BlackBerry Tricks and Tips and Codes: How to Place a Field Vertically and Horizontally center in the Blackberry Screen

Thursday, July 23, 2009

How to Place a Field Vertically and Horizontally center in the Blackberry Screen

For placing a Field (for example HorizontalFieldManager) in center of the screen simple setting margin will do the trick.

Here is an example of placing a HorizontalFieldManager in the center.



        HorizontalFieldManager hfm = new HorizontalFieldManager();    
       
        LabelField testLabel1 = new LabelField( "Test Label1");    
        LabelField testLabel2 = new LabelField( "Test Label2");
        hfm.add(testLabel1);
        hfm.add(testLabel2);
        
        int leftEmptySpace = (Display.getWidth() - hfm.getPreferredWidth()) / 2;
        int topEmptySpace = (Display.getHeight() - hfm.getPreferredHeight()) / 2;
        hfm.setMargin(topEmptySpace, 0, 0, leftEmptySpace);
        
        //now add this manager to MainScreen
        this.add(hfm);