[안드로이드 스튜디오] 1~100까지 랜덤게임 맞추기

XML 코드

<?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">


    <EditText
        android:id="@+id/editTextText"
        android:layout_width="257dp"
        android:layout_height="52dp"
        android:layout_marginStart="68dp"
        android:layout_marginEnd="68dp"
        android:layout_marginBottom="43dp"
        android:ems="10"
        android:inputType="phone"
        android:text=""
        app:layout_constraintBottom_toTopOf="@+id/textView1"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/imageView3" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="185dp"
        android:layout_height="30dp"
        android:layout_marginBottom="20dp"
        android:text="1-100까지 숫자입력하세요"
        android:textAlignment="center"
        app:layout_constraintBottom_toTopOf="@+id/button"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editTextText" />

    <Button
        android:id="@+id/button"
        android:layout_width="88dp"
        android:layout_height="40dp"
        android:layout_marginBottom="29dp"
        android:backgroundTint="#673AB7"
        android:onClick="playrandomnumber"
        android:text="GUESS"
        app:layout_constraintBottom_toTopOf="@+id/textView2"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView1" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="282dp"
        android:layout_height="49dp"
        android:layout_marginBottom="74dp"
        android:singleLine="true"
        android:text="여기는 랜덤한 숫자가 보입니다."
        android:textAlignment="center"
        android:textSize="20dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/button" />

    <ImageView
        android:id="@+id/imageView3"
        android:layout_width="395dp"
        android:layout_height="343dp"
        android:layout_marginBottom="323dp"
        app:layout_constraintBottom_toTopOf="@+id/textView3"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/logo" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="103dp"
        android:layout_height="48dp"
        android:layout_marginBottom="16dp"
        android:text="2201031 박민욱"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/imageView3" />


</androidx.constraintlayout.widget.ConstraintLayout>

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JAVA 코드

package com.example.up_and_down;

import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

import java.util.Random;

public class MainActivity extends AppCompatActivity {
    EditText et;
    TextView tv1, tv2;
    int rn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        et = findViewById(R.id.editTextText);
        tv1 = findViewById(R.id.textView1);
        tv2 = findViewById(R.id.textView2);
        rn = new Random().nextInt(100)+1;
    }

    public void playrandomnumber(View v){
        tv2.setText("생성된 숫자 : " + rn);
        String str = et.getText().toString();
        int user = Integer.parseInt(str);

        if(user > rn) {
            tv1.setText(user + "보다 작습니다.");
        } else if (user < rn) {
            tv1.setText(user + "보다 큽니다.");
        } else {
            tv1.setText("정답입니다!");
        }
        et.setText("");
    }

}

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