WMA API and SMS API with exception

[natrixnt]

I have develop a
midlet for send a sms. I use the wma api and when i
start the app on the phone, i get a exception:

cannot create class in system package

when i use the SMS api with the address:

com.nokia.sms:// and number

i get a nullpointerexception.
here my code:


import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

import javax.microedition.io.Connector;
import javax.wireless.messaging.*;

public class WmaSend extends MIDlet implements
CommandListener
{
Display display;
Form mainForm;
MessageConnection conn;
TextMessage tmsg;

Command sendCmd = new Command("Send",
Command.SCREEN, 1);

Command exitCmd = new Command("Exit",
Command.EXIT, 1);

TextField address = new TextField("Address: ",
"NUMBER", 200, TextField.ANY);

ChoiceGroup typeSelect = new
ChoiceGroup("Messagetyp: ", Choice.EXCLUSIVE, new
String[] {"Text","Binary"}, null);

TextField port = new TextField("Port:", "", 5,
TextField.ANY);

TextField text = new TextField("Text:", "This is a
example SMS.", 160, TextField.ANY);

public WmaSend()
{
display = Display.getDisplay(this);
mainForm = new Form("WmaSend");
mainForm.append(address);
mainForm.append(port);
mainForm.append(typeSelect);
mainForm.append(text);
mainForm.addCommand(sendCmd);
mainForm.addCommand(exitCmd);
mainForm.setCommandListener(this);
}
public void commandAction(Command c, Displayable
d)
{
if(c == sendCmd)
{
try
{
String addr = "sms://" + address.getString() +
((port.getString().length() == 0) ? "" : ":" +
port.getString());

try {
conn =
(MessageConnection)Connector.open(addr);

}
catch (Exception ioe)
{
ioe.printStackTrace();


Alert alert = new Alert("IOError !");
alert.setString("SMS not send. IOError: " +
ioe.toString());
display.setCurrent(alert, mainForm);

}


if(typeSelect.getString(typeSelect.getSelectedIndex()).equals("Text"))
{

tmsg =

(TextMessage)conn.newMessage(MessageConnection.TEXT_MESSAGE);
try {
tmsg.setPayloadText(text.getString());
tmsg =

(TextMessage)conn.newMessage(MessageConnection.TEXT_MESSAGE);
}
catch (Exception e2)
{
Alert alert = new Alert("SendErroe !");
alert.setString("Sms not send. CreateError: " +
e2.toString()+ " "+conn.toString());
display.setCurrent(alert, mainForm);
}


try {
conn.send(tmsg);
conn.close();
}
catch (Exception e1)
{
Alert alert = new Alert("SendErroe !");
alert.setString("Sms not send. SendError: " +
e1.toString());
display.setCurrent(alert, mainForm);
}


}
else

if(typeSelect.getString(typeSelect.getSelectedIndex()).equals("Binary"))
{
BinaryMessage bmsg =

(BinaryMessage)conn.newMessage(MessageConnection.BINARY_MESSAGE);


bmsg.setPayloadData(text.getString().getBytes());

conn.send(bmsg);

conn.close();
}
Alert alert = new Alert("Suuccessful.");



alert.setString((typeSelect.getString(typeSelect.getSelectedIndex()).equals("Binary")
? "Binary" : "Text") + "-SMS sent to " + addr);

display.setCurrent(alert, mainForm);


}
catch (Exception e)
{
e.printStackTrace();

Alert alert = new Alert("Error !");
alert.setString("SMS hallo not send. Error: " +
e.toString());
display.setCurrent(alert, mainForm);
}
address.setString("");
port.setString("");
text.setString("");
}
else
{
notifyDestroyed();
}
}

public void startApp()
{
display.setCurrent(mainForm);
}

public void pauseApp()
{

}

public void destroyApp(boolean unconditional)
{

}

}

where is the mistake?

thanks for halp

best regards

natrix

[shmoove]

What phone are you using. Sounds like it doesn't have WMA or SMS API. These are optional packages and are not included on every phone.

shmoove

[natrixnt]

the phone is the 7250i and i know on the phone works wma api and sms api

[doctordwarf]

natrixnt

Try using correct protocol name.

1.2 Comparison of WMA and the Nokia SMS API

The Nokia SMS API pre-dates the public release of the Wireless Messaging API, but is functionally very similar. ...
You should use WMA in your MIDlets in devices where it is available. The differences between the two APIs are summarized in the table below.

Wireless Messaging API Package name: javax.wireless.messagingcom.nokia.mid.messaging

SMS URL: "sms://"+<address_part>"

Nokia SMS API Package name: com.nokia.mid.messaging

SMS URL: "com.nokia.sms://"+<address_part>

Taken from "A MIDlet Example Using the WMA and the Nokia SMS API v1.0"