Button for the new screen

Sorry guys but I looked everywhere to find a tutorial or something on it, but no luck. All that simply, I try to call another class when I click on a button. I don't know how the screen operation because things that it won't let me use the "highScore()" as a variable.  I created highScore as another class that is almost completely empty at the moment.

Here is my sample code, help please! Also if anyone knows a tutorial about a link would be GREATLY appreciated. Thanks again!

ButtonField highScoreBut = new ButtonField ("High Score", Field.FIELD_HCENTER) {}
protected boolean trackwheelClick (int status, int time) {}
           
UiApplication.getUiApplication () .pushScreen (new highScore());
Returns true;
}

Questionman salvation,

Here is the link to the developer's guide

http://supportforums.blackberry.com/t5/Java-Development/tkb-p/java_dev%40tkb?labels=tutorial. And I used "Apress.Beginning.BlackBerry.Development.Nov.2009.pdf", a very good book for a dish and the author is Anthony Rizk.

For your question,.

in fact for field button we will implement FieldChangeListener. And that the class must implement the FieldChangeListener class.

in constructor

ButtonField highScoreBut = new ButtonField ("High Score", Field.FIELD_HCENTER);

highScoreBut.setChangeListener (this);

Add (highScoreBut);

and now to implement this method in this class as below

' Public Sub fieldChanged (field field, int context) {}

If (instanceof ButtonField field) {}

if(Field == highScoreBut) {}

UiApplication.getUiApplication () .pushScreen (new highScore());

}

}

}

class highScore() should extend class form. If highScore() is just a class so no need to call UiApplication.getUiApplication () .pushScreen ();   Simply create and failure of this class and to call this method.

Thank you & best regards

Priyanka

Tags: BlackBerry Developers

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