CalcProject/.gitignore
*.iml
.gradle
/local.properties
/.idea/caches
/.idea/libraries
/.idea/modules.xml
/.idea/workspace.xml
/.idea/navEditor.xml
/.idea/assetWizardSettings.xml
.DS_Store
/build
/captures
.externalNativeBuild
.cxx
local.properties
CalcProject/app/.gitignore
/build
CalcProject/app/build.gradle
plugins {
id 'com.android.application'
}
android {
compileSdk 31
defaultConfig {
applicationId "com.example.calcproject"
minSdk 21
targetSdk 31
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
implementation 'androidx.appcompat:appcompat:1.3.1'
implementation 'com.google.android.material:material:1.4.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.1'
testImplementation 'junit:junit:4.+'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}
CalcProject/app/proguard-rules.pro
# Add project specific ProGuard rules here.
# You can control the set of applied configuration files using the
# proguardFiles setting in build.gradle.
#
# For more details, see
# http://developer.android.com/guide/developing/tools/proguard.html
# If your project uses WebView with JS, uncomment the following
# and specify the fully qualified class name to the JavaScript interface
# class:
#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
# public *;
#}
# Uncomment this to preserve the line number information for
# debugging stack traces.
#-keepattributes SourceFile,LineNumberTable
# If you keep the line number information, uncomment this to
# hide the original source file name.
#-renamesourcefileattribute SourceFile
CalcProject/app/src/androidTest/java/com/example/calcproject/ExampleInstrumentedTest.java
CalcProject/app/src/androidTest/java/com/example/calcproject/ExampleInstrumentedTest.java
package com.example.calcproject;
import android.content.Context;
import androidx.test.platform.app.InstrumentationRegistry;
import androidx.test.ext.junit.runners.AndroidJUnit4;
import org.junit.Test;
import org.junit.runner.RunWith;
import static org.junit.Assert.*;
/**
* Instrumented test, which will execute on an Android device.
*
* @see
Testing documentation
*/
@RunWith(AndroidJUnit4.class)
public class ExampleInstrumentedTest {
@Test
public void useAppContext() {
// Context of the app under test.
Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
assertEquals("com.example.calcproject", appContext.getPackageName());
}
}
CalcProject/app/src/main/AndroidManifest.xml
CalcProject/app/src/main/java/com/example/calcproject/MainActivity.java
CalcProject/app/src/main/java/com/example/calcproject/MainActivity.java
package com.example.calcproject;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
Button b1,b2,b3,b4,b5,b6,b7,b8,b9,b0,bdot,bpi,bequal,bplus,bmin,bmul,bdiv,binv,bsqrt,bsquare, bfact, bln, blog, bsin,bcos,btan,bb1,bb2,bc,bac;
TextView tvmain, tvsec;
String pi = "3.14159265";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b1 = findViewById(R.id.b1);
b2 = findViewById(R.id.b2);
b3 = findViewById(R.id.b3);
b4 = findViewById(R.id.b4);
b5 = findViewById(R.id.b5);
b6 = findViewById(R.id.b6);
b7 = findViewById(R.id.b7);
b8 = findViewById(R.id.b8);
b9 = findViewById(R.id.b9);
b0 = findViewById(R.id.b0);
bpi = findViewById(R.id.bpi);
bdot = findViewById(R.id.bdot);
bequal = findViewById(R.id.bequal);
bplus = findViewById(R.id.badd);
bmin = findViewById(R.id.bmin);
bmul = findViewById(R.id.bmul);
bdiv = findViewById(R.id.bdiv);
binv = findViewById(R.id.binv);
bsqrt = findViewById(R.id.bsqrt);
bsquare = findViewById(R.id.bsquare);
bfact = findViewById(R.id.bfact);
bln = findViewById(R.id.bln);
blog = findViewById(R.id.blog);
btan = findViewById(R.id.btan);
bsin = findViewById(R.id.bsin);
bcos = findViewById(R.id.bcos);
bb1 = findViewById(R.id.bb1);
bb2 = findViewById(R.id.bb2);
bc = findViewById(R.id.bc);
bac = findViewById(R.id.bac);
tvmain = findViewById(R.id.tvmain);
tvsec = findViewById(R.id.tvsec);
//onclick listeners
b1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"1");
}
});
b2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"2");
}
});
b3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"3");
}
});
b4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"4");
}
});
b5.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"5");
}
});
b6.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"6");
}
});
b7.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"7");
}
});
b8.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"8");
}
});
b9.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"9");
}
});
b0.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"0");
}
});
bdot.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+".");
}
});
bac.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText("");
tvsec.setText("");
}
});
bc.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String val = tvmain.getText().toString();
val = val.substring(0, val.length() - 1);
tvmain.setText(val);
}
});
bplus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"+");
}
});
bmin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"-");
}
});
bmul.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"×");
}
});
bdiv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"÷");
}
});
bsqrt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String val = tvmain.getText().toString();
double r = Math.sqrt(Double.parseDouble(val));
tvmain.setText(String.valueOf(r));
}
});
bb1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"(");
}
});
bb2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+")");
}
});
bpi.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvsec.setText(bpi.getText());
tvmain.setText(tvmain.getText()+pi);
}
});
bsin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"sin");
}
});
bcos.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"cos");
}
});
btan.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"tan");
}
});
binv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"^"+"(-1)");
}
});
bfact.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int val = Integer.parseInt(tvmain.getText().toString());
int fact = factorial(val);
tvmain.setText(String.valueOf(fact));
tvsec.setText(val+"!");
}
});
bsquare.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
double d = Double.parseDouble(tvmain.getText().toString());
double square = d*d;
tvmain.setText(String.valueOf(square));
tvsec.setText(d+"²");
}
});
bln.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"ln");
}
});
blog.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvmain.setText(tvmain.getText()+"log");
}
});
bequal.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String val = tvmain.getText().toString();
String replacedstr = val.replace('÷','/').replace('×','*');
double result = eval(replacedstr);
tvmain.setText(String.valueOf(result));
tvsec.setText(val);
}
});
}
//factorial function
int factorial(int n)
{
return (n==1 || n==0) ? 1 : n*factorial(n-1);
}
//eval function
public static double eval(final String str) {
return new Object() {
int pos = -1, ch;
void nextChar() {
ch = (++pos < str.length()) ? str.charAt(pos) : -1;
}
boolean eat(int charToEat) {
while (ch == ' ') nextChar();
if (ch == charToEat) {
nextChar();
return true;
}
return false;
}
double parse() {
nextChar();
double x = parseExpression();
if (pos < str.length()) throw new RuntimeException("Unexpected: " + (char)ch);
return x;
}
double parseExpression() {
double x = parseTerm();
for (;;) {
if (eat('+')) x += parseTerm(); // addition
else if (eat('-')) x -= parseTerm(); // subtraction
else return x;
}
}
double parseTerm() {
double x = parseFactor();
for (;;) {
if (eat('*')) x *= parseFactor(); // multiplication
else if (eat('/')) x /= parseFactor(); // division
else return x;
}
}
double parseFactor() {
if (eat('+')) return parseFactor(); // unary plus
if (eat('-')) return -parseFactor(); // unary minus
double x;
int startPos = this.pos;
if (eat('(')) { // parentheses
x = parseExpression();
eat(')');
} else if ((ch >= '0' && ch <= '9') || ch == '.') { // numbers
while ((ch >= '0' && ch <= '9') || ch == '.') nextChar();
x = Double.parseDouble(str.substring(startPos, this.pos));
} else if (ch >= 'a' && ch <= 'z') { // functions
while (ch >= 'a' && ch <= 'z') nextChar();
String func = str.substring(startPos, this.pos);
x = parseFactor();
if (func.equals("sqrt")) x = Math.sqrt(x);
else if (func.equals("sin")) x = Math.sin(Math.toRadians(x));
else if (func.equals("cos")) x = Math.cos(Math.toRadians(x));
else if (func.equals("tan")) x = Math.tan(Math.toRadians(x));
else if (func.equals("log")) x = Math.log10(x);
else if (func.equals("ln")) x = Math.log(x);
else throw new RuntimeException("Unknown function: " + func);
} else {
throw new RuntimeException("Unexpected: " + (char)ch);
}
if (eat('^')) x = Math.pow(x, parseFactor()); // exponentiation
return x;
}
}.parse();
}
}
CalcProject/app/src/main/res/drawable/ic_launcher_background.xml
CalcProject/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
...