edited and updated versions

README.md

@@ -1,5 +1,5 @@
 # KotlinParcelize
 
 Please find the related article in the link below:
-
+B
 https://medium.com/@burakeregar/yet-another-awesome-kotlin-feature-parcelize-5439718ba220

app/build.gradle

@@ -1,18 +1,17 @@
 apply plugin: 'com.android.application'
-
 apply plugin: 'kotlin-android'
-
 apply plugin: 'kotlin-android-extensions'
+apply plugin: 'kotlin-kapt'
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 29
     defaultConfig {
         applicationId "com.burakeregar.kotlinparcelize"
         minSdkVersion 14
-        targetSdkVersion 26
+        targetSdkVersion 29
         versionCode 1
         versionName "1.0"
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
         release {
@@ -28,11 +27,11 @@ android {
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
-    implementation 'com.android.support:appcompat-v7:26.1.0'
-    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'com.android.support.test:runner:1.0.1'
-    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
-    compile 'org.jetbrains.anko:anko:0.10.3'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
+    implementation 'org.jetbrains.anko:anko:0.10.3'
 }

app/src/androidTest/java/com/burakeregar/kotlinparcelize/ExampleInstrumentedTest.kt

@@ -1,7 +1,7 @@
 package com.burakeregar.kotlinparcelize
 
-import android.support.test.InstrumentationRegistry
-import android.support.test.runner.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
 
 import org.junit.Test
 import org.junit.runner.RunWith

app/src/main/java/com/burakeregar/kotlinparcelize/MainActivity.kt

@@ -1,17 +1,20 @@
 package com.burakeregar.kotlinparcelize
 
 import android.content.Intent
-import android.support.v7.app.AppCompatActivity
+import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import kotlinx.android.synthetic.main.activity_main.*
 
 class MainActivity : AppCompatActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
-        val intent = Intent(this, SecondActivity::class.java)
-        intent.putExtra("dataModel", PersonModel("Burak", 26))
-        startActivity(intent)
+        button.setOnClickListener {
+            val intent = Intent(this, SecondActivity::class.java)
+            intent.putExtra("dataModel", PersonModel("Burak", 26))
+            startActivity(intent)
+        }
     }
 }

app/src/main/java/com/burakeregar/kotlinparcelize/PersonModel.kt

@@ -10,4 +10,74 @@ import kotlinx.android.parcel.Parcelize
  */
 
 @Parcelize
-data class PersonModel(val name: String, val age: Int) : Parcelable
+data class PersonModel(val name: String, val age: Int) : Parcelable
+
+
+/*
+ Android Extensions plugin now includes an automatic Parcelable implementation generator.
+ Declare the serialized properties in a primary constructor and add a @Parcelize annotation,
+ and writeToParcel()/createFromParcel() methods will be created automatically.
+
+
+How To Use:
+Add the code below into your gradle.
+androidExtensions {
+    experimental = true
+}
+
+You also need to add apply plugin: ‘kotlin-android-extensions’ to your gradle file.
+However, if you have created your project using Kotlin support, it should be added automatically.
+Then add @Parcelize annotation to your model. That’s it! You don’t need to write any parcel methods anymore!
+*/
+
+/*
+* We can write equivalent PersonModel class in Java as the following:
+*
+  public class Student implements Parcelable{
+        private String id;
+        private String name;
+        private String grade;
+
+        // Constructor
+        public Student(String id, String name, String grade){
+            this.id = id;
+            this.name = name;
+            this.grade = grade;
+       }
+       // Getter and setter methods
+       .........
+       .........
+
+       // Parcelling part
+       public Student(Parcel in){
+           String[] data = new String[3];
+
+           in.readStringArray(data);
+           // the order needs to be the same as in writeToParcel() method
+           this.id = data[0];
+           this.name = data[1];
+           this.grade = data[2];
+       }
+
+       @Оverride
+       public int describeContents(){
+           return 0;
+       }
+
+       @Override
+       public void writeToParcel(Parcel dest, int flags) {
+           dest.writeStringArray(new String[] {this.id,
+                                               this.name,
+                                               this.grade});
+       }
+       public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
+           public Student createFromParcel(Parcel in) {
+               return new Student(in);
+           }
+
+           public Student[] newArray(int size) {
+               return new Student[size];
+           }
+       };
+   }
+* */

app/src/main/java/com/burakeregar/kotlinparcelize/SecondActivity.kt

@@ -1,6 +1,6 @@
 package com.burakeregar.kotlinparcelize
 
-import android.support.v7.app.AppCompatActivity
+import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
 import org.jetbrains.anko.toast
 
@@ -10,8 +10,8 @@ class SecondActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_second)
 
-        val person = intent.extras.getParcelable<PersonModel>("dataModel")
+        val person = intent.extras?.getParcelable<PersonModel>("dataModel")
 
-        toast("Name: ${person.name} age: ${person.age}")
+        toast("Name: ${person?.name} age: ${person?.age}")
     }
 }

app/src/main/res/layout/activity_main.xml

@@ -1,18 +1,19 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout 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"
     tools:context="com.burakeregar.kotlinparcelize.MainActivity">
 
-    <TextView
+    <Button
+        android:id="@+id/button"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="Hello World!"
+        android:text="Click me to send PersonModel instance to another activity"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
-</android.support.constraint.ConstraintLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/activity_second.xml

@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout 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"
     tools:context="com.burakeregar.kotlinparcelize.SecondActivity">
 
-</android.support.constraint.ConstraintLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

build.gradle

@@ -1,13 +1,13 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.2.0'
+    ext.kotlin_version = '1.3.61'
     repositories {
         google()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.android.tools.build:gradle:4.0.0-alpha08'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong

gradle.properties

@@ -9,6 +9,8 @@
 
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
+android.enableJetifier=true
+android.useAndroidX=true
 org.gradle.jvmargs=-Xmx1536m
 
 # When configured, Gradle will run in incubating parallel mode.

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1-rc-1-all.zip