I am writing this article to help myself and others to get a better understanding of thread in Android. Here are some of the topics that will be covered in this article. Table of Content What is a Thread ? Why do we need Thread ? How to create Thread ? Thread and…

參數多型 (Parametric Polymorphism)是一種將類型參數化進而讓程式設計更為彈性的編程概念。 這便是大家所熟知的 Generic (泛型)。 泛型 泛型是 1975年 在 ML (Meta Language) 中推出的程式編寫風格。 泛性的主要特色就是型別 (類型與介面) 的參數化 (Parameterized)。 經由參數化的型別，我 …

在介紹泛型與變型時，我有提到在 Java 與 Kotlin 中他們是如何被定義與使用。這篇我們來談談在 Java 與 Kotlin 中定義變型的時機吧。 如果還不知道什麼事變型 (Variance) 的，歡迎參考泛型基礎的第一篇。 泛型基礎 (一) — Java 與 Kotlin 的變型 參數多型 (Parametric Polymorphism)是一種將類型參數化進而讓程式設計更為彈性的編程概念。 這便是大家所熟知的 Generic (泛型)。medium.com 繼 Java 與 Kotlin 在定義泛型與變型的文章，我們知道他們在如何定義上有所差異： List <T> // J …

Java 5 推出泛型後要如何做到向下相容呢？ 大家會看這篇應該已經了解何謂泛型和變型，以及 Java 與 Kotlin 之間實作泛型的不同吧～ 若還不懂，那就可以看看這兩篇喔 ~ 泛型基礎 (一) — Java 與 Kotlin 的變型 參數多型 (Parametric Polymorphism)是一種將類型參數化進而讓程式設計更為彈性的編程概念。 這便是大家所熟知的 Generic (泛型)。medium.com 泛型基礎 (二) — Java 與 Kotlin 的變型點與 Wildcard 的使用 在介紹泛型與變型時，我有提到在 Java 與 Kotlin 中他們是如何被定義與使用。這篇我們來談談在 Java 與 Kotlin 中定義變型的時機吧。medium.com 在第一篇有提到，在還沒有泛型前，Java 只能用 raw type 來建立物件： List list = new ArrayList(); // raw type

Array vs Iterable — In Kotlin, the Collections Related Class includes : Array Iterable Map Sequence Iterator So what are their differences ? I will spend approximately 2–3 articles on this topic, but in this article, I want to focus on the most asked questions for beginners. 1. What are the differences between Array…

Apparently, there are 4 ways in total — In Journey with Kotlin 002, we talked about how to create a button and how to set an OnClickListener for it. Today, I want to show you other ways to create an OnClickListener. The button we want to apply the OnClickListener is called rollButton . As mentioned in Journey with…

Understand how Activity works — In this article, I want to talk about how Activity works while building a simply Dice Roller app, that generates a random number between 1…6 whenever the button is pressed. To begin, let’s set up an app with Empty Activity called Dice Roller. Next, we are going to take a…

An introduction to Android Studio — This article assumed that you have successfully installed Android Studio and is ready to create your very first app, the classic Hello World. Without any ado, let’s get started. Creating a Project Opening Android Studio When you first open Android Studio, you will be prompted to select what you want to do :

Button in SwiftUI is … very interesting — Button A Button is a control that performs an action when triggered. Although the definition for a button is very straight forward, it is a whole other story when examining its initialize methods …