[hibbert]

Hi,
i have developed an Library Project, which was shown in the Settingslist, where you can find date and time settings etc.

Now i want to save one of my classes persistenable, thats no problem, it was saved without any problems. But after restarting my BlackBerry my program is not shown in the optionslist any more.

If i take a look at the installed programs the BlackBerry says, that my programm is installed, but it's not shown.

I habe deleted it, with the Desktopmanager, directly from the BB and installed it again, restarted and reseted the bb, renamed my project, make a newer version, recompiled it, make a new Library project, but nothing is shown there.

has anybody an idea how i can fix this problem??

PHP Code:

package blablablubb;

import net.rim.blackberry.api.options.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.system.*;

class frmOptions implements OptionsProvider{
    private static frmOptions instance;
    
    public static void libMain(Stringxxx91;xxx93; args) {OptionsManager.registerOptionsProvider(getInstance());}
    private static frmOptions getInstance() {
        if(instance == null) {
            instance = new frmOptions();
        }
        return instance;
    }    
    private frmOptions() {}
    public String getTitle() {return "myOptions";}
    public void populateMainScreen(MainScreen mainScreen) {}
    public void save() {}
} 


thanks hibbert

[hibbert]

while my blackberry was starting i attached the debugger, and i get this error:
Error starting <projectname>: Class '<projectname>.clsOptions' multiply defined.

i used clsOptions in myOptions and in my application, which i can start from the blackberrys homescreen. but this applications isn started.

maybe the problem is, that clsOptions implements net.rim.device.api.util.Persistable ??
or that on the void populateMainScreen a static function of clsOptions is called to load the options into an instance of clsOptions...? looks like this here:

PHP Code:

class clsOptions implements net.rim.device.api.util.Persistable{
//...
public static clsOptions loadOptions() {
clsOptions data = null;
// load etc...
return data;
}
} // end of clsOptions

// my Library:
class frmOptions implements OptionsProvider {
    private static frmOptions instance;
    
    private clsOptions options;
//...
 public void populateMainScreen(MainScreen mainScreen) {
 options = clsOptions.loadOptions();// neu
 }
} 


maybe this could be a problem... nor not??

thanks hibbert

[simon.hain]

do not use persistant classes in a library project.
you can use a superclass in the library and implement persistable in your project in an extension.

[hibbert]

ermm what? ^^

can you give me an example of using a superclass? i can't follow you (at this time)

or is there a was to serialize the class to a string and save this string?


hibbert

[simon.hain]

let's keep it simple:
putting your own persistable classes into a library does not work (you will get the multiply defined error).
either use "native persistable" classes (Hashtable for example works very well to save options) or put the class into your main project instead of the library.

i encountered the very same problems some time ago and am now just using Hashtable instead of bean classes.