midp3.0 overview

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09 November 2007 www.mobilemediaconsult.com 1

MIDP3.0 OVERVIEW

What is new in MIDP3.0?

• Enhanced LCDUI• LIBlets - Shared code between MIDlets• Concurrency - Execute more that one MIDlet at same time• Application and System Events• Inter MIDlet Communication - IMC• Application Level Access Control - APLAC• Screen Saver MIDlet• Auto Start & Controlling User actions on MIDlets• Provisioning Record Stores - OTA RMS



MIDP3.0 OVERVIEW

MIDP3.0 JSR 271

• Expert group formed in March 2005• Expert Group Lead by Mike Milikich from Motorola• Over 100 members including:

• Device Manufacturers• Network Operators• Application & Content Developers• VM Vendors



MIDP3.0 OVERVIEW

MIDP3.0 Release date

• Final Approved Version Expected Q2-2008



MIDP3.0 OVERVIEW

MIDP3.0 LCDUI – High Level

• Custom layout support:• Application controls Layout of items in a Form

• Flow and Table Layout• Commands

• Improved placement control• Sub – Commands• Icons

• Tabbed Panes – each pane contains a Screen• Idle Item support• Image Item to support GIF / animated GIF



MIDP3.0 OVERVIEW

MIDP3.0 LCDUI – Low Level

• Support for multiple Displays and orientations• Alpha blending• Image enhancements

• Animated Images• Transparent mutable Images• Scaling and rotation

• Application-provided Fonts• Splash screens



MIDP3.0 OVERVIEW

LIBlets

• Shareable components that one or many midlets can use• Expose a set of API’s and resources that a MIDlet can use• Inert code and resource fragments that only execute within a MIDlet context.• Save static footprint size by preventing LIBlet code packaged in each MIDlet.• Potentially reduce download times for applications



MIDP3.0 OVERVIEW

LIBlets

• LIBlet code does not execute by itself• LIBlet is executed in the MIDlet’s execution enviroment• A binding: act of loading a MIDlet with all associated LIBlets into a single execution enviroment.• Jars are all in the classpath



MIDP3.0 OVERVIEW

Concurrency

• Multiple MIDlets: AMS provides a means to launch multiple applications• MIDlets in the background, not visible to the user• Auto Start MIDlets• Screen Saves MIDlets



MIDP3.0 OVERVIEW

Application and System Events

• MIDlets can generate applicatino events• MIDlets can listen to System events

• Battery• power on/off• idle event

• Push registration on events:• Application launch on event• launch application on flip/close



MIDP3.0 OVERVIEW

Inter MIDlet Communication (IMC)

• Communication between multiple running MIDlets• Low-level bi-directional stream connection within the device• GCF based – Connector.open(“imc://...”);• An IMC Server is created with a name, and the client tries to connect to this named service.

MIDlet A

IMCConnection

MIDlet B

IMCServerConnection



MIDP3.0 OVERVIEW

APLAC

• Application Level Access Control (APLAC)• MIDlets interact via Events, IMC, RMS• Restrinct interactions based on

• Domain• Signer• Vendor

• E.g. Share a record store only with MIDlets that are developed by a specific Vendor

midp3.0 overview

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