读取手机的通讯录
为什么下面的代码读去通讯录（已经存在），sun的wtk会提示问是否要读取通讯录？当我按下是的，而模拟器没有放映，
我用Nokia_S40_DP20_SDK_1_1把jad导入运行时，提示的却是cannotdefounderror为什么啊？？？
import gov.nist.siplite.header.ContactList;

import java.io.*;
import java.util.Enumeration;

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import javax.microedition.pim.Contact;
import javax.microedition.pim.PIM;
import javax.microedition.pim.PIMException;
import javax.microedition.pim.PIMList;

import org.kxml.io.AbstractXmlWriter;
import org.kxml.io.XmlWriter;

public class f extends MIDlet implements CommandListener
{

private Display display;
private Command exitCommand,okCommand;
// private TextBox textbox;
private Alert alert;
public String tagTable[] = {
"id ",
"firstname ",
"mun "
};
public f(){
display = Display.getDisplay( this );


alert=new Alert( "alert ", "Are you start xml form contact? ",null,AlertType.INFO);
exitCommand = new Command( "Exit ", Command.EXIT, 1 );
okCommand=new Command( "statxml ",Command.OK,1);

alert.addCommand(exitCommand);
alert.addCommand(okCommand);
alert.setCommandListener(this);
}
public void commandAction( Command c, Displayable d ){
if( c == exitCommand )
{
destroyApp( false);
notifyDestroyed();
}else if(c==okCommand)
{
try
{
testXML();
}catch( Exception e )
{
System.err.println( "Exception " + e );

}
}

}

protected void destroyApp( boolean unconditional )
{

}
protected void pauseApp()
{
}

protected void startApp()
{
display.setCurrent(alert);



}

private void log( String str )
{
System.out.println( str );
}



private void testXML() throws IOException
{
log( "starting testxml ");
StringBuffer sb=new StringBuffer();


try{
PIM pim = PIM.getInstance();
ContactList clist=null;
try {
log( "stary open ");

clist = (ContactList) pim.openPIMList(PIM.CONTACT_LIST,
PIM.READ_ONLY );
log( "end open ");
} catch(Exception e) {
sb.append( "{ "+e+ "} ");
}

log( "start congt ");
Contact contact = null;
Enumeration items = ((PIMList) clist).items();
while(items.hasMoreElements()) {

contact = (Contact)(items.nextElement());
int[] fields = contact.getFields();
for(int i = 0; i < fields.length; i++)
{

int fieldIndex = fields[i];
int dataType = ((PIMList) clist).getFieldDataType(fieldIndex);

sb.append( " Field " + fieldIndex + ": "+((PIMList) clist).getFieldLabel(fieldIndex)+ " - data type: " + dataType);
sb.append( "\n ");

for(int j = 0; j < contact.countValues(fieldIndex); j++)
{
int attr = contact.getAttributes(fieldIndex, j);
try
{
sb.append( "( "+((PIMList) clist).getAttributeLabel(attr) + "): ");
sb.append(contact.getString(fieldIndex, j));
sb.append( "\n ");
}catch(Exception e)
{
sb.append( ": "+e+ ": ");
sb.append( "\n ");
}
}
log(sb.toString());


}

}

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

}

}

/* log( "Writing uncompressed XML to a string... " );
ByteArrayOutputStream out = new ByteArrayOutputStream();
XmlWriter xw = new XmlWriter( new OutputStreamWriter( out ) );

AbstractXmlWriter writer=( AbstractXmlWriter )xw;
PIM pim = PIM.getInstance();
ContactList list = null;
try {
log( "starting ddc ");
list = (ContactList)pim.openPIMList(PIM.CONTACT_LIST,PIM.READ_ONLY);
log( "ending ddc ");
}catch(PIMException pe){
log( "ddc catch ");
pe.printStackTrace();
}catch(SecurityException se){
log( "ddc catch2 ");
se.printStackTrace();
}
try {
log( "starting enumeratong ");
Enumeration items = ((PIMList) list).items();
while(items.hasMoreElements()) {
Contact contact = (Contact)items.nextElement();
writer.startTag( "id ");
writer.startTag( "firstname " );
int field=contact.NAME ;
int index=contact.getPreferredIndex( field) ;
String temp=contact.getString(field, index);
writer.write( temp );

writer.endTag();
writer.startTag( "mun " );
int field2=contact.TEL;
int index2=contact.getPreferredIndex( field) ;
String temp2=contact.getString(field2, index2);
writer.write( temp2);
writer.endTag();
writer.endTag();
writer.close();
}
}catch(PIMException pe) {
pe.printStackTrace();
}catch(SecurityException se) {
se.printStackTrace();
}
String str = new String( out.toByteArray() );
log( "String length is " + str.length() );
log( "String value is " );
log( str );
log( "Writing compressed XML to a string... " );
out = new ByteArrayOutputStream();

*/


[解决办法]
重新起一个线程去做查询工作,而不要把他放到commandAction中
[解决办法]
拉把椅子上帮 "CHINADENG() "顶，

呵呵
[解决办法]
模拟器中默认是没有任何数据的，你先添加一些联系人的数据到里面再读取
或者你到%WTK_HOME%\appdb\Nokia_S40_DP20_SDK_1_1\pim\contacts\Contacts目录下看有没有数据，如果没有，查询时候就的null回来，如果有还是查询不出来，可能就是程序的问题了，或者是由于j2me的安全问题，限制了你去读取敏感数据