README.md

AutoFormatInputWatcher

This repository contains an exampe project with input watcher for auto formatting digits in edit text.

It's fast and simpe in use, supports fast delete and insert. Enjoy using it.

Demo with comma:

Demo with space:

How to use it:

    EditText input = findViewById(R.id.input);

    NumberAutoFormatWatcher numberAutoFormatWatcher = new NumberAutoFormatWatcher();
    numberAutoFormatWatcher.setFilter(filter);
    numberAutoFormatWatcher.setDecimalFractions(2); // set decimal fractions
    numberAutoFormatWatcher.setIntegerFractions(9); // set integer fractions

    input.setFilters(new InputFilter[] { filter });
    input.addTextChangedListener(numberAutoFormatWatcher);
    
    InputFilter filter = new InputFilter() {
    @Override
    public CharSequence filter(CharSequence source, int i, int i1, Spanned spanned, int i2,
        int i3) {

      String fullString = input.getText().toString() + source.toString();

      int dotAmount = InputUtils.getSignCount(fullString, '.');

      // preventing multiple dots

      if (dotAmount > 1) {
        return "";
      }

      return source;
    }
  };

  <EditText
      android:id="@+id/input"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:inputType="numberDecimal"
      android:singleLine="true"
      />

What's new:

-prevent symbols entering (while paste)
-fixed crash (while paste symbols)
-set limit for integer fractions
-set limit for decimal fractions