Textfield to scroll up automatically above virtual keyboard

The issue that I face in my bblwuit app is this:

I have a textfield, when clicking on it the virtual keyboard opens, which is fine. However, the text field is hidden behind the keyboard. How do I make the screen scroll auto开发者_如何学编程matically so that the textfield is visible above the virtual keyboard?

Thanks

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Use code like this

VerticalFieldManager vfm=new VerticalFieldManager(VERTICAL_SCROLL);
BasicEditField bef=new BasicEditField();
vfm.add(bef);
add(vfm);