Application Screen

import appuifw import e32  def exit_key_handler():     app_lock.signal()   round = appuifw.Text() round.set(u'hello')  # put the application screen size to full screen appuifw.app.screen='full' #(a full screen)  # other options: #appuifw.app.screen='normal' #(a normal screen with title pane and softkeys) #appuifw.app.screen='large' #(only softkeys visible)    app_lock = e32.Ao_lock()  appuifw.app.body = round  appuifw.app.exit_key_handler = exit_key_handler app_lock.wait()