Question

I have an EditBox in which I allow users to enter numbers. But my question is how can I restrict the user to enter not more than three-digit numbers before the decimal point and not more that one digit after decimal point eg: 22.1, 333.3, 34 but if the user try to enter 6666.777 it will not allowed them to enter.

Please help me to solve this out. If possible with an example

Answer 1

Use InputFilter to restrict user. Here is another such topic. Limit Decimal Places in Android EditText

Modify for you own. I’ve used this for my own.

private class DecimalDigitsInputFilter implements InputFilter
{

    Pattern mPattern;

    public DecimalDigitsInputFilter(int digitsBeforeZero, int digitsAfterZero)
    {
        mPattern = Pattern.compile("[0-9]{0,3}\\.[0-9]{0,1}||[0-9]{1,3}");
    }

    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;
    }

}

Now set the filter

youEditText.setFilters(new InputFilter[] {new DecimalDigitsInputFilter(3,1)});