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forent
Joined: 09 Mar 2011
Posts: 3
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 Posted: Mon Mar 21, 2011 4:19 am Post subject: Form problem[help please] |
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i just want to make form looping, form is Form number one and hasilForm is second one. i want to switch from "form" to "hasilForm" and get back to "form"
| Code: | public class loctest extends MIDlet implements CommandListener{
//private Display display;
loctest parent;
static Form form = new Form("LBS v0.01");
static Form hasilForm = new Form("LBS v0.01 Peta");
private Command cmdExit,cmdOK,cmdBack;
private StringItem si;
static String host = "localhost";
static String port = "9995";
Client klien=null;
TextField textToFind,textToFind2;
public loctest() throws IOException{
parent = this;
}
public void startApp(){
Display.getDisplay(this);
cmdExit = new Command("Exit",Command.EXIT,5);
cmdOK = new Command("OK",Command.OK,1);
cmdBack = new Command("Back", Command.BACK, 2);
si = new StringItem("Find", "Click OK");
textToFind = new TextField("Find What : ","",20,TextField.ANY);
textToFind2 = new TextField("Find What : ","",20,TextField.ANY);
form.append(textToFind);
form.addCommand(cmdExit);
form.addCommand(cmdOK);
form.setCommandListener(this);
//hasilForm.append(textToFind2);
hasilForm.addCommand(cmdExit);
hasilForm.addCommand(cmdBack);
Display.getDisplay(this).setCurrent(form);
}
public void pauseApp(){
}
public void destroyApp(boolean flag) {
notifyDestroyed();
}
public void commandAction(Command c, Displayable d){
if (c.getLabel().equals("OK")){
// Retriever ret = new Retriever(this);
// GoogleMaps peta = new GoogleMaps("bla...bla..bla");
// try {
//
// form.append(peta.retrieveStaticImage(200, 200, -6.891577010773676, 107.61048316955566, 14, "png32"));
// System.out.println(ret.lat+" "+ret.lon);
// form.addCommand(cmdBack);
// } catch (IOException ex) {
// ex.printStackTrace();
// }
// ret.start();
// ret.setRequest(textToFind.getString());
// ret.socket_localhost();
Display.getDisplay(this).setCurrent(hasilForm);
}
if (c.getLabel().equals("Back")) {
Display.getDisplay(this).setCurrent(form);
}
if(c.getLabel().equals("Exit")){
destroyApp(false);
}
//c.getLabel().equals("OK")
}
public void displayString(String string){
si.setText(string);
}
} |
this is the result..
| Quote: | TRACE: <at java.lang.NullPointerException: 0>, Exception caught in Display class
java.lang.NullPointerException: 0
at javax.microedition.lcdui.Display$ChameleonTunnel.callScreenListener(), bci=46
at com.sun.midp.chameleon.layers.SoftButtonLayer.processCommand(), bci=74
at com.sun.midp.chameleon.layers.SoftButtonLayer.soft1(), bci=37
at com.sun.midp.chameleon.layers.SoftButtonLayer.keyInput(), bci=36
at com.sun.midp.chameleon.CWindow.keyInput(), bci=38
at javax.microedition.lcdui.Display$DisplayEventConsumerImpl.handleKeyEvent(), bci=17
at com.sun.midp.lcdui.DisplayEventListener.process(), bci=277
at com.sun.midp.events.EventQueue.run(), bci=179
at java.lang.Thread.run(Thread.java:662)
javacall_lifecycle_state_changed() lifecycle: event is JAVACALL_LIFECYCLE_MIDLET_SHUTDOWNstatus is JAVACALL_OK |
thanks anyway... |
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