best kotlin tutorial

List viewTo implement a variety of views of the permutation class (including but not limited to spinner, ListView, GridView, and so on), Android offers a wide range of adapters for assembling a specification of data, common adapters are: Array Adapter arrayadapter, Simple adapter Simpleadapter, basic adapter Baseadapter, paging adapter Pageradapter. Although the type of adapter is many, but all are not good use, with the array adapter as an example, it and spinner with the implementation of the

Code portal written in frontIn a previous article, we simply know the advantages of the new language Kotlin, but also contact some common grammar and its simple use, I believe you will have a strong interest in it, for the moment to understand that it is interested in it, ha haha. So, how do we apply this new language to Android? Today's article takes you through the development of Android apps using Kotlin

Kotlin Programming related knowledge points : Kotlin programming using IntelliJ IED and understanding Source files (. kt) Kotlin programming and other properties Kotlin programming methods such as using Kotlin programming Kotlin p

Kotlin is a JVM-based language developed by JetBrains. JetBrains, a Czech software development company in Prague, Czech Republic, has developed IntelliJ idea, a well-known IDE product that has improved significantly compared to eclipse, and some other similar products such as , Pycharm,clion and so on, and Android studio, the official Android development IDE, was developed based on IntelliJ. At this year's Google I/O conference, Google officially ackn

= "Picture 15.png" width= "height=" 370 "border=" 0 "hspace=" 0 "vspace=" 0 "style=" width:600px;height:370px; "alt=" Wkiom1lavfdc7mo0aacvbecdpnm138.png "/>In order to compile Kotlin we need the Kotlin plugin to copy the following configuration to Build.gradlebuildscript {ext.kotlin_version = ' 1.1.2 ' repositories {jcenter ()} dependencies {Classpath "Org.jetbrains.kotlin:kotlin-gradle-plugin: $

Original title: Variables in Kotlin, differences with Java. var vs val (KAD 02)Antonio LeivaTime: Nov 28, 2016Original link: http://antonioleiva.com/variables-kotlin/Lesson two of the Kotlin series: Kotlin variables differ from Java:var to Val.In this second chapter, we'll look at how variables in

Use Kotlin to implement custom Android views (KAD 06) and kotlinandroid By Antonio Leiva Time: Dec 27,201 6 Link: https://antonioleiva.com/custom-views-android-kotlin/ When reading articles about class, you may remember to use only one constructor. This is a problem for creating custom views. The Android framework wants multiple constructors to correspond to different view creation locations and view cr

(new) Kotlin get up--4. Classes and Objects This article declares :This article is written by Coder-pig , want to know other content, visible "coder-pig pigsty "Respect the work of the author, without my authorization, prohibit reprint. Reserved"Kotlin Get Up" series Directory Address: http://blog.csdn.net/coder_pig/article/details/72851862 1.Any class We all know that every class in Java has a default pa

Kotlin has been the official language of Google for more than a year, but in addition to announcing the extreme popularity of that month, the back of life has returned to calm. Many small partners follow the pace of Google's father, but also to Kotlin have a more or less understanding, GitHub also has a considerable part of the Kotlin open source projects. But pe

Activity page Jump is one of the most commonly used features of the app, in the previous chapters of the demo source has been seen many times, often click on a button on the interface, and then jump to the corresponding next page. For app developers, the implementation of this feature is very common, using Java encoding but the following two lines of code: Intent Intent = new Intent (mainactivity.this, linearlayoutactivity.class); StartActivity (Intent);The key to the above code is the int

Kotlin Programming related knowledge points : Kotlin programming using IntelliJ IED and understanding Source files (. kt) Kotlin programming and other properties Kotlin programming methods such as using Kotlin programming Kotlin p

Classes and Inheritance class Declaring a class using the keyword class in Kotlin Class Invoice { } A class declaration consists of a class name, a class header (specifying its type parameter, a main constructor, and so on) and a class body surrounded by curly braces. Both the class head and the class body are optional, and if a class does not have a class body, the curly braces can be omitted. Class Empty constructor Function A class in

Developing Android Apps with Kotlin (IV): Custom views and Android extensions @author ASCE1885 's Github book Weibo CSDNOriginal link After reading the extension function and the default value of this article, then what to introduce next? As we said in the first article in this series, Kotlin makes Android easier to develop, and we'll cover it further in this article.Custom ViewAs you recall,

Kotlin Learning Series: Use Cases of object keywords, kotlinobject Object is an important keyword in Kotlin and is not in Java. Objects can be used in the following scenarios: Object Declaration(Object Declaration) Companion object(Companion Object) Object expression(Object Expression) The following describes the meanings, usage, and notes of these keywords, so that you can fully understand the usage of

Kotlin Native introduces Objective-C interoperability and WebAssembly support According to JetBrains Technical Director Nikolay Igotti, Kotlin/Native 0.4 can be used to develop Native applications for iOS and macOS. This version also provides experimental support for the WebAssembly platform. Kotlin/Native supports iOS/macOS development. The key lies in implement

Antonio LeivaTime:Dec,Original link:https://antonioleiva.com/custom-views-android-kotlin/As we read about class articles, you may remember that typically only one constructor is used. This is an issue for creating custom views.The Android framework wants to have multiple constructors that correspond to different create view locations and create view methods (through code, using XML, setting up themes, and so on) so that we cannot ignore this situation

Kotlin is younger than Java, but it is a very promising programming language and its community is growing. Everyone is talking about it and saying it's cool. But why so special.We have prepared a series of articles to share our experience in developing Android applications in Kotlin. We'll discuss the differences between Kotlin and Java in terms of syntax, usabil

Goodbye NullPointerException. Processing of null in Kotlin (KAD 19), kotlinnull By Antonio Leiva Time: Apr 4, 2017 Link: https://antonioleiva.com/nullity-kotlin/ One of the most important parts of Kotlin: It took me a long time to write an article. The creator of Tony Hoare's "null" concept,Billions of errors". When writing Java code, null is the most error-p

When you introduce the basic types in the official documentation for Kotlin, we are told that in some cases the base type is automatically boxed. However, the details of how to do the boxing, and when to do not provide a detailed description. Just provide an example, as follows: Val a:int = 10000 print (a = = = a)//prints ' true ' val boxeda:int? = a val anotherboxeda:int? = a print ( Boxeda = = Anotherboxeda)//!!! Prints ' false '!!!1 2 3 4 5 For the

Kotlin Programming related knowledge points : Kotlin programming using IntelliJ IED and understanding Source files (. kt) Kotlin programming and other properties Kotlin programming methods such as using Kotlin programming Kotlin p