Alternative to DecimalFormat in Android

Question

I'm trying to make a method that receives a double and returns a String formatted with always 2 numbers after the decimal point.

For example:

1990.999 -> "1990.99"

1990.9 -> "1990.90"

I'm developing an app using Android min sdk version 21, so I can't use DecimalFormat. I manage to make something that works like this:

public String currencyFormat(double value) {
        return value < 0
                ? String.format("-" + currencySymbol + "%.02f", value * -1)
                : String.format(currencySymbol + "%.02f", value);
    }

However, the problem here is that if I try for example 1999,369 the result is "1999,37". Is there a way to prevent the round out?

what if you have an int `99` without any point? should be `99.00` or what? — Youcef LAIDANI, Mar 27 '17 at 19:29

Gooz · Accepted Answer · 2017-03-27T19:25:04.087

1

You could use this method instead:

public static String currencyFormat(double value) {
    value = Math.floor(value * 100) / 100; // rounds 'value' to 2 decimal places
    return String.format("%.2f", value); // converts 'value' to string
}

edited Mar 27 '17 at 19:25

answered Mar 27 '17 at 19:09

Gooz

1,106
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20

It still round out the value. – Jose Gonzalez Mar 27 '17 at 19:12
@JoseGonzalez, ah yes, forgot about that. You can still format the double to three decimals places though, and cut the last one off. – Gooz Mar 27 '17 at 19:13
It's a good idea, but if the number is for example, 1990,349999 the result would be 1990,35 instead of 34. – Jose Gonzalez Mar 27 '17 at 19:22
@JoseGonzalez, indeed. I see. Maybe this time my answer is correct? :) – Gooz Mar 27 '17 at 19:25

Alternative to DecimalFormat in Android

1 Answers1