Android Studio Basit Hesap Makinesi Yapımı (Java)

Bu örnek, Android Studio Java’da basit bir hesap makinesi oluşturmak için gerekli kodları göreceksiniz. Uygulamayı adım adım yapacağız.

Adım 1: Android Studio’da yeni bir proje oluşturun, Dosya ⇒ Yeni Proje’ye gidin ve yeni bir proje oluşturmak için gerekli tüm ayrıntıları doldurun.

Adım 2: res/layout/activity_main.xml dosyasına aşağıdaki kodları ekleyin.


<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="4dp">
    <TextView
        android:id="@+id/textResult"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="70dp"
        android:background="#008080"
        android:padding="5dp"
        android:text="Code4Example"
        android:textColor="#fff"
        android:textSize="24sp"
        android:textStyle="bold" />
    <EditText
        android:id="@+id/editSayi1"
        android:inputType="number"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true" />
    <EditText
        android:id="@+id/editSayi2"
        android:inputType="number"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/editSayi1"
        android:layout_centerInParent="true" />
    <GridLayout
        android:layout_centerHorizontal="true"
        android:layout_centerInParent="true"
        android:layout_below="@+id/editSayi2"
        android:columnCount="2"
        android:rowCount="2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:layout_margin="1dp"
            android:onClick="btnTopla"
            android:text="+" />
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:layout_margin="1dp"
            android:onClick="btnCikar"
            android:text="-" />
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:layout_margin="1dp"
            android:onClick="btnCarp"
            android:text="*" />
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:layout_margin="1dp"
            android:onClick="btnBol"
            android:text="/" />
    </GridLayout>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:padding="4dp">

<TextView

android:id="@+id/textResult"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerHorizontal="true"

android:layout_marginTop="70dp"

android:background="#008080"

android:padding="5dp"

android:text="Code4Example"

android:textColor="#fff"

android:textSize="24sp"

android:textStyle="bold" />

<EditText

android:id="@+id/editSayi1"

android:inputType="number"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_centerInParent="true" />

<EditText

android:id="@+id/editSayi2"

android:inputType="number"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_below="@+id/editSayi1"

android:layout_centerInParent="true" />

<GridLayout

android:layout_centerHorizontal="true"

android:layout_centerInParent="true"

android:layout_below="@+id/editSayi2"

android:columnCount="2"

android:rowCount="2"

android:layout_width="wrap_content"

android:layout_height="wrap_content">

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerInParent="true"

android:layout_margin="1dp"

android:onClick="btnTopla"

android:text="+" />

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerInParent="true"

android:layout_margin="1dp"

android:onClick="btnCikar"

android:text="-" />

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerInParent="true"

android:layout_margin="1dp"

android:onClick="btnCarp"

android:text="*" />

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerInParent="true"

android:layout_margin="1dp"

android:onClick="btnBol"

android:text="/" />

</GridLayout>

</RelativeLayout>

Adım 3: src/MainActivity.java dosyasına aşağıdaki kodları ekleyin.


import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity {

    EditText editSayi1,editSayi2;
    TextView textSonuc;

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

        editSayi1 = findViewById(R.id.editSayi1);
        editSayi2= findViewById(R.id.editSayi2);
        textSonuc = findViewById(R.id.textResult);
    }


    public  void btnTopla(View view){
        double sayi1 = Double.parseDouble(editSayi1.getText().toString());
        double sayi2 = Double.parseDouble(editSayi2.getText().toString());
        double sonuc =  sayi1 + sayi2;
        textSonuc.setText(Double.toString(sonuc));
    }
    public  void btnCikar(View view){
        double sayi1 = Double.parseDouble(editSayi1.getText().toString());
        double sayi2 = Double.parseDouble(editSayi2.getText().toString());
        double sonuc =  sayi1 - sayi2;
        textSonuc.setText(Double.toString(sonuc));
    }
    public  void btnCarp(View view){
        double sayi1 = Double.parseDouble(editSayi1.getText().toString());
        double sayi2 = Double.parseDouble(editSayi2.getText().toString());
        double sonuc =  sayi1 * sayi2;
        textSonuc.setText(Double.toString(sonuc));
    }
    public  void btnBol(View view){
        double sayi1 = Double.parseDouble(editSayi1.getText().toString());
        double sayi2 = Double.parseDouble(editSayi2.getText().toString());
        double sonuc =  sayi1 / sayi2;
        textSonuc.setText(Double.toString(sonuc));
    }
}

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.EditText;

import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

EditText editSayi1,editSayi2;

TextView textSonuc;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

editSayi1 = findViewById(R.id.editSayi1);

editSayi2= findViewById(R.id.editSayi2);

textSonuc = findViewById(R.id.textResult);

}

public void btnTopla(View view){

double sayi1 = Double.parseDouble(editSayi1.getText().toString());

double sayi2 = Double.parseDouble(editSayi2.getText().toString());

double sonuc = sayi1 + sayi2;

textSonuc.setText(Double.toString(sonuc));

}

public void btnCikar(View view){

double sayi1 = Double.parseDouble(editSayi1.getText().toString());

double sayi2 = Double.parseDouble(editSayi2.getText().toString());

double sonuc = sayi1 - sayi2;

textSonuc.setText(Double.toString(sonuc));

}

public void btnCarp(View view){

double sayi1 = Double.parseDouble(editSayi1.getText().toString());

double sayi2 = Double.parseDouble(editSayi2.getText().toString());

double sonuc = sayi1 * sayi2;

textSonuc.setText(Double.toString(sonuc));

}

public void btnBol(View view){

double sayi1 = Double.parseDouble(editSayi1.getText().toString());

double sayi2 = Double.parseDouble(editSayi2.getText().toString());

double sonuc = sayi1 / sayi2;

textSonuc.setText(Double.toString(sonuc));

}

Ekran Çıktısı:

Android Studio Basit Hesap Makinesi Yapımı (Java)

Android Studio Basit Hesap Makinesi Yapımı (Java)

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