안드로이드 스튜디오 배수의합 구하기

 

화면단

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivitya">

        <LinearLayout
            android:layout_width="409dp"
            android:layout_height="729dp"
            android:orientation="vertical"
            tools:ignore="MissingConstraints"
            tools:layout_editor_absoluteX="1dp"
            tools:layout_editor_absoluteY="1dp">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="50dp"
                android:orientation="horizontal">

                <EditText
                    android:id="@+id/et1"
                    android:layout_width="50dp"
                    android:layout_height="wrap_content"
                    android:text="" />

                <TextView
                    android:id="@+id/tv1"
                    android:layout_width="50dp"
                    android:layout_height="wrap_content"
                    android:text="에서" />

                <EditText
                    android:id="@+id/et2"
                    android:layout_width="50dp"
                    android:layout_height="wrap_content"
                    android:text="" />

                <TextView
                    android:id="@+id/tv2"
                    android:layout_width="50dp"
                    android:layout_height="wrap_content"
                    android:text="까지" />

                <EditText
                    android:id="@+id/et3"
                    android:layout_width="50dp"
                    android:layout_height="wrap_content"
                    android:text="" />

                <Button
                    android:id="@+id/btn"
                    android:layout_width="100dp"
                    android:layout_height="wrap_content"

                    android:text="배수합" />


            </LinearLayout>

            <EditText
                android:id="@+id/et4"
                android:layout_width="50dp"
                android:layout_height="wrap_content"
                android:text="" />
        </LinearLayout>
    </androidx.constraintlayout.widget.ConstraintLayout>


</androidx.constraintlayout.widget.ConstraintLayout>

 

package kr.co.aiai.app;

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

import androidx.appcompat.app.AppCompatActivity;

public class MainActivitya extends AppCompatActivity {

    EditText et1;
    EditText et2;
    EditText et3;
    EditText et4;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maina);

        et1 = findViewById(R.id.et1);
        et2 = findViewById(R.id.et2);
        et3 = findViewById(R.id.et3);
        et4 = findViewById(R.id.et4);
        Button btn = findViewById(R.id.btn);

        btn.setOnClickListener(view -> {
            myClick();
        });

    }

    public void myClick(){
        String n1 = et1.getText().toString();
        String n2 = et2.getText().toString();
        String n3 = et3.getText().toString();

        int num1 = Integer.parseInt(n1);
        int num2 = Integer.parseInt(n2);
        int num3 = Integer.parseInt(n3);
        int sum = 0;

        for(int i = num1; i<=num2; i++){
            if(i % num3 == 0){
                sum += i;
            }
        }
        et4.setText(sum+"");
    }
}

 

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