Question

I need to create a seek bar in my blackberry app like in android. all i need to do with it is to just slide it to the right or left to increase and decrease. does seekbar exist in blackberry or is it called as a slider in blackberry?

Answer 1

Create a SliderScreen:

public class SliderScreen extends MainScreen implements FieldChangeListener
{
    private SliderField slider;
    private HorizontalFieldManager hm;

    public SliderField(){
        slider = new SliderField(
            Bitmap.getBitmapResource("slider2_thumb_normal.png"),
            Bitmap.getBitmapResource("slider2_progress_normal.png"),
            Bitmap.getBitmapResource("slider2_base_normal.png"),
            Bitmap.getBitmapResource("slider2_thumb_focused.png"),
            Bitmap.getBitmapResource("slider2_progress_focused.png"),
            Bitmap.getBitmapResource("slider2_base_focused.png"), 
            8, 4, 8, 8, FOCUSABLE);

        slider.setChangeListener(this);
        hm = new HorizontalFieldManager();
        hm.add(slider);
        setStatus(hm);
    }

    public void fieldChanged(Field field, int context) {
        try {
            if (field == slider) {
                int value = slider.getValue();
            }
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (NullPointerException e) {
            e.printStackTrace();
        }
    }    

and Finally get the SliderField Class and SliderImages From this BlackBerry Documents

you can get the seekbar images from BlackBerry samples