├── .gitignore
├── .idea
├── codeStyles
│ ├── Project.xml
│ └── codeStyleConfig.xml
├── compiler.xml
├── gradle.xml
├── jarRepositories.xml
├── misc.xml
├── render.experimental.xml
└── vcs.xml
├── app
├── .gitignore
├── build.gradle
├── proguard-rules.pro
└── src
│ ├── androidTest
│ └── java
│ │ └── com
│ │ └── atilsamancioglu
│ │ └── classesandfunctions
│ │ └── ExampleInstrumentedTest.kt
│ ├── main
│ ├── AndroidManifest.xml
│ ├── java
│ │ └── com
│ │ │ └── atilsamancioglu
│ │ │ └── classesandfunctions
│ │ │ ├── MainActivity.kt
│ │ │ └── Simpson.kt
│ └── res
│ │ ├── drawable-v24
│ │ └── ic_launcher_foreground.xml
│ │ ├── drawable
│ │ └── ic_launcher_background.xml
│ │ ├── layout
│ │ └── activity_main.xml
│ │ ├── mipmap-anydpi-v26
│ │ ├── ic_launcher.xml
│ │ └── ic_launcher_round.xml
│ │ ├── mipmap-hdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ ├── mipmap-mdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ ├── mipmap-xhdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ ├── mipmap-xxhdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ ├── mipmap-xxxhdpi
│ │ ├── ic_launcher.png
│ │ └── ic_launcher_round.png
│ │ └── values
│ │ ├── colors.xml
│ │ ├── strings.xml
│ │ └── styles.xml
│ └── test
│ └── java
│ └── com
│ └── atilsamancioglu
│ └── classesandfunctions
│ └── ExampleUnitTest.kt
├── build.gradle
├── gradle.properties
├── gradle
└── wrapper
│ ├── gradle-wrapper.jar
│ └── gradle-wrapper.properties
├── gradlew
├── gradlew.bat
└── settings.gradle
/.gitignore:
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1 | *.iml
2 | .gradle
3 | /local.properties
4 | /.idea/caches
5 | /.idea/libraries
6 | /.idea/modules.xml
7 | /.idea/workspace.xml
8 | /.idea/navEditor.xml
9 | /.idea/assetWizardSettings.xml
10 | .DS_Store
11 | /build
12 | /captures
13 | .externalNativeBuild
14 | .cxx
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/.idea/codeStyles/Project.xml:
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/app/.gitignore:
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1 | /build
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/app/build.gradle:
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1 | apply plugin: 'com.android.application'
2 |
3 | apply plugin: 'kotlin-android'
4 |
5 | android {
6 | compileSdkVersion 33
7 | buildToolsVersion "29.0.1"
8 | defaultConfig {
9 | applicationId "com.atilsamancioglu.classesandfunctions"
10 | minSdkVersion 23
11 | targetSdkVersion 33
12 | versionCode 1
13 | versionName "1.0"
14 | testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
15 | }
16 | buildTypes {
17 | release {
18 | minifyEnabled false
19 | proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
20 | }
21 | }
22 | namespace 'com.atilsamancioglu.classesandfunctions'
23 | compileOptions {
24 | sourceCompatibility JavaVersion.VERSION_11
25 | targetCompatibility JavaVersion.VERSION_11
26 | }
27 |
28 | }
29 |
30 | dependencies {
31 | implementation fileTree(dir: 'libs', include: ['*.jar'])
32 | implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
33 | implementation 'androidx.appcompat:appcompat:1.6.1'
34 | implementation 'androidx.core:core-ktx:1.10.0'
35 | implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
36 | testImplementation 'junit:junit:4.13.2'
37 | androidTestImplementation 'androidx.test:runner:1.5.2'
38 | androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
39 | }
40 |
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/app/proguard-rules.pro:
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1 | # Add project specific ProGuard rules here.
2 | # You can control the set of applied configuration files using the
3 | # proguardFiles setting in build.gradle.
4 | #
5 | # For more details, see
6 | # http://developer.android.com/guide/developing/tools/proguard.html
7 |
8 | # If your project uses WebView with JS, uncomment the following
9 | # and specify the fully qualified class name to the JavaScript interface
10 | # class:
11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
12 | # public *;
13 | #}
14 |
15 | # Uncomment this to preserve the line number information for
16 | # debugging stack traces.
17 | #-keepattributes SourceFile,LineNumberTable
18 |
19 | # If you keep the line number information, uncomment this to
20 | # hide the original source file name.
21 | #-renamesourcefileattribute SourceFile
22 |
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/app/src/androidTest/java/com/atilsamancioglu/classesandfunctions/ExampleInstrumentedTest.kt:
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1 | package com.atilsamancioglu.classesandfunctions
2 |
3 | import androidx.test.platform.app.InstrumentationRegistry
4 | import androidx.test.ext.junit.runners.AndroidJUnit4
5 |
6 | import org.junit.Test
7 | import org.junit.runner.RunWith
8 |
9 | import org.junit.Assert.*
10 |
11 | /**
12 | * Instrumented test, which will execute on an Android device.
13 | *
14 | * See [testing documentation](http://d.android.com/tools/testing).
15 | */
16 | @RunWith(AndroidJUnit4::class)
17 | class ExampleInstrumentedTest {
18 | @Test
19 | fun useAppContext() {
20 | // Context of the app under test.
21 | val appContext = InstrumentationRegistry.getInstrumentation().targetContext
22 | assertEquals("com.atilsamancioglu.classesandfunctions", appContext.packageName)
23 | }
24 | }
25 |
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/app/src/main/java/com/atilsamancioglu/classesandfunctions/MainActivity.kt:
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1 | package com.atilsamancioglu.classesandfunctions
2 |
3 | import androidx.appcompat.app.AppCompatActivity
4 | import android.os.Bundle
5 | import android.view.View
6 | import android.widget.Button
7 | import android.widget.EditText
8 | import android.widget.TextView
9 |
10 | class MainActivity : AppCompatActivity() {
11 |
12 | private lateinit var myTextView : TextView
13 | private lateinit var myButton : Button
14 | private lateinit var nameText : EditText
15 | private lateinit var ageText : EditText
16 | private lateinit var jobText : EditText
17 | var name = ""
18 |
19 |
20 | override fun onCreate(savedInstanceState: Bundle?) {
21 | super.onCreate(savedInstanceState)
22 | setContentView(R.layout.activity_main)
23 |
24 | myTextView = findViewById(R.id.textView)
25 | myButton = findViewById(R.id.button)
26 | nameText = findViewById(R.id.nameText)
27 | ageText = findViewById(R.id.ageText)
28 | jobText = findViewById(R.id.jobText)
29 |
30 |
31 | /*
32 | myButton.setOnClickListener {
33 | myTextView.text = "button clicked 2"
34 | }
35 |
36 | */
37 |
38 | // 1) code block, reusable 2) input 3) output - return
39 |
40 | //println("hello kotlin")
41 | test()
42 | mySum(10,15)
43 |
44 | val sumResult = mySum(40,35)
45 | val result = myMultiply(10,20)
46 |
47 | println(sumResult)
48 | println(result)
49 |
50 |
51 | //Class
52 |
53 | val homer = Simpson("Homer", 50, "Nuclear")
54 |
55 | homer.setHeight(50)
56 |
57 |
58 | //Nullability
59 |
60 | var myString : String? = null
61 | myString = "test"
62 | println(myString)
63 |
64 | var myAge : Int? = null
65 | //myAge = 50
66 | // !! ?
67 |
68 | //1) !!
69 | //println(myAge!! * 10)
70 |
71 | //2) safe call
72 |
73 | println(myAge?.minus(10))
74 |
75 | //3)
76 |
77 | if(myAge != null) {
78 | println(myAge.minus(10))
79 | } else {
80 | println("myAge is null")
81 | }
82 |
83 |
84 | //4) elvis operator
85 |
86 | println(myAge?.minus(10) ?: -10)
87 |
88 | //5)
89 | myAge?.let {
90 | println(it * 10)
91 | }
92 |
93 | }
94 |
95 | fun test() {
96 | //println("test function")
97 |
98 | }
99 |
100 | fun mySum(a:Int, b:Int) {
101 |
102 | }
103 |
104 | fun myMultiply(x: Int, y: Int) : Int {
105 |
106 | //println(x*y)
107 | val result = x * y
108 | myTextView.text = "Result: ${result}"
109 |
110 | return result
111 | }
112 |
113 | fun buttonClicked(view : View) {
114 | name = nameText.text.toString()
115 | val age = ageText.text.toString().toIntOrNull()
116 | val job = jobText.text.toString()
117 | if (age != null) {
118 | val simpson = Simpson(name, age, job)
119 | myTextView.text = "Name: ${simpson.name} Age: ${simpson.age} Job: ${simpson.job}"
120 | } else {
121 | myTextView.text = "Enter your age!"
122 | }
123 |
124 | }
125 |
126 | }
127 |
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/app/src/main/java/com/atilsamancioglu/classesandfunctions/Simpson.kt:
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1 | package com.atilsamancioglu.classesandfunctions
2 |
3 | //primary constructor
4 | class Simpson( var name : String, var age: Int, var job: String) {
5 |
6 | private var height = 0
7 |
8 | fun setHeight(num : Int) {
9 | if (num > 100) {
10 | height = num
11 | }
12 | }
13 |
14 | /*
15 | //Property
16 | var name = ""
17 | var age = 0
18 | var job = ""
19 | var weight = 0
20 | var height = 0
21 |
22 | //Secondary Constructor
23 | constructor(name : String, age : Int, job : String, weight : Int) {
24 | this.name = name
25 | this.age = age
26 | this.job = job
27 | this.weight = weight
28 | }
29 |
30 | */
31 |
32 | }
33 |
34 |
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