J2ME Text Editor

[Arthur Buliva]

Hi friends,

Let me start by putting my requirements in general view then I will be more specific

I need to create a J2ME text editor. It doesnt necessarily have to have the bold-italics-underline functions. Just a simple text editor that can read and write ASCII text files.

This is how I intend it to work:

The files are stored somewhere on an online server. The application starts by asking for your name. It then hooks up to a MySQL database that has a record of files that are associated with your name. It then uses a jsp app on the server to return the names of the files as a list.

Now, after the list of files has been populated, I need them to be links. Links that, when the user selects, gets the file contents from the server and opens it in an SMS composer text area. There is need to have two buttons, SAVE and DISCARD that do exactly what their names suggest. On selecting the button SAVE, the contents of the sms composer text area are rendered to the file.

So far, I have managed to be able to get the name inputted then get the list of files displayed. From there I need some help please. The following is my code:

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.io.*;
import java.io.*;
import java.lang.*;
import java.util.*;
 
//A first MIDlet with simple text and a few commands.
public class Connect extends MIDlet implements CommandListener
{
    
    //The exit commands
    private Command exitCommand;
    private Command connectCommand;
    private Command startCommand;
    
    
    //The display for this MIDlet
    private Display display;
    
    Form displayForm;
    private TextBox textBox;
    
    public Connect()
    {
        display = Display.getDisplay(this);
        exitCommand = new Command("Exit", Command.SCREEN, 0);
        connectCommand = new Command("OK", Command.OK, 1);
        startCommand = new Command("Connect", Command.OK, 1);
    }
    
    // Start the MIDlet by creating the Form and
    // associating the exit command and listener.
    public void startApp()
    {
        textBox = new TextBox("Please enter your username", "Name: ", 256, 0);
        textBox.addCommand(connectCommand);
        textBox.setCommandListener(this);
        display.setCurrent(textBox);
        
        
        
        displayForm = new Form("Connect to kasahorow");
        displayForm.addCommand(exitCommand);
        displayForm.setCommandListener(this);
        displayForm.addCommand(startCommand);
        displayForm.append(showResults(textBox.getString().substring(textBox.getString().indexOf("Name:") +5).trim()));
    }
    
    
    
    // Pause is a no-op because there is no   background
    // activities or record stores to be closed.
    public void pauseApp()
    { }
    
    // Destroy must cleanup everything not handled
    // by the garbage collector.
    // In this case there is nothing to cleanup.
    public void destroyApp(boolean unconditional)
    { }
    
    // Respond to commands. Here we are only  implementing
    // the exit command. In the exit command,  cleanup and
    // notify that the MIDlet has been destroyed.
    public void commandAction(Command c, Displayable s)
    {
        if (c == exitCommand)
        {
            destroyApp(false);
            notifyDestroyed();
        }
        else if(c == connectCommand)
        {
            displayForm.append("Welcome, " + textBox.getString().substring(textBox.getString().indexOf("Name:") +5).trim());
            display.setCurrent(displayForm);
        }
        else if(c == startCommand)
        {
            displayForm.append(showResults(textBox.getString().substring(textBox.getString().indexOf("Name:") +5).trim()));
            display.setCurrent(displayForm);
        }
    }
 
    String getViaHttpConnection(String url) throws IOException
    {
        HttpConnection c = null;
        InputStream is = null;
        StringBuffer str = new StringBuffer();
        
        try
        {
            c = (HttpConnection)Connector.open(url);
            // Get the ContentType
            String type = c.getType();
            
            // Getting the InputStream will open the connection
            // and read the HTTP headers. They are stored until
            // requested.
            is = c.openInputStream();
            
            // Get the length and process the data
            int len = (int)c.getLength();
            int ch;
            while ((ch = is.read()) != -1)
            {
                str.append((char)ch);
            }
        }
        finally
        {
            if (is != null)
                is.close();
            if (c != null)
                c.close();
        }
        return str.toString();
    }
    
    String showResults(String string)
    {
        String result = "";
        try
        {
            result = getViaHttpConnection("http://pm.suuch.com:8080/kasamobile/lister.jsp?user=" + string.trim());
        }
        catch (Exception exc)
        {
            exc.printStackTrace();
        }
        return result;
    }
}
 

The file lister.jsp is just a file that reads a MySQL database and returns the list of associated files as apropriate:

<%@ page contentType="text/html; charset=Windows-1252" language="java" import="java.sql.*" errorPage="" %>
 
<%
        try
        {
                Class.forName("com.mysql.jdbc.Driver").newInstance();
                Connection connection = DriverManager.getConnection("jdbc:mysql://localhost/" + database + "?", user, password); // Disguised for obvious reasons
                Statement statement = connection.createStatement();
                String query = "select fileAssociated as file from kasahorow_project_manager where assignedTo='" + request.getParameter("user") + "'";
                ResultSet rst = statement.executeQuery(query);
                while(rst.next())
                {
                        out.print(rst.getString("file") + "\n");
                }
        }
        catch(Exception e)
        {
        %><font color="red"><%out.print(e);%></font><%
        }
%>
 

Anyone to my rescue? Thanks in advance

[Kigyurt Kirk]

you could use jxcalc's editor for this kind of stuff
but i'm currently rewriting it - and i'm looking for if someone already created a full-feature advanced latex capable editor
http://jxcalc.sf.net