Android Report Internship

7/24/2019 Android Report Internship

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Acknowledgements

First, I would like to thanks Mr Suenaga, my tutor during this internship, who gave me this

interesting project, and gave me his help , his time and the tools to make my project properly

I also would like to thanks Mr !atrick Le"egue, my #rench tutor, "ecause it is thanks to him that I

had the possi"ility, to do my internship in $apan

%e&t I would like to thanks Mr Ousaka, Mr 'aino, Mr (ajima, and all the sta## #rom the S%)*, #or

their kindness and #or their welcome

Finally, I would like to thanks the students o# my la"oratory, especialy *akeasumi Sato, #or their help,

#or their #riendship and #or helping me to discover *he "est parts o# $apanese culture

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Abstract

I #inished my studies at iut +a+ o# Lille with an internship a"road, an internship with the aim to

improve my technical a"ilities in computer science, English, "ut also in $apanese, "ecause this course is held

in $apan, a country that I love #or many years

My topic #or this internship was to learn how to create an application in android, the oogle

operating system #or mo"ile devices *he design o# such an application is made in slightly modi#ied $ava *he

purpose o# the #inal application is to help students to speak easily with the $apanese It is a system o#

data"ases that allows the user to have English phrases and their translations in $apanese So I also used my

knowledge o# data"ases during my internship

*his internship allowed me to increase my knowledge in $ava, a language with which I had many

di##iculties, "ut also to discover di##erents aspects o# $apanese culture and wonder#ul people who made this

internship really enriching #or me

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Contents

Acknowledgements..........................................................................................................................3

Abstract............................................................................................................................................4

Introdution.......................................................................................................................................5

1.Presentation of the work environment. .............................................................................................7

1.1 a!an......................................................................................................................................7

1.2 "#$%....................................................................................................................................&

1.3 'aborator(.............................................................................................................................) 1.3.1 Presentation............................................................................................................)

1.3.2 *+ui!ment available ..............................................................................................)

2.,( !ro-ect /ow to create Android a!!lication.............................................................................10

2.1 Android................................................................................................................................10

2.1.1 hat is android ....................................................................................................10

2.1.2"!ecifications ........................................................................................................10

2.1.3$haracteristic of the market ...................................................................................11

2.1.4. h( Android is better .........................................................................................13

2.2 irst !ro-et task killer........................................................................................................14

2.2.1 %he basics of creating a!!lications........................................................................14

2.2.2 %he !ro-ect..............................................................................................................172.2.3 Im!rovements ........................................................................................................21

2.3 "econd !ro-ect ..................................................................................................................22

2.3.1 atabases...............................................................................................................22

2.3.2 %he !ro-ect..............................................................................................................22

2.3.3 im!rovements.........................................................................................................33

3. hat did I learn ...........................................................................................................................34

3.1. %echnical(..........................................................................................................................34

3.2. /umanl(............................................................................................................................34

$onclusion..........................................................................................................................................34

A!!endies.........................................................................................................................................35

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1.Presentation of the work environment.

,-, Japan

Since the "eginning o# my studies, I wanted to do my internship a"road, "ut I didn+t know i# I could

do it *hen I discovered that there was opportunity #or me to go to $apan, so I did not hesitate, it is a

country that I love #or many years now - country with a culture so special, "athed in a contradiction

"etween high technology and persistent traditions

$apan is an archipelago o# 8,9:; islands *he #our largest islands are


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*oday, $apan is one o# the leading nations in the #ields o# scienti#ic research, particularly technology,

machinery and "iomedical research %early @, researchers share a USDB "illion research and

development "udget, the third largest in the world $apan is a world leader in #undamental scienti#ic

research, having produced thirteen %o"el laureates in either physics, chemistry or medicine,three Fields

medalistsand one auss !ri5e laureate

,-* SNCT

3ith rapid progress and remarka"le technological developments in $apan during the early D?8+s,

every #ield o# our society #elt the need #or trained technical e&perts *his led to the esta"lishment o# a new

type o# a higher educational institution, the college o# technology - college o# technology admits students

#rom junior high school, who then study one organi5ed curriculum #or #ive years

*he esta"lishment that welcomed me #or my placement is one o# them It is called S%)* that means

Sendai %ational )ollege o# *echnology It educate junior high school graduates who will work as engineersStudents are here #or at least #ive years, and can o"tain an associate degree *hey can also continue #or two

more years in advanced courses to have a "achelor+s degree (ou can #ind the choices that a student has #or

"eing engineer in the appendi&es *he college mottoes are spirit o# independence, sel#Crespect and

e&ploration o# possi"ilities

*here are several departments in this college whiich are 4 eneral Sciences, In#ormation and

)ommunication Engineering, Electronic Engineering, Electronic )ontrol Engineering, In#ormation

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Engineering *he advanced courses are also divided in two categories which are Electronic Systems and

In#ormation Systems

,-( "a#orator%

,-(-, Presentation

I am in the la"oratory o# !ro#essor Suenaga *he la"oratory is part o# Electronic )ontrol Engineering

.epartment, "ut since this year, a new perspective o# work was put in place, which is .epartment o#

Intelligent Systems and Electronics *he pro#essor is currently working on human inte#ace, and more

particulary on mo"ile devices inter#aces Gecause it+s more e##icient and more convenient than "ig

computers *hat+s why my su"ject #or this placement was to study the way to create android application

,-(-* E.uip'ent availa#le

*o do my internship in good conditions, I had at my disposal the tools necessary #or my

advancement First I worked with my own laptop, which allowed me to work e##ectively immediately *hen

the teacher Suenaga "rought me a Mo"ile .evelopment !lat#orm, which serves to developers *his device

can emulate any mo"ile OS, and has all the #eatures o# the latest mo"ile phones *his device is called HOOM

OM-! ; and is manu#actured "y *e&as I didn+t used a lot this device, "ecause it was mostly #or the camera,

"ut i didn+t work 0uckly enough to code the use o# the camera

Finally, the documentation I #irst I got a "ook called -ndroid -pplication .evelopment, "ut the

pro"lem with this "ook is that it is in $apanese *he only thing I could do was to look at the sample codes

and try to understand *he second "ook is !rogramming Gi"le #or -ndroid ;D *here was two pro"lems

with this "ook *he #irst was that it was in japanese too, ans the second pro"lem was that it was as its name

suggests #ocused on -ndroid ;D, whereas I was working on -ndroid D: so, many possi"ilities that -ndroid

;D does o##er could not assist me in -ndroid D: *he last "ook is -ndroid 3ireless -pplication

.evelopment *his "ook talked a"out wireless application "ut it had all the "asics that I needed *he only

pro"lem with this "ook was that I received it in the lasts weeks

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*-M% pro+ect : /o0 to create Android application-

*-, Android

*-,-, 1hat is android 2

-ndroid is "asically an operating system #or smartphones Gut we #ind now integrated into !.-s,

touch pads or televisions, even cars /trip computer1 or net"ooks *he OS was created "y the startCup o# the

same name, which is owned "y oogle since ;:

2.1.2Specifications :

*his operating system is "ased on version ;8 o# Linu&, so it has a monolithic system kernel, what

means that all system #unctions and drivers are grouped into one "lock o# code

-rchitecture 4

-ndroid consists o# #ive layers4

C*he Linu& kernel ;8Cwhich includes use#ul drivers that allow #or e&ample 3iFi or Gluetooth

C*he li"rary written in ) and ) J J that provide higher level #unctionality such as an


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C*he user applications written in $ava /3e" "rowser, contact manager etc 1

)urrent ersion

*oday android is in its :th version, -ndroid ;D Each version is designed to gradually correct the lack

o# -!Is, to enhance the user inter#ace and add #unctionality *he latest version adds such things as support

in


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created

C!alm OS devices on !.-

CGlack"erry4 which team the same name smartphones

C3indows Mo"ile4 which team smartphones and !.-s

CSy"ian4 )urrent Market Leader

'ey partners

*o help launch -ndroid, oogle has created an alliance o# thirty companies in order to develop

standards #or mo"ile devices *here is, among others4

COperators such as %** .okomo, *CMo"ile or Gouygues *elecom

CO#Ce0uipment manu#acturers like Sony Ericsson or Samsug

CManu#acturers o# semiconductors, including Intel and %vidia

C)orporate "usinesses

market share

*he android market share continues to increase since its inception, and is likely to continue

clim"ing "ecause it is #avored "y "ig players like


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2.1.4. Why Android is better

Applications

C google applications

-ndroid includes most o# the time many oogle applications like mail, (ou*u"e or Maps

*hese applications are delivered with the machine most o# the time, e&cept in certain cases, such as some

phones running android on which the provider has replaced oogle applications "y its own applications

Cwidgets

3ith android, it is possi"le to use widgets which are small tools that can most o#ten get

in#ormation *hese widgets are directly visi"le on the main window

C-ndroid Market

*his is an online so#tware store to "uy applications .evelopers who created applications

can add them into the store, and these applications can "e downloaded "y users, they can "e "oth #ree and

paid

Multitasking

-ndroid allows multitasking in the sense that multiple applications can run simultaneously

3ith *ask Manager it is possi"le view all running tasks and to switch #rom one to another easily

SDK

- development kit has "een put at disposal o# every"ody -ccordingly, any developer can

create their own applications, or change the android plat#orm *his kit contains a set o# li"raries, power#ul

tools #or de"ugging and development, a phone emulator, thorough documentation, F-Ks and tutorials

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Modifiability:

*his allows everyone to use, improve or trans#orm the #unctions o# -ndroid #or e&ample trans#orm

the inter#ace in #unction o# uses , to trans#orm the plat#orm in a real system em"edded Linu&

*-* 3irst pro+et : task killer

*-*-, The #asics o$ creating applications

*o "egin to program #or -ndroid I needed some "asics, "ecause some elements are very di##erent,

even i# programming an application in -ndroid uses the $ava language, there#ore, an o"ject oriented

language Firstly, in an -ndroid application, there is no main method4

pu#lic static void 'ain4String56 args78---9

*his method that allows to launch a program in java is not present in an application android *his

e&ample is only the #irst o# a long list So I+ll try to e&plain what I had to learn to use to create my #irst

application which is the *ask 'iller

Activity4

-n activity is a user inter#ace that allows the user to interact with the screen, to per#orm actions

For e&ample, a te&t messaging application could have an activity that displays a list o# contacts to send

messages Once the contact is selected , activity could send in#ormation to a second activity that could

serve to send the message to the contact

3hen an application is launched, what it displays is the result o# an activity -t the code level, #or

create an activity , you must create a class that e&tends the -ctivity class -n activity has a re0uired

on)reate /1 method It is the main method *o interact with the program, through the activity, there must "e

something displayed, that is why the activity, contains what is called views

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View4

a iew is the "asic "uilding "lock #or user inter#ace components - iew occupies a rectangular area

on the screen iew is the "ase class #or widgets, which are used to create interactive UI components

/"uttons, te&t #ields, etc1*here is di##erents kinds o# views, #or e&ample a Listiew is a"le to display only an

interactive list o# what you want to display, while a 3e"iew allows you to to display a we" page -s said

"e#ore, - view occupies a rectangular area on the screen *o organise these rectangles on the screen, there

is a te&t #ile written in ML #or every di##erent screen

Xml4

ml means E&tensi"le Markup Language -ndroid provides a straight#orward ML voca"ulary that

corresponds to the iew classes and su"classes *he goal o# using -ndroid+s ML voca"ulary, is to 0uickly

design UI layouts and the screen elements they contain, in the same way that creating we" pages in


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In the previous e&ample, here+s an ML layout that uses a vertical LinearLayout to hold a *e&tiew

and a GuttonIt will "e possi"le to modi#y attri"utes the elements in the activity class that use this ML #ile

For e&ample to change the te&t

Intent :

-n activity can o# course start another one, even i# it "ut to do this, it will need a special o"ject

called Intent -n intent is "asia description o# an operation to "e per#ormed It can launch an -ctivity, send a

"roadcastIntent to any interested Groadcasteceiver components, and communicate with a "ackground

Service -n Intent per#orms "inding "etween the code in di##erent applications it can "e thought o# as the

link "etween activities It is possi"le to add some in#ormations to an Intent, thanks to an o"ject called

"undle, that you add to the intent thanks to the method 4

IntentputE&tras/Gundle o"jet"un"le 1T

AndroidManifest4

-ndroidMani#est&ml #ile is necessary #or all android applications and must have this name in its

root directory In the mani#est you can #ind essential in#ormations a"out the application #or the -ndroid

system, in#ormations that the system must have "e#ore it can run any o# the application+s code


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components

C*he list o# the Instrumentation classes that provide pro#iling and other in#ormation as the

application is running *hese declarations are present in the mani#est only while the application is "eing

developed and testedT they+re removed "e#ore the application is pu"lished

C*he minimum level o# the -ndroid -!I that the application re0uires

C*he list o# the li"raries that the application must "e linked against

3hit all theses elements, an application can "e created So i+ll e&plain my #irst application which was

a *ask 'iller

2.2.2 !he pro"ect

For my #irst application, I was not really com#orta"le with android, so in this application there is only

two di##erents screen, and so two di##erents activities, "ut it was a good training to try how to communicate

"etween the activities, how to display elements /*e&tiew, Guttons 1 on the screen and how to interact

with them

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*he #irst screen is drawn in a linear layout which is the simplest layout mechanism availa"le on

-ndroid you can add components hori5ontally or vertically *his is a pretty simple way o# getting

components assem"led on a screen (ou can #ind the ML code #or this screen in the -ppendi&es -s you

will see, there is one *e&tiew, two "uttons and again one *e&tiew

*he two "uttons have "een declared in the ML #ile, "ut it is not enough #or them #or "eing active I

must declare them in the code4

private Gutton okGuttonT

private Gutton 0uitGuttonT

*hen you instantiate the "uttons4 they are linked with those o# the &ml #ile as #ollows4

okGutton /Gutton1 #indiewGyId/ido'1T

0uitGutton /Gutton1 #indiewGyId/id0uitter1T

In this way it is now possi"le to interact with the "uttons, thanks to the ne&t method4

GuttonsetOn)lickListener/On)lickListener listener1

*he aim o# the +O'+ "utton is to access the process list, so to a new screen and thus a new activity4

we will have a new Intent as e&plained previously *he action on the "utton code is as #ollow 4

okGuttonsetOn)lickListener/new On)lickListener/1 V

pu"lic void on)lick/iew v1 V

tryV

Intent i new Intent/*askManagerthis, !rocessListclass1T

start-ctivity/i1T

#inish/1T

W

catch/E&ception e1

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V

*e&tiew e& new *e&tiew/*askManagerthis1T

e&set*e&t/etoString/11T

set)ontentiew/e&1T

Loge/thisget)lass/1getSimple%ame/1, Erreur; 4, e1T W

W

W1T

*o start an activity it is necessary to declare an intent and then implement it with what is called the

conte&t /current activity1 and the name o# the class that de#ines the ne&t event /this one e&tends the

-ctivity class1 *he ne&t screen is a list o# processes currently running on the device

you must know that when the #irst o# an application+s components needs to "e run, -ndroid starts a

Linu& process #or it with a single thread o# e&ecution Gy de#ault, all components o# the application run in

that process

*o view this list several things are essential Firstly, activity that allows the display o# the list is a

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List-ctivity, which allows com"ined with the ML #ile,the display o# a screen with a list For the ML #ile it is

simply a *e&tiew For the code itsel# there are several things to e&plain

First, to retrieve in#ormation on the processes, youmust declare the o"ject -ctivityManager It must then

instanciate it so that it retrieves the system datas, and especially datas a"out activities *hen, the goal is torecover all the processes running, so we need a list to store data o# each process *his gives4

androidapp-ctivityManager activityManager T

activityManager /-ctivityManager1thisgetSystemService/ACTIVITY_SERVICE1T

ListNunning-pp!rocessIn#oP procIn#osT

procIn#os activityManagergetunning-pp!rocesses/1T

*o then display the names o# the process /which will "e strings1, I created a list o# strings,

and I picked the name o# each process It only remains then to show it on screen, I needed #or this

a SetList-dapter, which converts the list into a viewa"le list *his gives4

-rrayListNStringP stringList new -rrayListNStringP/1T

#or /int i T iN procIn#ossi5e/1 T iJJ1

V

stringListadd/procIn#osget/i1process%ame1T

W

setList-dapter/new -rray-dapterNStringP/this, layoutlist, stringList11T

*he last step is to de#ine the action to per#orm when the user clicks on a process


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androidos!rocesskillProcess/procIn#osget/position1pid1T

procIn#osclear/1T

procIn#os activityManagergetunning-pp!rocesses/1T

i#/XstringList;isEmpty/11V

stringList;clear/1T

W

#or /int i T iN procIn#ossi5e/1 T iJJ1

V

stringList;add/procIn#osget/i1process%ame1T

W

setList-dapter/new -rray-dapterNStringP/!rocessListthis, layoutlist, stringList;11T

Listiew lv getListiew/1T

lvset*e&tFilterEna"led/true1T

W

W1T

W


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*-( Second pro+ect :

*-(-, ata#ases

For the second project, I needed to learn a new thing4 how to use data"ases in -ndroid I can use

data"ases #or $EE, "ut in android is di##erent In #act there are readyCmade #unctions to manipulate s0lite

which is the data"ase "uilt into android In this part o# the report, I will not reCe&plain the mechanisms

already e&plained that were resolved such as how to display a te&tview or a list

*o use a data"ase, we will create a class called


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For these three sections, I will need to use B ta"les For each situation I+ll use a ta"le *he

dictionary section, o##ers a ta"le o# English words, translated into $apanese *he ta"le has three

columns which are I., wordD, word;4

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For this ta"le, I made a class .ictionnary


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s"append/3ords "eginning "y +s+4Zn1T

#or /String name 4 names1 V

s"append/name J Zn1T

W

set)ontentiew/layoutdictionnary1T

tv /*e&tiew1 .ictionnarythis#indiewGyId/idt!1T

Logd/E-M!LE, names si5e C J namessi5e/11T 66.ictionnarythisoutput /*e&tiew1

.ictionnarythis#indiewGyId/idoutQte&t1T

tvset*e&t/s"toString/11T

returnGutton /Gutton1

.ictionnarythis#indiewGyId/idret"rn_#"tton1T

returnGuttonsetOn)lickListener/new On)lickListener/1 V

pu"lic void on)lick/iew v1 V

Intent i new Intent/.ictionnarythis, .ictionnaryclass1T

start-ctivity/i1T

#inish/1T W

W1T

W

catch/E&ception e1

V

*e&tiew e& new *e&tiew/.ictionnarythis1T

e&set*e&t/etoString/11T

set)ontentiew/e&1T

Loge/thisget)lass/1getSimple%ame/1, Erreur; 4, e1T

W

W

W1T

*he class has an o"ject .ictionary


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W

*he #unction 0uery/TABLE_NAME, new String[\ V wordD , word; W, wordD like

+JlettertoLower)ase/1JA+ or wordD like +JlettertoUpper)ase/1JA+, null, null, null, wordD asc1 is

e0uivalent as the s0l re0uest 4 select wordD, wor; in *-GLEQ%-ME /here it+s dicionary1 where wordD like +s

A+ or wordD like +SA+ order "y wordD asc *he select #untion returns all the translations in a list, shown on

the screen as #ollowed

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*he situations section allows the user to "e a"le to #ind translated sentences depending on the

situation in which he is For e&ample, i# he is in a store, he has a choice o# phrases such as how much does

it cost7 -t the inter#ace level, this works in much the same way as the dictionary e&cept that the ta"le is

di##erent4

and that the select #unction now corresponds to select wordD, word; in situations 3


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egarding the Brd section, there is a ta"le where the user can add, edit, delete, and o# course consult his

own translations *he ta"le used has the same pattern as the dictionary ta"le *he mechanism o# the


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2)

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I# the user wants to see the translations, it+ll "e like the dictionary and #or the re0uest it+s a simple

SELE)* wordD, word; #rom translations

egarding the addition, the user is #aced with this screen4

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*o add, the user must enter an English word and a $apanese translation in the corresponding #ields *here is

a test on the #ields, so when the user let a #ield "lank or let +phrase D+ #or the #irst #ield or +phrase ;+ #or two

#ields, he must repeat the process and a message error appears4

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I# the #ields are properly #illed, the application e&ecute the #ollowing s0l4 insert into situations values

/+Nphrase DP+, +Nphrase ;P+1T the translation is added to the ta"le and the user is redirected to the main

screen

*o change a translation, the user arrives on a list with all traductions -ll he will have to do is click on

the translation that has to "e amended,he will "e redirected to a modi#ication screen similar to the addition

screen, "ut with #ields preC#illed with the words o# the translation


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Finally, #or the delete part, the user arrives on a list o# translations, and pick the translation that he

wants to delete *here is o# course a con#irmation screen to "e sure that the user makes no error I# the user

cancels, he returns to the list, i# the 0uery is e&ecuted and he is redirect to the translations menu *he s0l

re0uest is4 delete #rom translations 3


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(- 1hat did ! learn 2

(-,- Technical%

First o# all I gained additional skills in the $ava programming language that was di##icult #or me

"e#ore I learned also how to use a lot o# the components in eclipse such as the de"ugger I also learned a

new language that is ML, a language I didn+t know at all earlier Finally, this project allowed me to use my

s0l skills ac0uired during my studies

(-*- /u'anl%

*his placement and this project "rought me a lot o# things on a human level First in relation to it

mysel# I had to ac0uire a large autonomy Indeed I knew nothing a"out android "e#orre, and I had to learn

how to use, and create things on android "y mysel# *his "rought me a lot *his autonomy is also linked to a

research spirit I had to try to #ind e&amples "y mysel# in the "ook written in $apanese, try to test new

things, #or having nowhere to #ind answers Finally I was a"le to ac0uire through this course and also thanks

to the project a "etter english

Conclusion

*hanks to this internship, which was also planned #or this, I discovered a country,a culture,and

"eauti#ul people also learned new skills, and used all the things that I learned #or two years I do not regret

anything in this e&perience and I thank all those who have allowed such a thing #easi"le *he $apanese will

remain #orever engraved in my memory and I hope #rom my heart to come "ack one day and discover still

other aspects o# this country so singular that is $apan *he people I met here are not just classmates,

roommates and pro#essors, they are #riends, and once again I thank you all

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Appendi;es

!oices for students to become engineers

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"e#as Instruments $MA% &$$M'

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ode XM( for t!e first screen of t!e task killer

N7&ml versionD encodingut#C97P

NLinearLayout android4orientationvertical

android4layoutQwidth#illQparent

android4layoutQheight#illQparent &mlns4androidhttp466schemasandroidcom6apk6res6androidP

N*e&tiew

android4idRJid6te&t


android4layoutQheight;9dip

android4te&tRstring6welcomeQmessage

android4gravitycenter

android4te&tStyle"old6P

NGutton

android4idRJid6o'

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android4layoutQwidthDdip

android4layoutQheightwrapQcontent

android4layoutQ"elowRid6te&t

android4layoutQgravitycenter

android4te&tEnter6P

NGutton

android4idRJid60uitter android4layoutQwidthDdip

android4layoutQheightwrapQcontent

android4layoutQ"elowRid6o'

android4layoutQgravitycenter

android4te&tKuit6P

N*e&tiew

android4idRJid6te&t;


android4layoutQheight#illQparent

android4layoutQ"elowRid6o'

android4te&tRstring6rights android4gravity"ottom6P

N6LinearLayoutP

ANDROID SYSTEMS

Documents

Android Report Internship