03 midp
- 1. Mobile Information Device Profile Cornelius Koo - 2005
- 2. Hardware Requirements • Screen dimension at least 96x54 pixels • At least one type of user input available, eg. one handed keyboard • 128 kb non-volatile memory to run Mobile Information Device (MID) components • At least 8 kb of non-volatile memory for applications to store persistent data • 32 kb of volatile memory to run Java • Wireless network connectivity
- 3. Software Requirements • OS running on device must provide minimal scheduling, exception handling and processing of interrupts. • Able to run JVM • Must support writing of bitmapped graphics to the display • The software must accept input and pass the information to the JVM • able to read and write to/from non-volatile memory
- 4. MIDP Architecture OEM = Original Equipment Manufacturer
- 5. MIDlet & MIDlet Suite • MIDlet : Java App. Designed to be run on mobile application • MIDlet Suite : Consists of on or more MIDlet packaged on .jar file
- 6. Application Manager • Software on a mobile device that is responsible for installing, running and removing MIDlets • This software is device-dependent
- 7. Application Manager • When Application Manager runs it will make these available : • Access to CLDC & JVM • Access to MIDP defined class • Access to JAR file • Access to Java Application Descriptor File
- 8. MIDlet Java Archive (JAR)
- 9. Six Must-Exist Entry • MIDlet-Name • MIDlet-Version • MIDlet-Vendor • MIDlet-<n> • MicroEdition-Profile • MicroEdition-Configuration Must exist in the Manifest file
- 11. Example Manifest-Version: 1.0 MicroEdition-Configuration: CLDC-1.0 MIDlet-Name: Basic Midlets Midlet Suite MIDlet-Vendor: Midlet Suite Vendor MIDlet-1: HelloWorld,,HelloWorld MIDlet-2: HelloWorld,,HelloWorld MIDlet-3: HelloWorld2,,HelloWorld2 MIDlet-Version: 1.0.1 MicroEdition-Profile: MIDP-2.0
- 12. Java Application Descriptor (JAD)
- 13. Why JAD ? • Provide the application manager with information about the contents of a JAR, so that it can decide whether a MIDlet suitable to run on the device or not. • Provide a means for parameters to be passed to a MIDlet without changing the JAR file.
- 14. Must-Exist Entry • MIDlet-Name • MIDlet-Version • MIDlet-Vendor • MIDlet-<n> • MIDlet-Jar-URL • MIDlet-Jar-Size
- 16. Example MIDlet-Jar-Size: 1783 MIDlet-1: HelloWorld,,HelloWorld MIDlet-2: HelloWorld,,HelloWorld MIDlet-3: HelloWorld2,,HelloWorld2 MIDlet-Jar-URL: Basic_Midlets.jar MicroEdition-Configuration: CLDC-1.0 MIDlet-Version: 1.0.1 MIDlet-Name: Basic Midlets Midlet Suite MIDlet-Vendor: Midlet Suite Vendor MicroEdition-Profile: MIDP-2.0
- 17. Reference • Core J2ME Technology and MIDP. John W. Muchow. Prentice Hall PTR, 2002.