ANDROID OPERATING SYSTEM project
description
Transcript of ANDROID OPERATING SYSTEM project
1
A
PROJECT REPORT
ON
ANDROID OPERATING SYSTEM
AT
MOBILE BASED SEARCH ENGINE
(2007-2011)
Chapter-1
1.1 Introduction
Android is an software platform and operating system for mobile devices. It is based on
the Linux kernel. It was developed by Google and later the Open Handset Alliance
(OHA). It allows writing managed code in the Java language. Due to Android here is
the possibility to write applications in other languages and compiling it to ARM native
code. Unveiling of the Android platform was announced on 5 November 2007 with the
founding of OHA.
It's a consortium of several companies
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1.1.1 Introduction to Project Environment
OPERATING SYSTEM:
An operating system (OS) is software consisting of programs and data that runs
on computers and manages computer hardware resources and provides common
services for efficient execution of various application software.
For hardware functions such as input and output and memory allocation, the
operating system acts as an intermediary between application programs and the
computer hardware, although the application code is usually executed directly by the
hardware and will frequently call the OS or be interrupted by it.
Common Features:
Process management
Interrupts
Memory management
File system
Device drivers
Networking (TCP/IP, UDP)
Security (Process/Memory protection)
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Operating systems
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I/o
Types of Operating Systems:
Real-time Operating System:
It is a multitasking operating system that aims at executing real-time
applications. Real-time operating systems often use specialized scheduling algorithms
so that they can achieve a deterministic nature ofbehaviour. The main object of real-
time operating systems is their quick and predictable response to events. They either
have an event-driven or a time-sharing design. An event-driven system switches
between tasks based on their priorities while time-sharing operating systems switch
tasks based on clock interrupts.
Multi-user and Single-user Operating Systems:
The operating systems of this type allow a multiple users to access a computer
system concurrently. Time-sharing system can be classified as multi-user systems as
they enable a multiple user access to a computer through the sharing of time. Single-
user operating systems, as opposed to a multi-user operating system, are usable by a
single user at a time. Being able to have multiple accounts on a Windows operating
system does not make it a multi-user system. Rather, only the network administrator is
the real user. But for a Unix-like operatingsystem, it is possible for two users to login at
a time and this capability of the OS makes it a multi-user operating system.
Multi-tasking and Single-tasking Operating Systems:
When a single program is allowed to run at a time, the system is grouped under
a single-tasking system, while in case the operating system allows the execution of
multiple tasks at one time, it is classified as a multi-tasking operating system. Multi-
tasking can be of two types namely, pre-emptive or co-operative. In pre-emptive
multitasking, the operating system slices the CPU time and dedicates one slot to each of
the programs. Unix-like operating systems such as Solaris and Linux support pre-
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emptive multitasking. Cooperative multitasking is achieved by relying on each process
to give time to the other processes in a defined manner. MS Windows prior to Windows
95 used to support cooperative multitasking.
Distributed Operating System:
An operating system that manages a group of independent computers and makes
them appear to be a single computer is known as a distributed operating system. The
development of networked computers that could be linked and communicate with each
other, gave rise to distributed computing. Distributed computations are carried out on
more than one machine. When computers in a group work in cooperation, they make a
distributed system.
Embedded System:
The operating systems designed for being used in embedded computer systems
are known as embedded operating systems. They are designed to operate on small
machines like PDAs with less autonomy. They are able to operate with a limited
number of resources. They are very compact and extremely efficient by design.
Windows CE and Minix 3 are some examples of embedded operating systems.
Batch Processing Operating System:
In a batch processing operating system interaction between the user and processor is
limited or there is no interaction at all during the execution of work. Data and programs
that need to be processed are bundled and collected as a ‘batch’ and executed together.
Batch processing operating systems are ideal in situations where:
- There are large amounts of data to be processed.
- Similar data needs to be processed.
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- Similar processing is involved when executing the data.
The system is capable of identifying times when the processor is idle at which time
‘batches’
Maybe processed. Processing is all performed automatically without any user
intervention.
History:
In the early 1950s, a computer could execute only one program at a time. Each
user had sole use of the computer and would arrive at a scheduled time with program
and data on punched paper cards and tape. The program would be loaded into the
machine, and the machine would be set to work until the program completed or crashed.
Programs could generally be debugged via a front panel using toggle switches and panel
lights. It is said thatAlan Turing was a master of this on the early Manchester Mark 1
machine, and he was already deriving the primitive conception of an operating system
from the principles of the Universal Turing machine.
Mainframes:
Through the 1950s, many major features were pioneered in the field of operating
systems, including batch processing, multitasking,spooling, runtime libraries, link-
loading, and programs for sorting records in files. These features were included or not
included in application software at the option of application programmers, rather than in
a separate operating system used by all applications. In 1959 the SHARE Operating
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System was released as an integrated utility for the IBM 704, and later in
the 709 and 7090 mainframes.
During the 1960s, IBM's OS/360 introduced the concept of a single OS spanning
an entire product line, which was crucial for the success of the System/360
machines. IBM's current mainframe operating systems are distant descendants of this
original system and applications written for OS/360 can still be run on modern
machines. In the mid-'70s, MVS, a descendant of OS/360, offered the first
implementation of using RAM as a transparent cache for data.
In the late 1960s through the late 1970s, several hardware capabilities evolved
that allowed similar or ported software to run on more than one system. Early systems
had utilized microprogramming to implement features on their systems in order to
permit different underlying architecture to appear to be the same as others in a series. In
fact most 360's after the 360/40 (except the 360/165 and 360/168) were micro
programmed implementations. But soon other means of achieving application
compatibility were proven to be more significant.
The enormous investment in software for these systems made since 1960s
caused most of the original computer manufacturers to continue to develop compatible
operating systems along with the hardware. The notable supported mainframe operating
systems include:
Burroughs MCP – B5000, 1961 to Unisys Clear path/MCP, present.
IBM OS/360 – IBM System/360, 1966 to IBM z/OS, present.
IBM CP-67 – IBM System/360, 1967 to IBM z/VM, present.
UNIVAC EXEC 8 – UNIVAC 1108, 1967, to OS 2200 Unisys Clear path Dorado,
present.
Microcomputers:
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PC-DOS was an early personal computer OS that featured a command line interface.
The first microcomputers did not have the capacity or need for the elaborate
operating systems that had been developed for mainframes and minis; minimalistic
operating systems were developed, often loaded from ROM and known as Monitors.
One notable early disk-based operating system was CP/M, which was supported on
many early microcomputers and was closely imitated in MS-DOS, which became
wildly popular as the operating system chosen for the IBM PC (IBM's version of it was
called IBM DOS or PC DOS), its successors making Microsoft.
Examples of operating systems:
Microsoft Windows
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Windows 7, shown here, is the newest release of Windows.
Microsoft Windows is a family of proprietary operating systems most commonly used
on personal computers. It is the most common family of operating systems for the
personal computer, with about 90% of the market share. Currently, the most widely
used version of the Windows family is Windows XP, released on October 25, 2001.
The newest version is Windows 7 for personal computers and Windows Server 2008
R2 for servers.
Windows is also used on servers, supporting applications such as web
servers and database servers. In recent years, Microsoft has spent significant marketing
and research & development money to demonstrate that Windows is capable of running
any enterprise application, which has resulted in consistent price/performance records
(see the TPC) and significant acceptance in the enterprise market.
Android:
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Android uses Linux for its device drivers, memory management, process management,
and networking.
The next level up contains the Android native libraries. They are all written in C/C++
internally, but you’ll be calling them through Java interfaces. In this layer you can find
the Surface Manager, 2D and 3D graphics, Media codecs, the SQL database (SQLite),
and a native web browser engine (WebKit).
Dalvik Virtual Machine.Dalvik runs dex files, which are coverted at compile time from
standard class and jar files.
Advantages :
There are a host of advantages that Google’s Android will derive from being an open
Source software:
Some of the advantages include:
The ability for anyone to customize the Google Android platform
The consumer will benefit from having a wide range of mobile applications to
choose from since the monopoly will be broken by Google Android
Men will be able to customize a mobile phones using Google Android platform
like never before
Features like weather details, opening screen, live RSS feeds and even the icons on the
opening screen will be able to be customized
As a result of many mobile phones carrying Google Android, companies will
come up with such innovative products like the location
In addition the entertainment functionalities will be taken a notch higher by
Google Android being able to offer online real time multiplayer games
1.1.2Introduction to Databases
Database
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A database is a system intended to organize, store, and retrieve large amounts
of data easily. It consists of an organized collection of data for one or more uses,
typically in digital form. One way of classifying databases involves the type of their
contents, for example: bibliographic, document-text, statistical. Digital databases are
managed using database management systems, which store database contents, allowing
data creation and maintenance, and search and other access.
Architecture:
Database architecture consists of three levels, external, conceptual and internal.
Clearly separating the three levels was a major feature of the relational database
model that dominates 21st century databases.
The external level defines how users understand the organization of the data. A
single database can have any number of views at the external level. The internal level
defines how the data is physically stored and processed by the computing system.
Internal architecture is concerned with cost, performance, scalability and other
operational matters. The conceptual is a level of indirection between internal and
external. It provides a common view of the database that is uncomplicated by details of
how the data is stored or managed, and that can unify the various external views into a
coherent whole.
Database management systems:
A database management system (DBMS) consists of software that operates
databases, providing storage, access, security, backup and other facilities. Database
management systems can be categorized according to the database model that they
support, such as relational or XML, the type(s) of computer they support, such as a
server cluster or a mobile phone, the query language(s) that access the database, such
as SQL or XQuery, performance trade-offs, such as maximum scale or maximum speed
or others. Some DBMS cover more than one entry in these categories, e.g., supporting
multiple query languages. Examples of some commonly used DBMS are MySQL,
PostgreSQL, Microsoft Access, SQLServer, FileMaker, Oracle, Sybase, dBase, Clipper,
FoxPro etc. Almost every database software comes with an Open Database
Connectivity (ODBC) driver that allows the database to integrate with other databases.
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Components of DBMS:
Most DBMS as of 2009 implement a relational model. Other DBMS systems,
such as Object DBMS, offer specific features for more specialized requirements. Their
components are similar, but not identical.
RDBMScomponents:
Sublanguages— Relational DBMS (RDBMS) include Data Definition
Language (DDL) for defining the structure of the database, Data Control
Language (DCL) for defining security/access controls, and Data Manipulation
Language (DML) for querying and updating data.
Interface drivers:-These drivers are code libraries that provide methods to prepare
statements,execute statements, fetch results, etc. Examples
include ODBC, JDBC, MySQL/PHP, FireBird/Python.
SQL engine:-This component interprets and executes the DDL, DCL,
and DML statements. It includes three major components (compiler, optimizer, and
executor).
Transaction engine:-Ensures that multiple SQL statements either succeed or fail as
a group, according to application dictates.
Relational engine:-Relational objects such as Table, Index, and Referential
integrity constraints are implemented in this component.
Storage engine:-This component stores and retrieves data from secondary storage,
as well as managing transaction commit and rollback, backup and recovery, etc.
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ODBMScomponents:
Object DBMS (ODBMS) has transaction and storage components that are
analogous to those in an RDBMS. Some DBMS handle DDL, DML and update tasks
differently. Instead of using sublanguages, they provide APIs for these purposes. They
typically include a sublanguage and accompanying engine for processing queries with
interpretive statements analogous to but not the same as SQL. Example object query
languages are OQL, LINQ, JDOQL, JPAQL and others. The query engine returns
collections of objects instead of relational rows.
Types:
Operational database:
These databases store detailed data about the operations of an organization.
They are typically organized by subject matter, process relatively high volumes of
updates using transactions. Essentially every major organization on earth uses such
databases. Examples include customer databases that record contact, credit, and
demographic information about a business' customers, personnel databases that hold
information such as salary, benefits, skills data about employees, Enterprise resource
planning that record details about product components, parts inventory, and financial
databases that keep track of the organization's money, accounting and financial
dealings.
Data warehouse:
Data warehouses archive modern data from operational databases and often
from external sources such as market research firms. Often operational data undergoes
transformation on its way into the warehouse, getting summarized, anonymized,
reclassified, etc. The warehouse becomes the central source of data for use by managers
and other end-users who may not have access to operational data. For example, sales
data might be aggregated to weekly totals and converted from internal product codes to
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use UPC codes so that it can be compared with ACNielsen data.Some basic and
essential components of data warehousing include retrieving and analyzing data,
transforming,loading and managing data so as to make it available for further use.
Operations in a data warehouse are typically concerned with bulk data
manipulation, and as such, it is unusual and inefficient to target individual rows for
update, insert or delete. Bulk native loaders for input data and bulk SQL passes for
aggregation are the norm.
Analytical database:
Analysts may do their work directly against a data warehouse or create a
separate analytic database for Online Analytical Processing. For example, a company
might extract sales records for analyzing the effectiveness of advertising and other sales
promotions at an aggregate level.
Distributed database:
These are databases of local work-groups and departments at regional offices,
branch offices, manufacturing plants and other work sites. These databases can include
segments of both common operational and common user databases, as well as data
generated and used only at a user’s own site.
End-user database:
These databases consist of data developed by individual end-users. Examples of
these are collections of documents in spreadsheets, word processing and downloaded
files, even managing their personal baseball card collection.
External database:
These databases contain data collected for use across multiple organizations,
either freely or via subscription. The Internet Movie Database is one example.
Hypermedia databases:
The World Wide Web can be thought of as a database, albeit one spread across
millions of independent computing systems. Web browsers "process" this data one page
at a time, while web crawlers and other software provide the equivalent of database
indexes to support search and other activities.
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Models:
Post-relational database models:
Products offering a more general data model than the relational model are
sometimes classified as post-relational Alternate terms include "hybrid database",
"Object-enhanced RDBMS" and others. The data model in such products
incorporates relations but is not constrained by E.F. Codd's Information Principle,
which requires that all information in the database must be cast explicitly in terms of
values in relations and in no other way some of these extensions to the relational model
integrate concepts from technologies that pre-date the relational model. For example,
they allow representation of a directed graph with trees on the nodes.
Some post-relational products extend relational systems with non-relational
features. Others arrived in much the same place by adding relational features to pre-
relational systems. Paradoxically, this allows products that are historically pre-
relational, such as PICK and MUMPS, to make a plausible claim to be post-relational.
Database Developer:
Our Database Programmers are
skilled at designing and developing
software applications with relational
databases. MS SQL Server, MySQL and
Oracle is our specialisation. Our Database
Specialists have worked in diverse fields
like e-commerce applications, internet
banking portals, large community website
with role based access, social networking
applications with multi-server deployment and software architecture designed to
support high loads.We design dynamic websites, e-commerce sites, and a wide
variety of web applications and Internet database solutions for a wide range of
businesses. We take pride in offering quick, effective and inexpensive ecommerce
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database solutions. Our Technical Database Developer team has vast experience in
Database Application Development, setting up and using different databases, from
small and fast MySQL, used for small projects, to huge and efficient Oracle database
servers with complex structure. Our team with strong database management background
and PL SQL programming experience is able to work for your business projects &
ongoing maintenance / development requirements. We provide skilled resources
working offsite, with a variety of experience in Oracle Solutions.
Our skilled team have confident hands & expertise on:-
Oracle
MS SQL Server
My SQL
MS Access
Object database models:
In recent years, the object-oriented paradigm has been applied in areas such as
engineering and spatial databases, telecommunications and in various scientific
domains. The conglomeration of object oriented programming and database technology
led to this new kind of database. These databases attempt to bring the database world
and the application-programming world closer together, in particular by ensuring that
the database uses the same type system as the application program. This aims to avoid
the overhead (sometimes referred to as the impedance mismatch) of converting
information between its representation in the database (for example as rows in tables)
and its representation in the application program (typically as objects). At the same
time, object databases attempt to introduce key ideas of object programming, such
as encapsulation and polymorphism, into the world of databases.
A variety of these ways have been triedfor storing objects in a database. Some
products have approached the problem from the application-programming side, by
making the objects manipulated by the program persistent. This also typically requires
the addition of some kind of query language, since conventional programming
languages do not provide language-level functionality for finding objects based on their
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information content. Othershave attacked the problem from the database end, by
defining an object-oriented data model for the database, and defining a
database programming language that allows full programming capabilities as well as
traditional query facilities.
Storage structures:
Databases may store relational tables/indexes in memory or on hard disk in one of many
forms:
ordered/unordered flat files
ISAM
heaps
hash buckets
logically-blocked files
Fractal Tree indexes
B+ trees
The most commonly usedare B+ trees and ISAM.
Object databases use a range of storage mechanisms. Some use virtual memory-
mapped files to make the native language (C++, Java etc.) objects persistent. This can
be highly efficient but it can make multi-language access more difficult. Others
disassemble objects into fixed- and varying-length components that are then clustered in
fixed sized blocks on disk and reassembled into the appropriate format on either the
client or server address space. Another popular technique involves storing the objects in
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tuples (much like a relational database) which the database server then reassembles into
objects for the client.
Other techniques include clustering by category (such as grouping data by
month, or location), storing pre-computed query results, known as materialized views,
partitioning data by range (e.g., a data range) or by hash.
Memory management and storage topology can be important design choices
for database designers as well. Just as normalization is used to reduce storage
requirements and improve database designs, conversely renormalizations are often used
to reduce join complexity and reduce query execution time.
Indexing:
Indexing is a technique for improving database performance. The many types of
index share the common property that they eliminate the need to examine every entry
when running a query. In large databases, this can reduce query time/cost by orders of
magnitude. The simplest form of index is a sorted list of values that can be searched
using a binary search with an adjacent reference to the location of the entry, analogous
to the index in the back of a book. The same data can have multiple indexes (an
employee database could be indexed by last name and hire date.)
Indexes affect performance, but not results. Database designers can add or
remove indexes without changing application logic, reducing maintenance costs as the
database grows and database usage evolves.
CHAPTER 2
SOFTWARE AND HARDWARE REQUIREMENTS
The selection of hardware is very important in the existence and proper working of any
software. When selecting hardware, the size and requirements are also important.
2.1 HARDWARE REQUIREMENTS
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Processor : INTEL Pentium 4
RAM : 512MB
Hard Disk Drive : 40GB
Mobile : Android Mobile
2.2 SOFTWARE REQUIREMENTS
Operating system : WindowsXp or any latest version of windowsWeb Browser : Mozilla Firefox or any browserFront- End : PHP, Flex
Back- End : MS SQL SERVER 2008 EXPRESS
Project will be done in PHP,Flex as front end and MySQL as back end.
Php is a Hypertext Preprocessor (a recursive acronym, originally personal home page)
is a general-purpose scripting language that was originally designed for web
development to produce dynamic web pages. For this purpose, PHP code is embedded
into the HTML source document and interpreted by a web server with a PHP processor
module, which generates the web page document. As a general-purpose programming
language, PHP code is processed by an interpreter application in command-line mode
performing desired operating system operations and producing program output on its
standard output channel. It may also function as a graphical application. PHP is
available as a processor for most modern web servers and as a standalone interpreter on
most operating systems and computing platforms. Flex is used to show the front-end
screens on the mobile based on the inputs provided by PHP
CHAPTER-3
3 Literature Survey/Review of Literature
3.1 Introduction to Technologies
Technology is the usage and knowledge of tools, techniques, crafts, systems or methods
of organization in order to solve a problem or serve some purpose. The
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word technology comes from the Greek technological — téchnē an "art", "skill" or
"craft" and -logia the study of something, or the branch of knowledge of a
discipline. The term can either be applied generally or to specific areas: examples
include construction technology, medical technology, and information technology.
3.1.1 JAVA:
Java technology is an object-oriented, platform-independent, multithreaded
programming environment.
Java technology is both a programming language and a platform.
The Java programming language is a high-level language that can be
characterized by all of the following buzzwords:
Simple Architecture neutral
Object oriented Portable
Distributed High performance
Multithreaded Robust
Dynamic Secure
Java is a programming language originally developed by James Gosling at Sun
Microsystems (which is now a subsidiary of Oracle Corporation) and released in 1995
as a core component of Sun Microsystems' Java platform. The language derives much
of its syntax from C and C++ but has a simpler object model and fewer low-
level facilities. Java applications are typically compiled tobytecode (class file) that can
run on any Java Virtual Machine (JVM) regardless of computer architecture. Java is a
general-purpose, concurrent, class-based, object-oriented language that is specifically
designed to have as few implementation dependencies as possible. It is intended to let
application developers "write once, run anywhere". Java is currently one of the most
popular programming languages in use, and is widely used from application software to
web applications.
Automatic memory management:
Java uses an automatic garbage collector to manage memory in the object lifecycle. The
programmer determines when objects are created, and the Java runtime is responsible
for recovering the memory once objects are no longer in use. Once no references to an
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object remain, the unreachable memory becomes eligible to be freed automatically by
the garbage collector. Something similar to a memory leak may still occur if a
programmer's code holds a reference to an object that is no longer needed, typically
when objects that are no longer needed are stored in containers that are still in use. If
methods for a nonexistent object are called, a "null pointer exception" is thrown.
Syntax:
The syntax of Java is largely derived from C++. Unlike C++, which combines the
syntax for structured, generic, and object-oriented programming, Java was built almost
exclusively as an object-oriented language. All code is written inside a class, and
everything is an object, with the exception of the primitive data types (integers,
floating-point numbers, boolean values, and characters), which are not classes for
performance reasons.
Java uses similar commenting methods to C++. There are three different styles of
comment: a single line style marked with two slashes (//), a multiple line style opened
with a slash asterisk (/*) and closed with an asterisk slash (*/), and
theJavadoc commenting style opened with a slash and two asterisks (/**) and closed
with an asterisk slash (*/). The Javadoc style of commenting allows the user to run the
Javadoc executable to compile documentation for the program.
Example:
publicclassHelloWorld
{
publicstaticvoid main(String[] args)
{
System.out.println("Hello, world!");
}
}
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Editions:
Sun has defined and supports four editions of Java targeting different application
environments and segmented many of its APIs so that they belong to one of the
platforms. The platforms are:
Java Card for smartcards.
Java Platform, Micro Edition (Java ME) — targeting environments with limited
resources.
Java Platform, Standard Edition (Java SE) — targeting workstation environments.
Java Platform, Enterprise Edition (Java EE) — targeting large distributed enterprise
or Internet environment.
3.1.2 XML:
Extensible Markup Language (XML) is a set of rules for encoding documents
in machine-readable form. It is defined in the XML 1.0 Specification produced
by the W3C, and several other related specifications, all gratis open standards.
XML's design goals emphasize simplicity, generality, and usability over
the Internet. It is a textual data format with strong support via Unicode for the
languages of the world. Although the design of XML focuses on documents, it is
widely used for the representation of arbitrary data structures, for example
in web services.
Key terminology:
The material in this section is based on the XML Specification. This is not an
exhaustive list of all the constructs which appear in XML; it provides an
introduction to the key constructs most often encountered in day-to-day use.
Character:
By definition, an XML document is a string of characters. Almost every
legal Unicode character may appear in an XML document.
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Processor and Application:
The processor analyzes the markup and passes structured information to an application.
The specification places requirements on what an XML processor must do and not do,
but the application is outside its scope. The processor (as the specification calls it) is
often referred to colloquially as an XML parser.
Markup and Content:
The characters which make up an XML document are divided into markup and content.
Markup and content may be distinguished by the application of simple syntactic rules.
All strings which constitute markup either begin with the character "<" and end with a
">", or begin with the character "&" and end with a ";". Strings of characters which are
not markup are content.
Tag:
A markup construct that begins with "<" and ends with ">". Tags come in three
flavors: start-tags, for example <section>, end-tags, for example </section>,
and empty-element tags, for example <line-break />.
Element:
A logical component of a document which either begins with a start-tag and ends with a
matching end-tag, or consists only of an empty-element tag. The characters between the
start- and end-tags, if any, are theelement's content, and may contain markup, including
other elements, which are called child elements. An example for child elemen
is <Greeting>Hello, world.</Greeting> Another is <line-break />.
Attribute:
A markup construct consisting of a name/value pair that exists within a start-tag or
empty-tag element tag.In the example (belowthe element img has two
attributes, src and alt:<img src="madonna.jpg" alt='Foligno Madonna, by Raphael' />.
Another example would be <step number="3">Connect A to B.</step> where the name
of the attribute is "number" and the value is "3".
XML Declaration:
XML documents may begin by declaring some information about themselves, as in the
following example.
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<? xmlversion="1.0"encoding="UTF-8"?>
3.1.3 HTML:
HTML, which stands for HyperText Markup Language, is the predominant markup
language for web pages. HTML is the basic building-blocks of webpages.
HTML stands for Hyper Text Markup Language
HTML is not a programming language, it is a markup language
A markup language is a set of markup tags
HTML uses markup tags to describe web pages
The purpose of a web browser is to read HTML documents and compose them into
visual or audible web pages. The browser does not display the HTML tags, but uses the
tags to interpret the content of the page.
HTML elements form the building blocks of all websites. HTML
allows images and objects to be embedded and can be used tocreate interactive forms. It
provides a means to create structured documents by denoting structural semantics for
text such as headings, paragraphs, lists, links, quotes and other items. It can
embed scripts in languages such as JavaScript which affect the behavior of HTML
webpages.
Web browsers can also refer to Cascading Style Sheets (CSS) to define the
appearance and layout of text and other material. The W3C, maintainer of both the
HTML and the CSS standards, encourages the use of CSS over explicitly presentational
HTML markup consists of a series of short codes typed into a text-file by the site author
— these are the tags. The text is then saved as a html file, and viewed through
a browser, like Internet Explorer or Netscape Navigator.
This browser reads the file and translates the text into a visible form, hopefully
rendering the page as the author had intended. Writing your own HTML entails using
tags correctly to create your vision. You can use anything from a rudimentary text-
editor to a powerful graphical editor to create HTML pages.
HTML Tags:
HTML markup tags are usually called HTML tags
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HTML tags are keywords surrounded by angle brackets like <html>
HTML tags normally come in pairs like <b> and </b>
The first tag in a pair is the start tag, the second tag is the end tag
Start and end tags are also called opening tags and closing tags
Markup:
HTML markup consists of several key components, including elements (and
their attributes), character-based data types, character references and entity references.
Another important component is the document type declaration, which
triggers standards mode rendering.
<! doctype html>
<html>
<head>
<title>Hello HTML</title>
</head>
<body>
<p>Hello World!</p>
</body></html>
Elements
HTML documents are composed entirely of HTML elements that, in their most
general form have three components: a pair of element tags, a "start tag" and "end tag";
some element attributes within the start tag; and finally, any textual and
graphical content between the start and end tags. The HTML element is everything
between and including the tags. Each tag is enclosed in angle brackets.
The general form of an HTML element is therefore: <tag attribute1="value1"
attribute2="value2">content to be rendered</tag>
3.1.4 MySQL:
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Developer(s)MySQL AB (A subsidiary
of Oracle)
Initial release May 23, 1995
Stable release5.5.9 (February 7, 2011; 33
days ago) [+/−]
Preview release [+/−]
Written in C, C++
Operating
systemCross-platform
Available in English
Type RDBMS
License GNUGeneral Public License
MySQL is a relational database management system (RDBMS) that runs as a
server providing multi-user access to a number of databases. It is named after developer
Michael Widenius' daughter, my. The SQL phrase stands for Structured Query
Language.
The MySQL development project has made its source code available under the
terms of the GNU General Public License, as well as under a variety of proprietary
agreements. MySQL was owned and sponsored by a single for-profit firm, the Swedish
company MySQL AB, now owned by Oracle Corporation.
Free-software projects that require a full-featured database management system
often use MySQL. For commercial use, several paid editions are available, and offer
additional functionality. Some free software project examples: Joomla, WordPress,
MyBB, phpBB, Drupal and other software built on the LAMP software stack. MySQL
is also used in many high-profile, large-scale World Wide Web products, including
Wikipedia, Google and Face book.
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Uses:
MySQL is a popular choice of database for use in web applications, and is a central
component of the widely used LAMP web application software stack—LAMP is an
acronym for "Linux, Apache, MySQL, Perl/PHP/Python".
MySQL is used in some of the most frequently visited web sites on the Internet,
including Flicker,Nokia.com, YouTube and as previously mentioned; Wikipedia,
Google and Face book.
Platforms and interfaces:
MySQL is written in C and C++. Its SQL parser is written in yacc, and a home-
brewed lexical analyzer named sql_lex.cc.
MySQL works on many different system platforms, including AIX, BSDi,
FreeBSD, HP-UX, eComStation, i5/OS, IRIX, Linux, Mac OS X, Microsoft Windows,
NetBSD, Novell NetWare, OpenBSD, OpenSolaris, OS/2 Warp, QNX, Solaris,
Symbian, SunOS, SCO OpenServer, SCO UnixWare, Sanos and Tru64. A port of
MySQL to OpenVMS also exists.
Many programming languages with language-specific APIs include libraries for
accessing MySQL databases. These include MySQL Connector/Net for integration with
Microsoft's Visual Studio (languages such as C# and VB are most commonly used) and
the ODBC driver for Java. In addition, an ODBC interface called MyODBC allows
additional programming languages that support the ODBC interface to communicate
with a MySQL database, such as ASP or ColdFusion. The HTSQL - URL based query
method also ships with a MySQL adapter, allowing direct interaction between a
MySQL database and any web client via structured URLs. The MySQL server and
official libraries are mostly implemented in ANSI C/ANSI C++.
Features:
For storing historical data in little space)
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Transactions with the InnoDB, BDB and Cluster storage engines; save points
with InnoDBSSL support As of April 2009, MySQL offered MySQL 5.1 in two
different variants: the open source MySQL Community Server and the
commercial Enterprise Server. MySQL 5.5 is offered under the same licences.
They have a common code base and include the following features:
A broad subset of ANSI SQL 99, as well as extensions
Cross-platform support
Stored procedures
Triggers
Cursors
Updatable Views
True Varchar support
Information schema
Strict mode
X/Open XA distributed transaction processing (DTP) support; two phase commit
as part of this, using Oracle's InnoDB engine
Independent storage engines (MyISAM for read speed, InnoDB for transactions
and referential integrity, MySQL Archive
Query caching
Sub-SELECTs (i.e. nested SELECTs)
Replication support (i.e. Master-Master Replication & Master-Slave
Replication) with one master per slave, many slaves per master, no automatic
support for multiple masters per slave.
Full-text indexing and searching using MyISAM engine
Embedded database library
3.1.5 PHP:
Hypertext Pre-processor (a recursive acronym, originally personal home page)
is a general-purpose scripting language that was originally designed for web
development to produce dynamic web pages. For this purpose, PHP code is embedded
into the HTML source document and interpreted by a web server with a PHP processor
module, which generates the web page document. As a general-purpose programming
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language, PHP code is processed byan interpreter application in command-line mode
performing desired operating system operations and producing program output on its
standard output channel. It may also function as a graphical application. PHP is
available as a processor for most modern web servers and as a standalone interpreter on
most operating systems and computing platforms.
Usage:
</body>
</html> PHP is a general-purpose scripting language that is especially suited to server-
side web development where PHP generally runs on a web server. Any PHP code in a
requested file is executed by the PHP runtime, usually to create dynamic web
pagecontent. It can also be used for command-line scripting and client-
side GUI applications. PHP can be deployed on most web servers, many operating
systems and platforms, and can be used with many relational database management
systems (RDBMS). It is available free of charge, and the PHP Group provides the
complete source code for users to build, customize and extend for their own use.
Originally designed to create dynamic web pages, PHP now focuses mainly on
server-side scripting, and it is similar to other server-side scripting languages that
provide dynamic content from a web server to a client, such as Microsoft's Asp.net, Sun
Microsystems' Java Server Pages, and mod_perl. PHP has also attracted the
development of many frameworks that provide building blocks and a design structure to
promote rapid application development (RAD).
Syntax :
Main article: PHP syntax and semantics
<!DOCTYPE html>
<html>
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<head>
<meta charset="utf-8" />
<title>PHP Test</title>
</head>
<body>
<?php
echo 'Hello World';
?
3.1.6Adobe Flex
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Adobe Flex is a software development kit (SDK) released by Adobe Systems for the
development and deployment of cross-platform rich Internet applications based on the
Adobe Flash platform. Flex applications can be written using Adobe Flash Builder or by
using the freely available Flex compiler from Adobe.
The release in March 2004 by Macromedia included an SDK, an integrated
development environment (IDE), and a Java EE integration application known as Flex
Data Services. Since Adobe purchased Macromedia in 2005, subsequent releases of
Flex no longer require a license for Flex Data Services, which has become a separate
product rebranded as Lifecycle Data Services.
Adobe Flash Builder offers built-in code editors for MXML and Action Script
and a WYSIWYG editor for modifying MXML applications. Adobe Flash Builder
includes an interactive debugger allowing developers to step through code execution
while inspecting variables and watching expressions. Flex Builder 3 added support for
performanceanalysis. The profiling view displays statistical information about memory
use in addition to function call execution time.
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Application Development Process
Define an application interface using a set of pre-defined components (forms,
buttons, and so on)
Arrange components into a user interface design
Use styles and themes to define the visual design
Add dynamic behavior (one part of the application interacting with another, for
example)
Define and connect to data services as needed
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Chapter-4
Software Requirement Analysis
4.1 DEFINITION:
System Analysis is the detailed study of the various operations performed by the system
and their relationships within and outside the system. Analysis is the process of
breaking something into its parts so that the whole may be understood. System analysis
is concerned with becoming aware of the problem, identifying the relevant and most
decisional variables, analysing and synthesizing the various factors and determining an
optimal or at least a satisfactory solution. During this a problem is identified, alternate
system solutions are studied and recommendations are made about committing the
resources used to design the system.
4.1.1 CurrentSystem:
Traditional studies on the reliability of software focus on functional failures, and do
not emphasize the time-related behaviour of systems that can also cause the software to
fail. The ability to meet deadlines and time constraints is critical to embedded systems
software (as in automotive or robotic applications) that mandate response to stimuli
within respecified real-time design specifications, and reliability considerations require
a detailed evaluation of the ability of the system to meet these specifications.
4.1.2 Proposed system
If there is one area of certain growth in these troubled economic times, it is the mobile
communications sector. And with significant improvements having emerged over the
last few years in vital areas such as data transfer speed, screens and content, mobile
devices are starting to challenge the PC as an Internet access device of choice. This in
turn has raised a key issue in the Mobile Internet space: that of the optimization of sites
for mobile devices and search engines.
It's all very well delivering a repackaged version of a standard web site to mobile
devices, and most of the presentational challenges this raises have been addressed one
way or another. But the fact remains that mobile Internet usage diverges from
traditional usage in a number of important ways. The failure of content publishers to
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understand the implications of these differences for content can only lead to sub-
standard mobile sites that run the risk of providing irrelevant material and poor
usability. This in turn results in an impoverished mobile Internet experience for users,
which impacts take-up and slows down the whole cycle.
It is clearly very much in the interests of content publishers to optimize their sites not
just for the mobile user, but also the mobile search engine. This is particularly important
when the site contains information of particular relevance to the mobile sector.
Mobile Searching is different
The first thing developers need to bear in mind is that there are real differences in the
way mobile users tend to search compared with standard desktop-based searching. For
example, there are differences in the type of content that mobile users tend to seek out.
This content is far more likely to involve an area that fulfills some immediate
requirement, such as music or a ringtone, a navigational query, or an entertainment-
related question.
In fact, research has suggested that around 50% of search queries from mobile phones
tend to fall into just seven key categories: the above three, plus sports, local knowledge,
shopping, and reference. Clearly any publisher who deals in one or more of these kinds
of data - probably most of them - needs to consider the likelihood that a significant
proportion of the site's potential audience could be mobile-based and optimize
accordingly.
Another limiting factor that developers should consider is the impact of the form factor
of a typical mobile device on how it is used. This can express itself in any number of
ways; for example, it is common knowledge that few users navigate beyond the first
couple of pages of search results for any given query. If they haven't found what they
are looking for by the end of page two they will tend to rephrase the query and start
over.
In a standard desktop search environment, which typically returns ten or so results per
page, this means that while a front page search ranking is preferable, a top twenty
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ranking is generally regarded as satisfactory. On a mobile device with its tiny screen,
two pages might only include eight search results. This puts an additional premium on
search engine ranking for which webmasters need to account.
A third point to consider is that mobile search queries tend to be extremely short,
containing fewer keywords on average than their desktop-based counterparts. Data
provided by Massachusetts-based mobile search solution provider JumpTap suggests
that the average desktop search contains something between two and three keywords,
whereas less than 15% of all searches carried out from mobile devices contain more
than two keywords. The onus is on publishers to take account of this by ensuring their
content is highly focused, relevant, and preferably identifiable by a single keyword.
4.1.3 Feasibility studies:
A feasibility study describes whether or not the proposed system is worthwhile
A short focused study that checks
If the system contributes to organizational objectives. If the system can be engineered using technology and within budget. If the system can be integrated with other systems that are used.
Facts considered in the feasibility analysis were.
Technical Feasibility
Economic Feasibility
Behavioural Feasibility
Technology and system feasibility
The assessment is based on an outline design of system requirements in terms of Input,
Processes, Output, Fields, Programs, and Procedures. This can be quantified in terms of
volumes of data, trends, frequency of updating, etc. in order to estimate whether the
new system will perform adequately or not. Considering our project if is technically
feasible. Mobile based search Engine App using Android which is a latest idea and the
mobile applications here are developed in the Adobe flash builder burrito which
contains all SDK’s of the Android OS and supports android applications. This software
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is technically well and high in performance. It has got many features like buttons,
layouts, designs etc.,
Economic feasibility:
Economic analysis is the most frequently used method for evaluating the effectiveness
of a new system. More commonly known as cost/benefit analysis, the procedure is to
determine the benefits and savings that are expected from a candidate system and
compare them with costs. If benefits outweigh costs, then the decision is made to design
and implement the system. Considering our project the android is one of the best
operating system in mobile phones used to develop the applications which runs on the
mobile platform, which serves people a good scope of development in the software field
and also it attracts the users. Android mobiles weigh low cost then i-Phones and other
mobile operating system. Low cost easy access to the internet with search engine App’s
and fast fetching results now within your mobile.
Operational feasibility
Operational feasibility is a measure of how well a proposed system solves the problems,
and takes advantage of the opportunities identified during scope definition and how it
satisfies the requirements identified in the requirements analysis phase of system
development. Proposed system here is being developed in the Adobe Flash Builder
Burrito which is the latest version of Adobe which supports android applications.
Adobe Flash Builder (previously known as Adobe Flex Builder) is an integrated
development environment (IDE) built on the Eclipse platform and speeds development
of rich Internet applications (RIAs) and platform desktop, particularly for the Adobe Flash
platform. Adobe Flash Builder offers built-in code editors for MXML and Action Script
and a WYSIWYG editor for modifying MXML applications. Adobe Flash Builder
includes an interactive debugger allowing developers to step through code execution
while inspecting variables and watching expressions. Flex Builder 3 added support for
performance analysis.
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4.1.4 MODULES
USER MODULE
This module will maintain all the users using this application. Generally there are two
types of user.
Users
Administrator
SEARCH MODULE
A. Integrate global (web) search into your application.
b. Enable your application
c. Tie into the quick search box
DATABASE MODULES
This module maintains the list of files uploaded by the user. Administrator can remove
any file that on complain from any user.
4.2.1 Search Engine:
A web search engine is designed to search for information on the World Wide Web and
FTP servers. The search results are generally presented in a list of results and are often
called hits. The information may consist of web pages, images, information and other
types of files. Some search engines also mine data available in databases or open
directories. Unlike web directories, which are maintained by human editors, search
engines operate algorithmically or are a mixture of algorithmic and human input.
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Crawler Architecture:
High-level architecture of a standard Web crawler
A Web crawler is a computer program that browses the World Wide Web in a
methodical, automated manner or in an orderly fashion. Other terms for Web crawlers
are ants, automatic indexers, bots, Web spiders, Web robots, or—especially in the
FOAF community—Web scutters.
This process is called Web crawling or spidering. Many sites, in particular
search engines, use spidering as a means of providing up-to-date data. Web crawlers are
mainly usedto create a copy of all the visited pages for later processing by a search
engine that will index the downloaded pages to provide fast searches. Crawlers can also
be used for automating maintenance tasks on a Web site, such as checking links or
validating HTML code.
Focused crawling:
The importance of a page for a crawler can also be expressed as a function of the
similarity of a page to a given query. Web crawlers that attempt to download pages that
are similar to each other are called focused crawler or topical crawlers. The concepts of
topical and focused crawling were first introduced by Menczer and by Chakrabarti.
The main problem in focused crawling is that in the context of a Web crawler,
we would like to be able to predict the similarity of the text of a given page to the query
before actually downloading the page. A possible predictor is the anchor text of links;
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this was the approach taken by Pinkerton in a crawler developed in the early days of the
Web.
Propose to use the complete content of the pages already visited to infer the
similarity between the driving query and the pages that have not been visited yet. The
performance of a focused crawling depends mostly on the richness of links in the
specific topic being searched, and a focused crawling usually relies on a general Web
search engine for providing starting points.
URL normalization
Crawlers usually perform some type of URL normalization in order to avoid crawling
the same resource more than once. The term URL normalization, also called URL
canonicalization, refers to the process of modifying and standardizing a URL in a
consistent manner. There are several types of normalization that may be performed
including conversion of URLs to lowercase, removal of "." and ".." segments, and
adding trailing slashes to the non-empty path component.
Parallelization policy
A parallel crawler is a crawler that runs multiple processes in parallel. The goal
is to maximize the download rate while minimizing the overhead from parallelization
and to avoid repeated downloads of the same page. To avoid downloading the same
page more than once, the crawling system requires a policy for assigning the new URLs
discovered during the crawling process, as the same URL can be found by two different
crawling processes.
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4.3Search Engine Optimization
Search engine optimization (SEO) is the process of improving the visibility of a
website or a web page in search engines via the "natural" or Un-paid ("organic"
or "algorithmic") search results. Other forms of search engine marketing (SEM)
target paid listings.
In general, the earlier (or higher on the page), and more frequently a site
appears in the search results list, the more visitors it will receive from the search
engine's users. SEO may target
different kinds of search, including image search, local search, video search,
news search and industry-specific vertical search engines. This gives a website
web presence.
As an Internet marketing strategy, SEO considers how search engines work,
what people search for, the actual search terms typed into search engines and
which search engines are preferred by their targeted audience. Optimizing a
website may involve editing its content and HTML and associated coding to
both increase its relevance to specific keywords and to remove barriers to the
indexing activities of search engines. Promoting a site to increase the number of
backlinks, or inbound links, is another SEO tactic.
The initialism "SEO" can refer to "search engine optimizers," a term adopted by
an industry of consultants who carry out optimization projects on behalf of
clients, and by employees who perform SEO services in-house. Search engine
optimizers may offer SEO as a stand-alone service or as a part of a broader
marketing campaign. Because effective SEO may require changes to the HTML
source code of a site and site content, SEO tactics may be incorporated into
website development and design.
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4.4 Mobile Search Engine
Mobile search is an evolving branch of information retrieval services that is
centered on the convergence of mobile platforms and mobile phones and other
mobile devices. Web search engine ability in a mobile form allows users to find
mobile content on websites which are available to mobile devices on mobile
networks.
FIG 4.4
As this happens mobile content shows a media shift toward mobile multimedia.
Simply put, mobile search is not just a spatial shift of PC web search to mobile
equipment, but is witnessing more of treelike branching into specialized
segments of mobile broadband and mobile content, both of which show a fast-
paced evolution.
4.4.1 Types of mobile search
Mobile optimized search engines - Most major search engines have implemented a
mobile optimized version of their products that take into consideration bandwidth and
form factor limitations of the mobile platform.
Mobile question and answer services - These services allow a user to text a question
to a central database and receive a reply using text. A usage example would be a user
that wants to know the answer to a very specific question but is not in front of his/her
computer.
Mobile navigation services - These services provide the indexing structure to the
portals provided by mobile operators. They index the content already on the operators'
portal but alsoprovideusers access to mobile specific content that is available outside the
confines of the portal.
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Mobile directory search - This service is known by different names dependent on
country and operator. It can also be known as 'Find My Nearest' or 'Mobile Yellow
Pages' services. The basics of the services allow users to find local services in the
vicinity of their current location.
Dynamic Mobile Selection Interface Services - A new category of mobile search tool
that is emerging is one in which a pre-selected set of possible search content is
downloaded in advance by a mobile user and then allows for a final internet search step.
FIG 4.4.1
4.4.2 Top 5 mobile search engines:
Google Mobile:
It starts out a bit confusing: When you first come to Google Mobile, you find no search
box. Instead, Google pushes apps and a huge number of services. Click “Web” for web
search.
The search results are based on the principle of universal search: You get
images, news, maps and more, depending on your query.
Taptu:
Taptu is not as advanced as Google, but in most cases, it will provide just what you
need. This is a service that is tailored specifically for touch screens and it does a great
job at simplifying web search on touch phones.
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Yahoo! Mobile:
Yahoo! Mobile offers much of the tools Google Mobile does (there is no speech search,
though). In addition, there is a list of hot topics on the front page and easy access to turn
on and off safe search.
Bing Mobile:
Bing Mobile has a smart design which makes searching easy: There are quick links to
directions, maps, weather and movies on the front page. The search results are not
universal (like Google and Taptu), but tabs provide easy access to results in the
categories videos, images and news.
Ask Mobile:
I am generally a big fan of Ask, but Ask Mobile is not too impressive. The front page
has convenient quick links to web, images, news, local and maps & directions. The
search results are easy to navigate.
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CHAPTER-5
5.1 E-R Schema
FIG 5.1
Here is the backend schema, which contains the tables which we are using in the
database. The data will be added in the data and will be arranged in the tables. Here we
are using PHPMYADMIN to create our database. This usually gives access from
Xamppwhich acts as a server in the local host. Our database name here is
“mobilesearchengine”.
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FIG 5.1.1
Here the admin has “HAS A” relation with the users, organization, jobs. These tables
contain their respective fields.
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5.2 UML diagrams
5.2.1 USE CASE DIAGRAM
Use case diagrams are central to modeling the behavior of a system, a sub-system, or a
class. Each one shows a set of use cases, actors and their relationships. In the below
diagram we there are two actors (user and administrator) and 8 use case. The
relationship between actor and the case is association. Here the user is associated with 7
cases and the administrator is associated with 5 cases.
FIG:5.2.1 USE CASE DIAGRAM
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FIG 5.2.1 USE CASE DIAGRAM
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5.2.2 CLASS DIAGRAM
A class diagram shows a set of classes, interfaces, collaborations and their relationships.
In this application there are 5 main classes (application, user, administrator and
services). All the classes specify their attributes and operations and their relationship
with other classes. Application class has association relationship with user and
administrator, this mean user and administrator are related to application class because
they use it. Services class is part of application class so they relationship is aggregation
(“has-a”).
FIG 5.2.2 CLASS DIAGRAM
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5.2.3OBJECT DIAGRAM
An Object diagram focuses on some particular set of object instances and attributes,
and the links between the instances. Here there are four objects application, services,
user and administrator. Services are a part of application so users who are connected to
application are finally using the services. Therefore user and administrator are
connected to the services object.
FIG .5.2.3 OBJECT DIAGRAM
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5.2.4 SEQUENCE DIAGRAM
A sequence diagram emphasizes the time ordering of the messages. In the below
diagram it is shown that any new user has to register/ login with the website, then only
they can use services (like SMS, upload, download) of the website. They have to
register for alerts at the website and then the administrator can send alerts to them
regularly. They can contact the admin and can expect a reply to their message. On the
other had the admin can view users delete them, monitor the files being uploaded,
basically the admin has full access to the website. After using the services provided by
the website, the user can logout.
FIG 5.2.4 SEQUENTIAL DIAGRAM
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5.2.5COLLABORATION DIAGRAM
A collaboration diagram describes interactions among objects in terms of sequenced
messages. Here collaboration diagram is another representation of sequence diagram. In
the below diagram arrows represent the functions provided by one object to another.
FIG 5.2.5 COLLABORATION DIAGRAM
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5.2.6 CONTROL FLOW DIAGRAM
Activity diagrams are graphical representations of workflows of stepwise activities and
actions with support for choice, iteration and concurrency. In this system user first
registers/log in but this will be validated by the application. Before display any profile
to the user the application will check the credentials once again. User has to user the
application to send messages to mobile phones. The user has to subscribe for alerts for
receiving alerts from the website (which will be sent from the admin of the website).
Any changes in user data will be processed by the application and finally the user can
Logout from the page
FIG 5.2.6 CONTROL FLOW DIAGRAM
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5.3 TABLE SPECIFICATION
Table Name: Admin
Field name Data type Size
Username Varchar 50
Password Varchar 10
Table Name: Users
Field Name Data type Size
User_id Varchar 50
Name Varchar 50
Email_id Varchar 50
password Varchar 50
Gender Varchar 50
Qualification Varchar 50
Experience Varchar 50
Salary Varchar 50
Current_organization Varchar 50
Current_location Varchar 50
Image Varchar 50
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Table Name: jobs
Field Name Data Type Size
Job_id Varchar 50
Job_title Varchar 50
Job_description Varchar 50
Company_id Varchar 50
Location Varchar 50
salary Varchar 50
experience varchar 50
Shift varchar 50
gender varchar 50
Table Name: Organization
Field Name Data Type Size
org_nameVarchar 50
org_imagVarchar 50
locationVarchar 50
strength
Varchar 50
CHAPTER 6
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6.1 Coding /Code Templates
Searching a Job
<form action="orgsearch.php" method="post" accept-charset="utf-8">
<fieldset>
<legend align="center"><span><h3>Admin Login</h3></span></legend>
<br><br><br>
<table border="0" width="100%" cellpadding="0" cellspacing="0">
<tr>
<td width="45%" align="right">Search</td>
<td width="2%" align="center">:</td>
<td width="53%"><input value="" type="text" name="keyword"></td>
</tr>
<tr>
<td colspan="3" align="center"><br>
<input value="Go" type="submit">
</td>
</tr>
</table>
<br><br><br>
</fieldset>
</form>
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Adding Jobs
<form action="componentdb.php" method="post" name="f7"
enctype="multipart/form-data">
<fieldset>
<strong><center>
<u>COMPONENT DETAILS</u></center></strong><br />
<center>
<strong>Component Type:</strong>
<select name="ct1">
<option value="0">Image</option>
<option value="1">video</option>
</select><br /><br />
<strong>Component Name:</strong>
<select name="cn1">
<option value="0">2Dimage</option>
<option value="1">3Dimage</option>
</select><br /><br />
<strong>Upload File:</strong><input type="file" name="f1" /><br /><br />
<strong>Component properties:</strong>
Imageformat:<select name="cpp1">
<option value="0"></option>
<option value="1">JPEG</option>
<option value="2">gif</option>
<option value="2">png</option>
<option value="4">pjpeg</option>
</select><br /><br />
Dimensions:<select name="cpp2">
<option value="0"></option>
<option value="1">640*480</option>
<option value="2">1024*768</option>
<option value="3">1275*1024</option>
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<option value="4">1600*900</option>
</select><br /><br />
video format:<select name="cpp3">
<option value="0"></option>
<option value="1">.avi</option>
<option value="2">.mp4</option>
<option value="3">.mkv</option>
<option value="4">.wmv</option>
</select><br /><br />
<strong>component description:</strong>
<textarea rows="2" cols="20" name="cd1">
this is image/video
</textarea><br /><br />
<br /><br />
<input type="submit" value="Submit" /></center>
</fieldset>
</form>
Inserting values into the database
<?php
include '../lib/db.php';
$_FILES['f1']['type'];
if ((($_FILES["f1"]["type"] == "image/gif")
|| ($_FILES["f1"]["type"] == "image/jpeg")
|| ($_FILES["f1"]["type"] == "image/pjpeg")))
{
move_uploaded_file($_FILES['f1']['tmp_name'],'../uploads/components/'.
$_FILES['f1']['name']);
$name=$_POST['cn1'];
$type=$_POST['ct1'];
$image=$_FILES['f1']['name'];
$imageformat=$_POST['cpp1'];
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$dimensions=$_POST['cpp2'];
$videoformat=$_POST['cpp3'];
$description=$_POST['cd1'];
$e="insert into component
values('','$type','$name','$image','$imageformat','$dimensions','$videoformat','$d
escription')";
mysql_query($e);
header('location:component.php');
}
else
{
echo "Invalid file extension";}?>
View Jobs
<table cellspacing=0 cellpadding=0>
<trcolspan=2>
<td><input type="checkbox" name="r2" /></td>
<td width="200"><strong>Componenttype</strong></td>
<td width="200"><strong>Componentname</strong></td>
<td width="200"><strong>Image</strong></td>
<td width="200"><strong>Properties</strong></td>
<td width="200"><strong>Description</strong></td>
</tr>
<?php
include '../lib/db.php';
$sql="select * from component;";
$x=mysql_query($sql);
while($row=mysql_fetch_array($x))
{
?>
<trcolspan=2>
<td width="200"><input type="checkbox" name="r1" /></td>
<td width="200"><?php echo $row['type']?></td>
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<td width="200"><?php echo $row['name']?></td>
<td width="200"><?php echo $row['image']?></td>
<td width="200"><?php echo $row['imageformat']?></td>
<td width="200"><?php echo $row['dimensions']?></td>
<td width="200"><?php echo $row['videoformat']?></td>
<td width="200"><?php echo $row['description']?></td>
<td width="200"><a href="editcomponent.php?id=<?php echo $row['id']; ?>">
<imgsrc="site/edit.jpg" alt="edit" /></a>
<a href="deletecomponent.php?id=<?php echo $row['id']; ?>"
onclick="return deletecomponent()">
<imgsrc="site/cancel.jpg" alt="cancel"></a></td></tr><?php } ?>
</table>.
Editing Job<?php include '../lib/db.php';
$quer="select * from component where id=".$_REQUEST['id'];
$r=mysql_query($quer);
$result=mysql_fetch_array($r);
?>
<html>
<body>
<form action="updatecomponent.php" method="post" name="f8"
enctype="multipart/form-data">
<feildset>
<center>
Component type<input type="text" name="ct1" value="<?php echo
$result['type'];?>" /><br /> Component name<input type="text" name="cn1"
value="<?php echo $result['name'];?>" /><br />
Changefile<input type="file" name="f1" /><a href="../uploads/components/<?php echo
$result['image'];?>"></a><br />
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Image format<input type="text" name="cpp1" value="<?php echo
$result['imageformat'];?>" /><br />
Dimensions<input type="text" name="cpp2" value="<?php echo
$result['dimensions'];?>" /><br />
video format<input type="text" name="cpp3" value="<?php echo
$result['videoformat'];?>" /><br />
Description<input type="text" name="cd1" value="<?php echo
$result['description'];?>" /><br />
<input type="hidden" name="id" value="<?php echo $result['id'];?>" />
<input type="submit" value="Submit" />
</center></feildset></form></body></html>
Deleting Jobs
<?php
include '../lib/db.php';
$s="delete from component where id=".$_REQUEST['id'];
mysql_query($s);
header('location:viewcomponent.php');
?>
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6.1.1 Back-End code analysis
In the Back-end we have the following modules:
LOGIN:
The admin is the lone user of the back-end login. Once the admin logs in with
the username and password, then the authentication is invoked. If the
authentication is successful then the admin is allowed to proceed to the next
pages.
Admin Login: DataBase
Enter user name &Pwd
Code:
<?php
session_start(); //For every login a new session will be generated and the session
terminates once the user logs out.
include'../lib/db.php'; //This includes the db file which connects to the database
$sql="select * from admin where user_name='".$_REQUEST['username']."'AND
password='".$_REQUEST['password']."'";
//This query checks whether the entered username and password are present in
the database table
$result=mysql_query($sql); //Executes the query
$y=mysql_fetch_row($result);//Fetches the records in array format
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Homepage
ANDROID OS MOBILE BASED SEARCH ENGINE
if(is_array($y))
{
session_register('id');//If the array is built we register the session with a new id
$_SESSION['id']=$y[0];//Here we are assigning admin name to the sessionvariable
header("Location:index1.php");//If the username and password is valid the admin is
redirected to the home page
}
else
{
header("Location:index.php");//If the username and password is not valid then
admin is redirected to the login page
}?>
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ADD:
Once the admin logs in he can add the user details(name, user name, password, school
and class), school details(school name), curriculum details(curriculum name, image and
the school name), class details(class, image, curriculum name), subject details(name,
image, grade), chapter details(chapter name, image, subject id), content details(title,
description, chapter) to the database.
<?php
include("../lib/db.php"); //includes the db file which connects to the database
function add()
{
$sql="insert into users(name, user_name, password, school_id, class_id) values('".
$_POST['name']."','".$_POST['uname']."','".$_POST['pwd']."','".$_POST['se']."','".
$_POST['class']."')"; //inserts the values into the database table
mysql_query($sql); //executes the query
}?>
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EDIT:
If any modifications are to be done to the existing data present in the database then
the admin can edit the existing data and update in the database.
<?php
function edit()
{
$query="Update curriculum SET
curr_name='".$_POST['cuname']."',school_id='".$_POST['se']."',image='".
$_FILES['img']
['name']."' wherecurr_id=".$_REQUEST['id'];//Updates the the fields in the database
withnew values
mysql_query($query);//executes the query
}
?>
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DELETE
Admin can delete the data from the table in the database based on the
condition given.
<?php include("../lib/db.php"); //includes the db file which connects to
the database
function delete()
{
$sql="delete from subjects where sub_id=".$_REQUEST['id']; //deletes
the data from the table based on the condition given
mysql_query($sql); //executes the query
}
?>
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6.1.2 Front End Code analysis
Source:
<?xml version="1.0" encoding="utf-8"?>
<s:MobileApplicationxmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
firstView="views.mobileSearchEngineHome">
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
</s:MobileApplication>
Mobilesearch:
<?xml version="1.0" encoding="utf-8"?>
<s:Viewxmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
actionBarVisible="false"
>
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
<s:HTTPService method="POST"
url="http://localhost/mobisearch/login.php"
id="http"
result="http_resultHandler(event)"
fault="http_faultHandler(event)">
<s:requestxmlns="">
<uname>
{username.text}
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</uname>
<password>
{password.text}
</password>
</s:request>
</s:HTTPService>
</fx:Declarations>
<fx:Script>
<![CDATA[
importmx.rpc.events.FaultEvent;
importmx.rpc.events.ResultEvent;
protectedfunction
button1_clickHandler(event:MouseEvent):void
{
// TODO Auto-generated method stub
username.text="";
password.text="";
}
protectedfunction
button2_clickHandler(event:MouseEvent):void
{
// TODO Auto-generated method stub
trace("sending..");
http.send();
}
publicvarsuc:Search = new Search();
protectedfunctionhttp_resultHandler(event:ResultEvent):void
{
// TODO Auto-generated method stub
if(event.result=="success"){
this.removeAllElements()
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this.addElement(suc);
}
else{
Error.text = "Incorrect credentials.."
}
}
protectedfunctionhttp_faultHandler(event:FaultEvent):void
{
// TODO Auto-generated method stub
trace("failed"+event.fault);
Error.text = "Connection failed"
}
protectedfunctiontxt_username_focusInHandler(event:FocusEvent):void
{
// TODO Auto-generated method stub
if(Error.text != ""){
Error.text = "";
}
}
]]>
</fx:Script>
<s:Image width="100%" height="100%"
scaleX="100"
scaleY="102"
scaleZ="1"
source="@Embed(source='images/1.jpg')"/>
<s:VGroup width="100%" height="100%" gap="10"
horizontalAlign="center"
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verticalAlign="middle"
>
<s:HGroup width="100%" horizontalAlign="center">
<s:Label text="username"/>
<s:TextInput id="username" color="#000000"
focusIn="txt_username_focusInHandler(event)"
/>
</s:HGroup>
<s:HGroup width="100%" horizontalAlign="center">
<s:Label text="password"/>
<s:TextInput id="password" displayAsPassword="true"
color="#000000"
focusIn="txt_username_focusInHandler(event)"
/>
</s:HGroup>
<s:Label id="Error" color="#F70B0B"/>
<s:HGroup width="100%" horizontalAlign="center">
<s:Image source="@Embed(source='images/2.png')"
click="button2_clickHandler(event)"
buttonMode="true"
mouseChildren="false"
/>
<s:Image source="@Embed(source='images/7.png')"
click="button1_clickHandler(event)"
buttonMode="true"
mouseChildren="false"
/>
</s:HGroup>
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</s:VGroup>
</s:View>
Search.mxml:
<?xml version="1.0" encoding="utf-8"?>
<s:Viewxmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
width="100%" height="100%"
contentBackgroundColor="#ffffff"
>
<fx:Script>
<![CDATA[
importmx.collections.ArrayCollection;
importmx.rpc.events.FaultEvent;
importmx.rpc.events.ResultEvent;
[Bindable]
publicvarxmls:ArrayCollection;
protectedfunctionbtnSrch_clickHandler(event:MouseEvent):void
{
// TODO Auto-generated method stub
if(txtSrch.text != ""){
http.url =
"http://localhost/mobisearch/search.php";
http.send();
}
}
protectedfunctionhttp_resultHandler(event:ResultEvent):void
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{
// TODO Auto-generated method stub
httpXmlService.url = event.result.toString();
httpXmlService.send();
trace(event.result);
}
protectedfunctionhttp_faultHandler(event:FaultEvent):void
{
// TODO Auto-generated method stub
error.text = "error connecting to server ";
}
protectedfunctionhttpXmlService_resultHandler(event:ResultEvent):void
{
// TODO Auto-generated method stub
xmls =
event.result.companies.companyasArrayCollection;
}
protectedfunctionhttpXmlService_faultHandler(event:FaultEvent):void
{
// TODO Auto-generated method stub
trace("error");
}
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protectedfunctionlblLogout_clickHandler(event:MouseEvent):void
{
// TODO Auto-generated method stub
NativeApplication.nativeApplication.exit();
}
]]>
</fx:Script>
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
<s:HTTPService id="http"
result="http_resultHandler(event)"
fault="http_faultHandler(event)">
<s:requestxmlns="">
<keyword>
{txtSrch.text}
</keyword>
</s:request>
</s:HTTPService>
<s:HTTPService id="httpXmlService"
result="httpXmlService_resultHandler(event)"
fault="httpXmlService_faultHandler(event)">
</s:HTTPService>
</fx:Declarations>
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<s:VGroup width="100%" height="100%" gap="0">
<s:HGroup width="100%" horizontalAlign="right" paddingRight="10">
<s:Label id="error" maxWidth="350"/>
<s:Label
text="Logout"
id="lblLogout"
click="lblLogout_clickHandler(event)"
buttonMode="true"
mouseChildren="false"
/>
</s:HGroup>
<s:HGroup width="100%" maintainProjectionCenter="true">
<s:TextInputcolor="#000000" width="90%"
id="txtSrch"/>
<s:Image width="71" height="67"
click="btnSrch_clickHandler(event)"
source="@Embed(source='images/search_2.png')"/>
</s:HGroup>
<s:ListdataProvider="{xmls}" color="#000000"
itemRenderer="renderers.tile"
width="100%"
height="100%"/>
</s:VGroup>
</s:View>
Login
<?php
$host = "localhost";
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$user = "root";
$pwd = "";
$db = "mobilesearch";
mysql_connect($host,$user,$pwd) or die (" connection error");
mysql_select_db($db) or die("db could not slectd");
//$query ="select * from manage_users where user_name=".$_POST['uname'].";
$query ="select * from users where name='".$_REQUEST['uname']."' and password='".
$_REQUEST['password']."'";
$y=mysql_query($query);
$x=mysql_fetch_array($y);
if(is_array($x))
{
/*$file_name=$x['userid'].".xml";
$xml_file=fopen($file_name,'w');
$data='<?xml version="1.0" encoding="utf-8"?>';
$data.='<list>';
$data.='<user><userdetails>';
$data.='<name>'.$x['user_name'].'</name>';
$data.='<sessid>'.$x['userid'].'</sessid></userdetails></user>';
$data.='<buddies>';
$query1 ="select manage_users.user_name,friends.friend_id from
friends,manage_users where friends.user_id=".$x['userid']." AND
friends.friend_id=manage_users.userid";
$f=mysql_query($query1);
while($f_array=mysql_fetch_array($f))
{
$data.='<userdetails><name>'.$f_array['user_name'].'</name><sessid>'.
$f_array['friend_id'].'</sessid></userdetails>';
}
$data.='</buddies></list>';
fwrite($xml_file,$data);*/
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echo "success";
}
else
{
print "failed"; } ?>
Search.mxml:
<?php
mysql_connect('localhost','root','');
mysql_select_db('mobilesearch');
$sql="select *from jobs where job_title LIKE '%".$_REQUEST['keyword']."%'";
$x=mysql_query($sql);
$xml='<?xml version="1.0" encoding="utf-8"?>';
$xml.='<companies>';
while($row=mysql_fetch_array($x))
{
$xml.='<company>';
$xml.='<id>'.$row['job_id'].'</id>';
$xml.='<name>'.$row['job_title'].'</name>';
$xml.='</company>';
}
$xml.='<company>';
$xml.='<id></id>';
$xml.='<name></name>';
$xml.='</company>';
$xml.='</companies>';
$files=fopen('search.xml','w');
fwrite($files,$xml);
echo 'http://localhost/mobisearch/search.xml';
?>
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CHAPTER 7
TESTING
Testing is a process to show the correctness of the program. Testing is needed to show
completeness, t improve the quality of the software and to provide the maintenance aid.
Some testing standards are therefore necessary reduce the testing costs and operation
time. Testing software extends throughout the coding phase and it represents the
ultimate review of configurations, design and coding. Based on the way the software
reacts to these testing, we can decide whether the configuration that has been built is
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study or not. All components of an application are tested, as the failure to do so many
results in a series of bugs after the software is put to use.
7.1 BLACKBOX TESTING
Blackbox testing also called behavioral testing, focuses on the functional requirements
of software. This testing approach enables the software engineer to derive the input
conditions that will fully exercise all requirements for a program. Blackbox testing
attempts to find the errors like
Incorrect or missing functions
Interface errors
Errors in data structures or external database access
Behavior or performance errors
Initialization and termination errors
In Blackbox testing software is exercised over a full range of inputs and outputs are
observed for correctness.
7.2 WHITEBOX TESTING
Whitebox testing is also called Glassbox testing is a test case design control; structure
of the procedural design to derive test cases using Whitebox testing method, the
software engineer can derive the test cases that guarantee that all independent paths
within the module have been exercised at least once. Exercise all logic decisions on
their true or false sides. Execute all loops at their boundaries and within their
operational bounds. Exercise internal data structure to ensure their validity.
7.3SOFTWARE TESTING STRATEGIES
Testing involves
Unit testing
Integration testing
Acceptance testing
The first level of test is unit testing. The purpose of unit testing is to ensure that each
program is fully tested.
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The second step is integration testing. In this individual program units or programs are
integrated and tested as a complete system to ensure that the software requirements are
met.
Acceptance Testing involves planning and the execution of various types of tests in
order to demonstrate that the implemented software system satisfies the requirements.
Finally our project meets the requirements after going through all the levels of testing.
7.4 TESTING THE APPLICATION
Application should be thoroughly tested before releasing it into the market.
Testing will show if the application is delivering the expected results. In this case we
have given some wrong values to the application so that we can counter the errors
produced by the application in such a case. Next topic is test cases, where 10 test cases
are considered and checked if the test results are positive or not.
7.4.1 TEST CASES (FRONT END)
Test case no
Test case name
Input Actual value Expected value
Test result
1 Login Username and password is blank
Provide Username and password
Provide Username and password
No error
2 Search Search for a Job in the database
Enter search query
Search in Database and return results
No error
Table 7.4.1.1
7.4.2 TEST CASES(BACK END)
Test case no
Test case name
Input Actual value Expected value
Test result
1 Admin Login Username and
password is
blank
Provide name and password
Provide name and password
No error
2 Add users The user fields are left blank
User details are being provided
User details are being provided
No error
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3 Edit users Filled user fields are displayed
Edit the required fields
Edit the required fields
No error
4 Delete users User records Delete the user record
Delete the user record
No error
5 Add Job The Job fields are left blank
Job details are being provided
Curriculum details are being provided
No error
6 Edit Job Filled Job fields are displayed
Edit the required fields
Edit the required fields
No error
7 Delete Job Job details of the users
Delete the Job from the database
Delete the Job from the database
No error
8Add Organization
The Organization field is left blank
Based on the Organization we add classes
Based on the Organization we add classes
No error
9 Edit Organization
Organization details are displayed
Edit the Organization based on the requirement
Edit the Organization based on the requirement
No error
10 Delete Organization
Organization details
Delete the Organization
Delete the Organization
No error
Table 7.4.2
CHAPTER-8
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8.1 Application screen shots
8.1.1 Back End application screen shots
LOGIN PAGE
FIG 8.1.1
Here the admin enters the username and password. This directly connects to the
database in the users tables look up in the table if the entered username and password is
correct then the page is linked to another page
8.1.2 View Page
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FIG 8.1.2
After login the page which is displayed is View user where the information of the users
can be viewed i.e the users who logged into the database.
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8.1.3 Add user page
FIG 8.1.3
This page used to add the users in the database and align the values in their
particular table fields. To view the users who all logged in see view user.
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8.1.4 Add Job page
FIG 8.1.4
This page is used to add jobs in the database. The jobs contains the fields
where a user specify his/her requirements.
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8.1.5 View Jobs page
FIG 8.1.5
Admin can view can jobs to which the user had applied all the time. These
records are maintained in the database.
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8.1.6 Edit job page
FIG 8.1.6
User can edit the jobs giving the details in the particular fields.
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8.1.7 Delete Users page
FIG 8.1.7
The admin can view and delete the job details to which a user had applied.
8.1.8 Log out page
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FIG 8.1.8
When we log out the page return back to the login page.
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8.2.1 Front end application screen shots
Login page in Mobile
FIG 8.2.1
When we debug the application code the code starts executing. Here is the display of
the application in the mobile.
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8.2.2 Action Page
FIG 8.2.2
Entering the username and password in the mobile app, this will connect to the database
of the sql from where it retrieves the data from it and executes the operation.
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8.2.3 Search Page in the Mobile
FIG 8.2.3
After successful sigin the page is displayed like this. This page contains a search image
and text input where the user enters the keywords in the text box.
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8.2.4 Search field
FIG 8.2.4
Enter the keyword with you want to search the Jobs, The jobs which are starting with
letter “h” are displayed first following others.
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CHAPTER 9
9.1 Conclusion
By this project, a unique search engine was presented for effective searching Of
information through mobile interface. The engine adopts three methods for retrieval:
two autonomousand one combinational. The ontology-based method makes use of the
semantic mark-up metadata accompanying each collection where an illustrative user
interface is used for graphical query formulation. The content-based method makes use
of the low-level visual characteristics of the multimedia material while the hybrid
method, which is the main contribution of this work, makes a combined use of the
previous two methods for offering a more complete result set to the user.
Easy access and portability of the system also helps to increase the performance of the
system in a better manner.
Future work includes the extension of the hybrid search engine and the integration of
additional cultural content. Finally we are investigating the addition of a semantic
recommendation engine to be able to make additional query suggestions to the user in
an automatic manner
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CHAPTER 10
10.1 Future Enhancements
Google Android Sales to Overtake iPhone in 2012 .
The OHA is committed to make their vision a reality: to deploy the Android platform
for every mobile operator, handset manufacturers and developers to build innovative
devices.Intel doesn’t want to lose ownership of the netbook market, so they need to
prepare for anything, including Android .
Fujitsu launched an initiative to offer consulting and engineering expertise to
help run Android on embedded hardware, which aside from cellphones, mobile internet
devices, and portable media players, could include GPS devices, thin-client computers
and set-top boxes. More Android devices are coming and some will push the envelope
even further .
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Bibilography
HTML: Website:www.w3schools.com
Text Book: WebTechnologies
Author: Patrick Naughton and Herbert Schildt
PHP: Website: www.w3schools.com
Text Book: Web Technologies
Author: Patrick Naughton and Herbert Schildt
MYSQL: Website: www.google.com, Wikipedia
Ref: Beaulieu, Alan (April 2009). Mary E Treseler. ed. Learning
SQL
Sebastopol, O’Reilly.
Adobe Flash
builder Burrito Website: www.google.com , Wikipedia , Learn Builder ,
Android Website: http://www.google.com"Open Handset Alliance". Open
Handset Alliance. http://www.openhandsetalliance.com/.
Wikipedia, Youtube
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REFERENCES
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