EditText with Currency format

Question

I have a EditText in which I want to display currency:

    input.setInputType(InputType.TYPE_CLASS_NUMBER);
    input.addTextChangedListener(new CurrencyText         


        

Answer 1

It is better to use InputFilter interface. Much easier to handle any kind of inputs by using regex. My solution for currency input format:

public class CurrencyFormatInputFilter implements InputFilter {

Pattern mPattern = Pattern.compile("(0|[1-9]+[0-9]*)?(\\.[0-9]{0,2})?");

@Override
public CharSequence filter(
        CharSequence source,
        int start,
        int end,
        Spanned dest,
        int dstart,
        int dend) {

    String result = 
            dest.subSequence(0, dstart)
            + source.toString() 
            + dest.subSequence(dend, dest.length());

    Matcher matcher = mPattern.matcher(result);

    if (!matcher.matches()) return dest.subSequence(dstart, dend);

    return null;
}
}

Valid: 0.00, 0.0, 10.00, 111.1
Invalid: 0, 0.000, 111, 10, 010.00, 01.0

How to use:

editText.setFilters(new InputFilter[] {new CurrencyFormatInputFilter()});

Answer 2

Try add this property in you xml declaration for you edit text:

android:inputType="numberDecimal" or number or signed number

See more info about android:inputType here.