안드로이드 프로그래밍 테이블레이아웃계산기 (안드로이드 예제)

main.java

package com.cookandroid.layout;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import org.w3c.dom.Text;

public class MainActivity extends AppCompatActivity {

    EditText edit1,edit2;
    Button btnadd,btnmin,btnmul,btndiv;
    TextView tv1;
    String num1,num2;
    Integer result;
    Button[] numButton = new Button[10];
    Integer[] numBtnids = {R.id.btn0,R.id.btn1,R.id.btn2,R.id.btn3,R.id.btn4,R.id.btn5,
            R.id.btn6,R.id.btn7,R.id.btn8,R.id.btn9};
    int i;


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

        setTitle("테이블레이아웃 계산기");

        edit1 = (EditText) findViewById(R.id.Edit1);
        edit2 = (EditText) findViewById(R.id.Edit2);

        btnadd = (Button) findViewById(R.id.btnadd);
        btnmin = (Button) findViewById(R.id.btnmin);
        btnmul = (Button) findViewById(R.id.btnmul);
        btndiv = (Button) findViewById(R.id.btndiv);

        tv1 = (TextView) findViewById(R.id.TextResult);

        btnadd.setOnTouchListener(new View.OnTouchListener(){
                public boolean onTouch(View arg0, MotionEvent arg1)
                {
                    num1= edit1.getText().toString();
                    num2= edit2.getText().toString();
                    result = Integer.parseInt(num1) + Integer.parseInt(num2);
                    tv1.setText("계산결과 : "+result.toString());
                    return false;
                }
        });

        btnmin.setOnTouchListener(new View.OnTouchListener(){
            public boolean onTouch(View arg0, MotionEvent arg1)
            {
                num1= edit1.getText().toString();
                num2= edit2.getText().toString();
                result = Integer.parseInt(num1) - Integer.parseInt(num2);
                tv1.setText("계산결과 : "+result.toString());
                return false;
            }
        });

        btnmul.setOnTouchListener(new View.OnTouchListener(){
            public boolean onTouch(View arg0, MotionEvent arg1)
            {
                num1= edit1.getText().toString();
                num2= edit2.getText().toString();
                result = Integer.parseInt(num1) * Integer.parseInt(num2);
                tv1.setText("계산결과 : "+result.toString());
                return false;
            }
        });

        btndiv.setOnTouchListener(new View.OnTouchListener(){
            public boolean onTouch(View arg0, MotionEvent arg1)
            {
                num1= edit1.getText().toString();
                num2= edit2.getText().toString();
                result = Integer.parseInt(num1) / Integer.parseInt(num2);
                tv1.setText("계산결과 : "+result.toString());
                return false;
            }
        });

        for(i=0;i<numBtnids.length;i++)
        {
            numButton[i] = (Button) findViewById(numBtnids[i]);
        }

        for(i = 0; i<numBtnids.length;i++) {
            final int index;
            index = i;


            numButton[index].setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {

                    if (edit1.isFocused() == true) {
                        num1 = edit1.getText().toString()
                                + numButton[index].getText().toString();
                        edit1.setText(num1);
                    } else if (edit2.isFocused() == true) {
                        num2 = edit2.getText().toString()
                                + numButton[index].getText().toString();
                        edit2.setText(num2);
                    } else
                        Toast.makeText(getApplicationContext(), "먼저 에디트텍스트를 선택하세요", Toast.LENGTH_SHORT).show();

                }
            });

        }
    }
}

main.xml

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

    <TableRow>
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/Edit1"
            android:layout_span="5"
            android:hint="숫자1 입력"/>
    </TableRow>

    <TableRow>
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/Edit2"
            android:layout_span="5"
            android:hint="숫자2 입력"/>
    </TableRow>

    <TableRow>
       <Button
           android:id="@+id/btn0"
           android:text="0"/>
        <Button
            android:id="@+id/btn1"
            android:text="1"/>
        <Button
            android:id="@+id/btn2"
            android:text="2"/>
        <Button
            android:id="@+id/btn3"
            android:text="3"/>
        <Button
            android:id="@+id/btn4"
            android:text="4"/>
    </TableRow>

    <TableRow>
        <Button
            android:id="@+id/btn5"
            android:text="5"/>
        <Button
            android:id="@+id/btn6"
            android:text="6"/>
        <Button
            android:id="@+id/btn7"
            android:text="7"/>
        <Button
            android:id="@+id/btn8"
            android:text="8"/>
        <Button
            android:id="@+id/btn9"
            android:text="9"/>
    </TableRow>

    <TableRow>
        <Button
            android:id="@+id/btnadd"
            android:layout_margin="5dp"
            android:layout_span="5"
            android:text="더하기"/>

    </TableRow>

    <TableRow>
        <Button
            android:id="@+id/btnmin"
            android:layout_margin="5dp"
            android:layout_span="5"
            android:text="빼기"/>

    </TableRow>

    <TableRow>
        <Button
            android:id="@+id/btnmul"
            android:layout_margin="5dp"
            android:layout_span="5"
            android:text="곱하기"/>

    </TableRow>

    <TableRow>
        <Button
            android:id="@+id/btndiv"
            android:layout_margin="5dp"
            android:layout_span="5"
            android:text="나누기"/>

    </TableRow>

    <TableRow>

        <TextView
            android:id="@+id/TextResult"
            android:layout_margin="5dp"
            android:layout_span="5"
            android:text="계산결과: "
            android:textColor="#FF0000"/>

    </TableRow>





</TableLayout>

테이블레이아웃계산기