Android – Decimal separator comma (‘,’) with numberDecimal inputType in EditText

androidandroid-edittextdecimal-point

The inputType numberDecimal in EditText uses the dot . as decimal separator. In Europe it's common to use a comma , instead. Even though my locale is set as german the decimal separator is still the .

Is there a way to get the comma as decimal separator?

Best Answer

A workaround (until Google fix this bug) is to use an EditText with android:inputType="numberDecimal" and android:digits="0123456789.,".

Then add a TextChangedListener to the EditText with the following afterTextChanged:

public void afterTextChanged(Editable s) {
    double doubleValue = 0;
    if (s != null) {
        try {
            doubleValue = Double.parseDouble(s.toString().replace(',', '.'));
        } catch (NumberFormatException e) {
            //Error
        }
    }
    //Do something with doubleValue
}

Related Solutions

Java – How to change the decimal separator of DecimalFormat from comma to dot/point

You can change the separator either by setting a locale or using the DecimalFormatSymbols.

If you want the grouping separator to be a point, you can use an european locale:

NumberFormat nf = NumberFormat.getNumberInstance(Locale.GERMAN);
DecimalFormat df = (DecimalFormat)nf;

Alternatively you can use the DecimalFormatSymbols class to change the symbols that appear in the formatted numbers produced by the format method. These symbols include the decimal separator, the grouping separator, the minus sign, and the percent sign, among others:

DecimalFormatSymbols otherSymbols = new DecimalFormatSymbols(currentLocale);
otherSymbols.setDecimalSeparator(',');
otherSymbols.setGroupingSeparator('.'); 
DecimalFormat df = new DecimalFormat(formatString, otherSymbols);

currentLocale can be obtained from Locale.getDefault() i.e.:

Locale currentLocale = Locale.getDefault();

Android – Decimal point or decimal comma in Android

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.

Best Answer

Related Solutions

Java – How to change the decimal separator of DecimalFormat from comma to dot/point

Android – Decimal point or decimal comma in Android

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