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Revision as of 08:57, 18 September 2012 by hamishwillee (Talk | contribs)

How to check if a specific API is supported in Java ME

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Article Metadata
Code ExampleTested with
Devices(s): Nokia N95 8GB, Nokia 701, Nokia Asha 305
CompatibilityArticle
Keywords: java.lang.System, javax.microedition.lcdui.Alert, javax.microedition.lcdui.AlertType, java.lang.System.getProperty()
Created: tapla (09 May 2008)
Last edited: hamishwillee (18 Sep 2012)

Contents

Overview

This code snippet demonstrates how to check whether a specific Java ME API is supported on the device and also what version is supported. In this snippet, the API to be checked is the Wireless Messaging API.

Note.pngNote: The method System.getProperty() can also be used for obtaining several other properties than API versions. See Getting System properties in MIDP for a list of possibilities.

Source

import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Display;
String wmVersion = System.getProperty("wireless.messaging.version");
if (wmVersion != null) {
// Wireless messaging is supported. Inform the user.
Alert alert = new Alert("Supported",
"Wireless messaging is supported. Version is: " + wmVersion,
null, AlertType.INFO);
Display.getDisplay(this).setCurrent(alert);
} else {
// Wireless messaging is not supported. Inform the user.
Alert alert = new Alert("Not supported",
"Wireless messaging is not supported.", null,
AlertType.INFO);
Display.getDisplay(this).setCurrent(alert);
}

Postconditions

The MIDlet displays an alert which shows whether the Wireless Messaging API is supported and if it is, which version is supported.

See also

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