Decimal separator comma (',') with numberD

Question

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?

Answer 1

For Mono(Droid) solutions:

decimal decimalValue = decimal.Parse(input.Text.Replace(",", ".") , CultureInfo.InvariantCulture);

Answer 2

I think this solution is less complex than the others written here:

<EditText
    android:inputType="numberDecimal"
    android:digits="0123456789," />

This way when you press the '.' in the soft keyboard nothing happens; only numbers and comma are allowed.

Answer 3

you could use the following for different locales

private void localeDecimalInput(final EditText editText){

    DecimalFormat decFormat = (DecimalFormat) DecimalFormat.getInstance(Locale.getDefault());
    DecimalFormatSymbols symbols=decFormat.getDecimalFormatSymbols();
    final String defaultSeperator=Character.toString(symbols.getDecimalSeparator());

    editText.addTextChangedListener(new TextWatcher() {

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void afterTextChanged(Editable editable) {
            if(editable.toString().contains(defaultSeperator))
                editText.setKeyListener(DigitsKeyListener.getInstance("0123456789"));
            else
                editText.setKeyListener(DigitsKeyListener.getInstance("0123456789" + defaultSeperator));
        }
    });
}

Answer 4

to get localize your input use:

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

and then add:

textEdit.setKeyListener(DigitsKeyListener.getInstance("0123456789" + sep));

than don't forget to replace "," with "." so Float or Double can parse it without errors.

Answer 5

IMHO the best approach for this problem is to just use the InputFilter. A nice gist is here DecimalDigitsInputFilter. Then you can just:

editText.setInputType(TYPE_NUMBER_FLAG_DECIMAL | TYPE_NUMBER_FLAG_SIGNED | TYPE_CLASS_NUMBER)
editText.setKeyListener(DigitsKeyListener.getInstance("0123456789,.-"))
editText.setFilters(new InputFilter[] {new DecimalDigitsInputFilter(5,2)});

Answer 6

I decided to change comma to dot only while editing. Here is my tricky and relative simple workaround:

    editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
        @Override
        public void onFocusChange(View v, boolean hasFocus) {
            EditText editText = (EditText) v; 
            String text = editText.getText().toString();
            if (hasFocus) {
                editText.setText(text.replace(",", "."));
            } else {
                if (!text.isEmpty()) {
                    Double doubleValue = Double.valueOf(text.replace(",", "."));
                    editText.setText(someDecimalFormatter.format(doubleValue));
                }
            }
        }
    });

someDecimalFormatter will use comma or dot depends on Locale