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Android development Role 

Today the Mobile communication systems play very important role in our day to day life. There is

enhancement in data rate and availability of data in mobile communication. Mobile provides the function of

reminder depends on date and time. But now day’s smart phones provides us various application. One of the

applications provided by smart phones is reminder which base on time.

In this paper we introduce a new technology which is depends on Android OS which give the reminder about place

that user want to visit. In the first part of this paper there is introduction about the application. In reaming paper will

explain the technology.

INTRODUCTION

There is a lot of reminder and alert system in today’s mobile phones. But all these reminder system work based on time and da te.

Sometimes there is desire for reminders based on location. For an example in daily routine we go to mall to purchase listed items n

most of the times we forget some of the item to be purchased. We want ourselves to be reminded of the things next time we are at

the mall. Every day we use special messages in order to help us remember future tasks. These messages, known as reminders, take

many forms, such as post-it notes, emailing one self, to-do lists, and electronic calendar alerts.

For example, a student may send himself an email to remind himself to bring a book for class the next day.

So proposed application Place Reminder Location Based Reminder on “Mobile Phones “allow user to set reminders based on

location in the mobile phones. Once the reminder is set say for grocery store every time when we go to the grocery store the correctly in the correct place at correct time.

Consider some real world situations:

1. Some people tend to forget things when they go for office or school.

2. A person went to office and thought of doing some work in home when he returns to home.

3. Person may like to purchase a birthday gift the next time when the at gift shop.

4. A person went to the grocery store from home and forgot to bring a list of items which he had written on a piece of paper.

5. When people go on holiday some time they forgot to visit places.

It is desired that there would be a reminder system or application to automatically remind people what they might have forgotten to

bring along just when they step at that particular location. The present application is motivated by these situations. Thus our

proposed application Place Reminder Location Based Reminder solves all such situations by giving beep/message whenever user

reaches location.

GPS is key concept in Place Reminder. The Global Positioning System (GPS) is a space-based satellite navigation system that

provides location and time information in all weather conditions, anywhere on or near the Earth where there is an unobstructed line

of sight to four or more GPS satellites. We need a GPS receiver enabled Android Mobile phone for receiving the GPS data from the

satellite. There are a wide range of such mobiles are available in the market.

I. GPS

The Global Positioning System (GPS) is a space-based satellite navigation system that provides location and time information in all

weather conditions, anywhere on or near the earth. GPS is a complex system which combines three segments – space, control and

user segment. Such distinction of segments emphasizes the main objective of the combined segments: to create a functional system

that at a global level makes people aware of the possibility and potential of the services based on navigation.

GPS uses the satellite constellation, where each of the satellites transmits the signal in the range which encompasses the message

navigation. The latter contains also the information necessary to determine the satellite coordinates and brings the satellite clocks in

accordance with the GPS time.

At the same time the measurements of at least four satellites are required in order to determine the positioning of three-dimensional

and time capacity. The satellite constellation provides a range of possibilities for each user who is located anywhere and anytime on

the Earth. Tracking of GPS satellite, using its operative controls and determining their location in space, is performed by the

Operational Control Segment (OCS).

Additionally, the segment takes care of

 Maintenance of orbiting satellites through small manoeuvres;

 Introduction of corrections and adaptation of satellite clocks and capacity;

 Monitoring of the GPS satellites and upload of navigation data for each satellite

 Giving orders for big changes in case of satellite failure.

The architecture of Place Reminder called GPS Architecture consists of several segments that are sufficient to create a fully

functional unit. The absence of any of these parts means at the same time the impossibility of developing the system.

As can be seen, there are three basic segments:

1. User – represents a person who uses the possibilities provided by the mobile device and the Place Reminder-An Android

application installed on the mobile device;

2. Mobile terminal device – hardware-equipped terminal which enables the usage of Place Reminder-An Android application;

3. GPS system – system of satellites and receivers intended for positioning. The basis for the running of the application lies in the

mathematical concept, i.e. formula which compares the geographic position entered into the application and at which the user wants

to be alarmed, and the position given by the GPS system that shows at which coordinates the mobile terminal device is currently

located.

Working of GPSAlarm System

II.LBS

The term Location Based Services (LBS) refers to mobile services in which the user location information is used in order to add

value to the service as a whole. The user location information in that case consists of X-Y coordinates generated by any given

Location Determination Technology (LDT), such as Cell-ID, A-GPS,EOTD, etc. The Location Based Services (LBS) are mobile

applications that depend on the location of the mobile device, such as cellular phones. LBS services can be categorised as imposed

LBS services (push services) and as user-requested LBS services (pull services). In order to make the LBS services possible, some

infrastructure elements are necessary, including [6]:

 Mobile devices,

 Applications,

 Communication network,

 Positioning of components,

 Servers,

 Services.

Mobile devices are tools used to access LBS services, send requests and correct results. Such devices can be Personal Navigation

Devices (PNDs), Personal Digital Assistant (PDA), portable computers, cellular phones, etc. [8]. The user’s interface for access to

LBS services represents an application. Usually it is software-developed by the service provider, uploaded and installed on the

user’s device. The specific application is usually developed for specific LBS services. Because of the constraints of the mobile

devices (small display size, processor of limited power and memory, battery capacity), LBS applications have to be light and save

batteries.

The service providers are engaged in server maintenance which sends different types of LBS services to users, and are responsible

for the processing of service requests and for returning the request result. The server calculates the positions, looks for the routes or

specific information based on the user’s location. The service providers usually maintain all information requested by the user.

Instead, the content providers are responsible for the collection and storage of geographic data, location-based information, etc.

These data will be requested and processed by the server and then returned to the users.

Android Operating System

Android is a Linux-based operating system[3]. designed primarily for touch screen mobile devices such as smart phones and tablet

computers. Initially developed by Android, Inc., which Google backed financially and later bought in 2005[9]. Android was

unveiled in 2007 along with the founding of the Open Handset Alliance: a consortium of hardware, software, and

telecommunication companies devoted to advancing open standards for mobile devices[10].The first Android-powered phone was

sold in October 2008[2].

Android is open source and Google releases the code under the Apache License[3]. This open-source code and permissive licensing

allows the software to be freely modified and distributed by device manufacturers, wireless carriers and enthusiast developers.

Android has a large community of developers writing application(“apps”) that programming language. In October 2012, there were

approximately 700,000 apps available for Android, and the estimated number of application downloaded from Google Play,

Android primary app store, was 25 billion. These factors have contributed towards making Android the world’s most widely used

Smartphone platform, overtaking Symbain in the fourth quarter of 2010, and the software of choice for technology companies with

require a low-cost, customizable, lightweight operating system for high tech devices without developing one for scratch. As a result,

despite being primarily designed for phones and tablets, it has seen additional applications on televisions games consoles, digital

camera sand other electronics. Android’s open nature has further encouraged a large community of developers and enthusiasts to use

the open source code as a foundation for community-driven projects, which add new features for advanced user or bring Android to

devices which were officially released running other operating system. Android had a worldwide Smartphone market share of 75%

during the third quarter of 2012, with 750 million devices activated in total and 1.5 million activations per day. The operating

system’s success has made it a target for patent litigation as part of the so-called “Smartphone wars” between technology

companies. As per may 2013 , a total of 900 million Android devices have been activated and 48 billion apps have been installed

from the Google Play Store. The currently leading platforms on the market are Android, Iphone, Symbian, BlackBerry, Windows

Mobile and PalmWeb.But Android OS is now days mostly use as compare to other OS.Android is user friendly OS and easy to

access. If any user wants to create application base on android then process is easy as compare to other OS. Patented for application

is also low cost as compare to other OS [5].

SOFTWARE TOOLS

I. Android SDK

II.IDE:ECLIPSE

III. Database:SQLite

IV. PhoneGap

I. Android SDK

A software development kit that enables developers to create applications for the Android platform. The Android SDK includes

sample projects with source code, development tools, an emulator, and required libraries to build Android applications. Applications

are written using the Java programming language and run on Dalvik, a custom virtual machine designed for embedded use which

runs on top of a Linux kernel. This virtual machine is register-based, and it can run classes compiled by a java language compiler

that have been transformed into its native format and optimized for mobile devices that was designed and written by Dan Bornstein

and other Google engineers. Dalvik is a part of the software stack that makes up the Android platform.

VI. CONCLUSION

The prevalence of mobile phones and the pervasiveness of their networks make them a promising platform for personal ubiquitous

computing. Our findings from a two week deployment of Place Reminder validate that location-based reminders can be useful even

with coarse location-sensing capabilities. Notably, location was widely used as a cue for other contextual information that can be

hard for any system to detect. On the whole, it appears that the convenience and ubiquity of location-sensing provided by mobile

phones outweighs some of their current weaknesses as a sensing platform. This bodes well for the use of mobiles phones as a

personal ubiquitous computing platform. Our study revealed unexpected uses of location-aware reminders. We found that Place

reminder was often used for creating motivational reminders to perform activities that would vary in priority over time. This is

similar to using post-it notes. In highly visible areas for motivation. The locations for motivational reminders were often set at

various shops.