Decimal Separator Comma (',') with Numberdecimal Inputtype in Edittext

Decimal separator comma (',') with numberDecimal inputType in EditText

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
}

inputType= numberDecimal doesn't accept comma, even when using android:digits= 0123456789.,

Use android:inputType="phone". :)

Use Comma as decimal separator for android EditText with MvvmCross

That's an Android bug that is unfixed since 2009.

You have to set android:digits.

<EditText
    local:MvxBind="Text PorcentagemDesconto"
    android:inputType="number|numberDecimal"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:hint="%"
    android:digits="0123456789,-"
    android:focusableInTouchMode="true" />

If you want to deploy your app for different countries, you have to use a string resource android:digits="@string/localized_digits with

values-de/strings.xml e.g. german

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="localized_digits">0123456789,-</string>
</resources>

values/strings.xml default

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="localized_digits">0123456789.-</string>
</resources>

Or use a more generic approach and set it via code:

// extension method
public static class EditTextExtension
{
    public static void FixDigits(this EditText text)
    {
        var decimalSign = CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator;
        var digits = $"0123456789{decimalSign}-";
        text.KeyListener = DigitsKeyListener.GetInstance(digits);
    }
}

// usage
FindViewById<EditText>(Resource.Id.txtNumber).FixDigits();

Or you add thr functionality of the extension method FixDigits() to your custom EditText class.

How to Automatically add thousand separators as number is input in EditText

You can use String.format() in a TextWatcher. The comma in the format specifier does the trick.

This does not work for floating point input. And be careful not to set an infinite loop with the TextWatcher.

public void afterTextChanged(Editable view) {
    String s = null;
    try {
        // The comma in the format specifier does the trick
        s = String.format("%,d", Long.parseLong(view.toString()));
    } catch (NumberFormatException e) {
    }
    // Set s back to the view after temporarily removing the text change listener
}

Android EditText - allow only one decimal separator

Hopefully this will help someone. I needed to do this programatically.

Method 1:

editText.setKeyListener(DigitsKeyListener.getInstance(true,true));

Method 2: (method 1 didn't work for me)

First get the default decimal separator based on device locale:

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

Then in your EditText TextWatcher's afterTextChanged add:

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

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