How to limit decimal digits - Android

Question

I already searched online and all that I found is using DecimalFormat and I tried it, but when I code on Android Studio, appears a message saying that is necessary to use the API 24 to this kind of command. The API 24 has erros and all the sites I looked, advised to use the API 23.

So, I need a way to show double numbers only with two decimal digits on my AlertDialog.

score 4 · Accepted Answer · edited May 23 '17 at 12:19

4

referring to this SO post, you can use this code:

String formattedValue = String.format("%.2f", myDouble);

Let me know if it is what you were looking for

edited May 23 '17 at 12:19

Community

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answered Sep 15 '16 at 15:59

Pier Giorgio Misley

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I tried to use but didn't work, don't know if I used it right, I posted how I used in a comment. – Mekillerow Sep 15 '16 at 19:20
@Mekillerow String format gives you a string as result, check my edit in the code :) – Pier Giorgio Misley Sep 16 '16 at 07:32
@Mekillerow consider selecting the answer that solved your problem as the correct answer, so people having your same problem can find a solution easily – Pier Giorgio Misley Sep 19 '16 at 07:35

XxGoliathusxX · Answer 2 · 2016-09-16T00:33:00.987

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 /** Round on two digits after "." */
    public static float round(float f){
        return Math.round(f * 100) / 100.0F;
    }

P.S. Use float for short float numbers. Thats what its made for.

Edit: "Ok, with 3 decimal digits its the better too,right? How can I limit those digits?"

Take a quick look how it works for two decimal places. Then its really simple to expand for three.

edited Sep 16 '16 at 00:33

answered Sep 15 '16 at 16:39

XxGoliathusxX

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In my case use float is better than double then? – Mekillerow Sep 15 '16 at 19:23
It depends on how exact it your result shall be. If you only need two decimal digits then float is the right choice – XxGoliathusxX Sep 15 '16 at 19:27
Ok, with 3 decimal digits its the better choice too,right? How can I limit those digits? – Mekillerow Sep 16 '16 at 00:29
Difference between float and double: http://stackoverflow.com/questions/27598078/float-and-double-datatype-in-java – XxGoliathusxX Sep 16 '16 at 00:31
Understood, thanks! So in my case is better use float, but where and how should I put the code that you wrote first on my code?? PS: The code is on the comment below – Mekillerow Sep 16 '16 at 00:49

How to limit decimal digits - Android

2 Answers2