EditText to thousand digit androidX

// EditText auto format to thousand digit
// add to class
import android.content.Context;
import android.text.Editable;
import android.text.InputFilter;
import android.text.InputType;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.widget.EditText;

import java.math.BigDecimal;
import java.text.DecimalFormat;

public class RibuanEditText extends androidx.appcompat.widget.AppCompatEditText {
    private static final int MAX_LENGTH = 20;
    private static final int MAX_DECIMAL = 2;
    public RibuanEditText(Context context) {
        this(context, null);
    }
    public RibuanEditText(Context context, AttributeSet attrs) {
        this(context, attrs, androidx.appcompat.R.attr.editTextStyle);
    }
    public RibuanEditText(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }
    public void init() {
        addTextChangedListener(new RibuanTextWatcher(this));
        setInputType(InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_FLAG_DECIMAL);
        setFilters(new InputFilter[] { new InputFilter.LengthFilter(MAX_LENGTH) });
        setHint("0");
    }
    public static class RibuanTextWatcher implements TextWatcher {
        private EditText mEditText;
        RibuanTextWatcher(EditText editText) {
            mEditText = editText;
        }
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
        }
        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
        }
        @Override
        public void afterTextChanged(Editable editable) {
            String originalString = editable.toString();
            String cleanString = originalString.replaceAll("[,]", "");
            if (cleanString.isEmpty()) {
                return;
            }
            String formattedString = getFormatString(cleanString);
            mEditText.removeTextChangedListener(this);
            mEditText.setText(formattedString);
            mEditText.setSelection(mEditText.getText().length());
            mEditText.addTextChangedListener(this);
        }

        /**
         * Return the format string
         */
        private String getFormatString(String cleanString) {
            if (cleanString.contains(".")) {
                return formatDecimal(cleanString);
            } else {
                return formatInteger(cleanString);
            }
        }
        private String formatInteger(String str) {
            BigDecimal parsed = new BigDecimal(str);
            DecimalFormat formatter;
            formatter = new DecimalFormat("#,###");
            return formatter.format(parsed);
        }
        private String formatDecimal(String str) {
            if (str.equals(".")) {
                return ".";
            }
            BigDecimal parsed = new BigDecimal(str);
            DecimalFormat formatter;
            formatter =
                    new DecimalFormat("#,###." + getDecimalPattern(str)); //example patter #,###.00
            return formatter.format(parsed);
        }
        private String getDecimalPattern(String str) {
            int decimalCount = str.length() - 1 - str.indexOf(".");
            StringBuilder decimalPattern = new StringBuilder();
            for (int i = 0; i < decimalCount && i < MAX_DECIMAL; i++) {
                decimalPattern.append("0");
            }
            return decimalPattern.toString();
        }
    }
}