Chapter 2

SQLite veri tabanı oluşturma, tablo ve kayıt ekleme bu verileri logcat da kullanıcıya gösterme gibi işlemler.

Author: merttanm

MathOperations/app/src/main/java/com/merttan/mathoperations/MainActivity.kt

@@ -14,8 +14,26 @@ class MainActivity : AppCompatActivity() {
         setContentView(R.layout.activity_main)
 
         println(arcTan(2.3,3.5))
-        println(TAU)
-
+        println("TAU:  $TAU")
+        println("PI:   $PI")
+        println("PI/2: $PI_ON_2 ")
+        println("PI/3: $PI_ON_3 ")
+        println("PI/4: $PI_ON_4 ")
+        println("PI/6: $PI_ON_6 ")
+        println("e:    $E")
+        println("sqr2: $ROOT2")
+        println("sqr3: $ROOT3")
+        println("sin45:$ROOT2")
+        println("cos30:$ROOT3")
+        println("cos45:$ROOT2")
+        println("sin60:$ROOT3")
+        println("60                 derece:${toRadians(60.0)} radyan ")
+        println("1.0471975511965976 radyan:${toDegrees(1.0471975511965976)} derece")
+        println("sin(1.2):     ${sin(1.2)}")
+        println("arcSin(0.2):  ${arcSin(0.2)}")
+        println("cos((1.2):    ${cos(1.2)}")
+        println("arcCos(0.2):  ${arcCOS(0.2)}")
+        println("tan(1.2):     ${tan(1.2)}")
 
     }
 }

MathOperations/app/src/main/java/com/merttan/mathoperations/Math.kt

@@ -1,5 +1,7 @@
 package com.merttan.mathoperations
 import kotlin.math.PI
+import kotlin.math.acos
+import kotlin.math.asin
 import kotlin.math.atan
 
     //  CONSTANTS
@@ -10,18 +12,34 @@ import kotlin.math.atan
     const val PI_ON_4 = PI/4   // 45 derece
     const val PI_ON_6 = PI/6   // 30 derece
     const val E =  Math.E      //  e = 2,7182818284590452353
-
-
-fun arcTan(oppositeY: Double, adjacentX: Double): Double {
-    var tan = atan(oppositeY / adjacentX)
-
-    if (adjacentX < 0)
-        tan += PI
-    else if (oppositeY < 0)
-        tan += TAU
-
-    return tan
-}
+    const val ROOT2 = 1.41421356237 // Kök2
+    const val ROOT3 = 1.73205080757 // kök3
+    const val SİN45 = ROOT2 /2 //  sin45 ve cos45 derece
+    const val COS45 = SİN45    //  cos45
+    const val COS30 = ROOT3 /2 //  cos30 ve sin60 derece
+    const val SİN60 = COS30    //  sin 60
+
+    //  TRİGONOMETRİ
+
+    fun sin(radians:Double)=kotlin.math.sin(radians)
+    fun arcSin(sin :Double)=asin(sin)
+    fun cos(radians:Double)=kotlin.math.cos(radians)
+    fun arcCOS(cos :Double)=acos(cos)
+    fun tan(radians:Double)=kotlin.math.tan(radians)
+
+    fun arcTan(oppositeY: Double, adjacentX: Double): Double {
+        var tan = atan(oppositeY / adjacentX)
+
+        if (adjacentX < 0)
+            tan += PI
+        else if (oppositeY < 0)
+            tan += TAU
+
+        return tan
+    }
+    fun toRadians(degrees: Double) = degrees / 180.0 * PI
+
+    fun toDegrees(radians: Double) = radians * 180.0 / PI
 
 
 

SQLiteKotlin/.gitignore

@@ -0,0 +1,15 @@
+*.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

SQLiteKotlin/.idea/.gitignore

@@ -0,0 +1 @@
+/build

SQLiteKotlin/.idea/compiler.xml

@@ -0,0 +1,45 @@
+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+}
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.2"
+
+    defaultConfig {
+        applicationId "com.merttan.sqlitekotlin"
+        minSdkVersion 30
+        targetSdkVersion 30
+        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
+    }
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+}
+
+dependencies {
+
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation 'androidx.core:core-ktx:1.3.2'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.3.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    testImplementation 'junit:junit:4.+'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+}

SQLiteKotlin/.idea/gradle.xml

@@ -0,0 +1,21 @@
+# 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

SQLiteKotlin/.idea/jarRepositories.xml

@@ -0,0 +1,24 @@
+package com.merttan.sqlitekotlin
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.merttan.sqlitekotlin", appContext.packageName)
+    }
+}

SQLiteKotlin/.idea/misc.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.merttan.sqlitekotlin">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.SQLiteKotlin">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

SQLiteKotlin/.idea/vcs.xml

@@ -0,0 +1,34 @@
+package com.merttan.sqlitekotlin
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+
+class MainActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+
+        try {
+            val myDatabase =this.openOrCreateDatabase("Muzisyenler", MODE_PRIVATE, null)  // Veri tabanı oluşturuyoruz
+            myDatabase.execSQL("CREATE TABLE IF NOT EXISTS Muzisyenler (isim VARCHAR, yas INT)")    // Tablo oluşturuyor
+            myDatabase.execSQL("INSERT INTO Muzisyenler (isim, yas) VALUES ('mert',25)")            // Tabloya veri ekliyor
+
+            var cursor = myDatabase.rawQuery("SELECT * FROM Muzisyenler", null)        // Tablo içerisindeki her veriyi çekiyoruz
+            var nameIndex = cursor.getColumnIndex("isim")
+            var ageIndex = cursor.getColumnIndex("yas")
+
+            while(cursor.moveToNext()){
+                // indexleri gezecek
+                println("Name: " +cursor.getString(nameIndex))
+
+                println("Age: " +cursor.getString(ageIndex))
+
+            }
+            cursor.close()
+
+        }catch (e :Exception){
+            e.printStackTrace()
+        }
+
+    }
+}

SQLiteKotlin/app/.gitignore

@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>