How to restrict the user did not enter more than two digits after decimal point?

Question

I have edittext in listview. I want to restrict the user if they enter more than two digits after the decimal point. Now it allowing n number of numbers. How to restrict the user did not enter more than two numbers after decimal point without using pattern?

Look at http://stackoverflow.com/questions/5357455/limit-decimal-places-in-android-edittext — Mohsen Afshin, Oct 16 '12 at 07:59

score 3 · Answer 1 · edited Jul 07 '14 at 09:56

We can use a regular expression ( regex ) as follows:

public class DecimalDigitsInputFilter implements InputFilter {

    Pattern mPattern;

    public DecimalDigitsInputFilter(int digitsBeforeZero,int digitsAfterZero) {
        mPattern=Pattern.compile("[0-9]{0," + (digitsBeforeZero-1) + "}+((\\.[0-9]{0," + (digitsAfterZero-1) + "})?)||(\\.)?");
    }

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

            Matcher matcher=mPattern.matcher(dest);       
            if(!matcher.matches())
                return "";
            return null;
        }

    }

To use it do:

editText.setFilters(new InputFilter[] {new DecimalDigitsInputFilter(5,2)});

What do you mean by "how to do it?". What is your problem with this answer? — Astrorvald, Oct 16 '12 at 10:41

score 2 · Answer 2 · answered Oct 23 '17 at 12:28

2

It might be late but i am posting my solution hope it will works for someone

in Your Text Watcher Method afterTextChanged do this .

public void afterTextChanged(Editable s) {

                if(mEditText.getText().toString().contains(".")){
                    String temp[] =  mEditText.getText().toString().split("\\.");
                    if(temp.length>1) {
                        if (temp[1].length() > 3) {
                            int length = mEditText.getText().length();
                            mEditText.getText().delete(length - 1, length);
                        }
                    }
                }
    }

answered Oct 23 '17 at 12:28

Abubakar Rafi

91
13

Here in (temp[1].length() > 3) 3 is the limit of digits after "." you can replace it with your limit – Abubakar Rafi Oct 23 '17 at 12:30
that is actually pretty nice +1 But why split("\\.") why not just split(".") – Faizy_Flash Jun 04 '18 at 10:39
Java is Bad while Spliting "." thats why we use \\. to accomplish it – Abubakar Rafi Jun 05 '18 at 11:03

score 1 · Answer 3 · answered Oct 16 '12 at 07:58

1

You can use a TextWatcher and in the afterTextChanged method use a regular expression to match the required text and delete the extra numbers are they are entered.

answered Oct 16 '12 at 07:58

Ragunath Jawahar

19,513
22
110
155

How to restrict the user did not enter more than two digits after decimal point?

3 Answers3