Cloud101.eu: Calculator Cloud101CalculatorActivity.java

package com.cloud101;

import com.cloud101.calculator.Calculator;
import com.cloud101.windows.Alertwindow;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ImageView;

public class Cloud101CalculatorActivity extends Activity {
    /** Called when the activity is first created. */
    private String numberDisplayed = "";
    private Double resultNumber = 0.0;
    private Calculator calc = new Calculator();
    private EditText textView, resultView;
    private boolean plus, minus, devide, mult = false;
    protected String storedNumber;


    private void updateTextField() {
        textView.setText(this.numberDisplayed);
        resultView.setText(this.resultNumber.toString());

    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        textView = (EditText) findViewById(R.id.entry);
        resultView = (EditText) findViewById(R.id.result);
        ImageView image = (ImageView) findViewById(R.id.c101_image);

        final Button button0 = (Button) findViewById(R.id.button0);

        button0.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                numberDisplayed += "0";
                updateTextField();
            }
        });

        final Button button1 = (Button) findViewById(R.id.button1);

        button1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                numberDisplayed += "1";
                updateTextField();
            }
        });

        final Button buttonBs = (Button) findViewById(R.id.buttonBackspace);
        buttonBs.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                if (numberDisplayed.length() >= 1) {
                    numberDisplayed = numberDisplayed.substring(0,
                            numberDisplayed.length() - 1);
                }
                updateTextField();
            }
        });

        final Button button2 = (Button) findViewById(R.id.button2);
        button2.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                numberDisplayed += "2";
                updateTextField();
            }
        });

        final Button button3 = (Button) findViewById(R.id.button3);
        button3.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                numberDisplayed += "3";
                updateTextField();
            }
        });

        final Button button4 = (Button) findViewById(R.id.button4);
        button4.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                numberDisplayed += "4";
                updateTextField();
            }
        });

        final Button button5 = (Button) findViewById(R.id.button5);
        button5.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                numberDisplayed += "5";
                updateTextField();
            }
        });

        final Button button6 = (Button) findViewById(R.id.button6);
        button6.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                numberDisplayed += "6";
                updateTextField();
            }
        });

        final Button button7 = (Button) findViewById(R.id.button7);
        button7.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                numberDisplayed += "7";
                updateTextField();
            }
        });

        final Button button8 = (Button) findViewById(R.id.button8);
        button8.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                numberDisplayed += "8";
                updateTextField();
            }
        });

        final Button button9 = (Button) findViewById(R.id.button9);
        button9.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                numberDisplayed += "9";
                updateTextField();
            }
        });

        final Button buttonClear = (Button) findViewById(R.id.buttonClear);
        buttonClear.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                numberDisplayed = "";
                storedNumber = "";
                plus = false;
                devide = false;
                minus = false;
                mult = false;
                resultNumber = 0d;
                updateTextField();
            }
        });

        final Button buttonPlus = (Button) findViewById(R.id.buttonPlus);
        buttonPlus.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                processNumbers();
                plus = true;
                devide = false;
                minus = false;
                mult = false;

            }

        });
        final Button buttonDot = (Button) findViewById(R.id.buttonDot);
        buttonDot.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                if (numberDisplayed.equals("")) {
                    numberDisplayed = "0.";
                } else if (!numberDisplayed.contains(".")) {
                    numberDisplayed += ".";
                }
                updateTextField();
            }
        });

        final Button buttonMinus = (Button) findViewById(R.id.buttonMinus);
        buttonMinus.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {

                processNumbers();
                plus = false;
                devide = false;
                minus = true;
                mult = false;
            }
        });

        final Button buttonEq = (Button) findViewById(R.id.buttonEq);
        buttonEq.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {

                processNumbers();
            }
        });

        final Button buttonMult = (Button) findViewById(R.id.buttonMult);
        buttonMult.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {

                processNumbers();
                plus = false;
                devide = false;
                minus = false;
                mult = true;
            }
        });

        final Button buttonDevide = (Button) findViewById(R.id.buttonDevide);
        buttonDevide.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {

                processNumbers();
                plus = false;
                devide = true;
                minus = false;
                mult = false;


            }
        });

        final ImageButton c101_image = (ImageButton) findViewById(R.id.c101_image);
        c101_image.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://cloud101.eu/blog"));
                startActivity(browserIntent);
            }
        });

    }


    protected void devideAlert() {
        Alertwindow alert = new Alertwindow(this,"Can't devide by zero");

    }

    private void processNumbers() {

        testNumberDisplayed();
        if (plus) {
            resultNumber = calc.sum(Double.parseDouble(numberDisplayed),
                    resultNumber);
        } else

        if (minus) {
            resultNumber = calc.difference(resultNumber,
                    Double.parseDouble(numberDisplayed));
        } else if (mult) {
            resultNumber = calc.product(resultNumber,
                    Double.parseDouble(numberDisplayed));
        } else if (devide) {
            String resultDev = calc.devide(resultNumber, Double.parseDouble(numberDisplayed));
            if(resultDev.equals("Can't devide by zero")){
                devideAlert();
            }else{
                resultNumber = new Double(resultDev);
            }
        } else {
            resultNumber = new Double(numberDisplayed);
        }

        numberDisplayed = "";
        updateTextField();
    }

    private void testNumberDisplayed() {
        if (numberDisplayed.equals("")) {
            if (!mult && !devide) {
                numberDisplayed = "0";
            } else {
                numberDisplayed = "1";
            }

        }

    }
}