Android OS (kratak info, uvod i objasnjenja)
Android operativni sustav, odnosno neki ga vole zvati i Google Android OS je operativni sustav baziran na Linux kernelu, odnosno Linux bazi.
Pokrenut je u Google-u a kasnije je predan Open Handset Alijansi na razvoj i koristenje.
Kako je baza Android OS-a Linux, to znaci da je veci dio njegovog koda otvoren za developere kako bi mogli razvijati aplikacije. Nesto slicno se dogodilo sa kodom Symbian OS-a.
Android OS se oslanja na programski jezik Java, te je svo programiranje vrlo slicno Java programskom jeziku. Android OS predstavljen je javnosti prvi puta 05.11.2007. godine kada je Google otvorio Android kod pod Apache licencom.
Zanimljivo je reci da su clanovi Open Handset Alijanse:
Texas Instruments, Broadcom Corporation, Google, HTC, Intel, LG, Marvell Technology Group, Motorola, Nvidia, Qualcomm, Samsung Electronics, Sprint Nextel i T-Mobile.
Specifikacije uredjaja (opcenite) za Android OS (na engleskom jeziku):
Handset layouts
The platform is adaptable to larger, VGA, 2D graphics library, 3D graphics library based on OpenGL ES 1.0 specifications, and traditional smartphone layouts.
Storage
The Database Software SQLite is used for data storage purposes
Connectivity
Android supports connectivity technologies including GSM/EDGE, CDMA, EV-DO, UMTS, Bluetooth, and Wi-Fi.
Messaging
SMS and MMS are available forms of messaging including threaded text messaging.
Web browser
The web browser available in Android is based on the open-source WebKit application framework.
Java support
Software written in Java can be compiled to be executed in the Dalvik virtual machine, which is a specialized VM implementation designed for mobile device use, although not technically a standard Java Virtual Machine.
Media support
Android supports the following audio/video/still media formats: H.263, H.264 (in 3GP or MP4 container), MPEG-4 SP, AMR, AMR-WB (in 3GP container), AAC, HE-AAC (in MP4 or 3GP container), MP3, MIDI, OGG Vorbis, WAV, JPEG, PNG, GIF, BMP.[34]
Additional hardware support
Android can utilize video/still cameras, touchscreens, GPS, accelerometers, magnetometers, accelerated 2D bitblits (with hardware orientation,scaling,pixel format conversion) and accelerated 3D graphics.
Development environment
Includes a device emulator, tools for debugging, memory and performance profiling, a plugin for the Eclipse IDE.
Market
Similar to the App Store on the iPhone OS, the Android Market is a catalog of applications that can be downloaded and installed to target hardware over-the-air, without the use of a PC. Originally only freeware applications were supported. Paid-for apps have been available on the Android
Market in the United States since 19 February 2009.[35]
Multi-touch
Android has native support for multi-touch but the feature is disabled at the kernel level (possibly to avoid infringing Apple patents on touch-screen technology[36]). An unofficial mod has been developed that enables multi-touch, but requires superuser access to the device to flash an unsigned kernel.[37]
Svatko se moze ukljuciti u razvoj aplikacija za Android, za vise informacija predlazem http://developer.android.com/index.html
Ono po cemu se Android OS razlikuje od Windows Mobile-a i Symbiana je po tome sto je puno laksi za developere, odnosno za razvoj besplatnih aplikacija. Uz to, hardverski nije zahtjevan poput Windows Mobile-a, te omogucava izvrstan multitasking.
Prvi Android uredjaj je bio u T-Mobile izdanju, T-Mobile G1, odnosno narucen od strane T-Mobile-a u HTC-u.
Danas imamo mnoge uredjaje, a na nasem trzistu moze se naci HTC Magic, HTC Hero, Samsung Galaxy i drugi..
