DEV Tạo Pop-up screen

Pop-up Screen cho phép pop up 1 cửa sổ thông tin đơn giản ngắn gọn như About, Info...

Mã:

/*
* AboutScreen.java
*
* © Viet Hop Software, 2012
* Confidential and proprietary.
*
* Developer: Aric
* Email: sd@viethop.net
*/
 
import net.rim.device.api.system.Characters;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.component.SeparatorField;
import net.rim.device.api.ui.container.PopupScreen;
import net.rim.device.api.ui.container.VerticalFieldManager;
import net.rim.device.api.system.ApplicationDescriptor;
 
/**
* PopupScreen that displays information about the application
*/
 
 
final class AboutScreen extends PopupScreen
{
    /**
    * Constructor.
    */
    AboutScreen()
    {
        super(new VerticalFieldManager());
      super(new HorizontalFieldManager(NO_VERTICAL_SCROLL));
        ApplicationDescriptor appDesc = ApplicationDescriptor.currentApplicationDescriptor();
   
BitmapField bitmap = new BitmapField(appDesc.getIcon(), FIELD_VCENTER);
bitmap.setMargin(5, 5, 5, 5);
add(bitmap);
 
        VerticalFieldManager vfm = new VerticalFieldManager();
 
        vfm.add(new LabelField(appDesc.getName() + " - Ver. " + appDesc.getVersion()));
 
        vfm.add(new SeparatorField());
        vfm.add(new LabelField("sd@viethop.net\nViet Hop Software © 2012"));
    }
 
 
    /**
    * Overrides the default.  Closes the popup screen when the Escape key is pressed.
    *
    * @see net.rim.device.api.ui.Screen#keyChar(char,int,int)
    */
    public boolean keyChar(char c, int status, int time)
    {
        if (c == Characters.ESCAPE)  // Đóng cửa sổ khi người dùng nhấn Escape.
        {
            close();
            return true;
        }
   
        return super.keyChar(c, status, time);
    }
}

​

Hình 1: Minh họa Pop-up Screen​