Java Development

[lastone]

Hi, How to detect if a device support built-in media storage or eMMC ??

[rcmaniac25]

Use javax.microedition.io.file.FileSystemRegistry.listRoots() and check to see if the desired storage medium is avaliable. Built-in will be "store" and eMMC (more commonly SD) is "SDCard".

[lastone]

eMMC is not SDCard. embedded multimedia card (eMMC). I need to determine what a device support SQLite (eMMC/SDCard) or not.

[gluth]

SQLLite is supported on devices with OS 5.0 or better. You don't have to check it via checking of availability of SDCard.

[lastone]

Yes, but not true. SQLite cannot work on device with OS5/OS6 without SDCard.

The default location for the database file is /SDCard/databases/<application_name>/

[CMY]

Rcmaniac25 is still correct. You can use the FileSystemRegistry.listRoots() or just check for file:///store/home/user/ directory.

[MarkyC]

There is actually an example right in the listRoots() api, but this is what you're looking for:

public boolean hasSD() {
	Enumeration e = FileSystemRegistry.listRoots();
	while (e.hasMoreElements()) {
		String root = (String) e.nextElement();
		if (root.equals("SDCard/"))
		{	// the user has an SD card installed (we didn't check for free space though)
			return true;
		}
	} 
	// we went through all the roots, and found no SD card, it's safe to assume there isn't one in the device
	return false;
}

[lastone]

I think u cannot create sqlite db in device like Gemini 8520 (OS 5) although Gemini has file:///store/home/user/ directory

[gluth]

You can attach any location for database with use of DatabaseFactory.create. You can put there internal storage URL as location, path defaults to sdcard, but you can override it with your own path.