kotlin android tutorial

Antonio LeivaTime:DecOriginal link:http://antonioleiva.com/kotlin-android-extensions/You may be tired of using Findviewbyid to write Android views day after day. Or you might abandon it instead to use the famous Butterknife library. Then you will love Kotlin's Android extension.Kotlin's

implemented by using functions as parameters, some cannot be called syntax, but functions are nested, infix function call,lambda, function parameters, variable argument lists, flexible tags, powerful return, automatic type judgments, Range,iterator, operator overloading, omitting, template ... These are too many features that cause Kotlin's syntax to dazzle, though sometimes it may seem elegant, but it can also cause great difficulty in reading the code.End this article with a piece of code wit

After the Spring Festival, the new "opening". Please continue to support the master. Thank you!Original title: Kotlin Recipes for Android (I): OngloballayoutlistenerOriginal link:http://antonioleiva.com/kotlin-ongloballayoutlistener/Original Antonio Leiva (http://antonioleiva.com/about/)Published in the original: 2016-03-16Kotlin Secret recipe for

Get to know the Swift on the Android platform of Kotlin. The Kotlin syntax is concise and has the characteristics of a series of dynamic languages, Lambda expressions, high-order functions, closures, and even type checks for static languages. The core point is to write the same function, kotlin requires a lot less code

Antonio LeivaTime:Jan,Original link:Https://antonioleiva.com/anko-background-kotlin-android/Anko is an Android library developed by JetBrains with Kotlin, which can be used in many different ways. Its main feature is the use of DSL code to create a view .While this may be interesting, the fact is that I have been using

Antonio LeivaTime:Dec,Original link:https://antonioleiva.com/kotlin-integrations-android-sdk/Using the Kotlin language not only simplifies your code, but it also simplifies calling Java code from Kotlin.How does this work? Simply using some common structure can get a sense of kotlin.In this article, you'll see some examples of how to promote the same code. It als

Attribute delegation of Kotlin: Android assignment (KAD 15) and kotlinandroid without context By Antonio Leiva Time: Mar 9 and 2017 Link: https://antonioleiva.com/property-delegation-kotlin/ As we have read in the previous article, attributes require default values, and attributes cannot be declared without being assigned values. Because you want to store t

Use Anko and Kotlin to implement the dialog box and warning prompt (KAD 24) on Android and ankokotlin By Antonio Leiva Time: Mar 9 and 2017 Link: https://antonioleiva.com/dialogs-android-anko-kotlin/ Using Builder, creating warning prompts and dialog boxes in Android is r

Antonio LeivaTime:Mar 9,Original link:https://antonioleiva.com/dialogs-android-anko-kotlin/with Builder, creating warning tips and dialogs on Android is relatively simple, but because of the complexity of the language, some hints often become very vague. in the in Kotlin, only Lambda Expressions can help us under

for the first time Val Prefs by lazy {context.getsharedpreferences ("Kotlinlearndemo", Context.mode_private)} · Internal are internal modified variables or classes that are visible inside the module.. Inner represents the inner class· init{} is equivalent to a free block in Java init { println ("Initialize") } · inline defines an inline function· · This article Code link: Https://github.com/sunflowerseat/KotlinDemoTemporarily write these, and then add, the content of the article if there

These days have been preparing for the exam, really no time, has passed so long, finally to the object-oriented!Let's see what the Kotlin in the class look like.Can see Kotlin in the class is still very common, mostly similar to Java, the more special are:Each constructor must have an initial value assigned to each member variable.Primary constructor, the head of this constructor is immediately following th

Using Anko and Kotlin to develop databases on Android: SQLite is never an easy task (KAD25). ankokotlin By Antonio Leiva Time: Mar 30,201 7 Link: https://antonioleiva.com/databases-anko-kotlin/ The fact tells us that writing a database in Android is quite boring. When using SQLite, all the required templates are no

Android-kotlin in fragment get ViewoverviewWhen using fragment, Butterknife was used to get the view but it went wrong, and then it was used to get the view directly using the Kotlin import layout, but it was wrong.ReasonThe reason is that the view is called in the Fragment Oncreateview method, which is obviously not possible because the view is not bound to the

own inner classes, such as:Back in the message class, we can see that there are also get and set under the info and what fields, well, this is the getter and setter functions, the general Getter function using the default is good, the setter function is actually at the time of assignment to do some processing, To prevent the setter function from infinitely recursive calls, you can use the $ symbol to access member variables in a class, bypassing getter and setter functions to directly access me

Kotlin's control flow is the same as in other languages, order, branching, loopingThere are two types of branching, if-else and when (similar to switch in Java).If statement:Operation Result:The case statement in Java not only supports integer values, the latest JVM also supports strings, kotlin when statements are more powerful, switch variables can even be various types such as Double,array, in other words when statements are more powerful than swit

　As a result of the recent online search for a lot of Android connection to the HTTP method, but 2013 years ago, the method can not be used now, or error, or abandoned, the years left behind the things can only be sorted by themselves.It's really simple, just a httputil generic class. Can implement get and post method, other things, inside can be arbitrarily changed, basically so.parameter, I used a strurlpath URL, params key-value pair, encode code (

Antonio LeivaTime: Sep 12, 2016Original link: http://antonioleiva.com/recyclerview-diffutil-kotlin/As you know, the "Support Library 24" includes a new, applicable, and convenient class: Diffutil, which allows you to get rid of the boredom and error of cell changes and updates.If you don't know it yet, you can read Nicola Despotoski's good article about it. This article explains how easy it is to handle it.In fact, the Java language introduced many te

Google's official support, experience.XmlXML version= "1.0" encoding= "Utf-8"?>LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Xmlns:app= "Http://schemas.android.com/apk/res-auto"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"android:orientation= "vertical" > TextViewAndroid:id= "@+id/textview"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:text= "Hello world!"

[Original] Development of the first Android Program (Tutorial series), Android tutorial [Personnel oriented]: All Android Developers are determined to start from scratch;[Tutorial description]: The content of this

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