當在黑莓中選擇其中一個ObjectChoiceField時切換到新屏幕

Question

任何人都可以告訴我如何在選擇ObjectChoiceField之一時切換到另一個屏幕。

謝謝。

Answer 1

final class HelloWorldScreen extends MainScreen implements FieldChangeListener 
{ 
     ObjectChoiceField choice=null; 
     public HelloWorldScreen() 
     { 
       super(); 
       String choicestrs[] = {"Opt 1", "Opt 2", "Opt 3"}; 
       choice = new ObjectChoiceField("Object Choice Field: ", choicestrs, 0); 
       choice.setChangeListener(this); 
      add(choice); 
    } 
    public void openAnotherForm(){ 
     AnotherForm newScreen = new AnotherForm(); 
     UiApplication.getUiApplication().pushScreen(newScreen); 
    } 
    public void fieldChanged(Field arg0, int arg1) { 
     openAnotherForm(); 

    } 
} 
class AnotherForm extends MainScreen 
{ 
public AnotherForm() 
{ 
     super(); 
     add(new LabelField("Another Form")); 
} 
}