Wiley Amazing Android Apps For Dummies 978-0-470-93629-0 ユーザーズマニュアル

製品コード
978-0-470-93629-0
ページ / 12
1
 
Understanding Android
In mobile device terms, the word Android can refer to either an 
Android device or to the Android operating system. In very simple 
terms, an Android device is any device that runs the Android operat-
ing system. You might also encounter androids from science fiction 
films and books, which are robots that resemble people, but that’s not 
the type of Android I discuss in this book.
You don’t need to understand what Android is or how it works to use 
it. You can simply turn your device on and start pressing buttons and 
tapping icons and you’ll probably get along just fine. That approach 
worked just fine for my 3-year-old daughter; she figured it out pretty 
quickly, much to my dismay. But in case you want a small peek behind 
the Android curtain, this chapter is for you . . .
Introducing the Android 
Operating System
Android is the operating system that powers all Android devices. 
Much like how the Windows operating system powers laptop and 
desktop computers, or Apple’s iOS (formerly known as the iPhone OS) 
powers iPhones and iPads. Think of it as the underlying software that 
instructs your device what to do. When you install an Android app 
onto an Android device, you are installing an app that was written spe-
cifically for the Android operating system. You can’t install a Windows 
app on an Android device, and you can’t install an Android app onto a 
Windows computer.
 
Actually, that last part isn’t exactly true. You actually can install 
Android apps onto a Windows computer — and even on Macs and 
Linux PCs, for that matter — but only if the computer is running a 
special piece of software called an Android emulator, which creates a 
virtual Android device on your computer. Developers frequently use 
such emulators to test their apps.
Speaking of Linux, the Android operating system is actually an offshoot 
of the Linux operating system. Since its inception, however, Android 
has developed into a robust, independent operating system designed 
for mobile devices, and it’s not actually directly compatible with Linux.
Android is an open source operating system, which means that a large 
community of companies and developers maintain it and contribute 
toward developing newer versions of it. This all takes place under the 
auspices of Google, which bought the company (Android, Inc.) that 
04_9780470936290-ch01.indd   6
04_9780470936290-ch01.indd   6
1/19/11   1:44 PM
1/19/11   1:44 PM
COPYRIGHTED MATERIAL