activty开启关闭工具类

    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);  
        }  
    }