THE BMI CALCULATOR PROJECT THE WALKTHROUGHroumani/walkthrough/Walkthrough.pdf · Mobile, Android (min = Ice Cream) § Input - Weight (kg) and Height (m), both real - Two text boxes,

DevelopmentWalkthrough

ProfHRoumani 1

ADEVELOPMENTWALKTHROUGH

PROFHROUMANIDeptofElectricalEngineering&ComputerScience

THEBMICALCULATORPROJECT

THEWALKTHROUGH

1.  THEPROCESS

2.  REQUIREMENT

3.  DESIGN4.  THEPROJECT

5.  THEVIEW

6.  THECONTROLLER

7.  THEMODEL

8.  TESTING9.  DEPLOYMENT

A.  THEMAKING*




THEPROCESS


ProfHRoumani 2

•  RequirementAnalysis

•  Design

•  ImplementaFon

•  TesFng

•  Deployment

REQUIREMENTS

DESIGN

IMPLEMENTATION

TESTING

DEPLOYMENT

Thewaterfallmodelcarriesrisks:•  Requirement-change,•  Architectural,and•  Assump3on.

Tomi[gate,•  Implementitera[vely,processwise.•  Incorporatefeaturesincrementally.


ProfHRoumani 3




REQUIREMENT


ProfHRoumani 4

OverallThePla]ormandtheUI.

InputMechanism,informa[ontype,valida[onrules.

OutputMechanism,informa[ontype,forma^ng.

§ Pla]ormMobile,Android(min=IceCream)

§ Input-Weight(kg)andHeight(m),bothreal-Twotextboxes,prompts,acomputebueon-Novalida[oninthisfirstrelease

§ Output-Theindexroundedto1decimal-Noforma^nginthisfirstrelease


ProfHRoumani 5




DESIGN

OverallAblueprintofhowthesoughtsystemworks.

ComplexityModernsogwaresystemsareverycomplex.Cannotbuildonefromscratchinonelife[me!

StrategyDivide;choreograph;orchestrate.

VIEW CONTROLLER MODEL

ComputeEngines

UIWidgets

LAYOUT ACTIVITY CLASS

XML JAVA JAVA

EventHandlers

LayoutManagers

StylesandThemes

DataAccess

…


ProfHRoumani 6

§ AlgorithmGiventheweightwinkgAndtheheighthinmBMI=w/h2




CREATING&ARCHIVING

THEPROJECT

CreateProjectname(nospaces).

StructureManifest,Java,andResources

Archiving-Zipthewholefolderorjustapp/src-SavetocloudoraUSBs[ck


ProfHRoumani 7




IMPLEMENTING

THEVIEW

TerminologyTextbox=EditTextLabel=TextView

KeyProper;esid,layout_width=match_parent

XMLEn[reviewrepresentedintext




IMPLEMENTING

THECONTROLLER


ProfHRoumani 8

V-to-CGlue-MethodthattakesaViewparameter-Thebueon'sonClickproperty

C-to-VGlue-findViewById(R.id….)-Casttopropertype-Surroundwithparentheses-Invoke.getText().toString()or.setText(…)

CreateanInstanceofthemodel-BMIModelmodel=newBMIModel(…);-Thisgivesusanobjectreferencemodel

Invokemethodsinthemodel-Stringanswer=model.getBMI();-C-to-M:viatheinvoca[on-M-to-C:viathereturn




IMPLEMENTING

THEMODEL


ProfHRoumani 9

AFributes(thestate)privatesome-typesome-name;

Constructor-publicclass-name(parameters)-Setthestate

Method-publicreturn-typesome-name(…)-Returnsomethingifnotvoid.




TESTING

ForVandC•  Physicaldevice•  Framework(e.g.Mokito)

ForM:•  psvm(input=Scanner,output=System.out)•  JUnit

TestCases:Needanoracle.Coverageisimportant.


ProfHRoumani 10




DEPLOYMENT

1. Turndeviceon2. PluginUSBcable3. GrabdeviceinVBox4. Run(greenarrow)5. AllowindeviceNote:Aboveassumesdevicehasdeveloper'smodeon;USBdebuggingallowed;andVBoxacceptsthevendorin/etc/udev/rules.99/.

Documents

THE BMI CALCULATOR PROJECT THE WALKTHROUGHroumani/walkthrough/Walkthrough.pdf · Mobile, Android (min = Ice Cream) § Input - Weight (kg) and Height (m), both real - Two text boxes,