|
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.midlet.MIDlet;
import javax.microedition.rms.RecordEnumeration;
import javax.microedition.rms.RecordStore;
public class J2MERecordStoreExample extends MIDlet implements CommandListener {
private Display display;
private Alert alert;
private Form form = new Form("Record Store");
private Command exit = new Command("Exit", Command.SCREEN, 1);
private Command start = new Command("Start", Command.SCREEN, 1);
private RecordStore recordstore = null;
private RecordEnumeration recordenumeration = null;
public J2MERecordStoreExample() {
display = Display.getDisplay(this);
form.addCommand(exit);
form.addCommand(start);
form.setCommandListener(this);
}
public void startApp() {
display.setCurrent(form);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
}
public void commandAction(Command command, Displayable displayable) {
if (command == exit) {
destroyApp(true);
notifyDestroyed();
} else if (command == start) {
try {
recordstore = RecordStore.openRecordStore("myRecordStore", true);
} catch (Exception error) {
alert = new Alert("Error Creating", error.toString(), null, AlertType.WARNING);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert);
}
try {
recordstore.closeRecordStore();
} catch (Exception error) {
alert = new Alert("Error Closing", error.toString(), null, AlertType.WARNING);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert);
}
if (RecordStore.listRecordStores() != null) {
try {
RecordStore.deleteRecordStore("myRecordStore");
} catch (Exception error) {
alert = new Alert("Error Removing", error.toString(), null, AlertType.WARNING);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert);
}
}
}
}
}
|
