//force to show overflow menu in actionbar for android 4.4 below
private void getOverflowMenu() { try { ViewConfiguration config = ViewConfiguration.get(this); Field menuKeyField = ViewConfiguration.class.getDeclaredField("sHasPermanentMenuKey"); if(menuKeyField != null) { menuKeyField.setAccessible(true); menuKeyField.setBoolean(config, false); } } catch (Exception e) { e.printStackTrace(); } }原文：http://www.cnblogs.com/wjhblogs/p/4740136.html