Create an app that find Automorphic, Armstrong, Disarium Number

ArmstrongNo.java

package com.bca.tca1901074;

import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class ArmstrongNo extends AppCompatActivity {

    EditText inputNo;
    Button submitButton;
    TextView resultText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_armstrong_no);

        inputNo = findViewById(R.id.inputNumber);
        submitButton = findViewById(R.id.submit_button);
        resultText = findViewById(R.id.text);

        submitButton.setOnClickListener(view -> {
            int num = Integer.parseInt(inputNo.getText().toString());
            int r, sum = 0, temp;
            temp = num;
            while (num > 0) {
                r = num % 10;
                sum = sum + (r * r * r);
                num = num / 10;
            }

            if(temp == sum){
                resultText.setText("Result: Yes");
            }else{
                resultText.setText("Result: No");
            }
        });
    }
}