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International Journal of Advanced Engineering, Management and Science (IJAEMS) [Vol-2, Issue-8, Aug- 2016]
Infogain Publication (Infogainpublication.com) ISSN : 2454-1311
www.ijaems.com Page | 1208
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Manish Shrivastava, Mohana Prudi, Pooja Chugwani
Department of CSE, Institute of Technology, Guru Ghasidas University, Bilaspur, India
Abstract— Mobile phones and tablets have substituted
newspapers, books, magazines, music players, play
stations, etc. which play an integral part in our day to day
lives by offering numerous applications with extra-
ordinary features offering similar in some cases better
functionalities. Android is a software environment built
for mobile devices. It is the most popular mobile platform
because of ease in operation and range of applications.
The existing Android mobiles perform zooming using
button controls, pinch and zoom and tap. Our aim is to
substitute this existing features with a more comfortable
and user- friendly option i.e. to introduce a whole new
approach by explicitly zooming according to eye-sight.
This feature shall take the input as user’s eyesight and
zoomed pages according to that eyesight which not only
eradicates the necessity of manual zooming but it can also
enable the user to use his phone without the use of
spectacles. In case the user wants to choose his own
comfortable reading level this feature will allow him to do
so.
Keywords— Android, Pinch and Zoom, Button
controls, eye-sight.
I. INTRODUCTION
Mobile phones are a part and parcel of our life. Phones
serve different purposes for different people. Today’s
mobile market offers different phones with different
ranges of application, different costs, different physical
features and many more. Platforms available on mobile
phones are Symbian, BlackBerry, iPhone, Windows and
of course, the increasingly popular Android platform. The
reason behind this is using an android phone is easy and it
has something for everyone.
Android is a software platform that has played a
significant role in revolutionizing the global cell phone
market. Android is primarily a Google effort, in
collaboration with the Open Handset Alliance. The OHA
is an alliance of nearly 50 organizations which have come
together in bringing a “better” and more “open” mobile
phone to the market [1]
. As of today android is the most
affordable and user friendly platform used by people of
different ages for different purposes. Way back, mobile
phones were mainly used for primary interests such as for
voice communications, an address book, and increasingly,
texting. The scenario today is completely different.
People use phone for reading, browsing, gaming, camera,
music and video player and many more.
The phones which are capable of serving these features
are called smart phones. Android developers face many
challenges while incorporating these features into the
phones. One of the big functionality gaps on the phones is
the experience the user gets compared to that of a desktop
because of screen size. For this zoom features are
introduced in various applications where ever necessary.
We use this zoom feature in browsing, reading,
photography, maps and etc.
II. EXISTING APPLICATIONS
All of us are familiar with the existing approaches used
for zoom in android. Some of the applications use pinch
and zoom wherein the user uses his fingers and the pinch
gesture is detected .The scaling factor is the distance
between the pointers, i.e., his fingers determines the
amount of zoom in or zoom out required.Another
approach is tap action in which the user taps on the screen
and the number of times he taps the screen gets zoomed in
and out accordingly. The user here will not be able to
zoom according to his choice as the scaling factors will be
decided by the internal functionality. Simpler approach
for zoom generally used in maps is zoom button controls.
These applications offer zoom in and out buttons. The
application is programmed for zooming the page on
button click to a certain level.
III. PROPOSED WORK
Wouldn’t it be easier if your phone adjusts the view to
such comfort levels where the only thing you have to
worry about is to find the right page to read or browse?
The sole purpose of this paper is to achieve this objective.
Nowadays, phones are not used just for communication;
they offer numerous services both academic and
recreational. Users tend to use their phones more often for
reading on the go .This can be carried out effectively only
when the user is able to view the pages clearly. To gain
clarity user tends to zoom and adjusts pages to his
comfort level by pinching in and out. This paper suggests
an alternate approach for the above procedure.
Android is the most preferred platform due to its user-
friendliness, affordability and vast range of applications.
We intent to take the user-friendliness of this interface to
a next level by introducing a new feature which will

International Journal of Advanced Engineering, Management and Science (IJAEMS) [Vol
Infogain Publication (Infogainpublication.com
www.ijaems.com
replace the feature of pinch and zoom and other existing
ones. Android offers number of methods and classes and
even allows us to create our own methods which will help
us in developing this application. This will help even a
layman not familiar with using a touch phone to operate
properly .In the existing android applications, most of
them do not offer proper zoom controls and many a time
users face problems in adjusting zoom level manually
IV. IMPLEMENTATION
The main purpose is to achieve this new feature in
applications wherein there is a need to adjust zoom. This
feature takes user eye sight as an input and provides a
page with adjusted zoom level as an output. To achieve
this feature of our application, we will need to access
zoom functionality of an android view. There are different
views available in android and there are different zoom
functions for each view.
Then we implemented explicit zooming taking eyesight as
input for testing purpose. The methods SetScaleX()
,SetScaleY() were used to perform zooming. Scale
methods are called by passing float values as parameters
with minimum as 0.5f and 1.0f as normal scale. Here we
have made an assumption for developing the application,
i.e. for increment of 0.25 in eyesight the scale value is
increased by 0.6.
To show how this will be carried out in an actual
application we have developed a sample application.
Fig. 1: Home Screen
Engineering, Management and Science (IJAEMS) [Vol
Infogainpublication.com)
replace the feature of pinch and zoom and other existing
ones. Android offers number of methods and classes and
even allows us to create our own methods which will help
s application. This will help even a
layman not familiar with using a touch phone to operate
properly .In the existing android applications, most of
them do not offer proper zoom controls and many a time
users face problems in adjusting zoom level manually.
IMPLEMENTATION
The main purpose is to achieve this new feature in
applications wherein there is a need to adjust zoom. This
feature takes user eye sight as an input and provides a
page with adjusted zoom level as an output. To achieve
r application, we will need to access
zoom functionality of an android view. There are different
views available in android and there are different zoom
Then we implemented explicit zooming taking eyesight as
ose. The methods SetScaleX()
,SetScaleY() were used to perform zooming. Scale
methods are called by passing float values as parameters
with minimum as 0.5f and 1.0f as normal scale. Here we
have made an assumption for developing the application,
ncrement of 0.25 in eyesight the scale value is
To show how this will be carried out in an actual
application we have developed a sample application.
Fig. 2: User Entered his Eye Sight
Fig. 3: Nomal Google Page
Engineering, Management and Science (IJAEMS) [Vol-2, Issue-8, Aug- 2016]
ISSN : 2454-1311
Page | 1209
User Entered his Eye Sight
Nomal Google Page

International Journal of Advanced Engineering, Management and Science (IJAEMS) [Vol
Infogain Publication (Infogainpublication.com
www.ijaems.com
Fig. 4: Google Page zoomed according to
User eye-sight level
Fig. 5: Activity Test
Engineering, Management and Science (IJAEMS) [Vol
Infogainpublication.com)
Google Page zoomed according to
Fig. 6: On click of zoom in text size is zoomed
Fig. 7: Corresponding level of eye
returned to user
Engineering, Management and Science (IJAEMS) [Vol-2, Issue-8, Aug- 2016]
ISSN : 2454-1311
Page | 1210
On click of zoom in text size is zoomed
Corresponding level of eye-sight is
returned to user

International Journal of Advanced Engineering, Management and Science (IJAEMS) [Vol-2, Issue-8, Aug- 2016]
Infogain Publication (Infogainpublication.com) ISSN : 2454-1311
www.ijaems.com Page | 1211
V. ALGORTITHM
1. If user knows his eye-sight
2. Then take input for both left eye and right eye
2.1. Compare the eye-sight and consider larger value
2.2. Calculate the zoom scale level for the eye-sight
2.2.1. Divide the eye-sight by factor of 0.25
2.2.2. Multiply this number by 0.3
2.2.3. Add 1 to this value
2.3. Pass the calculated zoom value to the Browser page
2.4. Now set the zoom value of the WebView by using
SetInitialScale method
3. Else the user can use the option Check
3.1. The user will be redirected to check your eye-sight
page
3.2. The user will use buttons to zoom in or zoom out the
page
3.3. On finding his comfortable reading level the user
will click comfortable button
3.4. Display eye-sight for the zoom value
3.5. Go to step 2
4. End
VI. CONCLUSION
Zooming is a common technique used in phones to get a
better view of the content on the phone. Through this
paper we intent to anticipate the need of the user
beforehand and zoom the page explicitly by taking user
eye-sight as input. The motto of this paper is to apply this
approach into cellphones, tablets or where ever
applicable.
The above proposed paper gives user-comfort utmost
priority. In phones generally we adjust the zoom by built-
in methods but, even after adjusting the zoom levels,
users with eye sight problems have to use their spectacles
to read an article, blog, news and during browsing .if
applied into applications this feature shall explicitly adjust
the zoom level to such an extent that the user can view the
page without using spectacles. In the proposed future
work the feature usefulness can be further extended.
VII. FUTURE WORK
Mobile phones and tablets have made it possible for
everyone to perform reading, surfing, communicating,
shopping and other numerous functionalities simpler and
accessible on the go. Presently in the sample application
we have made an assumption for the zoom eye-sight
relation .In the future the suggested work can be fully
achieved by calculating best possible zoom levels for
different eyesight levels. Then we want to incorporate this
feature into different applications and if possible on the
complete device which can be very useful for aged people
and people with eye problems.
Physically handicapped can be helped by incorporating
sensors by setting the eye-sight level into the device if any
and detect the eye movement using sensors. High-level
sensors can also be used to detect the eye-sight and
automatically feed this information into the device and
perform zooming.
REFERENCES
[1] ”Android in Action” by W. Frank Ableson, Robi Sen,
Chris King
[2] http://www.androidpeople.com/android-gallery-
imageview-example
[3] http://techblogon.com/open-web-browser-in-android-
with-specific-url-example-code/
[4] http://blog.vogella.com/2011/02/21/android-intents/
[5] http://developer.android.com/guide/components/intent
s-filters.html
[6] http://stackoverflow.com/questions

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