跳到主要內容

【 Android Development for Beginners】 Lesson 3A : Object Oriented Programming - 3

This Notes is according to the udacity free course :

Android Development for Beginners

Lesson 3A : Object Oriented Programming

Resources









What are Java objects




There are 2 easy samples for you to understand what is Java class ?
These are the most important part of this section.





How to create object

1. create object with constructor(regular style)


2. create object with factory methods (need to check out the object documentation)


The quiz focus on too much detail,so I provide the answer for you to check.
TextView textView = new TextView(context);
ImageView img = new ImageView(context);
ToggleButton button = new ToggleButton(context);
Toast toast = Toast.makeText(context, text, duration);


The different between object and class
reference:diffen

class is like a blue map for you to construct object
class can include many state and methods


留言

這個網誌中的熱門文章

【Quora 翻譯&整理】對於程式初學者嘗試解決問題的好網站推薦

原文出處: What are some suggested websites to solve programming problems for beginners? (2016/5/15) 此篇文章強調的是去參加project的那種網站推薦

第一章 電腦、網際網路與全球資訊網簡介

C++  How to Program 7/E 筆記 第一章 電腦、網際網路與全球資訊網簡介 學習目標 基本軟硬體觀念 物件技術觀念(類別、物件、屬性、行為、封裝、繼承) 程式語言的種類 典型的C++開發環境 業界標準物件導向素模語言——UML 沿革 網際網路、球球資訊網與Web 2.0現象的沿革 在Linux 的GNU C++ 與在Microsoft Visual C++環境中測試C++ 應用程式 *結構化程式設計(structured programming) *物件導向程式設計

【Android Development for Beginners】Lesson 2A : Update a Variable in the App

This Notes is according to the udacity free course : Android Development for Beginners The Notes below are my own notes in class. Lesson 2A :  Update a Variable in the App When you put new variable in the MainActivity.java you will get a new results when you press the button"+"