 18:54

java.time and ThreeTenABP

    final LocalTime rangeBegin = LocalTime.of(6, 0);
    final LocalTime rangeEnd = LocalTime.of(8, 30);

    LocalTime currentTime = LocalTime.now(ZoneId.of("America/Bogota"));

    boolean inClosedRange = ! (currentTime.isBefore(rangeBegin) || currentTime.isAfter(rangeEnd));

If you prefer to trust the device time zone setting rather than a hard-coded (or configured) time zone, use LocalTime.now(ZoneId.systemDefault()).

Since LocalTime hasn’t got an isBeforeOrEqual method nor an isEqualOrAfter, I am putting the condition negatively: if the current time is neither strictly before nor strictly after the range, it must be within it. Some will prefer the longer but also more direct:

    boolean inClosedRange = currentTime.equals(rangeBegin)
            || (currentTime.isAfter(rangeBegin) && currentTime.isBefore(rangeEnd))
            || currentTime.equals(rangeEnd);

You will notice how much simpler it still is than your code using SimpleDateFormat and Date. I personally also find it clearer. I am using and recommending java.time, the modern Java date and time API.

Question: Can I use java.time on Android?

Yes, java.time works nicely on older and newer Android devices. It just requires at least Java 6.

In Java 8 and later and on newer Android devices (from API level 26) the modern API comes built-in.
In Java 6 and 7 get the ThreeTen Backport, the backport of the modern classes (ThreeTen for JSR 310; see the links at the bottom).
On (older) Android use the Android edition of ThreeTen Backport. It’s called ThreeTenABP. And make sure you import the date and time classes from org.threeten.bp with subpackages.

Links

Oracle tutorial: Date Time explaining how to use java.time.
Java Specification Request (JSR) 310, where java.time was first described.
ThreeTen Backport project, the backport of java.time to Java 6 and 7 (ThreeTen for JSR-310).
ThreeTenABP, Android edition of ThreeTen Backport
Question: How to use ThreeTenABP in Android Project, with a very thorough explanation.

thanks great responce one i check if it works i will check on your answer cool responce — Felipe Franco, Jun 06 '19 at 00:09

score 0 · Answer 2 · answered Jun 02 '19 at 15:15

0

There are two useful command: After, Before. Here is an example how you can use them:

SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm");

Date fromTime = dateFormat.parse("6:00");
Date toTime = dateFormat.parse("8:30");
Date currentTime = dateFormat.parse(dateFormat.format(new Date()));

if(currentTime.after(fromTime) && currentTime.before(toTime)) {
    // To do
}

answered Jun 02 '19 at 15:15

Dmytro Ivanov

1,260
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Thank you Dmitro for your quick responce. I have a question though does this before or after method will take when is = also , for example when is 8:30. – Felipe Franco Jun 02 '19 at 15:37
1

@FelipeFranco Nope. Add some case to check if currentTime equals to toTime variable. – Dmytro Ivanov Jun 02 '19 at 15:46

Is Hour between an hour range?

2 Answers2

java.time and ThreeTenABP

Question: Can I use java.time on Android?

Links