I am having trouble getting the command listener to listen to my submenu converTemperatureSub(); I have no clue what I am doing wrong as it is the exact same thing as the main menu.. any help is greatly appreciated. Is there a better way to make a submenu then what I am doing?
Code:
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.rms.*;
import java.io.*;
import java.util.Date;
public class UnitConverter extends MIDlet implements CommandListener,
Runnable {
private Display display = null;
//menu strings
private static String TemperatureConverter = "Convert Temperature";
private static String PressureConverter = "Convert Pressure";
private static String EnergyConverter = "Convert Energy";
private static String SpeedConverter = "Convert Speed";
private static String DistanceConverter = "Convert Distance";
//submenu strings
private static String TempCF = "C to F";
private static String TempFC = "F to C";
//Declaring the menu
List menu = null;
Form ui_form = null;
List menuTemp = null;
//Welcome message
Alert welcome;
Command Done;
//Declaring Commands
Command Convert;
Command Quit;
Command Back;
String str, res;
double numUnits;
StringItem si = null;
RecordStore recordStore = null;
// declaring the alert
Alert timeAlert;
// declaring variable ticker
Ticker ui_ticker = null;
Image i = null;
public UnitConverter()
{
display = Display.getDisplay(this);
Done = new Command("Done", Command.SCREEN, 1);
Quit = new Command("Quit", Command.SCREEN, 2);
Convert = new Command("Convert", Command.ITEM, 1);
Back = new Command("Back", Command.ITEM, 2);
}
public void startApp()
{
Display.getDisplay(this).setCurrent(timeAlert);
createAlert();
menu = new List("Term Project - Converter Application", List.IMPLICIT);
Image temperature=null;
Image pression=null;
Image energy=null;
Image speed=null;
try {
temperature = Image.createImage("thermometer.png");
pression = Image.createImage("pressure.png");
energy = Image.createImage("energy.png");
speed = Image.createImage("speed.png");
} catch (IOException ioe){}
menu.append(TemperatureConverter, temperature );
menu.append(PressureConverter, pression);
menu.append(EnergyConverter, energy);
menu.append(SpeedConverter, speed);
menu.append(DistanceConverter, null);
// initializing and putting a message in the ui_ticker
ui_ticker = new Ticker("Welcome to the Converter application 2010");
// putting the ticker in the menu
menu.setTicker(ui_ticker);
menu.addCommand(Quit);
menu.setCommandListener(this);
display.setCurrent(timeAlert, menu);
}//End startApp()
public void createAlert() {
try {
i = Image.createImage("/ampere-meter.jpg");
} catch (IOException ioe) {
}
// Initializing the alert
timeAlert = new Alert("Welcome to the Converter application 2010", null, i, AlertType.INFO);
// setting a string into the alert to display the current date and time
timeAlert.setString(new Date().toString());
// placing a done command to close the alert
timeAlert.setTimeout(timeAlert.FOREVER);
}
public void pauseApp()
{
}//End pauseApp()
public void destroyApp(boolean unconditional)
{
notifyDestroyed();
}//End destroyApp()
public void commandAction(Command c, Displayable d)
{
if ( c == Done )
showMenu();
if ( c == Quit )
destroyApp(true);
if (c == Convert)
conversion();
else if(c == Back)
display.setCurrent(menu);
else if (c == List.SELECT_COMMAND)
run();
}//End commandAction
public void run()
{
int index = menu.getSelectedIndex();
if(index == -1) return;
String command = menu.getString(index);
if (command.equals(TemperatureConverter))
{
customForm("Convert Temperature");
convertTemperatureSub();
}
else if (command.equals(TempCF))
{
customForm("Convert Temperature");
convertTemperatureCF();
}
else if (command.equals(TempFC))
{
customForm("Convert Pressure");
convertPressure();
}
else if (command.equals(PressureConverter))
{
customForm("Convert Pressure");
convertPressure();
}
else if (command.equals(EnergyConverter))
{
customForm("Convert Energy");
convertEnergy();
}
else if (command.equals(SpeedConverter))
{
customForm("Convert Speed");
convertSpeed();
}
else if (command.equals(DistanceConverter))
{
customForm("Convert Distance");
convertDistance();
}
}
public void welcome()
{
display = Display.getDisplay(this);
welcome = new Alert("Unit Conversion", "", null, AlertType.INFO);
welcome.setString("Let's convert some units");
welcome.setTimeout(Alert.FOREVER);
welcome.addCommand(Done);
welcome.setCommandListener(this);
display.setCurrent(welcome);
}//END welcome()
public void showMenu()
{
menu = new List("Converter", List.IMPLICIT);
Image temperature=null;
Image pression=null;
Image energy=null;
Image speed=null;
try {
temperature = Image.createImage("thermometer.png");
pression = Image.createImage("pressure.png");
energy = Image.createImage("energy.png");
speed = Image.createImage("speed.png");
} catch (IOException ioe){}
menu.append(TemperatureConverter, temperature);
menu.append(SpeedConverter, pression);
menu.append(PressureConverter, energy);
menu.append(EnergyConverter, speed);
menu.append(DistanceConverter, null);
// initializing and putting a message in the ui_ticker
ui_ticker = new Ticker("Welcome to the Converter application 2010");
// putting the ticker in the menu
menu.setTicker(ui_ticker);
menu.addCommand(Quit);
menu.setCommandListener(this);
display.setCurrent(menu);
}//END showMenu();
public void customForm (String fName)
{
ui_form = new Form(fName);
ui_form.addCommand(Convert);
ui_form.addCommand(Back);
ui_form.setCommandListener(this);
display.setCurrent(ui_form);
}
public void convertPressure()
{
}
public void convertSpeed()
{
}
public void convertTemperatureSub()
{
menuTemp = new List("Converter", List.IMPLICIT);
Image temperature=null;
Image pression=null;
try {
temperature = Image.createImage("thermometer.png");
pression = Image.createImage("pressure.png");
} catch (IOException ioe){}
menuTemp.append(TempCF, temperature);
menuTemp.append(TempFC, pression);
menuTemp.addCommand(Back);
menuTemp.setCommandListener(this);
display.setCurrent(menuTemp);
}
public void convertTemperatureCF()
{
double result;
TextField num = new TextField("Enter the number of units you would like to convert", "", 50, TextField.ANY);
ui_form.append(num);
str = num.getString();
try
{
numUnits = Double.parseDouble(str);
}
catch (NumberFormatException nfe)
{
}
//double fromNum = Double.parseDouble(str);
TemperatureConverter c = new TemperatureConverter("Celsius", "Fahrenheit", "This is a temp converter",
"Temperature converter", "Temp");
result = c.convertCF(numUnits);
res = "" + result;
}//End convertTemp()
public void convertDistance()
{
double result;
TextField num = new TextField("Enter the number of units you would like to convert", "", 50, TextField.ANY);
ui_form.append(num);
str = num.getString();
try
{
numUnits = Double.parseDouble(str);
}
catch (NumberFormatException nfe)
{
}
//double fromNum = Double.parseDouble(str);
DistanceConverter d = new DistanceConverter("Kilometers", "Milest", "This is a dist converter",
"Distance converter", "Dist");
result = d.convertKM(numUnits);
res = "" + result;
}
public void convertEnergy()
{
}
public void conversion()
{
ui_form.append(res);
//ui_form.append(str);
}
}
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J2ME submenu not listening to command listener
