How to use

setPreferredDisplayMode

method

in

com.example.android.apis.app.PresentationActivity$DemoPresentation

/**
 * Sets the display mode of the {@link Presentation} on the specified display
 * if it is already shown.
 */
private void setPresentationDisplayMode(Display display, int displayModeId) {
  final int displayId = display.getDisplayId();
  DemoPresentation presentation = mActivePresentations.get(displayId);
  if (presentation == null) {
    return;
  }
  presentation.setPreferredDisplayMode(displayModeId);
}