Method filter

EditCard/src/main/java/morxander/editcard/EditCard.java:80–88

(CharSequence source, int start, int end, Spanned dest, int dstart, int dend)

        // The input filters
        InputFilter filter = new InputFilter() {
            @Override
            public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
                for (int i = start; i < end; ++i) {
                    if (!Pattern.compile("[0-9\\-]*").matcher(String.valueOf(source)).matches()) {
                        return "";
                    }
                }
                return null;
            }
        };
        // Setting the filters
        setFilters(new InputFilter[]{filter, new InputFilter.LengthFilter(19)});