Buenas noches a todos les cuento que estoy desarrollando aplicaciones para mi celular .. son basicas ya que apenas estoy empezando .. aqui les dejo una aplicacion que hize; es un convertidor de Grados Faharenheit a Celsius .. les dejo las caps
Codigo
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package hello;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
/**
* @author Only
*/
public class HelloMIDlet extends MIDlet implements CommandListener {
private boolean midletPaused = false;
//<editor-fold defaultstate="collapsed" desc=" Generated Fields ">
private Command exitCommand;
private Command okCommand;
private Form form;
private StringItem stringItem;
private TextField textField;
//</editor-fold>
/**
* The HelloMIDlet constructor.
*/
public HelloMIDlet() {
}
//<editor-fold defaultstate="collapsed" desc=" Generated Methods ">
//</editor-fold>
//<editor-fold defaultstate="collapsed" desc=" Generated Method: initialize ">
/**
* Initializes the application.
* It is called only once when the MIDlet is started. The method is called before the <code>startMIDlet</code> method.
*/
private void initialize () {
// write pre-initialize user code here
// write post-initialize user code here
}
//</editor-fold>
//<editor-fold defaultstate="collapsed" desc=" Generated Method: startMIDlet ">
/**
* Performs an action assigned to the Mobile Device - MIDlet Started point.
*/
public void startMIDlet () {
// write pre-action user code here
switchDisplayable (null, getForm ());
// write post-action user code here
}
//</editor-fold>
//<editor-fold defaultstate="collapsed" desc=" Generated Method: resumeMIDlet ">
/**
* Performs an action assigned to the Mobile Device - MIDlet Resumed point.
*/
public void resumeMIDlet () {
// write pre-action user code here
// write post-action user code here
}
//</editor-fold>
//<editor-fold defaultstate="collapsed" desc=" Generated Method: switchDisplayable ">
/**
* Switches a current displayable in a display. The <code>display</code> instance is taken from <code>getDisplay</code> method. This method is used by all actions in the design for switching displayable.
* @param alert the Alert which is temporarily set to the display; if <code>null</code>, then <code>nextDisplayable</code> is set immediately
* @param nextDisplayable the Displayable to be set
*/
public void switchDisplayable (Alert alert, Displayable nextDisplayable) {
// write pre-switch user code here
Display display = getDisplay ();
if (alert == null) {
display.setCurrent (nextDisplayable);
} else {
display.setCurrent (alert, nextDisplayable);
}
// write post-switch user code here
}
//</editor-fold>
//<editor-fold defaultstate="collapsed" desc=" Generated Method: commandAction for Displayables ">
/**
* Called by a system to indicated that a command has been invoked on a particular displayable.
* @param command the Command that was invoked
* @param displayable the Displayable where the command was invoked
*/
public void commandAction (Command command, Displayable displayable) {
// write pre-action user code here
if (displayable == form) {
if (command == exitCommand) {
// write pre-action user code here
exitMIDlet ();
// write post-action user code here
} else if (command == okCommand) {
String fahrenheit;
float grad_cel,grad_farh;
float a = 1.8F;
fahrenheit = textField.getString();
grad_farh = Float.parseFloat(fahrenheit);
grad_cel = (grad_farh-32);
stringItem.setText(grad_farh + " Grados Fahrenheit = " + grad_cel + " Grados Celsius ");
// write post-action user code here
}
}
// write post-action user code here
}
//</editor-fold>
//<editor-fold defaultstate="collapsed" desc=" Generated Getter: exitCommand ">
/**
* Returns an initiliazed instance of exitCommand component.
* @return the initialized component instance
*/
public Command getExitCommand () {
if (exitCommand == null) {
// write pre-init user code here
exitCommand = new Command ("Exit", Command.EXIT, 0);
// write post-init user code here
}
return exitCommand;
}
//</editor-fold>
//<editor-fold defaultstate="collapsed" desc=" Generated Getter: form ">
/**
* Returns an initiliazed instance of form component.
* @return the initialized component instance
*/
public Form getForm () {
if (form == null) {
// write pre-init user code here
form = new Form ("Convertidor @Only", new Item[] { getTextField (), getStringItem () });
form.addCommand (getExitCommand ());
form.addCommand (getOkCommand ());
form.setCommandListener (this);
// write post-init user code here
}
return form;
}
//</editor-fold>
//<editor-fold defaultstate="collapsed" desc=" Generated Getter: okCommand ">
/**
* Returns an initiliazed instance of okCommand component.
* @return the initialized component instance
*/
public Command getOkCommand () {
if (okCommand == null) {
// write pre-init user code here
okCommand = new Command ("Convertir", Command.OK, 0);
// write post-init user code here
}
return okCommand;
}
//</editor-fold>
//<editor-fold defaultstate="collapsed" desc=" Generated Getter: textField ">
/**
* Returns an initiliazed instance of textField component.
* @return the initialized component instance
*/
public TextField getTextField () {
if (textField == null) {
// write pre-init user code here
textField = new TextField ("Ingrese el valor de los grados Fahrenheit", null, 32, TextField.ANY);
// write post-init user code here
}
return textField;
}
//</editor-fold>
//<editor-fold defaultstate="collapsed" desc=" Generated Getter: stringItem ">
/**
* Returns an initiliazed instance of stringItem component.
* @return the initialized component instance
*/
public StringItem getStringItem () {
if (stringItem == null) {
// write pre-init user code here
stringItem = new StringItem ("", null);
// write post-init user code here
}
return stringItem;
}
//</editor-fold>
/**
* Returns a display instance.
* @return the display instance.
*/
public Display getDisplay() {
return Display.getDisplay(this);
}
/**
* Exits MIDlet.
*/
public void exitMIDlet() {
switchDisplayable(null, null);
destroyApp(true);
notifyDestroyed();
}
/**
* Called when MIDlet is started.
* Checks whether the MIDlet have been already started and initialize/starts or resumes the MIDlet.
*/
public void startApp() {
if (midletPaused) {
resumeMIDlet();
} else {
initialize();
startMIDlet();
}
midletPaused = false;
}
/**
* Called when MIDlet is paused.
*/
public void pauseApp() {
midletPaused = true;
}
/**
* Called to signal the MIDlet to terminate.
* @param unconditional if true, then the MIDlet has to be unconditionally terminated and all resources has to be released.
*/
public void destroyApp(boolean unconditional) {
}
}
Gracias creo que a muchos les servira.
saludos.