Blackberry - Setting LabelField background color

Question

I want to place several LabelFields with right-aligned text on a MainScreen with an alice blue background. Unfortunately I can\'t seem to figure out how to make that happen

Answer 1

Use

new LabelField("",LabelField.USE_ALL_WIDTH | DrawStyle.RIGHT);

without overriding the paint method of the LabelField.

Answer 2

In versions <= 4.5 you can create VerticalFieldManager with overrided paint():

class BGManager extends VerticalFieldManager {
    public BGManager() {
        super(USE_ALL_HEIGHT|USE_ALL_WIDTH);
    }
    public void paint(Graphics graphics)
    {
        graphics.setBackgroundColor(Color.DARKRED);
        graphics.clear();
        super.paint(graphics);
    }
}

Then use it on youre screen adding simple LabelField to it:

class Scr extends MainScreen {
    BGManager manager = new BGManager();
    public Scr() {
        super();
        add(manager);       
        manager.add(new LabelField("Hello!", FIELD_RIGHT));
        manager.add(new LabelField("This is a test", FIELD_RIGHT));
    }
}

In versions >= 4.6 you can use setBackgroud() method for default screen manager:

class Scr extends MainScreen {  
    public Scr() {
        super();
        VerticalFieldManager manager = 
            (VerticalFieldManager)getMainManager();
        manager.setBackground(
            BackgroundFactory.createSolidBackground(
                Color.DARKRED));        
        manager.add(new LabelField("Hello!", FIELD_RIGHT));
        manager.add(new LabelField("This is a test", FIELD_RIGHT));
    }
}

See BB KB DB-00131 - How to - Change the background color of a screen