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About Kotlin

Demystifying the inline keyword (

Parcelable in Kotlin (

Parcelize []

Kotlin: When to Use Lazy or Lateinit (

Mocking Kotlin classes with Mockito — the fast way (

Lessons from my first multiplatform Kotlin project (
Continue reading About Kotlin

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Android development tips

Разработка под Андроид: советы, инструменты и трюки


Android studio plugins

Live Templates



Step by Step: RecyclerView Swipe to Delete and Undo []


Android development tips — Part II []

Colored Tab Animated like Google Play Store []

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Java feature

  1. double brace
  2. ThreadLocal
  3. Instance Initializers
    public class Foo {
      public Foo() {
        System.out.println("constructor called");
      static {
        System.out.println("static initializer called");
        System.out.println("instance initializer called");
  4. Enum – is a class
  5. try, finally, exception
    public static int f() {
        try {
          throw new RuntimeException();
        } finally {
          return 0;
  6. URL
    new URL("").equals(new URL(""))


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Kotlin by Antonio Leiva


12 reasons why you should start using Kotlin for Android today (KAD 30)

How to use Kotlin code from Java: start using Kotlin today (KAD 29)

Sealed classes in Kotlin: enums with super-powers (KAD 28)

Objects in Kotlin: Create safe singletons in one line of code (KAD 27)

Interfaces in Kotlin. Who said interfaces can’t have code? (KAD 26)

Databases on Android with Anko and Kotlin: SQLite never was so easy (KAD 25)

Dialogs and alerts on Android using Anko and Kotlin (KAD 24)

How to mock final classes on Kotlin using Mockito 2 (KAD 23)

Unit tests on Android with Kotlin (KAD 22)

How to use Retrofit on android with Kotlin (KAD 21)

How to use Dagger 2 on Android with Kotlin (KAD 20)

How lambdas work in Kotlin. setOnClickListener transformation (KAD 18)

Operator Overload in Kotlin: Add standard operations to any class (KAD 17)

Writing a RecyclerView Adapter in Kotlin (KAD 16)

Property delegation in Kotlin: Assign values in Android without having the context (KAD 15)

Reified Types in Kotlin: how to use the type within a function (KAD 14)

Using “when” expression in Kotlin: The “switch” with super powers (KAD 13)

Ninja Functions in Kotlin. Understanding the power of generics (KAD 12)

Functional operations with collections in Kotlin (KAD 11)

Data Classes in Kotlin: save a good bunch of lines of code (KAD 10)

Using Anko to run background tasks with Kotlin in Android (KAD 09) + Anko layouts on Android. Should I forget about XMLs?

Custom Views in Android with Kotlin (KAD 06)

Kotlin Android Extensions: Say goodbye to findViewById (KAD 04)

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