Student Email Address: trlai@myseneca.ca
package com.example.trlaidps924assignment1;
import java.util.ArrayList;
public class Calculator {
ArrayList<String> characters = new ArrayList<>(20);
void push(String value) {
characters.add(value);
}
int performCalculation(int leftNum, String operator, int rightNum) {
int result;
switch (operator) {
case "+":
result = leftNum + rightNum;
break;
case "-":
result = leftNum - rightNum;
break;
case "*":
result = leftNum * rightNum;
break;
case "/":
result = leftNum / rightNum;
break;
case "%":
result = leftNum % rightNum;
break;
case "pow":
result = (int) Math.pow(leftNum, rightNum);
break;
case "max":
result = Math.max(leftNum, rightNum);
break;
case "min":
result = Math.min(leftNum, rightNum);
break;
default:
result = -999;
}
return result;
}
int calculate() {
int result = -999;
if (characters.size() > 2) {
for (int i = 0; i < characters.size(); i++) {
if (i == 0) {
String leftChar = characters.remove(0);
String middleChar = characters.remove(0);
String rightChar = characters.remove(0);
if (leftChar.matches("[0-9]") && middleChar.matches("[+\\-*/%]|(pow)|(max)|(min)") && rightChar.matches("[0-9]")) {
int leftNum = Integer.parseInt(leftChar);
int rightNum = Integer.parseInt(rightChar);
result = performCalculation(leftNum, middleChar, rightNum);
} else {
return result;
}
} else {
String middleChar = characters.remove(0);
String rightChar = characters.remove(0);
if (middleChar.matches("[+\\-*/%]|(pow)|(max)|(min)") && rightChar.matches("[0-9]")) {
int rightNum = Integer.parseInt(rightChar);
result = performCalculation(result, middleChar, rightNum);
} else {
return result;
}
}
}
}
characters.clear();
return result;
}
}package com.example.trlaidps924assignment1;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.ContextCompat;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
import java.util.Locale;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
TextView display;
Button zero_btn;
Button one_btn;
Button two_btn;
Button three_btn;
Button four_btn;
Button five_btn;
Button six_btn;
Button seven_btn;
Button eight_btn;
Button nine_btn;
Button plus_btn;
Button minus_btn;
Button multiply_btn;
Button divide_btn;
Button equals_btn;
Button clear_btn;
Button advanced_btn;
LinearLayout advanced_menu;
Button mod_btn;
Button pow_btn;
Button max_btn;
Button min_btn;
Calculator calculator;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
display = findViewById(R.id.display);
zero_btn = findViewById(R.id.zero_btn);
zero_btn.setOnClickListener(this);
one_btn = findViewById(R.id.one_btn);
one_btn.setOnClickListener(this);
two_btn = findViewById(R.id.two_btn);
two_btn.setOnClickListener(this);
three_btn = findViewById(R.id.three_btn);
three_btn.setOnClickListener(this);
four_btn = findViewById(R.id.four_btn);
four_btn.setOnClickListener(this);
five_btn = findViewById(R.id.five_btn);
five_btn.setOnClickListener(this);
six_btn = findViewById(R.id.six_btn);
six_btn.setOnClickListener(this);
seven_btn = findViewById(R.id.seven_btn);
seven_btn.setOnClickListener(this);
eight_btn = findViewById(R.id.eight_btn);
eight_btn.setOnClickListener(this);
nine_btn = findViewById(R.id.nine_btn);
nine_btn.setOnClickListener(this);
plus_btn = findViewById(R.id.plus_btn);
plus_btn.setOnClickListener(this);
minus_btn = findViewById(R.id.minus_btn);
minus_btn.setOnClickListener(this);
multiply_btn = findViewById(R.id.multiply_btn);
multiply_btn.setOnClickListener(this);
divide_btn = findViewById(R.id.divide_btn);
divide_btn.setOnClickListener(this);
equals_btn = findViewById(R.id.equals_btn);
equals_btn.setOnClickListener(this);
clear_btn = findViewById(R.id.clear_btn);
clear_btn.setOnClickListener(this);
advanced_btn = findViewById(R.id.advanced_btn);
advanced_btn.setOnClickListener(this);
advanced_menu = findViewById(R.id.advanced_menu);
mod_btn = findViewById(R.id.mod_btn);
mod_btn.setOnClickListener(this);
pow_btn = findViewById(R.id.pow_btn);
pow_btn.setOnClickListener(this);
max_btn = findViewById(R.id.max_btn);
max_btn.setOnClickListener(this);
min_btn = findViewById(R.id.min_btn);
min_btn.setOnClickListener(this);
calculator = new Calculator();
}
@Override
public void onClick(View view) {
int id = view.getId();
String value;
int result;
Log.d("button id clicked", "Button with ID " + id + " clicked");
display.setTextColor(ContextCompat.getColor(this, R.color.white));
if (display.getText().toString().contains("=") || id == R.id.clear_btn) {
calculator.characters.clear();
display.setText("");
}
if (id == R.id.zero_btn) {
value = zero_btn.getText().toString();
calculator.push(value);
display.append(value + " ");
} else if (id == R.id.one_btn) {
value = one_btn.getText().toString();
calculator.push(value);
display.append(value + " ");
} else if (id == R.id.two_btn) {
value = two_btn.getText().toString();
calculator.push(value);
display.append(value + " ");
} else if (id == R.id.three_btn) {
value = three_btn.getText().toString();
calculator.push(value);
display.append(value + " ");
} else if (id == R.id.four_btn) {
value = four_btn.getText().toString();
calculator.push(value);
display.append(value + " ");
} else if (id == R.id.five_btn) {
value = five_btn.getText().toString();
calculator.push(value);
display.append(value + " ");
} else if (id == R.id.six_btn) {
value = six_btn.getText().toString();
calculator.push(value);
display.append(value + " ");
} else if (id == R.id.seven_btn) {
value = seven_btn.getText().toString();
calculator.push(value);
display.append(value + " ");
} else if (id == R.id.eight_btn) {
value = eight_btn.getText().toString();
calculator.push(value);
display.append(value + " ");
} else if (id == R.id.nine_btn) {
value = nine_btn.getText().toString();
calculator.push(value);
display.append(value + " ");
} else if (id == R.id.plus_btn) {
value = plus_btn.getText().toString();
calculator.push(value);
display.append(value + " ");
} else if (id == R.id.minus_btn) {
value = minus_btn.getText().toString();
calculator.push(value);
display.append(value + " ");
} else if (id == R.id.multiply_btn) {
value = multiply_btn.getText().toString();
calculator.push(value);
display.append(value + " ");
} else if (id == R.id.divide_btn) {
value = divide_btn.getText().toString();
calculator.push(value);
display.append(value + " ");
} else if (id == R.id.equals_btn) {
value = equals_btn.getText().toString();
result = calculator.calculate();
display.append(" " + value);
if (result == -999) {
display.append(" Not an Operator");
display.setTextColor(ContextCompat.getColor(this, R.color.light_pink));
} else {
display.append(" " + result);
}
} else if (id == R.id.advanced_btn) {
if (advanced_menu.getVisibility() == View.INVISIBLE) {
advanced_menu.setVisibility(View.VISIBLE);
advanced_btn.setText(getResources().getString(R.string.standard_btn));
} else {
advanced_menu.setVisibility(View.INVISIBLE);
advanced_btn.setText(getResources().getString(R.string.advanced_btn));
}
} else if (id == R.id.mod_btn) {
value = mod_btn.getText().toString();
calculator.push(value);
display.append(value + " ");
} else if (id == R.id.pow_btn) {
value = pow_btn.getText().toString();
calculator.push(value.toLowerCase(Locale.ROOT));
display.append(value + " ");
} else if (id == R.id.max_btn) {
value = max_btn.getText().toString();
calculator.push(value.toLowerCase(Locale.ROOT));
display.append(value + " ");
} else if (id == R.id.min_btn) {
value = min_btn.getText().toString();
calculator.push(value.toLowerCase(Locale.ROOT));
display.append(value + " ");
}
}
}<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:background="@color/dark_teal"
android:orientation="vertical"
android:layout_gravity="center"
tools:context=".MainActivity">
<TextView
android:id="@+id/display"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/darkest_teal"
android:text=""
android:textAlignment="center"
android:textColor="@color/white"
android:textSize="25sp"
android:textFontWeight="700"
android:paddingTop="30sp"
android:paddingBottom="30sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="20dp"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:weightSum="4"
style="?android:attr/buttonBarStyle">
<Button
android:id="@+id/one_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_1"
android:textAlignment="center"
android:textSize="20sp"
android:textFontWeight="700"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
<Button
android:id="@+id/two_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_2"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
<Button
android:id="@+id/three_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_3"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
<Button
android:id="@+id/plus_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_4"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:weightSum="4"
style="?android:attr/buttonBarStyle">
<Button
android:id="@+id/four_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_5"
android:textAlignment="center"
android:textSize="20sp"
android:textFontWeight="700"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
<Button
android:id="@+id/five_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_6"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
<Button
android:id="@+id/six_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_7"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
<Button
android:id="@+id/minus_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_8"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:weightSum="4"
style="?android:attr/buttonBarStyle">
<Button
android:id="@+id/seven_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_9"
android:textAlignment="center"
android:textSize="20sp"
android:textFontWeight="700"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
<Button
android:id="@+id/eight_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_10"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
<Button
android:id="@+id/nine_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_11"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
<Button
android:id="@+id/multiply_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_12"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:weightSum="4"
style="?android:attr/buttonBarStyle">
<Button
android:id="@+id/clear_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_13"
android:textAlignment="center"
android:textSize="20sp"
android:textFontWeight="700"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
<Button
android:id="@+id/zero_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_14"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
<Button
android:id="@+id/equals_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_15"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
<Button
android:id="@+id/divide_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/btn_16"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:gravity="center"
style="?android:attr/buttonBarStyle">
<Button
android:id="@+id/advanced_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/advanced_btn"
android:textAlignment="center"
android:textSize="20sp"
android:textFontWeight="700"
android:textColor="@color/white"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="bottom"
android:orientation="horizontal">
<LinearLayout
android:id="@+id/advanced_menu"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:padding="10dp"
android:gravity="center"
android:weightSum="4"
android:orientation="horizontal"
android:background="@color/light_teal"
android:outlineAmbientShadowColor="@color/darkest_teal"
android:visibility="invisible"
style="?android:attr/buttonBarStyle">
<Button
android:id="@+id/mod_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/advanced_menu_btn_1"
android:textAlignment="center"
android:textSize="20sp"
android:textFontWeight="700"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
<Button
android:id="@+id/pow_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/advanced_menu_btn_2"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
<Button
android:id="@+id/max_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/advanced_menu_btn_3"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
<Button
android:id="@+id/min_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/btn_bg"
android:text="@string/advanced_menu_btn_4"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="@color/white"
android:layout_weight="1"
android:layout_margin="5dp"
android:padding="10dp"
style="?android:attr/buttonBarButtonStyle"/>
</LinearLayout>
</LinearLayout>
</LinearLayout>