Back Command not working in all page

[acema]

Hi All,

I'm new to Java Me Programming and hope some light could be shed.
My back command only works in my 'Write' page and not the 'read' and 'search' pages.
Please help me out.

My code is as followed :

import java.io.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.rms.*;

public class MovieBookingMidlet extends MIDlet implements CommandListener
{
    private RecordStore rs = null;					// Record store
    private Display display;						// Reference to Display object
    private List menu;								// List object reference
    private Form writeForm;							// Write records screen
    private Form readForm;							// Read records screen
    private Form deleteForm;						// Delete records screen
    private Form searchForm;						// Search records screen
    private TextField textName;						// Input name

   private ChoiceGroup Movie;
  // private DateField date;
    //private TextField textDate;					// Input phone
    //private TextField textCategory;
   // private TextField textStatus;
    private TextField textSearch;					// Input search
    private Command backCommand = new Command("Back", Command.BACK, 1);
    private Command deleteCommand = new Command("Delete", Command.EXIT, 1);
    private Command exitCommand = new Command("Exit", Command.EXIT, 1);
    private Command writeCommand = new Command("Write", Command.OK, 1);
    private Command findCommand = new Command("Find", Command.OK, 1);
    static final String REC_STORE = "db_lab10";		// Name of record store
    private TextField textPhone;
    private TextField textMovie;

    
    private String movieName;
    private ChoiceGroup timing;
    private String Timing;
    
    private ChoiceGroup date;
    private String mDate;

    private ChoiceGroup NoTic;
    private String noTic;
    public MovieBookingMidlet()
    {
        // create a list menu
        menu = new List("Movie  Booking", Choice.IMPLICIT);
        menu.append("Book", null);
        menu.append("View", null);
        menu.append("Delete", null);
        menu.append("Search", null);

         Movie = new ChoiceGroup("Select Movie", Choice.EXCLUSIVE);
                    Movie.append("Titanic", null);
                    Movie.append("X-Men",null);

        // add an exit command & register command listener for list menu
        menu.addCommand(exitCommand);
        menu.setCommandListener(this);
    }

    public void destroyApp(boolean unconditional)
    {
        // Close record store
        closeRecStore();

        // Remove the record store
        // deleteRecStore();

        menu = null;
        writeForm = null;
    }

    public void startApp()
    {
        // Create the record store
        openRecStore();

        // Read back the records
        // readStream();

        // get reference to Display object
        display = Display.getDisplay(this);

        // set list menu visible
        display.setCurrent(menu);
    }

    public void pauseApp()
    {
    }

    public void commandAction(Command c, Displayable d)
    {
        Alert alert;

        if (d == menu)
        {
            if (c == List.SELECT_COMMAND)
            {
                int selectedIndex = menu.getSelectedIndex();

                // debugging only
                // System.err.println(menu.getString(selectedIndex));

                if (menu.getString(selectedIndex).equals("Book"))
                {

                    // try to dispose of write form first
                    writeForm = null;

                    // create a form for write records screen
                    writeForm = new Form("Book Movies");

                    // create 2 TextFields for write records screen
                    textName = new TextField("Name:", "", 50, TextField.ANY);
                    textPhone = new TextField("Phone No:", "", 9, TextField.NUMERIC);

                    date = new ChoiceGroup("Select Available Date", Choice.POPUP);
                    date.append("23/1/11", null);
                    date.append("24/1/11",null);
                    date.append("25/1/11",null);
                    date.append("26/1/11",null);

                    timing = new ChoiceGroup("Select timing", Choice.POPUP);
                    timing.append("7pm", null);
                    timing.append("9pm",null);
                    timing.append("11pm",null);
                    timing.append("1am",null);

                    Movie = new ChoiceGroup("Select Movie", Choice.POPUP);
                    Movie.append("Titanic", null);
                    Movie.append("X-Men",null);
                    Movie.append("Transformer",null);
                    Movie.append("Harry Porter",null);

                    NoTic = new ChoiceGroup("No Of Tickets", Choice.POPUP);
                    NoTic.append("1", null);
                    NoTic.append("2", null);
                    NoTic.append("3", null);
                    NoTic.append("4", null);
                    NoTic.append("5", null);
                    NoTic.append("6", null);
                    NoTic.append("7", null);
                    NoTic.append("8", null);
                    NoTic.append("9", null);
                    NoTic.append("10", null);


                    writeForm.append(textName);
                    writeForm.append(textPhone);

                    writeForm.append(date);
                    writeForm.append(timing);
                    writeForm.append(Movie);
                    writeForm.append(NoTic);

                    // add a back command & register command listener for write records screen
                    writeForm.addCommand(backCommand);
                    writeForm.addCommand(writeCommand);
                    writeForm.setCommandListener(this);

                    // set write form visible
                    display.setCurrent(writeForm);
                }
                else if (menu.getString(selectedIndex).equals("View"))
                {
                    // try to dispose of read form first
                    readForm = null;

                    // create a form for read records screen
                    readForm = new Form("View Bookings");

                    // add a back command & register command listener for read records screen
                    readForm.addCommand(backCommand);
                    readForm.setCommandListener(this);

                    // print out the results to the screen
                    int count = readRecordStore(readForm);

                    if (count == 0)
                    {
                        alert = new Alert("Info", "No Bookings are found.", null, AlertType.INFO);
                        display.setCurrent(alert, menu);
                    }
                    else
                    {
                        // set read form visible
                        display.setCurrent(readForm);
                    }
                }
                else if (menu.getString(selectedIndex).equals("Delete"))
                {
                    // try to dispose of delete form first
                    deleteForm = null;

                    // create a form for delete records screen
                    deleteForm = new Form("Delete Records");

                    // create 2 TextFields for delete records screen
                    textName = new TextField("Name:", "", 50, TextField.ANY);
                    textPhone = new TextField("Phone:", "", 9, TextField.NUMERIC);
                    textMovie = new TextField("Movie","",50, TextField.ANY);


                    // append 2 TextFields for delete records screen
                    deleteForm.append(textName);
                    deleteForm.append(textPhone);
                    deleteForm.append(textMovie);


                    // add a back command & register command listener for delete records screen
                    deleteForm.addCommand(deleteCommand);
                    deleteForm.addCommand(backCommand);
                    deleteForm.setCommandListener(this);

                    // set delete form visible
                    display.setCurrent(deleteForm);
                }
              
    }

[prssupe]

IS your commandAction() handling the back command i cant see any such code ?? add the cases to make your backcommand work i.e for hadling the search forms back command add it as if (displayable=="search"){//code for backcommand}

[nyerunkar]

check have set command listener for every form, & if yes then check have you add on form.

check any action get perform or not on button...use simple System.out.println() for trace your code.

[raj_J2ME]

Are any other command working then Back?

Instead of checking if (d == menu), You should check like this if (d instanceof menu).

And you have not checked the condition for the Back command, please check and code. Add the condition for the back command.
check and revert.