Blackberry JAVA DEVELOPMENT ENVIRONMENT Посібник для початківців - Сторінка 20

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Getting started guide

CityInfoScreen

In the

protected void makeMenu(Menu menu,int instance)

{ menu.add(_viewItem);

menu.add(_closeItem);

}

Create a screen that displays information about a city

Within the

CityInfoScreen

private class InfoScreen extends MainScreen

{

2. In the first line of the constructor for the inner class, invoke the constructor of the

super();

3. To display a label with the name of the city the BlackBerry® smartphone user selects, in the constructor for

the inner class, create a

LabelField lf = new LabelField();

4. To display the population of the city the BlackBerry smartphone user selects, in the constructor for the inner

class, create a

BasicEditField

BasicEditField popField = new BasicEditField("Population: ", null, 20, Field.READONLY);

5. To display the state that the city the BlackBerry smartphone user selects is located in, in the constructor for

the inner class, create a

BasicEditField stateField = new BasicEditField("State: ", null, 20, Field.READONLY);

6. To display tourist attraction information for the city the BlackBerry smartphone user selects, in the

constructor for the inner class, create a

BasicEditField sightsField = new BasicEditField("Sights: ", null, 50, Field.READONLY);

To add fields to the

Manager.add()

invoke

add(lf);

add(new SeparatorField());

add(popField);

add(stateField);

add(sightsField);

BasicEditField

Reference for more information.

makeMenu()

class, override the

class, create an inner class that extends

LabelField

. A

BasicEditField

Manager

object for the

CityInfoScreen

is an editable simple text field with no formatting. See

method.

MainScreen

is an editable simple text field with no formatting.

class, in the constructor for the inner class,

BasicEditField

MainScreen

class.

in the API