App Part 4

package com.example.cris.zeiterfassungv2;

import android.text.Editable;
import android.text.TextWatcher;
import android.widget.EditText;



public class Sum implements TextWatcher {
        MainActivity ze;

    public Sum (MainActivity Zeiterfassung) {
        ze = Zeiterfassung;
    }

        @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) {
        EditText txt3 = (EditText) ze.lastRow.getChildAt(3);
        EditText txt4 = (EditText) ze.lastRow.getChildAt(4);
        EditText txt5 = (EditText) ze.lastRow.getChildAt(5);



        if(!txt3.getText().toString().equals("") && !txt4.getText().toString().equals("") && txt5.getText().toString().equals(""))
        {
            String n1 = txt3.getText().toString();
            int n11 = Integer.parseInt(n1);

            String n2 = txt4.getText().toString();
            int n22 = Integer.parseInt(n2);


            txt5.setText(String.valueOf(n22 - n11));


        }
    }}