MOBILE DEVELOPMENT

CHRIS FRANZSYSTEMS CONSULTANT / ADVANTAGE EVANGELIST

MAY 2011

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AGENDA

• Introduction• iOS• Android• Windows 7 Phone

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INTRODUCTION

• Picking a platform & development environment–Market share– Devices (features, cost)– Development community

User groups Packages or libraries available

– Cost of development Developer license

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PLATFORMS

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IPOD TOUCHIPHONEIPAD

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OVERVIEW

• Supported Devices– iPod Touch– iPhone– iPad

• Development Tools– xCode v3.2 and Interface Builder or xCode v4–Objective-c– Emulators for iPhone and iPad

• Recommended Reading: Head First iPhone Development by Dan & Tracey Pilone

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APPLICATION ARCHITECTURE

• Follows MVC Model• Application Components– Views– Frameworks– Resources

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ODATA OBJECTIVE-C CLIENT

• Available from Codeplexhttp://odataobjc.codeplex.com• Consists of Two Components–MSODataLib– oDataGen

• Using With Your Project– Add location of MSODataLib source to project Header Path– Add location of libMSODataLib.a to project Library Path– Add libMSODataLib.a to project Frameworks

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GENERATING DATA CLASSES

• oDataGen creates data classes based on the metadata provided by the Advantage Web API• Syntaxodatagen /uri=<data service Uri> [/out=<output file path>] [auth=windows|acs /u=username /p=password [/sn=servicenamespace [/at=appliesto] ] [/ups=yes|no] ]

• Exampleodatagen /uri=https://localhost:6282/adsweb/example_db/1/ /out=/Users/chrisfranz/projects/tasksapp /u=adssys

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EXAMPLE CLASS/** * @interface:Tasks * @Type:EntityType * @key:id* */@interface tasks_Model_Entities_Tasks : ODataObject{

/*** @Type:EntityProperty* NotNullable* @EdmType:Edm.Int32*/NSNumber *m_id;

/*** @Type:EntityProperty* NotNullable* @EdmType:Edm.Decimal*/NSDecimalNumber *m_rowversion;

/*** @Type:EntityProperty* @EdmType:Edm.String* @MaxLength:50* @FixedLength:true*/NSString *m_name;

/*** @Type:EntityProperty* @EdmType:Edm.DateTime*/NSDate *m_started;

/*** @Type:EntityProperty* @EdmType:Edm.DateTime*/NSDate *m_finished;

}

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EXAMPLE CLASS

@property ( nonatomic , retain , getter=getid , setter=setid )NSNumber *m_id;@property ( nonatomic , retain , getter=getrowversion , setter=setrowversion )NSDecimalNumber *m_rowversion;@property ( nonatomic , retain , getter=getname , setter=setname ) NSString *m_name;@property ( nonatomic , retain , getter=getstarted , setter=setstarted )NSDate *m_started;@property ( nonatomic , retain , getter=getfinished , setter=setfinished )NSDate *m_finished;

+ (id) CreateTasksWithid:(NSNumber *)aid rowversion:(NSDecimalNumber *)arowversion;- (id) init;- (id) initWithUri:(NSString*)anUri;@end

+ (id) CreateTasksWithid:(NSNumber *)aid rowversion:(NSDecimalNumber *)arowversion;- (id) init;- (id) initWithUri:(NSString*)anUri;@end

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INITWITHURI METHOD- (id) initWithUri:(NSString*)anUri { if(self=[super initWithUri:anUri]) { [self setBaseURI:anUri]; m_OData_hasStream.booleanvalue=NO; mProperties *obj;

obj=[[mProperties alloc]initWithEdmType:@"Edm.Int32" MaxLength:@"" MinLength:@"" FixedLength:NO Nullable:NO Unicode:NO ConcurrencyMode:@"" FC_TargetPath:@"" FC_KeepInContent:YES FC_SourcePath:@"" FC_ContentKind:@"" FC_NsPrefix:@"" FC_NsUri:@""]; [m_OData_propertiesMap setObject:obj forKey:@"m_id"]; [obj release];

obj=[[mProperties alloc]initWithEdmType:@"Edm.Decimal" MaxLength:@"" MinLength:@"" FixedLength:NO Nullable:NO Unicode:NO ConcurrencyMode:@"" FC_TargetPath:@"" FC_KeepInContent:YES FC_SourcePath:@"" FC_ContentKind:@"" FC_NsPrefix:@"" FC_NsUri:@""]; [m_OData_propertiesMap setObject:obj forKey:@"m_rowversion"]; [obj release];

obj=[[mProperties alloc]initWithEdmType:@"Edm.String" MaxLength:@"50" MinLength:@"" FixedLength:YES Nullable:NO Unicode:YES ConcurrencyMode:@"" FC_TargetPath:@"" FC_KeepInContent:YES FC_SourcePath:@"" FC_ContentKind:@"" FC_NsPrefix:@"" FC_NsUri:@""]; [m_OData_propertiesMap setObject:obj forKey:@"m_name"]; [obj release];

obj=[[mProperties alloc]initWithEdmType:@"Edm.DateTime" MaxLength:@"" MinLength:@"" FixedLength:NO Nullable:NO Unicode:NO ConcurrencyMode:@"" FC_TargetPath:@"" FC_KeepInContent:YES FC_SourcePath:@"" FC_ContentKind:@"" FC_NsPrefix:@"" FC_NsUri:@""]; [m_OData_propertiesMap setObject:obj forKey:@"m_started"]; [obj release];

obj=[[mProperties alloc]initWithEdmType:@"Edm.DateTime" MaxLength:@"" MinLength:@"" FixedLength:NO Nullable:NO Unicode:NO ConcurrencyMode:@"" FC_TargetPath:@"" FC_KeepInContent:YES FC_SourcePath:@"" FC_ContentKind:@"" FC_NsPrefix:@"" FC_NsUri:@""]; [m_OData_propertiesMap setObject:obj forKey:@"m_finished"]; [obj release];

NSMutableArray *anEntityKey=[[NSMutableArray alloc]init]; [anEntityKey addObject:@"id"]; [m_OData_entityKey setObject:anEntityKey forKey:@"Tasks"]; [anEntityKey release]; } return self;}

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ACCESSING ADS DATA

// Get all tasks from our servicetasksData *proxy = [[tasksData alloc]

initWithUri:@"http://server:6272/adsweb/example_db/v1/" credential:nil];QueryOperationResponse *response = [proxy execute:@"Tasks"];_tasksArray = [response getResult];[_tasksArray retain];NSLog( @"got %d tasks back", [_tasksArray count] );

// Log contents of first row as an exampleTasks *task = [_tasksArray objectAtIndex:1];NSLog( @"Row1: TaskName: %@ StartDate: %@",       [task getname],       [task getstarted] ? [[task getstarted] description] : @"Not Yet" );

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ANDROID

ANDROID

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OVERVIEW

• Android OS - http://www.android.com/– Android is an open source mobile platform– Developed by the Open Handset Alliance– Strongly driven by Google– Supports multiple devices and carriers

• Development – http://developer.android.com/– Built on Linux micro kernel– Applications written in Java– SDK and emulator are free– Eclipse IDE with plug-in is used for development

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APPLICATION OVERVIEW

• Architecture– Applications do not exit– UI can be paused, resumed, or terminated by system at

anytime– A single thread handles all UI for entire device

No blocking or long calls in UI thead

• Building Blocks– Activities– Service and Content Providers– Intents and Broadcast Receivers

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DESIGN PATTERNS FOR DATA ACCESS

• Three suggested design patterns– Content Provider API– Content Provider API with SyncAdapter– Service API

• Video from Google IO 10 covers all three patterns– http://www.google.com/events/io/2010/sessions/developin

g-RESTful-android-apps.html

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CONTENT PROVIDER API PATTERN

Activity and CursorAdapter

Content Provider

Asynchronous Service

oData Client

Processor

1. query, insert, update, delete

7. notification

2. startService(intent) 5. returned data

3. oData request

4. GET/POST/

PUT/DELETE

6. update\insert

8. requery

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CONTENT PROVIDER API PATTERN

• Activity and Cursor Adapter– Displays data– Use ContentObservers to receive notifications of data

changes– Should re-query data when notified– Android CursorAdaptors and ListViews handle notifications

automatically• Content Provider– Caches data in local SQLite database– Requests oData call from Asynchronous Service– Returns local cached data– Sends notifications when data changes

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CONTENT PROVIDER API PATTERN

• Asyncronous Service– Sets up oData request– Checks for existing oData request– Registers the Processor callback with the thread– Starts new thread to perform oData request– Handles callback even if requesting Activity is terminated

• Processor– Callback used to process results from oData query– Uses the Content Provider to update local SQLite database

Causes Content Provider to notify observers

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ODATA CLIENT

• Two existing oData clients for Android– Restlet http://www.restlet.org/– oData4j http://code.google.com/p/odata4j/

• Both clients work with Advantage and are actively being developed• Provide slightly different licenses

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EXAMPLEimport org.restlet.ext.odata.Query;import com.advantage.example.android.quick.task.tasks.model.entities.Tasks;

public class Main extends Activity { private static final String TAG = Main.class.getSimpleName(); /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); TasksModelService model = new TasksModelService();; Query<Tasks> query = model.createTasksQuery("/Tasks"); try { query.execute(); } catch (Exception e) { e.printStackTrace(); } for ( Tasks task : query) { Log.i(TAG, task.getName()); } }}

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WINDOWS PHONE 7

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WINDOWS 7 PHONE

• Tools– Visual Studio 2010 (express is free, even for commercial use)–Windows Phone 7 Developer Tools (work in progress)– Phone emulator works very well

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CONNECTING TO ADS

oData Proxy Class or Object - Add Service Reference dialog

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ACCESSING ADS DATA

• Use the proxy class (object) to access tables

Uri serviceUri = new Uri( “http://localhost:6272/adsweb/example/v1" );

Context = new testddData( serviceUri );

IEnumerable<Customers> query;

query = from c in context.Customers select c;

IList<Customers> cList = query.ToList();

foreach ( Customers c in cList )

Console.WriteLine( "{0,4} {1,10} {2,10}", c.ID, c.Name, c.Location );

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SILVERLIGHT

private void Window_Loaded( object sender, RoutedEventArgs e ){ var context = new testdd.testddData( new Uri( “http://localhost:6272/adsweb/example/v1" ));

var query = from c in context.Customers select c;

DataContext = query.ToList();}

<TextBox Text="{Binding Location}" Name="txtLocation" />

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MORE

• Example videos on MSDN– http://msdn.microsoft.com/en-us/data/cc300162