Javax.microedition.midlet jar file download

Methods on the Registry are used for the advanced functions. New requests can be chained to previous requests with the invoke method. The content handler may restrict access and visibility to itself during registration. An detailed example is provided in Appendix A. Content handlers may be installed on the device either before they are needed or when they are needed.

The content handler API can be used to trigger the installation process to install the content handlers on the device. For at least one downloadable application packaging type supported by the device, the CHAPI implementation MUST provide and register a content handler to perform the installation.

The appropriate installation process for the device MUST be used to attempt to install the content handler. The installation MUST include all of the required security and user prompts as specified in the appropriate profile and download specification.

If the installation process fails for any reason, including the user's decision to cancel the installation, then the Invocation will fail with the Invocation. The status response must be delivered to the invoking application, if required in the request. Content handlers are applications and are subject to the same security, integrity, installation, upgrade, and other requirements as any other application in the applicable Java runtime environment.

Authentication of applications and application classes MUST conform to the requirements of the applicable Java runtime environment. Each Java runtime environment has its own application packaging and runtime requirements.

Each content handler application MUST conform to these requirements. Each Java runtime specifies how applications are uniquely identified, for example, by a classname of the application class.

Installation and removal of content handlers utilizes the normal mechanisms of the Java runtime environment. During installation, any content handlers MUST be registered using the attributes defined in the application packaging.

Typically, they will be present in an application descriptor or JAR manifest. When a content handler application is removed, all of the static and dynamic registrations of the content handler application MUST be released.

A goal of the Content Handler API is to promote a smooth or seamless user experience between the invoking application and content handler. Typically, if the invoking application has a user interface, one of its screens will be displayed to the user that is, it will be in the foreground. If a user action causes an Invocation then the next screen the user sees should be the content handler for that invocation. If a foreground content handler finishes with an invocation that requires a response to the calling application that had the foreground immediately before the content handler was invoked, and there are no other requests buffered or being processed from the same calling application, then the foreground is returned to the calling application.

If there is a conflict between foreground transitions and external events or explicit user actions, then the external events or user actions should take precedence. Static Registration of Content Handlers Content handler registration can, and generally should, be handled during the installation of the application. The following attributes can be included in the JAR manifest of the application.

Each Java runtime environment may define their own application packaging extensions. If the attributes are present, they MUST be used by the installation process to register the content handlers. If the application is being upgraded from a previous version then static registrations that are not replaced by new registrations are removed. Each content handler is uniquely identified by an ID.

Each static content handler registration contains the following information. Multiple registrations can be provided in an application. The first missing entry terminates the list. Any additional entries are ignored. The locale string should be properly formatted as defined in class ContentHandler.

If the number of action names does not match the number of actions, then the installation MUST fail. Action names may contain embedded whitespace.

The application management software maintains the state of the MIDlet and invokes methods on the MIDlet to change states. The MIDlet implements these methods to update its internal activities and resource usage as directed by the application management software. The MIDlet can initiate some state changes itself and notifies the application management software of those state changes by invoking the appropriate methods.

Note: The methods on this interface signal state changes. The state change is not considered complete until the state change method has returned. It is intended that these methods return quickly. Method Summary int checkPermission String permission Get the status of the specified permission.

String getAppProperty String key Provides a MIDlet with a mechanism to retrieve named properties from the application management software. Methods inherited from class java. In the Active state the MIDlet may hold resources. The method will only be called when the MIDlet is in the Paused state.

Two kinds of failures can prevent the service from starting, transient and non-transient. For non-transient failures the notifyDestroyed method should be called.

Its destroyApp will be called allowing the MIDlet to cleanup. In the Paused state the MIDlet must release shared resources and become quiescent. This method will only be called called when the MIDlet is in the Active state.

In the destroyed state the MIDlet must release all resources and save any persistent state. This method may be called from the Paused or Active states. MIDlet s should perform any operations required before being terminated, such as releasing resources or saving preferences or state.

This is only a valid response if the unconditional flag is set to false. For example:. One possible way to send an HTTP request:. POST ;. One possible way to receive an HTTP response:. Leveraging XML for data exchange allows for easy integration with existing systems.

All these parsers are becoming more complete over time with features such as DTD validation and Java interfaces for both tree and event-based parsing; of course all these goodies come at a price: memory footprint.

From the licensing perspective, the NanoXML licensing is the less restrictive one. Please refer to the individual web-sites for more information. The following is a snippet of code that uses the NanoXML:. Local data persistence. The MIDP defines javax. RMS records are stored as array of bytes. Developers can use java. The following is a snippet of code that opens a record store and reads three fields:.

ByteArrayInputStream recordStore. The RMS also provides the means to list, delete, enumerate, and filter sort records and to keep track get notified of changes to the record store.

Deploying a MIDlet. Knowing the characteristics of the JAR file before download is important because the JAR might be to big to fit on the device or you do not want to download huge JAR files over the air OTA or there might be some security concerns. Lets look at an example of a JAD file:. GatewayPort: GatewayURL: www. MIDlet Email,, com.

MIDlet-Jar-Size: