Java User’s Guide

6.2 MIDlet Life Cycle

s

•notifyDestroyed() – the MIDlet notifies the application management software that it has cleaned up and is done.

Note: the only way to terminate a MIDlet is to call notifyDestroyed(), but destroyApp() is not automatically called by notifyDestroyed(). You must not terminate your midlet (i.e. having no threads left) and not calling notifyDestroyed() before.

•notifyPaused() – the MIDlet notifies the application management software that it has paused

•resumeRequest() – the MIDlet asks application management software to be started again.

Table 9: A typical sequence of MIDlet execution

Application Management Software

MIDlet

 

 

The application management software creates a new instance of a

The default (no argument) con-

MIDlet.

structor for the MIDlet is called; it

 

is in the Paused state.

 

 

The application management software has decided that it is an

The MIDlet acquires any

appropriate time for the MIDlet to run, so it calls the MIDlet.startApp

resources it needs and begins to

method for it to enter the Active state.

perform its service.

 

 

The application management software no longer needs the applica-

The MIDlet stops performing its

tion be active, so it signals it to stop performing its service by calling

service and might choose to

the MIDlet.pauseApp method.

release some resources it cur-

 

rently holds.

 

 

The application management software has determined that the

If it has been designed to do so,

MIDlet is no longer needed, or perhaps needs to make room for a

the MIDlet saves state or user

higher priority application in memory, so it signals the MIDlet that it

preferences and performs clean

is a candidate to be destroyed by calling the MIDlet.destroyApp

up.

method.

 

 

 

wm_java_usersguide_v12

Page 51 of 123

2008-02-25

Confidential / Released

 

 

Page 50 Page 52
Page 51
Image 51
Siemens XT65, TC65, AC65, XT75 manual Application Management Software MIDlet
Page 50 Page 52

AC65, XT65, XT75, TC65 specifications

The Siemens TC65 is a compact and powerful GSM/GPRS module designed for a wide range of mobile communication applications. With its robust features, the TC65 perfectly meets the growing demands for connectivity in various industries, including automotive, telematics, and industrial automation.

A standout feature of the TC65 is its compact size, allowing it to be easily integrated into various devices without compromising on performance. The module supports GSM (Global System for Mobile Communications) and GPRS (General Packet Radio Service), providing reliable and efficient voice and data transmission.

One of the key technologies incorporated in the TC65 is its integrated TCP/IP stack, which allows for seamless internet connectivity and enables application developers to create IoT solutions with ease. This capability is essential for remote monitoring, data logging, and other applications that require continuous data exchange.

The TC65 also boasts extensive multimedia capabilities, including support for SMS, MMS, and voice calls. This makes it suitable for applications that require not only data transmission but also communication features. Additionally, it supports various codecs for voice compression, ensuring high-quality audio in voice applications.

Enhanced security features are another highlight of the TC65. It incorporates comprehensive security protocols to safeguard data transmission, making it suitable for sensitive applications in finance, healthcare, and other critical sectors. The module also includes an integrated SIM application toolbox that supports the development of secure and customizable applications.

For developers, the TC65 offers an easy-to-use software development kit (SDK), simplifying the process of application development. This means that businesses can quickly create and deploy solutions tailored to their specific needs.

The module operates across a wide voltage range and is designed to tolerate challenging environmental conditions, making it ideal for industrial use. It supports various interfaces, including UART, GPIO, and I2C, enabling it to connect with a variety of peripherals and sensors, thus expanding its usability.

In summary, the Siemens TC65 combines compact design, versatile communication capabilities, advanced security features, and developer-friendly resources, making it an excellent choice for anyone looking to implement reliable and sophisticated GSM/GPRS communication in their applications. The TC65 is a valuable asset in the evolving landscape of connected devices and IoT solutions.
Top Page Image Contents