Change DecimalFormat locale

问题

I have custom DecimalFormat in Edittext's addTextChangedListener method, everything is working perfectly but when I change language (locale) my addTextChangedListener is not working.

double answer = inputDouble * counterToDouble;
DecimalFormat df = new DecimalFormat("##.########");
// df=(DecimalFormat)numberFormat;

df.setRoundingMode(RoundingMode.DOWN);
answer = Double.parseDouble(df.format(answer));

unicoinsAmmount.setText(String.valueOf(df.format(answer)));

I searched about my problem and found a NumberFormat solution:

NumberFormat numberFormat = NumberFormat.getNumberInstance(Locale.US);

but I don't know how I can use this code.

回答1:

You may try by first converting to NumberFormat and then Cast it to DecimalFormat

Integer vc = 3210000;
NumberFormat nf = NumberFormat.getNumberInstance(Locale.US);
DecimalFormat formatter = (DecimalFormat) nf;
formatter.applyPattern("#,###,###");
String fString = formatter.format(vc);
return convertNumbersToEnglish(fString);

回答2:

You can also specify locale for DecimalFormat this way:

DecimalFormatSymbols symbols = new DecimalFormatSymbols(Locale.US);
DecimalFormat format = new DecimalFormat("##.########", symbols);

回答3:

You can use basic constructor for setting Locale while creating DecimalFormat object:

DecimalFormat dFormat = new DecimalFormat("#.#", new DecimalFormatSymbols(Locale.US));

回答4:

Use simply this method to convert current localization wise number,

public static String currencyFormatter(String balance) {
    try {
        double amount = Double.parseDouble(balance);
        DecimalFormat decimalFormat = new DecimalFormat("##,##,##,###.##");
        DecimalFormat locationSpecificDF = null;
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
            locationSpecificDF = (DecimalFormat) DecimalFormat.getNumberInstance(Locale.forLanguageTag("bn")); // Ex. en, bn etc.
        } else {
            return decimalFormat.format(amount);
        }
        return locationSpecificDF.format(amount);
    } catch (Exception e) {
        return balance;
    }
}

or follow this link.

回答5:

if you want to use only NumberFormat, you can do this way:

unicoinsAmmount.setText(NumberFormat.getNumberInstance(Locale.US).format(vc));

来源：https://stackoverflow.com/questions/36418901/change-decimalformat-locale