import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
public class HttpCommMIDlet extends MIDlet
{
private UIController uicontroller;
protected void startApp() throws MIDletStateChangeException
{
uicontroller = new UIController(this);
uicontroller.init();
}
protected void pauseApp()
{
}
protected void destroyApp(boolean arg0) throws MIDletStateChangeException
{
}
}
import java.io.IOException;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
public class UIController
{
private HttpCommMIDlet midlet;
private InputCanvas inputUI;
private DisplayCanvas displayUI;
private Display display;
private HttpCommHandler httpHandler;
public UIController(HttpCommMIDlet midlet)
{
this.midlet = midlet;
}
public static class EventID
{
public static final int CONNECT_TO_SERVER = 0;
public static final int DISPLAY_BACK_TO_INPUT = 1;
}
public void init()
{
display = Display.getDisplay(midlet);
httpHandler = new HttpCommHandler(
"http://yourip:8088/http/myservlet");
inputUI = new InputCanvas(this);
displayUI = new DisplayCanvas(this);
display.setCurrent(inputUI);
}
public void setCurrent(Displayable disp)
{
display.setCurrent(disp);
}
public void handleEvent(int EventID, Object[] obj)
{
new EventHandler(EventID, obj).start();
}
private class EventHandler extends Thread
{
private int eventID;
private Object[] obj;
private Displayable backUI;
public EventHandler(int eventID, Object[] obj)
{
this.eventID = eventID;
this.obj = obj;
}
public void run()
{
synchronized (this)
{
run(eventID, obj);
}
}
private void run(int eventID, Object[] obj)
{
switch (eventID)
{
case EventID.CONNECT_TO_SERVER:
{
try
{
String result = httpHandler
.sendMessage((String) obj[0]);
displayUI.init(result);
setCurrent(displayUI);
break;
} catch (IOException e)
{
}
}
case EventID.DISPLAY_BACK_TO_INPUT:
{
setCurrent(inputUI);
break;
}
default:
break;
}
}
};
}
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.TextField;
public class InputCanvas extends Form implements CommandListener
{
private UIController uicontroller;
private TextField inputField;
private StringItem result;
public static final Command okCommand = new Command("OK", Command.OK, 1);
public InputCanvas(UIController uicontroller)
{
super("Http Comunication");
this.uicontroller = uicontroller;
inputField = new TextField("Input:", null, 20, TextField.ANY);
this.append(inputField);
this.addCommand(okCommand);
this.setCommandListener(this);
}
public void commandAction(Command arg0, Displayable arg1)
{
if (arg0 == okCommand)
{
String input = inputField.getString();
uicontroller.handleEvent(UIController.EventID.CONNECT_TO_SERVER,
new Object[] { input });
}
}
}
import java.io.*;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
public class HttpCommHandler
{
private String URL;
public HttpCommHandler(String URL)
{
this.URL = URL;
}
public String sendMessage(String message) throws IOException
{
HttpConnection httpConn;
DataInputStream input;
DataOutputStream output;
String result;
try
{
httpConn = open();
output = this.openDataOutputStream(httpConn);
output.writeUTF(message);
output.close();
input = this.openDataInputStream(httpConn);
result = input.readUTF();
closeConnection(httpConn,input,output);
return result;
}
finally
{
}
}
public HttpConnection open() throws IOException
{
try
{
HttpConnection connection = (HttpConnection) Connector.open(URL);
connection.setRequestProperty("User-Agent", System
.getProperty("microedition.profiles"));
connection.setRequestProperty("Content-Type",
"application/octet-stream");
connection.setRequestMethod(HttpConnection.POST);
return connection;
} catch (IOException ioe)
{
throw ioe;
}
}
private DataInputStream openDataInputStream(HttpConnection conn)
throws IOException
{
int code = conn.getResponseCode();
if (code == HttpConnection.HTTP_OK)
{
return conn.openDataInputStream();
} else
{
throw new IOException();
}
}
private DataOutputStream openDataOutputStream(HttpConnection conn)
throws IOException
{
return conn.openDataOutputStream();
}
private void closeConnection(HttpConnection conn, DataInputStream dis,
DataOutputStream dos)
{
if(conn!= null)
{
try
{
conn.close();
}
catch(IOException e)
{}
}
if(dis!=null)
{
try
{
dis.close();
}
catch(IOException e)
{}
}
if(dos!=null)
{
try
{
dos.close();
}
catch(IOException e)
{}
}
}
}
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
public class DisplayCanvas extends Form implements CommandListener
{
private UIController uicontroller;
private StringItem result;
private int index = 0;
private boolean first = true;
public static Command backCommand = new Command("Back", Command.BACK, 2);
public DisplayCanvas(UIController uicontroller)
{
super("Result");
this.uicontroller = uicontroller;
result = new StringItem("you have input:", null);
this.addCommand(backCommand);
this.setCommandListener(this);
}
public void init(String message)
{
if (first)
{
result.setText(message);
index = this.append(result);
first = false;
}
else
{
this.delete(index);
result.setText(message);
this.append(result);
}
}
public void commandAction(Command arg0, Displayable arg1)
{
uicontroller.handleEvent(UIController.EventID.DISPLAY_BACK_TO_INPUT,
null);
}
}
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