Decimal point or decimal comma in Android

Question

Is there an easy way to read back if the language set uses a decimal comma or a decimal point?

Answer 1

Not sure if there is an easy way, but you could test which language set is being used and then make the appropriate changes according to if that language used commas or decimals.

Answer 2

I did try this and it worked fine...

    String osVersion = System.getProperty("os.version");
String PhoneModel = android.os.Build.MODEL;
String locale = this.getResources().getConfiguration().locale.getDisplayCountry();
char decSeparator = '*';
DecimalFormatSymbols dfs = new DecimalFormatSymbols();
decSeparator = dfs.getDecimalSeparator();
String androidVersion = android.os.Build.VERSION.RELEASE;
String prologue = String.format("OS verson = %s PhoneModel = %s locale = %s DecimalFormatSymbol = [%c] androidVersion = %s ", 
        osVersion ,PhoneModel, locale, decSeparator,androidVersion);

Answer 3

you can use:

Currency currency = Currency.getInstance(device_locale);

than use currency.getSymbol() for symbol. For default device locale you can use:

@TargetApi(Build.VERSION_CODES.N)
    public static Locale getCurrentLocale(Context c) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            return c.getResources().getConfiguration().getLocales().get(0);
        } else {
            //noinspection deprecation
            return c.getResources().getConfiguration().locale;
        }
    }

Answer 4

Or why not

DecimalFormatSymbols.getInstance().decimalSeparator

Answer 5

EDIT: Updating based on @Algar's suggestion; you can directly use:

char separatorChar = DecimalFormatSymbols.getInstance().getDecimalSeparator();

As it will always return an instance of DecimalFormatSymbols.

---

NumberFormat nf = NumberFormat.getInstance();
if (nf instanceof DecimalFormat) {
    DecimalFormatSymbols sym = ((DecimalFormat) nf).getDecimalFormatSymbols();
    char decSeparator = sym.getDecimalSeparator();
}

Docs:

NumberFormat, DecimalFormat, DecimalFormatSymbols

According to the DecimalFormat docs, apparently calling NumberFormat.getInstance() is safe, but may return a subclass other than DecimalFormat (the other option I see is ChoiceFormat). I believe for the majority of instances it should be a DecimalFormat, and then you can compare decSeparator against a , and . to see which format it is using.