google android operating system

... физического факультетов. Trang 2OS AndroidRomashko ArtyomSupervision: Chernyakova E.A Trang 3Android (operating system)Android is a Linux-based operating system designed primarily for touchscreen ... for Android, and the estimated number of applications downloaded from Google Play, Android's primary app store, was 25 billion. Android (operating system) Trang 6These factors have allowed Android ... further encouraged a large community of developers and devices which were operating systems. Trang 7Android (operating system)Android had a worldwide smartphone market share of 75% during the third

Ngày tải lên: 05/12/2016, 17:15

... (File System) 4 Quản lý nhập xuất (I/O) 5 Quản lý thiết bị lưu trữ (Secondary-storage) 6 Quản lý mạng (Networking) 7 Hệ thống bảo vệ (Protection System) 8 Hệ thông dịch lệnh (Commander-Intpreter System) ... Trang 1PHẦN 2: HỆ ĐIỀU HÀNH (OPERATING SYSTEM) Chương 1: Tổng quan Hệ điều hành Đáp án 1 Tổ chức, quản lý và phân phối tài nguyên ... (Program execution) 3 Tổ chức và quản lý xuất nhập (I/O operations) 4 Quản lý hệ thống File (File-system manipulation) 5 Truyền tin (Communications) 6 Xác định và xử lý lỗi (Error detection) 7 Các

Ngày tải lên: 19/10/2013, 18:15

... 6 THE OPERATING SYSTEM MACHINE LEVEL Level Operating system machine level Operating system Level Instruction set architecture level Microprogram ... program Win32 program OS/2 program POSIX subsystem Win32 subsystem OS/2 subsystem User mode System interface System services Executive File cache I/O File systems Virtual memory Processes and threads ... program User mode System call interface File system Process management Block cache IPC Scheduling Device drivers Signals Memory mgmt Hardware Figure 6-30 The structure of a typical UNIX system Kernel

Ngày tải lên: 12/12/2013, 09:15

... carry out the basic operating functions Ex: Operating systems, utilities, and drivers ATHENA Trang 5Operating System Overview: What is an Operating system ? © An operating system (QOS) is the ... was developed in 1991 © DOS (Disk Operating System) was developed by Microsoft ATHENA Trang 10Personal Computer Operating Systems © Different operating systems are needed for different computing ... Modeling Statistical ATHENA Trang 7What does an operating system do? Example: 2 The word processing application signals the operating system that a document must be sent | `" printer

Ngày tải lên: 20/01/2014, 22:20

... multithreaded operating system—and a very efficient one Whileprogrammers can explicitly create threads, much of the work of handling threads is taken care of behind the scenes by the operating system ... with thesystem’s ability to assign threads to processors based on the current load on eachprocessor, makes for a system with very high performance Preemptive Multitasking An operating system that ... method of implementing multitasking is for an operating system to employ preemptive multitasking In a preemptive multitasking environ-ment the operating system can, and does, preempt currently running

Ngày tải lên: 26/01/2014, 07:20

... Be kits hold the software that make up much of the BeOS, sothis library is a part of the Be operating system rather than a file included with theBeIDE environment Library filenames will be prefaced ... thought of as one part, or entity, of a program’s graphical user interface For instance, some operating systems make it easy to represent a window or menu as a resource But a resource doesn’t have ... graphical For instance, an application’s signature—a short, Trang 13unique string that helps the operating system differentiate the application from allother applications—is anything but graphical Yet

Ngày tải lên: 26/01/2014, 07:20

... Messages) include BCheckBox, BRadioButton, and BPictureButton Trang 4Storage KitAll operating systems provide file system capabilities—without them, data couldn’t be saved to disk The Storage Kit ... Byimplementing a hook function, your application in essence extends the functional-ity of the Be operating system The system is responsible for calling a hook func-tion, while your application is responsible ... that the system is aware of.You saw an example of a hook function in the SimpleApp example back inChapter 1—the QuitRequested() function When a window’s close button isclicked on, the Be system

Ngày tải lên: 26/01/2014, 07:20

... threecolor components), and because it is a color system with which many program-mers and end users are familiar with (it’s common to several operating systems).The BeOS defines rgb_color as a struct ... of 256 colors A pixel value in the range of 0 to 255 is used as an index into a color map This system color map isidentical for all applications That means that when two programs use thesame ... defining analpha byte, which is used to specify a transparency level for a color Trang 3RGB Color SystemAs listed above, the BeOS supports a number of color spaces The RGB colorspace is popular

Ngày tải lên: 26/01/2014, 07:20

... messages and handle them.For the most part, system messages are handled automatically; for instance, when a B_ZOOM message is received, the operating system zooms the window But youcannot completely ... Application Server delivers a system message to an applicationwindow, that message arrives in the form of a BMessage object Your code deter-mines how to handle a system message simply by overriding ... 10When the program refers to a system message by its Be-defined constant, such asB_QUIT_REQUESTED or B_KEY_DOWN, what’s really of interest is the what datamember of the system message The value of

Ngày tải lên: 26/01/2014, 07:20

... a menu with a single menu item in it Choosing the Beep Once item from the Audio menu sounds the system beep Figure 7-2 The SimpleMenuBar program’s window Trang 7Preparing the window class for ... menubar, menu, and menu item By default, the height of a menubar will be 18 pixels (though the system will matically alter the menubar height to accommodate a large font that’s used to dis-play

Ngày tải lên: 26/01/2014, 07:20

... You’re most familiar with the system message: a message that has a corresponding hook function to which the system passes the message A different type of sage the system recognizes and reacts ... includes a line oftext written in each of the three system fonts.Contradictory as it sounds, the user can change the font that’s used for any of theglobal system fonts Figure 8-2 shows that the FontPanel ... shouldn’t force the user to have a particular non-system font on his or her machine, but it can give the user the option of displaying text in a non-system font Consider a word pro-cessor you’re

Ngày tải lên: 26/01/2014, 07:20

... or make choices The User Interface - Dialog Boxes Trang 19• Some older operating systems, such as DOS (Disk Operating System) and UNIX, use command-line interfaces.• In a command-line interface, ... Information • Multitasking Running Programs Trang 22• The operating system manages all the other programs that run on the PC. • The operating system provides services to programs and the user, including ... a program that performs a task that is not typically handled by the operating system.Some utilities enhance the operating system's Trang 32• Explain how the OS enables users to manage files.•

Ngày tải lên: 16/02/2014, 13:20

... Internetwork Operating System l Router Bootup Process l Router Ports and Interfaces l Routers and the Network Layer Trang 4Routers are Computers l A router is a computer: Ÿ CPU, RAM, ROM, Operating System ... program Ÿ Scaled down version of operating system IOS Ÿ Stores startup configuration (including IP addresses, Routing protocol) l Flash memory - Contains the operating system (Cisco IOS) l Interfaces ... boot system commands in startup-config file (NVRAM) If boot system commands in startup-config a Run boot system commands in order they appear in startup-config to locate the IOS b If boot system

Ngày tải lên: 09/03/2014, 13:20

... implement these programs, you should firstunderstand how to harden a system manually Updating the Operating System An operating system may contain many security vulnerabilities and software bugs ... Trang 1Hardening the Operating System Solutions in this chapter: ■ Updating the Operating System ■ Handling Maintenance Issues ■ Manually Disabling Unnecessary ... provide updates to the operating system to fix thesevulnerabilities and bugs In fact, many consulting firms recommend that companies do notpurchase and implement new operating systems until the first

Ngày tải lên: 19/03/2014, 13:35

... associated operating system group, 2-11 sysdef command, 2-17, 2-18 SYSOPER privilege associated operating system group, 2-11 SYSTEM tablespace, description, 5-11 system file, 2-17, 2-18 System Identifier, ... Solaris, 2-31 Character Set Scanner, 1-16 checking distribution of the operating system, 2-5 checking version of the operating system, 2-5 chmod command, 2-22, 2-25, 2-32 chown command, 2-22, 2-25, ... directories, 2-20 external jobs operating system user required for, 2-12 external redundancy Automatic Storage Management redundancy level, 2-27 extjob executable operating system user required for,

Ngày tải lên: 23/03/2014, 16:20

... steps:a. Create a backup copy of the /etc/system file, for example: # cp /etc/system /etc/system.orig b. Open the /etc/system file in any text editor: # vi /etc/system c. To specify new values for ... installed, then install it See your operating system or software documentation for information about installing packages Trang 163. To determine whether an operating system patch is installed, enter ... directory for that file system 2. From the display, identify either one or two file systems that meet the following requirements: ■ Two file systems: Identify one file system with 2.5 GB of free

Ngày tải lên: 07/04/2014, 15:52

... versions – System V from AT&T ( System III from 82) – 4.2 BSD of Berkeley Uni, Base for many OS: Sun Microsystems (SunOS), Digital (Ultrix)… – XENIX of Microsoft for PC (Compatible with System ... Trang 1UNIX & LINUX Operating SystemThanh-Hai DANG Information Systems Dept -VNUH Email: haidt82@yahoo.com Trang 2“UNIX is user-friendly, ... UNIX International (UI) • The agreement between AT&T and Sun : SVR4 (System V Release 4), The converged Edition of System V and BSD – Open Software Foundation (OSF) • IBM, Digital, HP, Bull,

Ngày tải lên: 09/05/2014, 08:45

... 2: Operating-System StructuresTrang 2Chapter 2: Operating-System StructuresOperating System ServicesUser Operating System InterfaceSystem Calls Types of System CallsSystem Programs Operating System ... ImplementationOperating System Structure Virtual MachinesOperating System GenerationSystem Boot Trang 3To describe the services an operating system provides to users, processes, and other systems To ... ways of structuring an operating system To explain how operating systems are installed and customized and how they boot Trang 4Operating System ServicesOne set of operating-system services provides

Ngày tải lên: 13/05/2014, 00:36

... CHAPTER 3 OPERATING SYSTEM 19 3.1 OPERATING SYSTEM COMPETITION 19 3.2 ANDROID AGAINST OTHER OPEN SOURCE OPERATING SYSTEM 20 Trang 33.2.1 Android vs Symbian 22 3.2.2 Android vs LiMo 24 3.2.3 Android ... Google Android 7 Table 3 Stakeholders of Google Android 17 Table 4 Comparison of Android and Other Open Source Operating System 21 Table 5 Comparison of Android and Proprietary Operating System ... 25 3.2.4 Android vs Maemo 26 3.2.5 Android vs OpenMoko 27 3.3 ANDROID AGAINST PROPRIETARY OPERATING SYSTEM 28 3.3.1 Android vs Research in Motion 30 3.3.1.1 Push API 31 3.3.2 Android vs

Ngày tải lên: 21/05/2014, 21:17

... interfaces import android.widget.*; //Visual UI elements import com.google.android.xmppService.IXmppService; //IXmppService interface //definition file for XMPP service import com.google.android.xmppService.IXmppSession; ... Google Android will be truly released in 2008 with its source code, at this moment Google announced Android SDK together with competition, which provides 10 million dollars in awards for Android ... is an example of AndroidManifest.xml file: 1 <?xml version="1.0" encoding="utf-8"?> 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android" 3 package="dk.mdev.android.hello">

Ngày tải lên: 21/05/2014, 23:26