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Revision as of 07:45, 7 December 2011 by hamishwillee (Talk | contribs)

Como listar arquivos da pasta raiz em Java ME

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Artigo
Tradução:
Por maiconherverton
Última alteração feita por hamishwillee em 07 Dec 2011

Original: How to list root file systems in Java ME (Inglês)

Resumo

Como listar arquivos da pasta raiz em Java ME. A API FileConnection(JSR-75) e seu método FileSystemRegistry.listRoots() existem para este fim.

O código para teste do MIDlet:

Código fonte: RootMIDlet.java

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.util.Enumeration;
import javax.microedition.io.file.*;
 
public class RootMIDlet extends MIDlet implements CommandListener {
private Form form;
private Command exitCommand;
 
public void startApp() {
form = new Form("Root list");
exitCommand = new Command("Exit", Command.EXIT, 1);
form.addCommand(exitCommand);
form.setCommandListener(this);
Display.getDisplay(this).setCurrent(form);
createRootList();
}
 
public void pauseApp() {
}
 
public void destroyApp(boolean unconditional) {
}
 
protected void createRootList() {
form.append("Roots:\n");
Enumeration drives = FileSystemRegistry.listRoots();
while (drives.hasMoreElements()) {
String driveString = drives.nextElement().toString();
form.append(driveString + "\n");
}
}
 
public void commandAction(Command c, Displayable d) {
if (c == exitCommand) this.notifyDestroyed();
}
}

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