├── app ├── .gitignore ├── src │ ├── main │ │ ├── ic_launcher-web.png │ │ ├── res │ │ │ ├── drawable │ │ │ │ ├── ic_launcher.png │ │ │ │ ├── drawable-hdpi │ │ │ │ │ └── ic_calculator.png │ │ │ │ ├── drawable-ldpi │ │ │ │ │ └── ic_calculator.png │ │ │ │ ├── drawable-mdpi │ │ │ │ │ └── ic_calculator.png │ │ │ │ ├── drawable-xhdpi │ │ │ │ │ └── ic_calculator.png │ │ │ │ ├── drawable-xxhdpi │ │ │ │ │ └── ic_calculator.png │ │ │ │ ├── drawable-xxxhdpi │ │ │ │ │ └── ic_calculator.png │ │ │ │ └── button_color.xml │ │ │ ├── drawable-hdpi │ │ │ │ └── ic_launcher.png │ │ │ ├── drawable-mdpi │ │ │ │ └── ic_launcher.png │ │ │ ├── drawable-xhdpi │ │ │ │ └── ic_launcher.png │ │ │ ├── values │ │ │ │ ├── dimens.xml │ │ │ │ ├── colors.xml │ │ │ │ ├── styles.xml │ │ │ │ └── strings.xml │ │ │ ├── values-w820dp │ │ │ │ └── dimens.xml │ │ │ ├── menu │ │ │ │ └── menu_main.xml │ │ │ └── layout │ │ │ │ ├── app_bar.xml │ │ │ │ └── activity_main.xml │ │ ├── AndroidManifest.xml │ │ └── java │ │ │ └── calculator │ │ │ └── xzya │ │ │ └── ro │ │ │ └── calculator │ │ │ ├── OnSwipeTouchListener.java │ │ │ ├── Parser.java │ │ │ ├── Checker.java │ │ │ ├── Postfix.java │ │ │ └── MainActivity.java │ └── androidTest │ │ └── java │ │ └── calculator │ │ └── xzya │ │ └── ro │ │ └── calculator │ │ └── ApplicationTest.java ├── build.gradle └── proguard-rules.pro ├── settings.gradle ├── README.md ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── .gitignore ├── gradle.properties ├── gradlew.bat └── gradlew /app/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | include ':app' 2 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Calculator 2 | Android Calculator App 3 | ![Pic](http://i.imgur.com/s7NgxOM.png) 4 | -------------------------------------------------------------------------------- /app/src/main/ic_launcher-web.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Xzya/Calculator/master/app/src/main/ic_launcher-web.png -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Xzya/Calculator/master/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /app/src/main/res/drawable/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Xzya/Calculator/master/app/src/main/res/drawable/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Xzya/Calculator/master/app/src/main/res/drawable-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-mdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Xzya/Calculator/master/app/src/main/res/drawable-mdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-xhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Xzya/Calculator/master/app/src/main/res/drawable-xhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/drawable/drawable-hdpi/ic_calculator.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Xzya/Calculator/master/app/src/main/res/drawable/drawable-hdpi/ic_calculator.png -------------------------------------------------------------------------------- /app/src/main/res/drawable/drawable-ldpi/ic_calculator.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Xzya/Calculator/master/app/src/main/res/drawable/drawable-ldpi/ic_calculator.png -------------------------------------------------------------------------------- /app/src/main/res/drawable/drawable-mdpi/ic_calculator.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Xzya/Calculator/master/app/src/main/res/drawable/drawable-mdpi/ic_calculator.png -------------------------------------------------------------------------------- /app/src/main/res/drawable/drawable-xhdpi/ic_calculator.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Xzya/Calculator/master/app/src/main/res/drawable/drawable-xhdpi/ic_calculator.png -------------------------------------------------------------------------------- /app/src/main/res/drawable/drawable-xxhdpi/ic_calculator.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Xzya/Calculator/master/app/src/main/res/drawable/drawable-xxhdpi/ic_calculator.png -------------------------------------------------------------------------------- /app/src/main/res/drawable/drawable-xxxhdpi/ic_calculator.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Xzya/Calculator/master/app/src/main/res/drawable/drawable-xxxhdpi/ic_calculator.png -------------------------------------------------------------------------------- /app/src/main/res/values/dimens.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 16dp 4 | 16dp 5 | 6 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Wed Apr 10 15:27:10 PDT 2013 2 | distributionBase=GRADLE_USER_HOME 3 | distributionPath=wrapper/dists 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-all.zip 7 | -------------------------------------------------------------------------------- /app/src/main/res/values/colors.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | #607D8B 5 | #455A64 6 | #90A4AE 7 | #536DFE 8 | #ECEFF1 9 | 10 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/button_color.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /app/src/main/res/values-w820dp/dimens.xml: -------------------------------------------------------------------------------- 1 | 2 | 5 | 64dp 6 | 7 | -------------------------------------------------------------------------------- /app/src/main/res/menu/menu_main.xml: -------------------------------------------------------------------------------- 1 | 5 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /app/src/androidTest/java/calculator/xzya/ro/calculator/ApplicationTest.java: -------------------------------------------------------------------------------- 1 | package calculator.xzya.ro.calculator; 2 | 3 | import android.app.Application; 4 | import android.test.ApplicationTestCase; 5 | 6 | /** 7 | * Testing Fundamentals 8 | */ 9 | public class ApplicationTest extends ApplicationTestCase { 10 | public ApplicationTest() { 11 | super(Application.class); 12 | } 13 | } -------------------------------------------------------------------------------- /app/src/main/res/layout/app_bar.xml: -------------------------------------------------------------------------------- 1 | 2 | 9 | 10 | -------------------------------------------------------------------------------- /app/src/main/res/values/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 12 | 13 | 14 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | #built application files 2 | *.apk 3 | *.ap_ 4 | 5 | # files for the dex VM 6 | *.dex 7 | 8 | # Java class files 9 | *.class 10 | 11 | # generated files 12 | bin/ 13 | gen/ 14 | 15 | # Local configuration file (sdk path, etc) 16 | local.properties 17 | 18 | # Windows thumbnail db 19 | Thumbs.db 20 | 21 | # OSX files 22 | .DS_Store 23 | 24 | # Eclipse project files 25 | .classpath 26 | .project 27 | 28 | # Android Studio 29 | .idea 30 | #.idea/workspace.xml - remove # 31 | .gradle 32 | build/ 33 | /*/build/ 34 | *.iml 35 | *.iws 36 | *.ipr 37 | *~ 38 | *.swp 39 | 40 | # Eclipse project files 41 | .classpath 42 | .project -------------------------------------------------------------------------------- /app/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | 3 | android { 4 | compileSdkVersion 21 5 | buildToolsVersion "21.1.2" 6 | 7 | defaultConfig { 8 | applicationId "calculator.xzya.ro.calculator" 9 | minSdkVersion 15 10 | targetSdkVersion 21 11 | versionCode 1 12 | versionName "1.0" 13 | } 14 | buildTypes { 15 | release { 16 | minifyEnabled false 17 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 18 | } 19 | } 20 | } 21 | 22 | dependencies { 23 | compile fileTree(dir: 'libs', include: ['*.jar']) 24 | compile 'com.android.support:appcompat-v7:21.0.+' 25 | } 26 | -------------------------------------------------------------------------------- /app/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # By default, the flags in this file are appended to flags specified 3 | # in D:\Program Files\Android\sdk/tools/proguard/proguard-android.txt 4 | # You can edit the include path and order by changing the proguardFiles 5 | # directive in build.gradle. 6 | # 7 | # For more details, see 8 | # http://developer.android.com/guide/developing/tools/proguard.html 9 | 10 | # Add any project specific keep options here: 11 | 12 | # If your project uses WebView with JS, uncomment the following 13 | # and specify the fully qualified class name to the JavaScript interface 14 | # class: 15 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 16 | # public *; 17 | #} 18 | -------------------------------------------------------------------------------- /app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 10 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | -------------------------------------------------------------------------------- /gradle.properties: -------------------------------------------------------------------------------- 1 | # Project-wide Gradle settings. 2 | 3 | # IDE (e.g. Android Studio) users: 4 | # Gradle settings configured through the IDE *will override* 5 | # any settings specified in this file. 6 | 7 | # For more details on how to configure your build environment visit 8 | # http://www.gradle.org/docs/current/userguide/build_environment.html 9 | 10 | # Specifies the JVM arguments used for the daemon process. 11 | # The setting is particularly useful for tweaking memory settings. 12 | # Default value: -Xmx10248m -XX:MaxPermSize=256m 13 | # org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8 14 | 15 | # When configured, Gradle will run in incubating parallel mode. 16 | # This option should only be used with decoupled projects. More details, visit 17 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects 18 | # org.gradle.parallel=true -------------------------------------------------------------------------------- /app/src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Calculator 5 | Calculator 6 | Hello world! 7 | Settings 8 | Enter new expression 9 | 7 10 | 8 11 | 9 12 | x 13 | C 14 | 4 15 | 5 16 | 6 17 | / 18 | 19 | 1 20 | 2 21 | 3 22 | + 23 | = 24 | 0 25 | . 26 | - 27 | ( 28 | ( 29 | ) 30 | x\u207F 31 | √x 32 | +/- 33 | x! 34 | Ans 35 | Shift 36 | sin 37 | sin\u207B\u00B9 38 | cos 39 | cos\u207B\u00B9 40 | tan 41 | tan\u207B\u00B9 42 | log 43 | log\u2082 44 | 45 | 46 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @if "%DEBUG%" == "" @echo off 2 | @rem ########################################################################## 3 | @rem 4 | @rem Gradle startup script for Windows 5 | @rem 6 | @rem ########################################################################## 7 | 8 | @rem Set local scope for the variables with windows NT shell 9 | if "%OS%"=="Windows_NT" setlocal 10 | 11 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 12 | set DEFAULT_JVM_OPTS= 13 | 14 | set DIRNAME=%~dp0 15 | if "%DIRNAME%" == "" set DIRNAME=. 16 | set APP_BASE_NAME=%~n0 17 | set APP_HOME=%DIRNAME% 18 | 19 | @rem Find java.exe 20 | if defined JAVA_HOME goto findJavaFromJavaHome 21 | 22 | set JAVA_EXE=java.exe 23 | %JAVA_EXE% -version >NUL 2>&1 24 | if "%ERRORLEVEL%" == "0" goto init 25 | 26 | echo. 27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 28 | echo. 29 | echo Please set the JAVA_HOME variable in your environment to match the 30 | echo location of your Java installation. 31 | 32 | goto fail 33 | 34 | :findJavaFromJavaHome 35 | set JAVA_HOME=%JAVA_HOME:"=% 36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 37 | 38 | if exist "%JAVA_EXE%" goto init 39 | 40 | echo. 41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 42 | echo. 43 | echo Please set the JAVA_HOME variable in your environment to match the 44 | echo location of your Java installation. 45 | 46 | goto fail 47 | 48 | :init 49 | @rem Get command-line arguments, handling Windowz variants 50 | 51 | if not "%OS%" == "Windows_NT" goto win9xME_args 52 | if "%@eval[2+2]" == "4" goto 4NT_args 53 | 54 | :win9xME_args 55 | @rem Slurp the command line arguments. 56 | set CMD_LINE_ARGS= 57 | set _SKIP=2 58 | 59 | :win9xME_args_slurp 60 | if "x%~1" == "x" goto execute 61 | 62 | set CMD_LINE_ARGS=%* 63 | goto execute 64 | 65 | :4NT_args 66 | @rem Get arguments from the 4NT Shell from JP Software 67 | set CMD_LINE_ARGS=%$ 68 | 69 | :execute 70 | @rem Setup the command line 71 | 72 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 73 | 74 | @rem Execute Gradle 75 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% 76 | 77 | :end 78 | @rem End local scope for the variables with windows NT shell 79 | if "%ERRORLEVEL%"=="0" goto mainEnd 80 | 81 | :fail 82 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 83 | rem the _cmd.exe /c_ return code! 84 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 85 | exit /b 1 86 | 87 | :mainEnd 88 | if "%OS%"=="Windows_NT" endlocal 89 | 90 | :omega 91 | -------------------------------------------------------------------------------- /app/src/main/java/calculator/xzya/ro/calculator/OnSwipeTouchListener.java: -------------------------------------------------------------------------------- 1 | package calculator.xzya.ro.calculator; 2 | 3 | import android.content.Context; 4 | import android.view.GestureDetector; 5 | import android.view.GestureDetector.SimpleOnGestureListener; 6 | import android.view.MotionEvent; 7 | import android.view.View; 8 | import android.widget.Toast; 9 | 10 | /** 11 | * Created by Xzya on 24/2/2015. 12 | */ 13 | public class OnSwipeTouchListener implements View.OnTouchListener { 14 | 15 | final GestureDetector gestureDetector; 16 | 17 | public OnSwipeTouchListener (Context ctx){ 18 | gestureDetector = new GestureDetector(ctx, new GestureListener()); 19 | } 20 | 21 | @Override 22 | public boolean onTouch(View view, MotionEvent motionEvent) { 23 | return false; 24 | } 25 | 26 | private final class GestureListener extends SimpleOnGestureListener { 27 | 28 | private static final int SWIPE_THRESHOLD = 50; 29 | private static final int SWIPE_VELOCITY_THRESHOLD = 50; 30 | 31 | @Override 32 | public boolean onDown(MotionEvent e) { 33 | return true; 34 | } 35 | 36 | @Override 37 | public boolean onSingleTapConfirmed(MotionEvent e) { 38 | return super.onSingleTapConfirmed(e); 39 | } 40 | 41 | @Override 42 | public boolean onSingleTapUp(MotionEvent e) { 43 | onClick(); 44 | return super.onSingleTapUp(e); 45 | } 46 | 47 | @Override 48 | public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { 49 | boolean result = false; 50 | try { 51 | float diffY = e2.getY() - e1.getY(); 52 | float diffX = e2.getX() - e1.getX(); 53 | if (Math.abs(diffX) > Math.abs(diffY)) { 54 | if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) { 55 | if (diffX > 0) { 56 | onSwipeRight(); 57 | } else { 58 | onSwipeLeft(); 59 | } 60 | } 61 | result = true; 62 | } 63 | else if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) { 64 | if (diffY > 0) { 65 | onSwipeBottom(); 66 | } else { 67 | onSwipeTop(); 68 | } 69 | } 70 | result = true; 71 | 72 | } catch (Exception exception) { 73 | exception.printStackTrace(); 74 | } 75 | return result; 76 | } 77 | } 78 | 79 | public void onSwipeRight() { 80 | } 81 | 82 | public void onSwipeLeft() { 83 | } 84 | 85 | public void onSwipeTop() { 86 | } 87 | 88 | public void onSwipeBottom() { 89 | } 90 | 91 | public void onClick() { 92 | } 93 | } -------------------------------------------------------------------------------- /app/src/main/java/calculator/xzya/ro/calculator/Parser.java: -------------------------------------------------------------------------------- 1 | package calculator.xzya.ro.calculator; 2 | 3 | import java.util.LinkedList; 4 | import java.util.Queue; 5 | import java.util.Stack; 6 | 7 | /** 8 | * The parser is based on the Shunting-yard algorithm 9 | * 10 | * @author Dumitru Mihail Cristian 11 | * @see //http://en.wikipedia.org/wiki/Shunting-yard_algorithm 12 | * 13 | */ 14 | 15 | public class Parser { 16 | 17 | public LinkedList stringToQueue(String inputString) { 18 | LinkedList inputStack = new LinkedList(); 19 | 20 | int len = inputString.length(); 21 | for (int i = 0; i < len; i++) { 22 | inputStack.add(String.valueOf(inputString.charAt(i))); 23 | } 24 | 25 | return inputStack; 26 | } 27 | 28 | /** 29 | * Prints the output string 30 | * @param stuff 31 | */ 32 | public void printOutput(Queue stuff){ 33 | StringBuilder string = new StringBuilder(); 34 | // stuff.forEach(c -> { 35 | // string.append(c); 36 | // }); 37 | System.out.println(string.toString()); 38 | } 39 | 40 | /** 41 | * Parses the expression 42 | * @param incomingInput - input expression as a list 43 | * @return output list 44 | */ 45 | public LinkedList parse(LinkedList incomingInput){ 46 | LinkedList output = new LinkedList(); 47 | Stack stack = new Stack(); 48 | LinkedList input = (LinkedList) incomingInput.clone(); 49 | 50 | while (!input.isEmpty()){ 51 | String token = input.remove(); 52 | 53 | if (Checker.isNumeric(token)){ 54 | output.add(token); 55 | } else if (Checker.isFunction(token)){ 56 | stack.push(token); 57 | } else if (Checker.isFunctionSeparator(token)){ 58 | while (!stack.isEmpty() && 59 | !stack.peek().equals("(")){ 60 | output.add(stack.pop()); 61 | } 62 | if (stack.peek().equals("(")){ 63 | 64 | } else { 65 | System.err.println("The separator or parentheses were misplaced."); 66 | return null; 67 | } 68 | } else if (Checker.isOperator(token)){ 69 | while (!stack.isEmpty() && Checker.isOperator(stack.peek()) && 70 | ((Checker.isLeftAssociative(token) && (Checker.getPrecedence(token) <= Checker.getPrecedence(stack.peek())) || 71 | (!Checker.isLeftAssociative(token) && (Checker.getPrecedence(token) < Checker.getPrecedence(stack.peek()))))) 72 | ){ 73 | output.add(stack.pop()); 74 | } 75 | stack.push(token); 76 | } else if (token.equals("(")){ 77 | stack.push(token); 78 | } else if (token.equals(")")){ 79 | while (!stack.isEmpty() && !stack.peek().equals("(")){ 80 | output.add(stack.pop()); 81 | } 82 | if (stack.peek().equals("(")){ 83 | stack.pop(); 84 | if (!stack.isEmpty() && Checker.isFunction(stack.peek())){ 85 | output.add(stack.pop()); 86 | } 87 | } else { 88 | System.err.println("There are mismatched parentheses."); 89 | return null; 90 | } 91 | 92 | } 93 | } 94 | 95 | if (input.isEmpty()){ 96 | while (!stack.isEmpty()){ 97 | if (stack.peek().equals("(") || stack.peek().equals(")")){ 98 | System.err.println("There are mismatched parentheses."); 99 | return null; 100 | } 101 | output.add(stack.pop()); 102 | } 103 | } 104 | return output; 105 | } 106 | 107 | public static void main(String[] args) { 108 | 109 | Parser test = new Parser(); 110 | String s1 = "1+((2*5)^(3/5))"; 111 | LinkedList s1q = test.stringToQueue(s1); 112 | 113 | LinkedList s1test = test.parse(s1q); 114 | test.printOutput(s1test); 115 | 116 | } 117 | 118 | } 119 | -------------------------------------------------------------------------------- /app/src/main/java/calculator/xzya/ro/calculator/Checker.java: -------------------------------------------------------------------------------- 1 | package calculator.xzya.ro.calculator; 2 | 3 | public class Checker { 4 | 5 | public static boolean isNumeric(String str) { 6 | try { 7 | double d = Double.parseDouble(str); 8 | } catch (NumberFormatException nfe) { 9 | return false; 10 | } 11 | return true; 12 | } 13 | 14 | public static boolean isFunction(String token) { 15 | if ( 16 | token.equals("sqrt") || 17 | token.equals("sin") || 18 | token.equals("asin") || 19 | token.equals("cos") || 20 | token.equals("acos") || 21 | token.equals("tan") || 22 | token.equals("atan") || 23 | token.equals("log") || 24 | token.equals("log2")) { 25 | return true; 26 | } 27 | return false; 28 | } 29 | 30 | public static boolean isFunctionSeparator(String token) { 31 | if ( 32 | token.equals(",")) { 33 | return true; 34 | } 35 | return false; 36 | } 37 | 38 | public static boolean isOperator(String token) { 39 | if ( 40 | token.equals("+") || 41 | token.equals("-") || 42 | token.equals("*") || 43 | token.equals("/") || 44 | token.equals("^") || 45 | token.equals("%") || 46 | token.equals("!")) { 47 | return true; 48 | } 49 | return false; 50 | } 51 | 52 | public static boolean isLeftAssociative(String token) { 53 | if ( 54 | token.equals("*") || 55 | token.equals("/") || 56 | token.equals("+") || 57 | token.equals("-") || 58 | token.equals("!")) { 59 | return true; 60 | } 61 | return false; 62 | } 63 | 64 | public static int getPrecedence(String token) { 65 | switch (token) { 66 | case "+": 67 | return 2; 68 | case "-": 69 | return 2; 70 | case "*": 71 | return 3; 72 | case "/": 73 | return 3; 74 | case "%": 75 | return 3; 76 | case "^": 77 | return 4; 78 | case "!": 79 | return 5; 80 | default: 81 | return 1; 82 | } 83 | } 84 | 85 | public static int numberOfParameters(String token) { 86 | switch (token) { 87 | case "+": 88 | return 2; 89 | case "-": 90 | return 2; 91 | case "*": 92 | return 2; 93 | case "/": 94 | return 2; 95 | case "^": 96 | return 2; 97 | case "%": 98 | return 2; 99 | case "!": 100 | return 1; 101 | case "sqrt": 102 | return 1; 103 | case "sin": 104 | return 1; 105 | case "asin": 106 | return 1; 107 | case "cos": 108 | return 1; 109 | case "acos": 110 | return 1; 111 | case "tan": 112 | return 1; 113 | case "atan": 114 | return 1; 115 | case "log": 116 | return 1; 117 | case "log2": 118 | return 1; 119 | default: 120 | return -1; 121 | } 122 | } 123 | 124 | } 125 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env bash 2 | 3 | ############################################################################## 4 | ## 5 | ## Gradle start up script for UN*X 6 | ## 7 | ############################################################################## 8 | 9 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 10 | DEFAULT_JVM_OPTS="" 11 | 12 | APP_NAME="Gradle" 13 | APP_BASE_NAME=`basename "$0"` 14 | 15 | # Use the maximum available, or set MAX_FD != -1 to use that value. 16 | MAX_FD="maximum" 17 | 18 | warn ( ) { 19 | echo "$*" 20 | } 21 | 22 | die ( ) { 23 | echo 24 | echo "$*" 25 | echo 26 | exit 1 27 | } 28 | 29 | # OS specific support (must be 'true' or 'false'). 30 | cygwin=false 31 | msys=false 32 | darwin=false 33 | case "`uname`" in 34 | CYGWIN* ) 35 | cygwin=true 36 | ;; 37 | Darwin* ) 38 | darwin=true 39 | ;; 40 | MINGW* ) 41 | msys=true 42 | ;; 43 | esac 44 | 45 | # For Cygwin, ensure paths are in UNIX format before anything is touched. 46 | if $cygwin ; then 47 | [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"` 48 | fi 49 | 50 | # Attempt to set APP_HOME 51 | # Resolve links: $0 may be a link 52 | PRG="$0" 53 | # Need this for relative symlinks. 54 | while [ -h "$PRG" ] ; do 55 | ls=`ls -ld "$PRG"` 56 | link=`expr "$ls" : '.*-> \(.*\)$'` 57 | if expr "$link" : '/.*' > /dev/null; then 58 | PRG="$link" 59 | else 60 | PRG=`dirname "$PRG"`"/$link" 61 | fi 62 | done 63 | SAVED="`pwd`" 64 | cd "`dirname \"$PRG\"`/" >&- 65 | APP_HOME="`pwd -P`" 66 | cd "$SAVED" >&- 67 | 68 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 69 | 70 | # Determine the Java command to use to start the JVM. 71 | if [ -n "$JAVA_HOME" ] ; then 72 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 73 | # IBM's JDK on AIX uses strange locations for the executables 74 | JAVACMD="$JAVA_HOME/jre/sh/java" 75 | else 76 | JAVACMD="$JAVA_HOME/bin/java" 77 | fi 78 | if [ ! -x "$JAVACMD" ] ; then 79 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 80 | 81 | Please set the JAVA_HOME variable in your environment to match the 82 | location of your Java installation." 83 | fi 84 | else 85 | JAVACMD="java" 86 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 87 | 88 | Please set the JAVA_HOME variable in your environment to match the 89 | location of your Java installation." 90 | fi 91 | 92 | # Increase the maximum file descriptors if we can. 93 | if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then 94 | MAX_FD_LIMIT=`ulimit -H -n` 95 | if [ $? -eq 0 ] ; then 96 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 97 | MAX_FD="$MAX_FD_LIMIT" 98 | fi 99 | ulimit -n $MAX_FD 100 | if [ $? -ne 0 ] ; then 101 | warn "Could not set maximum file descriptor limit: $MAX_FD" 102 | fi 103 | else 104 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 105 | fi 106 | fi 107 | 108 | # For Darwin, add options to specify how the application appears in the dock 109 | if $darwin; then 110 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 111 | fi 112 | 113 | # For Cygwin, switch paths to Windows format before running java 114 | if $cygwin ; then 115 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 116 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 117 | 118 | # We build the pattern for arguments to be converted via cygpath 119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 120 | SEP="" 121 | for dir in $ROOTDIRSRAW ; do 122 | ROOTDIRS="$ROOTDIRS$SEP$dir" 123 | SEP="|" 124 | done 125 | OURCYGPATTERN="(^($ROOTDIRS))" 126 | # Add a user-defined pattern to the cygpath arguments 127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 129 | fi 130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 131 | i=0 132 | for arg in "$@" ; do 133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 135 | 136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 138 | else 139 | eval `echo args$i`="\"$arg\"" 140 | fi 141 | i=$((i+1)) 142 | done 143 | case $i in 144 | (0) set -- ;; 145 | (1) set -- "$args0" ;; 146 | (2) set -- "$args0" "$args1" ;; 147 | (3) set -- "$args0" "$args1" "$args2" ;; 148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;; 149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 154 | esac 155 | fi 156 | 157 | # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules 158 | function splitJvmOpts() { 159 | JVM_OPTS=("$@") 160 | } 161 | eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS 162 | JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME" 163 | 164 | exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@" 165 | -------------------------------------------------------------------------------- /app/src/main/java/calculator/xzya/ro/calculator/Postfix.java: -------------------------------------------------------------------------------- 1 | package calculator.xzya.ro.calculator; 2 | 3 | import java.util.LinkedList; 4 | import java.util.Stack; 5 | 6 | /** 7 | * This is a simple postfix calculator implementation. 8 | * 9 | * @author Dumitru Mihail Cristian 10 | * @see //http://en.wikipedia.org/wiki/Reverse_Polish_notation 11 | */ 12 | 13 | public class Postfix { 14 | 15 | private Parser parser; 16 | 17 | public Postfix() { 18 | this.parser = new Parser(); 19 | } 20 | 21 | /** 22 | * Evaluates the expression 23 | * 24 | * @param input - input linked list, each operator/number is 25 | * stored in the list as an element 26 | * @return string - result as a string 27 | */ 28 | public String evaluate(LinkedList input) { 29 | String result = null; 30 | LinkedList output = parser.parse(input); 31 | if (output == null){ 32 | return "ERROR"; 33 | } 34 | 35 | result = evaluater(output); 36 | 37 | return result; 38 | } 39 | 40 | /** 41 | * Helper function 42 | * 43 | * @param incomingOutput - output from the parser 44 | * @return string - result as a string 45 | */ 46 | private String evaluater(LinkedList incomingOutput) { 47 | Stack stack = new Stack(); 48 | LinkedList output = (LinkedList) incomingOutput.clone(); 49 | 50 | while (!output.isEmpty()) { 51 | String token = output.removeFirst(); 52 | 53 | if (Checker.isNumeric(token)) { 54 | stack.push(token); 55 | } else { 56 | int n = Checker.numberOfParameters(token); 57 | if (stack.size() < n) { 58 | System.err.println("There are insufficient values in the expression."); 59 | } else { 60 | LinkedList arguments = new LinkedList(); 61 | for (int i = 0; i < n; i++) { 62 | arguments.push(stack.pop()); 63 | } 64 | Double result = evaluateOperator(token, arguments); 65 | if (result != null){ 66 | stack.push(result.toString()); 67 | } 68 | } 69 | } 70 | } 71 | if (stack.size() == 1) { 72 | if (!stack.isEmpty()){ 73 | return stack.pop(); 74 | } 75 | } else { 76 | System.err.println("The user input has too many values."); 77 | System.out.println(stack.toString()); 78 | } 79 | 80 | return "ERROR"; 81 | } 82 | 83 | /** 84 | * Helper function 85 | * Checks the operator and applies the corresponding operation 86 | * 87 | * @param token - the operator 88 | * @param arguments - list of arguments for the operator 89 | * @return 90 | */ 91 | private Double evaluateOperator(String token, LinkedList arguments) { 92 | Double result = null; 93 | 94 | switch (token) { 95 | case "+": 96 | result = add(arguments.pop(), arguments.pop()); 97 | break; 98 | case "-": 99 | result = subtract(arguments.pop(), arguments.pop()); 100 | break; 101 | case "*": 102 | result = multiply(arguments.pop(), arguments.pop()); 103 | break; 104 | case "/": 105 | result = divide(arguments.pop(), arguments.pop()); 106 | break; 107 | case "^": 108 | result = pow(arguments.pop(), arguments.pop()); 109 | break; 110 | case "!": 111 | Integer temp = factorial(arguments.pop()); 112 | if (temp != null){ 113 | result = temp.doubleValue(); 114 | } else { 115 | return null; 116 | } 117 | break; 118 | case "sqrt": 119 | result = sqrt(arguments.pop()); 120 | break; 121 | case "sin": 122 | result = sin(arguments.pop()); 123 | break; 124 | case "asin": 125 | result = asin(arguments.pop()); 126 | break; 127 | case "cos": 128 | result = cos(arguments.pop()); 129 | break; 130 | case "acos": 131 | result = acos(arguments.pop()); 132 | break; 133 | case "tan": 134 | result = tan(arguments.pop()); 135 | break; 136 | case "atan": 137 | result = atan(arguments.pop()); 138 | break; 139 | case "log": 140 | result = log(arguments.pop()); 141 | break; 142 | case "log2": 143 | result = log2(arguments.pop()); 144 | break; 145 | } 146 | 147 | 148 | return result; 149 | } 150 | 151 | /** 152 | * Adds two numbers together 153 | * 154 | * @param a first number 155 | * @param b second number 156 | * @return result 157 | */ 158 | private double add(String a, String b) { 159 | Double valA = Double.parseDouble(a); 160 | Double valB = Double.parseDouble(b); 161 | 162 | return valA + valB; 163 | } 164 | 165 | /** 166 | * Subtracts two numbers 167 | * 168 | * @param a first number 169 | * @param b second number 170 | * @return result 171 | */ 172 | private double subtract(String a, String b) { 173 | Double valA = Double.parseDouble(a); 174 | Double valB = Double.parseDouble(b); 175 | 176 | return valA - valB; 177 | } 178 | 179 | /** 180 | * Multiply two numbers together 181 | * 182 | * @param a first number 183 | * @param b second number 184 | * @return result 185 | */ 186 | private double multiply(String a, String b) { 187 | Double valA = Double.parseDouble(a); 188 | Double valB = Double.parseDouble(b); 189 | 190 | return valA * valB; 191 | } 192 | 193 | /** 194 | * Divides two numbers 195 | * 196 | * @param a first number 197 | * @param b second number 198 | * @return result 199 | */ 200 | private double divide(String a, String b) { 201 | Double valA = Double.parseDouble(a); 202 | Double valB = Double.parseDouble(b); 203 | 204 | return valA / valB; 205 | } 206 | 207 | /** 208 | * Raises the first number to the power of the second number 209 | * 210 | * @param a first number 211 | * @param b second number 212 | * @return result 213 | */ 214 | private double pow(String a, String b) { 215 | Double valA = Double.parseDouble(a); 216 | Double valB = Double.parseDouble(b); 217 | 218 | return Math.pow(valA, valB); 219 | } 220 | 221 | /** 222 | * Gives the square root of the number 223 | * 224 | * @param a the number 225 | * @return result 226 | */ 227 | private double sqrt(String a) { 228 | Double valA = Double.parseDouble(a); 229 | 230 | return Math.sqrt(valA); 231 | } 232 | 233 | /** 234 | * Gives the sine 235 | * @param a the number 236 | * @return result 237 | */ 238 | private double sin(String a){ 239 | Double valA = Double.parseDouble(a); 240 | 241 | return Math.sin(valA); 242 | } 243 | 244 | /** 245 | * Gives the arcsine 246 | * @param a the number 247 | * @return result 248 | */ 249 | private double asin(String a){ 250 | Double valA = Double.parseDouble(a); 251 | 252 | return Math.asin(valA); 253 | } 254 | 255 | /** 256 | * Gives the cosine 257 | * @param a the number 258 | * @return result 259 | */ 260 | private double cos(String a){ 261 | Double valA = Double.parseDouble(a); 262 | 263 | return Math.cos(valA); 264 | } 265 | 266 | /** 267 | * Gives the arccosine 268 | * @param a the number 269 | * @return result 270 | */ 271 | private double acos(String a){ 272 | Double valA = Double.parseDouble(a); 273 | 274 | return Math.acos(valA); 275 | } 276 | 277 | /** 278 | * Gives the tangent 279 | * @param a the number 280 | * @return result 281 | */ 282 | private double tan(String a){ 283 | Double valA = Double.parseDouble(a); 284 | 285 | return Math.tan(valA); 286 | } 287 | 288 | /** 289 | * Gives the arctangent 290 | * @param a the number 291 | * @return result 292 | */ 293 | private double atan(String a){ 294 | Double valA = Double.parseDouble(a); 295 | 296 | return Math.atan(valA); 297 | } 298 | 299 | /** 300 | * Gives the log 301 | * @param a the number 302 | * @return result 303 | */ 304 | private Double log(String a){ 305 | Double valA = Double.parseDouble(a); 306 | 307 | return Math.log10(valA); 308 | } 309 | 310 | /** 311 | * Gives the log2 312 | * @param a the number 313 | * @return result 314 | */ 315 | private double log2(String a){ 316 | Double valA = Double.parseDouble(a); 317 | 318 | return Math.log(valA)/Math.log(2); 319 | } 320 | 321 | 322 | private Integer factorial(String a) { 323 | Integer n = null; 324 | try { 325 | n = Integer.parseInt(a); 326 | } catch(NumberFormatException e){ 327 | e.printStackTrace(); 328 | return null; 329 | } 330 | 331 | int p = 1; 332 | while (n != 0) { 333 | p *= n; 334 | n -= 1; 335 | } 336 | return p; 337 | } 338 | 339 | public static void main(String[] args) { 340 | 341 | Postfix evaluator = new Postfix(); 342 | 343 | String s1 = "1+((2*5)^(3/5)/sqrt(5))"; 344 | 345 | } 346 | 347 | } 348 | -------------------------------------------------------------------------------- /app/src/main/java/calculator/xzya/ro/calculator/MainActivity.java: -------------------------------------------------------------------------------- 1 | package calculator.xzya.ro.calculator; 2 | 3 | import android.os.Bundle; 4 | import android.support.v7.app.ActionBarActivity; 5 | import android.view.Menu; 6 | import android.view.MenuItem; 7 | import android.view.View; 8 | import android.widget.TextView; 9 | 10 | import java.util.LinkedList; 11 | 12 | 13 | public class MainActivity extends ActionBarActivity { 14 | 15 | private android.support.v7.widget.Toolbar toolbar; 16 | private TextView expression; 17 | private TextView result; 18 | private TextView one; 19 | private TextView two; 20 | private TextView three; 21 | private TextView four; 22 | private TextView five; 23 | private TextView six; 24 | private TextView seven; 25 | private TextView eight; 26 | private TextView nine; 27 | private TextView zero; 28 | private TextView plus; 29 | private TextView minus; 30 | private TextView multiply; 31 | private TextView divide; 32 | private TextView pow; 33 | private TextView square_root; 34 | private TextView factorial; 35 | private TextView dot; 36 | private TextView left_parentheses; 37 | private TextView right_parentheses; 38 | private TextView backspace; 39 | private TextView erase; 40 | private TextView equals; 41 | private TextView answer; 42 | private TextView change_sign; 43 | private TextView shift; 44 | private TextView sin; 45 | private TextView cos; 46 | private TextView tan; 47 | private TextView log; 48 | 49 | private Postfix postfix; 50 | private String ans; 51 | private LinkedList input; 52 | private boolean shiftPressed = false; 53 | 54 | @Override 55 | protected void onCreate(Bundle savedInstanceState) { 56 | super.onCreate(savedInstanceState); 57 | setContentView(R.layout.activity_main); 58 | 59 | toolbar = (android.support.v7.widget.Toolbar) findViewById(R.id.app_bar); 60 | 61 | setSupportActionBar(toolbar); 62 | 63 | postfix = new Postfix(); 64 | input = new LinkedList(); 65 | 66 | expression = (TextView) findViewById(R.id.expression); 67 | result = (TextView) findViewById(R.id.result); 68 | one = (TextView) findViewById(R.id.one); 69 | two = (TextView) findViewById(R.id.two); 70 | three = (TextView) findViewById(R.id.three); 71 | four = (TextView) findViewById(R.id.four); 72 | five = (TextView) findViewById(R.id.five); 73 | six = (TextView) findViewById(R.id.six); 74 | seven = (TextView) findViewById(R.id.seven); 75 | eight = (TextView) findViewById(R.id.eight); 76 | nine = (TextView) findViewById(R.id.nine); 77 | zero = (TextView) findViewById(R.id.zero); 78 | plus = (TextView) findViewById(R.id.plus); 79 | minus = (TextView) findViewById(R.id.subtract); 80 | multiply = (TextView) findViewById(R.id.multiply); 81 | divide = (TextView) findViewById(R.id.divide); 82 | pow = (TextView) findViewById(R.id.pow); 83 | square_root = (TextView) findViewById(R.id.square_root); 84 | factorial = (TextView) findViewById(R.id.factorial); 85 | dot = (TextView) findViewById(R.id.dot); 86 | backspace = (TextView) findViewById(R.id.backspace); 87 | erase = (TextView) findViewById(R.id.erase); 88 | equals = (TextView) findViewById(R.id.equals); 89 | change_sign = (TextView) findViewById(R.id.change_sign); 90 | answer = (TextView) findViewById(R.id.answer); 91 | shift = (TextView) findViewById(R.id.shift); 92 | sin = (TextView) findViewById(R.id.sin); 93 | cos = (TextView) findViewById(R.id.cos); 94 | tan = (TextView) findViewById(R.id.tan); 95 | log = (TextView) findViewById(R.id.log); 96 | left_parentheses = (TextView) findViewById(R.id.left_parentheses); 97 | right_parentheses = (TextView) findViewById(R.id.right_parentheses); 98 | 99 | one.setOnClickListener(new View.OnClickListener() { 100 | @Override 101 | public void onClick(View view) { 102 | addElement("1"); 103 | } 104 | }); 105 | 106 | two.setOnClickListener(new View.OnClickListener() { 107 | @Override 108 | public void onClick(View view) { 109 | addElement("2"); 110 | } 111 | }); 112 | 113 | three.setOnClickListener(new View.OnClickListener() { 114 | @Override 115 | public void onClick(View view) { 116 | addElement("3"); 117 | } 118 | }); 119 | 120 | four.setOnClickListener(new View.OnClickListener() { 121 | @Override 122 | public void onClick(View view) { 123 | addElement("4"); 124 | } 125 | }); 126 | 127 | five.setOnClickListener(new View.OnClickListener() { 128 | @Override 129 | public void onClick(View view) { 130 | addElement("5"); 131 | } 132 | }); 133 | 134 | six.setOnClickListener(new View.OnClickListener() { 135 | @Override 136 | public void onClick(View view) { 137 | addElement("6"); 138 | } 139 | }); 140 | 141 | seven.setOnClickListener(new View.OnClickListener() { 142 | @Override 143 | public void onClick(View view) { 144 | addElement("7"); 145 | } 146 | }); 147 | 148 | eight.setOnClickListener(new View.OnClickListener() { 149 | @Override 150 | public void onClick(View view) { 151 | addElement("8"); 152 | } 153 | }); 154 | 155 | nine.setOnClickListener(new View.OnClickListener() { 156 | @Override 157 | public void onClick(View view) { 158 | addElement("9"); 159 | } 160 | }); 161 | 162 | zero.setOnClickListener(new View.OnClickListener() { 163 | @Override 164 | public void onClick(View view) { 165 | addElement("0"); 166 | } 167 | }); 168 | 169 | dot.setOnClickListener(new View.OnClickListener() { 170 | @Override 171 | public void onClick(View view) { 172 | if (!input.isEmpty()) { 173 | if (!input.peekLast().contains(".")){ 174 | addElement("."); 175 | } 176 | } else { 177 | addElement("."); 178 | } 179 | } 180 | }); 181 | 182 | plus.setOnClickListener(new View.OnClickListener() { 183 | @Override 184 | public void onClick(View view) { 185 | addElement("+"); 186 | } 187 | }); 188 | 189 | minus.setOnClickListener(new View.OnClickListener() { 190 | @Override 191 | public void onClick(View view) { 192 | addElement("-"); 193 | } 194 | }); 195 | 196 | multiply.setOnClickListener(new View.OnClickListener() { 197 | @Override 198 | public void onClick(View view) { 199 | addElement("*"); 200 | } 201 | }); 202 | 203 | divide.setOnClickListener(new View.OnClickListener() { 204 | @Override 205 | public void onClick(View view) { 206 | addElement("/"); 207 | } 208 | }); 209 | 210 | pow.setOnClickListener(new View.OnClickListener() { 211 | @Override 212 | public void onClick(View view) { 213 | addElement("^"); 214 | } 215 | }); 216 | 217 | square_root.setOnClickListener(new View.OnClickListener() { 218 | @Override 219 | public void onClick(View view) { 220 | addFunctionHelper("sqrt"); 221 | } 222 | }); 223 | 224 | factorial.setOnClickListener(new View.OnClickListener() { 225 | @Override 226 | public void onClick(View view) { 227 | addElement("!"); 228 | } 229 | }); 230 | 231 | left_parentheses.setOnClickListener(new View.OnClickListener() { 232 | @Override 233 | public void onClick(View view) { 234 | addElement("("); 235 | } 236 | }); 237 | 238 | right_parentheses.setOnClickListener(new View.OnClickListener() { 239 | @Override 240 | public void onClick(View view) { 241 | addElement(")"); 242 | } 243 | }); 244 | 245 | erase.setOnClickListener(new View.OnClickListener() { 246 | @Override 247 | public void onClick(View view) { 248 | input.clear(); 249 | expression.setText(""); 250 | result.setText(""); 251 | } 252 | }); 253 | 254 | backspace.setOnClickListener(new View.OnClickListener() { 255 | @Override 256 | public void onClick(View view) { 257 | if (!input.isEmpty()) { 258 | if (Checker.isNumeric(input.peekLast())) { 259 | String temp = input.removeLast(); 260 | temp = temp.substring(0, temp.length() - 1); 261 | if (!temp.isEmpty()) { 262 | input.addLast(temp); 263 | } 264 | } else { 265 | input.removeLast(); 266 | } 267 | StringBuilder tempText = new StringBuilder(); 268 | for (String s : input) { 269 | tempText.append(s); 270 | } 271 | expression.setText(tempText.toString()); 272 | } 273 | } 274 | }); 275 | 276 | answer.setOnClickListener(new View.OnClickListener() { 277 | @Override 278 | public void onClick(View view) { 279 | if (ans != null) { 280 | if (!input.isEmpty()) { 281 | if (!Checker.isNumeric(input.peekLast())) { 282 | input.addLast(ans); 283 | setExpressionText(); 284 | } 285 | } else { 286 | input.addLast(ans); 287 | setExpressionText(); 288 | } 289 | } 290 | } 291 | }); 292 | 293 | change_sign.setOnClickListener(new View.OnClickListener() { 294 | @Override 295 | public void onClick(View view) { 296 | if (!input.isEmpty() && Checker.isNumeric(input.peekLast())) { 297 | Double temp = Double.parseDouble(input.removeLast()); 298 | temp *= -1; 299 | input.addLast(temp.toString()); 300 | setExpressionText(); 301 | } 302 | } 303 | }); 304 | 305 | shift.setOnClickListener(new View.OnClickListener() { 306 | @Override 307 | public void onClick(View view) { 308 | if (shiftPressed == false) { 309 | shiftPressed = true; 310 | 311 | sin.setText(R.string.sin2); 312 | cos.setText(R.string.cos2); 313 | tan.setText(R.string.tan2); 314 | log.setText(R.string.log2); 315 | 316 | } else { 317 | shiftPressed = false; 318 | 319 | sin.setText(R.string.sin1); 320 | cos.setText(R.string.cos1); 321 | tan.setText(R.string.tan1); 322 | log.setText(R.string.log1); 323 | } 324 | } 325 | }); 326 | 327 | sin.setOnClickListener(new View.OnClickListener() { 328 | @Override 329 | public void onClick(View view) { 330 | if (shiftPressed) { 331 | addFunctionHelper("asin"); 332 | } else { 333 | addFunctionHelper("sin"); 334 | } 335 | } 336 | }); 337 | 338 | cos.setOnClickListener(new View.OnClickListener() { 339 | @Override 340 | public void onClick(View view) { 341 | if (shiftPressed) { 342 | addFunctionHelper("acos"); 343 | } else { 344 | addFunctionHelper("cos"); 345 | } 346 | } 347 | }); 348 | 349 | tan.setOnClickListener(new View.OnClickListener() { 350 | @Override 351 | public void onClick(View view) { 352 | if (shiftPressed) { 353 | addFunctionHelper("atan"); 354 | } else { 355 | addFunctionHelper("tan"); 356 | } 357 | } 358 | }); 359 | 360 | log.setOnClickListener(new View.OnClickListener() { 361 | @Override 362 | public void onClick(View view) { 363 | if (shiftPressed) { 364 | addFunctionHelper("log2"); 365 | } else { 366 | addFunctionHelper("log"); 367 | } 368 | } 369 | }); 370 | 371 | equals.setOnClickListener(new View.OnClickListener() { 372 | @Override 373 | public void onClick(View view) { 374 | if (!input.isEmpty()) { 375 | Thread t = new Thread(new Runnable() { 376 | @Override 377 | public void run() { 378 | final String tempResult = postfix.evaluate(input); 379 | if (!tempResult.equals("ERROR") && !tempResult.equals("NaN")) { 380 | ans = tempResult.toString(); 381 | } 382 | 383 | runOnUiThread(new Runnable() { 384 | @Override 385 | public void run() { 386 | result.setText(tempResult); 387 | } 388 | }); 389 | } 390 | }); 391 | t.start(); 392 | } 393 | } 394 | }); 395 | 396 | 397 | } 398 | 399 | private void addFunctionHelper(String element){ 400 | if (!input.isEmpty()){ 401 | if (Checker.isNumeric(input.peekLast()) || input.peekLast().equals(")")){ 402 | addElement("*"); 403 | addElement(element); 404 | addElement("("); 405 | } else { 406 | addElement(element); 407 | addElement("("); 408 | } 409 | } else { 410 | addElement(element); 411 | addElement("("); 412 | } 413 | } 414 | 415 | private void addElement(final String element) { 416 | if (!input.isEmpty()) { 417 | if ((Checker.isNumeric(element) || element.equals(".")) && (Checker.isNumeric(input.peekLast()) || input.peekLast().equals("."))) { 418 | String token = input.removeLast(); 419 | token += element; 420 | input.addLast(token); 421 | } else if (Checker.isOperator(element) && Checker.isOperator(input.peekLast())) { 422 | input.removeLast(); 423 | input.addLast(element); 424 | } else { 425 | input.addLast(element); 426 | } 427 | } else { 428 | input.addLast(element); 429 | } 430 | 431 | setExpressionText(); 432 | } 433 | 434 | private void setExpressionText() { 435 | StringBuilder text = new StringBuilder(); 436 | for (String s : input) { 437 | text.append(s); 438 | } 439 | expression.setText(text.toString()); 440 | } 441 | 442 | 443 | @Override 444 | public boolean onCreateOptionsMenu(Menu menu) { 445 | // Inflate the menu; this adds items to the action bar if it is present. 446 | getMenuInflater().inflate(R.menu.menu_main, menu); 447 | return true; 448 | } 449 | 450 | @Override 451 | public boolean onOptionsItemSelected(MenuItem item) { 452 | // Handle action bar item clicks here. The action bar will 453 | // automatically handle clicks on the Home/Up button, so long 454 | // as you specify a parent activity in AndroidManifest.xml. 455 | int id = item.getItemId(); 456 | 457 | //noinspection SimplifiableIfStatement 458 | if (id == R.id.action_settings) { 459 | return true; 460 | } 461 | 462 | return super.onOptionsItemSelected(item); 463 | } 464 | } 465 | -------------------------------------------------------------------------------- /app/src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 6 | 7 | 10 | 11 | 20 | 21 | 29 | 30 | 37 | 38 | 39 | 40 | 46 | 47 | 52 | 53 | 62 | 63 | 72 | 73 | 82 | 83 | 92 | 93 | 102 | 103 | 104 | 105 | 110 | 111 | 120 | 121 | 130 | 131 | 140 | 141 | 150 | 151 | 160 | 161 | 162 | 163 | 168 | 169 | 170 | 179 | 180 | 189 | 190 | 199 | 200 | 209 | 210 | 219 | 220 | 221 | 222 | 223 | 228 | 229 | 238 | 239 | 248 | 249 | 258 | 259 | 268 | 269 | 270 | 279 | 280 | 281 | 282 | 283 | 288 | 289 | 298 | 299 | 308 | 309 | 318 | 319 | 328 | 329 | 338 | 339 | 340 | 341 | 342 | 347 | 348 | 349 | 358 | 359 | 368 | 369 | 378 | 379 | 388 | 389 | 398 | 399 | 400 | 401 | 402 | 403 | 404 | 405 | --------------------------------------------------------------------------------