[실시간 운영체제] 환율 계산기

환율을 계산해주는 코드입니다.

단점으로는 변하는 환율값을 실시간으로 반영해주지 못하고 수기로 직접 변경해주어야한다는 치명정인 단점을 가지고 있습니다.

 

 

package com.example.currency_converter;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity {

    private EditText myText;
    private TextView notice;

    private RadioGroup RB_group_from, RB_group_to;
    private RadioButton RB_from_won, RB_from_dollar, RB_from_euro, RB_from_yen;
    private RadioButton RB_to_won, RB_to_dollar, RB_to_euro, RB_to_yen;



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

        myText = (EditText) findViewById(R.id.myText);
        notice = (TextView) findViewById(R.id.notice_design);

        RB_group_from = (RadioGroup) findViewById(R.id.rb_group_from);
        RB_group_to = (RadioGroup) findViewById(R.id.rb_group_to);

        RB_from_won = (RadioButton) findViewById(R.id.rb_from_wons);
        RB_from_dollar = (RadioButton) findViewById(R.id.rb_from_dollar);
        RB_from_euro = (RadioButton) findViewById(R.id.rb_from_euro);
        RB_from_yen = (RadioButton) findViewById(R.id.rb_from_yen);

        RB_to_won = (RadioButton) findViewById(R.id.rb_to_won);
        RB_to_dollar = (RadioButton) findViewById(R.id.rb_to_dollar);
        RB_to_euro = (RadioButton) findViewById(R.id.rb_to_euro);
        RB_to_yen = (RadioButton) findViewById(R.id.rb_to_yen);
    }

    public void click_0 (View view){myText.setText(myText.getText()+"0");}
    public void click_1 (View view){myText.setText(myText.getText()+"1");}
    public void click_2 (View view){myText.setText(myText.getText()+"2");}
    public void click_3 (View view){myText.setText(myText.getText()+"3");}
    public void click_4 (View view){myText.setText(myText.getText()+"4");}
    public void click_5 (View view){myText.setText(myText.getText()+"5");}
    public void click_6 (View view){myText.setText(myText.getText()+"6");}
    public void click_7 (View view){myText.setText(myText.getText()+"7");}
    public void click_8 (View view){myText.setText(myText.getText()+"8");}
    public void click_9 (View view){myText.setText(myText.getText()+"9");}


    public void click_convert(View view){

        String input_string = myText.getText().toString();

        if(input_string.length()!=0) {
            notice.setText("");

            float input_currency = Float.parseFloat(input_string);
            float output_currency = 0.0f;

            if (RB_from_won.isChecked()) {
                if (RB_to_dollar.isChecked()) {
                    output_currency = input_currency *0.00077f;
                    myText.setText(input_currency+" won = " + String.valueOf(output_currency) + "dollar");
                }
                else if (RB_to_euro.isChecked()){
                    output_currency = input_currency * 0.00071f;
                    myText.setText(input_currency + " won = " +String.valueOf(output_currency) + "eruo");
                }
                else if (RB_to_yen.isChecked()){
                    output_currency = input_currency * 0.10f;
                    myText.setText(input_currency + " won = " +String.valueOf(output_currency) + "yen");
                }
                else {
                    notice.setText("Please make your choice");
                }
            }

            else if(RB_from_dollar.isChecked()){
                if(RB_to_won.isChecked()) {
                    output_currency = input_currency * 1297.69f;
                    myText.setText(input_currency+" dollar = " + String.valueOf(output_currency) + "won");
                }
                else if(RB_to_euro.isChecked()) {
                    output_currency = input_currency * 0.92f;
                    myText.setText(input_currency+" dollar = " + String.valueOf(output_currency) + "eruo");
                }
                else if(RB_to_yen.isChecked()) {
                    output_currency = input_currency * 131.01f;
                    myText.setText(input_currency+" dollar = " + String.valueOf(output_currency) + "yen");
                }
                else {
                    notice.setText("Please make your choice");
                }
            }

            else if(RB_from_euro.isChecked()) {
                if (RB_to_won.isChecked()) {
                    output_currency = input_currency * 1404.80f;
                    myText.setText(input_currency + " eruo = " + String.valueOf(output_currency) + "won");
                } else if (RB_to_dollar.isChecked()) {
                    output_currency = input_currency * 1.08f;
                    myText.setText(input_currency + " eruo = " + String.valueOf(output_currency) + "dollar");
                } else if (RB_to_yen.isChecked()) {
                    output_currency = input_currency * 141.76f;
                    myText.setText(input_currency + " eruo = " + String.valueOf(output_currency) + "yens");
                } else {
                    notice.setText("Please make your choice");
                }
            }

            else if(RB_from_yen.isChecked()) {
                if (RB_to_won.isChecked()) {
                    output_currency = input_currency * 9.91f;
                    myText.setText(input_currency + " yen = " + String.valueOf(output_currency) + "won");
                } else if (RB_to_dollar.isChecked()) {
                    output_currency = input_currency * 0.0076f;
                    myText.setText(input_currency + " yen = " + String.valueOf(output_currency) + "dollar");
                } else if (RB_to_euro.isChecked()) {
                    output_currency = input_currency * 0.0071f;
                    myText.setText(input_currency + " yen = " + String.valueOf(output_currency) + "euro");
                } else {
                    notice.setText("Please make your choice");
                }
            }
            else {
                notice.setText("Please make your choice");
            }
        }
        else {
            notice.setText("Please insert an amount");
        }

    }


    public void click_dot(View view) {
        String myText_string = myText.getText().toString();
        if (!myText_string.contains(".")) {
            myText.setText(myText.getText() + ".");
        }
    }

    public void click_clear(View view)
    {
        myText.setText("");
        notice.setText("");

        RB_group_to.clearCheck();
        RB_group_from.clearCheck();

        RB_to_won.setEnabled(true);
        RB_to_dollar.setEnabled(true);
        RB_to_euro.setEnabled(true);
        RB_to_yen.setEnabled(true);
    }

    public void click_rb_from_won(View view)
    {
        RB_to_won.setEnabled(false);
        RB_to_dollar.setEnabled(true);
        RB_to_euro.setEnabled(true);
        RB_to_yen.setEnabled(true);

        RB_group_to.clearCheck();
    }

    public void click_rb_from_dollar(View view)
    {
        RB_to_won.setEnabled(true);
        RB_to_dollar.setEnabled(false);
        RB_to_euro.setEnabled(true);
        RB_to_yen.setEnabled(true);

        RB_group_to.clearCheck();
    }
    public void click_rb_from_euro(View view)
    {
        RB_to_won.setEnabled(true);
        RB_to_dollar.setEnabled(true);
        RB_to_euro.setEnabled(false);
        RB_to_yen.setEnabled(true);

        RB_group_to.clearCheck();
    }
    public void click_rb_from_yen(View view)
    {
        RB_to_won.setEnabled(true);
        RB_to_dollar.setEnabled(true);
        RB_to_euro.setEnabled(true);
        RB_to_yen.setEnabled(false);

        RB_group_to.clearCheck();
    }


}