package com.example.app_10p5;
  
  import android.text.InputFilter;
  import android.text.Spanned;
  
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /**
   * Created by beaus on 02/05/2016.
   */
  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;
      }
  
  }