004 Bada Basics Fundamentals&UI

8/8/2019 004 Bada Basics Fundamentals&UI

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Basics:

Fundamentals & UI

bada API overview

1. bada namespaces2. Privilege levels and groups

bada namespaces

User interactive features Service oriented featuresBasic bada features

Osp::App

Osp::Base

Osp::Io

Osp::Locales

Osp::Net

Osp::Security

Osp::System

Osp::Telephony

Osp::Graphics

Osp::Media

Osp::Ui

Osp::Uix

Osp::Web

Osp::Commerce

Osp::Content

Osp::Locations

Osp::Messaging

Osp::Social

Osp::Text

Kernel

Device

Service

Namespaces – basic bada

Osp::App

Osp::Base

Osp::Io

Osp::Locales

Osp::Net

Osp::Security

Osp::System

Osp::Telephony

Osp::Graphics

Osp::Media

Osp::Ui

Osp::Uix

Osp::Web

Osp::Commerce

Osp::Content

Osp::Locations

Osp::Messaging

Osp::Social

Osp::Text

Kernel

Device

Service

Osp::Base

Fundamental bada

classes:

String, ArrayList,Thread,Math …

Basic bada features

Osp::App

Osp::Base

Osp::Io

Osp::LocalesOsp::Net

Osp::Security

Osp::SystemOsp::Telephony

Osp::Text

Namespaces – User Interactive

Osp::App

Osp::Base

Osp::Io

Osp::Locales

Osp::Net

Osp::Security

Osp::System

Osp::Telephony

Osp::Graphics

Osp::Media

Osp::Ui

Osp::Uix

Osp::Web

Osp::Commerce

Osp::Content

Osp::Locations

Osp::Messaging

Osp::Social

Osp::Text

Kernel

Device

Service

User interactive features

Osp::Graphics

Osp::Media

Osp::Ui

Osp::Uix

Osp::Web

Osp::Uix

Extended user

interaction functions:Touch, snap,Sensors …

Namespaces – User Interactive

Osp::App

Osp::Base

Osp::Io

Osp::Locales

Osp::Net

Osp::Security

Osp::System

Osp::Telephony

Osp::Graphics

Osp::Media

Osp::Ui

Osp::Uix

Osp::Web

Osp::Commerce

Osp::Content

Osp::Locations

Osp::Messaging

Osp::Social

Osp::Text

Kernel

Device

Service

User interactive features

Osp::Graphics

Osp::Media

Osp::Ui

Osp::Uix

Osp::Web

Browser control API

Namespaces – Service Oriented

Osp::App

Osp::Base

Osp::Io

Osp::Locales

Osp::Net

Osp::Security

Osp::System

Osp::Telephony

Osp::Graphics

Osp::Media

Osp::Ui

Osp::Uix

Osp::Web

Osp::Commerce

Osp::Content

Osp::Locations

Osp::Messaging

Osp::Social

Osp::Text

Kernel

Device

Service

Service oriented features

Osp::Commerce

Osp::Content

Osp::Locations

Osp::Messaging

Osp::Social

Osp::Content

Local and remotecontentmanagement

Namespaces – Service Oriented

Osp::App

Osp::Base

Osp::Io

Osp::Locales

Osp::Net

Osp::Security

Osp::System

Osp::Telephony

Osp::Graphics

Osp::Media

Osp::Ui

Osp::Uix

Osp::Web

Osp::Commerce

Osp::Content

Osp::Locations

Osp::Messaging

Osp::Social

Osp::Text

Kernel

Device

Service

Service oriented features

Osp::Commerce

Osp::Content

Osp::Locations

Osp::Messaging

Osp::Social

Osp::Locations

Interaction,visualisation oflocations and

Privilege levels

Privilege levels are related to your developermembership

Regulate access to the platform and user-sensitive data

Every privilege level allows access to differentprivilege groups (= functionalities)

Level DescriptionNone-privileged Does not require any privileges.

Normal Usable by all bada developer.

System Usable only by Samsung developer partners.

Coding idioms

1. Exception handling

2. Two phase construction

3. Memory handling4. Virtual path

Exception handling (1/3)

bada does not use standard C++ exceptionhandling

All exceptions are caught by using the bada

specific result typeExamples for result error types:

Error Type Description

E_SUCCESS The method was successful

E_OUT_OF_MEMORY Insufficient memory

E_SYSTEM A system error occurred

Exception handling (3/3)

Check the last result using GetLastResult() – If an operation returns null:

DirEnumerator * pEnum = dir. ReadN ();

if (pEnum == null){

AppLog( "Directory::ReadN() failed with error: %s" ,GetErrorMessage ( GetLastResult ()));

return false ;

Two phase construction (1/2)

bada uses a two phase constructionWhy? – bada does not use standard C++ exception

mechanism to increase runtime efficiency – And to prevent resource leaks in C++How? – The resource allocation logic is performed in

an extra Construct() method – The destructor follows traditional C++

conventions

Two phase construction (2/2)

Example:result r = E_SUCCESS;

// 1. Phase: create objectCallManager *pCallManager = new CallManager();

// 2. Phase: initialize object (+allocations)r = pCallManager-> Construct();

if(IsFailed(r)){delete pCallManager;

Memory handling (1/3)

Ownership policy: – The “owner” of an object is responsible for

deleting dynamically allocated memory

Image * pImage = new Image ();

// Some code ...

delete pImage;

Must be deleted to avoid a memory leak!

Rules for ' N' postfix methods: – The caller must delete the returned instance

after an ‘N’ postfix method is called

– Change of “ownership”

Examples for ‘N’ postfix methods: – GetContentInfoN() – DecodeN() – GetValueListN() – SearchN() – OnLandMarkReceivedN()

GetContentInfoN():

OnLandmarksReceivedN():

ContentInfo * pInfo = null;pInfo = mgr. GetContentInfoN (contentId);delete pInfo;

voidLandmarkManager:: OnLandmarksReceivedN (,

Osp::Base::Collection:: IList * pResults,,,){

if (r == E_SUCCESS && pResults) {pMainForm->DrawLandmarks(pResults);pResults->RemoveAll(true);delete pResults;

Virtual path

Directory Usage Permission

/HomeUsed to store application specific dataE.g.:String fileName(" /Home/test.txt ");

Read/Write

/Res Used to read resource files, such as for UI ormusic and video files Read-only

/Home/Share Used to share data with other bada applications Read/Write

/Share/[appid] Used to read data from other bada apps via their[appid] Read-only

Controls in bada

UI screen structure

Indicator

Softkey

FrameThe top level windowThere is one per application

Form(s)

High level containerThere can be multiple forms

Control(s)Controls are added to

Create and show a Form

Step 1: Create a Form:

Step 2: Add Form to Frame:

Step 3: Show the Form:

Form1 *pForm = new Form1();pForm-> Construct (FORM_STYLE_TITLE|

FORM_STYLE_SOFTKEY_0|FORM_STYLE_INDICATOR);

Frame *pFrame = GetAppFrame ()-> GetFrame ();pFrame-> AddControl (* pForm );

pFrame-> SetCurrentForm (* pForm );pFrame-> RequestRedraw (true); // true for Draw() & Show()

Other FORM_STYLEs:NORMAL/ TITLE/ INDICATOR/ SOFTKEY_0/ SOFTKEY_1/ OPTIONKEY/ TEXT_TAB/ ICON_TAB

Event handling

Events: – Controls: focus, drag and drop, touch, and key – Add EventListener to Control to handle events

TouchPressed

TouchMoved

TouchReleased

ITouchEventListener{

OnTouchPressed() {…}OnTouchMoved() {…}

OnTouchReleased() {…}OnTouchDoublePressed() {…}// …

Handling of Touch events

Step 1: Inherit from listener interface

Step 2: Implement event handler method

Step 3: Add event listener to control

class TouchListener : public ITouchEventListener{…}

void TouchListener ::OnTouchPressed( …, const Point & currentPosition, …)

AddTouchEventListener( ITouchEventListener &);

UI Builder tool basics

ResourceExplorer

Design Area

Properties

Controls

Application life cycle

Overall application life cycle

OnAppInitializing()

Terminated

SuccessRunning

Failure OnForeground()

OnAppTerminating()

OnBackground()

Launch

OnAppInitializing()

Invoked as soon as application is launchedInitialize application resources

bool MyPlaces::OnAppInitializing( AppRegistry & appRegistry)

{// Initialize...…return true ;

OnForeground()OnAppInitializing()

OnBackground()

OnBackground() is called whena base application is launched(e.g.: incoming calls or SMS messages)

Recommendation: – Release unnecessary

resources

– Stop heavy operations• Multimedia/graphics/etc.

OnForeground() OnBackground()

OnAppInitializing()

void MyPlaces::OnBackground( void ) {}

OnForeground()

OnForeground() is called whenthe base application is terminated

Recommendation:

– Resume normal applicationprocesses and resourceconsumption

void MyPlaces::OnForeground( void ) {}

OnForeground() OnBackground()

OnAppInitializing()

OnAppTerminating()

OnAppTerminating() is called when: – Another bada app is launched – End key is pressed – Low battery or memory

Recommendation: – Save state to the registry – Destroy unnecessary, allocated

resources

bool MyPlaces::OnAppTerminating( AppRegistry & appRegistry, bool forcedTermination)

{// save app state into appRegistry …

OnAppTerminating()

OnBackground()OnForeground()

Summary

What we have learned

bada API overview – Namepaces – Privilegesbada coding idioms

– Exception handling through result type – Two phase construction for runtime efficiency – Memory management and ‘ N’ postfix – Virtual path (/Home, /Res, etc.)UI basics – UI screen structure, controls, UI BuilderApp life cycle – 4 states

Find out more

Tutorials: – bada Tutorial.Fundamentals.pdf – bada Tutorial.Application.pdf

– bada Tutorial.UI and Graphics.pdfSamples

– BasicApp

– UiControls

3D augmented reality first person shooter

Makes use of bada to its full potential

- 360 ° OpenGL 3D graphics- Camera- Accelerometer, compass, tilt sensors- Audio feedback- Powerful hardware- To be published in SamsungApps store

Follow us on Twitter at #ROTU

by Samsung Mobile Innovator

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