今天开发时遇见一个需要替换字符串的操作 大致的需求如下：实现一个字符串替换函数strreplace(char* […]
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国内外免费公共mqtt broker
国内免费公共mqtt broker 服务器地址 服务器类型 开发 端口 Websocket test.jmqt […]
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目前比较知名的进程监控程序是C语言实现的monit和python实现的supervisor 其中monit比较 […]
Continue reading...shell中$!的妙用
今天本来想写个runner的程序，用于运行一个程序，并获取这个进程的pid、运行时间、运行log、错误log等 […]
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systemctl 如何启动、关闭、启用/禁用服务
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Continue reading...安卓java：检测设备否有GPS模块
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public boolean hasGPSDevice(Context context) { final LocationManager mgr = (LocationManager)context.getSystemService(Context.LOCATION_SERVICE); if ( mgr == null ) return false; final List<String> providers = mgr.getAllProviders(); if ( providers == null ) return false; return providers.contains(LocationManager.GPS_PROVIDER); } |
参考：https://blog.csdn.n […]
Continue reading...安卓java：统计指定时间段内的流量信息
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import android.app.usage.NetworkStatsManager; private NetworkStatsManager networkStatsManager; networkStatsManager = (NetworkStatsManager) context.getApplicationContext().getSystemService(NETWORK_STATS_SERVICE); NetworkStats.Bucket bucket = null; bucket = networkStatsManager.querySummaryForDevice(ConnectivityManager.TYPE_MOBILE, telephonyManager.getSubscriberId(), monthStart, System.currentTimeMillis()); Logger.i("month Total rx: " + bucket.getRxBytes() +" tx = " + bucket.getTxBytes()); bucket = networkStatsManager.querySummaryForDevice(ConnectivityManager.TYPE_MOBILE, telephonyManager.getSubscriberId(), todayStart, System.currentTimeMillis()); Logger.i("today Total rx: " + bucket.getRxBytes() +" tx = " + bucket.getTxBytes()); |
使用networkStatsManager. […]
Continue reading...安卓java：获取月初的时间戳
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public static long getTimestampOfbeginningMonth(){ /* // 获取当前年份、月份、日期 Calendar cale = null; cale = Calendar.getInstance(); int year = cale.get(Calendar.YEAR); int month = cale.get(Calendar.MONTH) + 1; int day = cale.get(Calendar.DATE); int hour = cale.get(Calendar.HOUR_OF_DAY); int minute = cale.get(Calendar.MINUTE); int second = cale.get(Calendar.SECOND); int dow = cale.get(Calendar.DAY_OF_WEEK); int dom = cale.get(Calendar.DAY_OF_MONTH); int doy = cale.get(Calendar.DAY_OF_YEAR); ShuncomLogger.i("Current Date: " + cale.getTime()); ShuncomLogger.i("Year: " + year); ShuncomLogger.i("Month: " + month); ShuncomLogger.i("Day: " + day); ShuncomLogger.i("Hour: " + hour); ShuncomLogger.i("Minute: " + minute); ShuncomLogger.i("Second: " + second); ShuncomLogger.i("Day of Week: " + dow); ShuncomLogger.i("Day of Month: " + dom); ShuncomLogger.i("Day of Year: " + doy); // 获取当月第一天和最后一天 SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd"); String firstday, lastday; // 获取前月的第一天 cale = Calendar.getInstance(); cale.add(Calendar.MONTH, 0); cale.set(Calendar.DAY_OF_MONTH, 1); firstday = format.format(cale.getTime()); // 获取前月的最后一天 cale = Calendar.getInstance(); cale.add(Calendar.MONTH, 1); cale.set(Calendar.DAY_OF_MONTH, 0); lastday = format.format(cale.getTime()); ShuncomLogger.i("本月第一天和最后一天分别是 ： " + firstday + " and " + lastday); */ Calendar calendar = Calendar.getInstance();// 获取当前日期 calendar.add(Calendar.MONTH, 0); calendar.set(Calendar.DAY_OF_MONTH, 1);// 设置为1号,当前日期既为本月第一天 calendar.set(Calendar.HOUR_OF_DAY, 0); calendar.set(Calendar.MINUTE, 0); calendar.set(Calendar.SECOND, 0); ShuncomLogger.i("月初的时间戳："+String.valueOf(calendar.getTimeInMillis())); return calendar.getTimeInMillis(); } public static long getTimestampOfbeginningToday(){ Calendar calendar = Calendar.getInstance();// 获取当前日期 //calendar.add(Calendar.MONTH, 0); //calendar.add(Calendar.DAY_OF_MONTH, 0); calendar.set(Calendar.HOUR_OF_DAY, 0); calendar.set(Calendar.MINUTE, 0); calendar.set(Calendar.SECOND, 0); ShuncomLogger.i("今天开始的时间戳："+String.valueOf(calendar.getTimeInMillis())); return calendar.getTimeInMillis(); } |
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shell脚本中无法执行source命令
今天写了个简单的自动编译脚本，在执行编译前需要先引入一个环境变量文件，用到了source命令 然后执行脚本时却 […]
Continue reading...Linux top load负载的解释
原因总结 产生的原因一句话总结就是：等待磁盘I/O完成的进程过多，导致进程队列长度过大，但是cpu运行的进程却 […]
Continue reading...Linux termios 串口编程之 VTIME与VMIN
转载于：http://blog.csdn.net/JAZZSOLDIER/article/details/55 […]
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