public class ActivityUtils {            /**            * 开启新的activity 并且关闭掉自己            */            public static void startActivityAndFinish(Activity context, Class<?> cls){                Intent intent = new Intent(context,cls);                context.startActivity(intent);                context.finish();            }                                    /**            * 开启新的activity             */            public static void startActivity(Activity context, Class<?> cls){                Intent intent = new Intent(context,cls);                context.startActivity(intent);            }        }