lua数字保留小数点几位数的几个方法

Posted on 2021年3月3日 by 阿勇

1、使用string.format转换，再通过tonumber转换回来 [crayon-62c0f2dc74f […]

安卓java：检测设备否有GPS模块

Posted on 2021年2月18日 by 阿勇

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 […]

安卓java：统计指定时间段内的流量信息

Posted on 2021年1月26日2021年1月26日 by 阿勇

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. […]

安卓java：获取月初的时间戳

Posted on 2021年1月26日 by 阿勇

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();

}

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();

}

shell脚本中无法执行source命令

Posted on 2020年12月8日 by 阿勇

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 […]

openwrt linux下gpio watchdog dts文件配置

Posted on 2020年11月13日2020年11月13日 by 阿勇

由于项目需要，网关需要外接硬件看门狗，而且从网关上电开始就要开始喂狗，从uboot的代码中就开始了喂狗操作而 […]

中国移动光猫网关samba文件共享

Posted on 2020年11月1日 by 阿勇

家里拉了中国移动的光纤，送了光猫，带有USB口，可以做文件共享和USB打印机共享进入光猫的超级管理界面（进入 […]

Linux top load负载的解释

Posted on 2020年10月23日2020年10月23日 by 阿勇

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 […]

Linux termios 串口编程之 VTIME与VMIN

Posted on 2020年5月14日2020年5月14日 by 阿勇

转载于：http://blog.csdn.net/JAZZSOLDIER/article/details/55 […]

openwrt CC编译linkit7688固件问题–libmraa

Posted on 2020年5月6日 by 阿勇

错误现象

HEAD is now at 70600de mraa: update to version 0.8.0

error: Server does not allow request for unadvertised object 9cc90b7976252b2d14b7956230c5870097e1f008

Fetched in submodule path 'doxygen2jsdoc', but it did not contain 9cc90b7976252b2d14b7956230c5870097e1f008. Direct fetching of that commit failed.

Makefile:51: recipe for target '/home/joseph/openwrt/linkit-7688/dl/libmraa-0.8.0-70600dece4138b0c0dbaff42f57828f1559cd840.tar.gz' failed

make[3]: *** [/home/joseph/openwrt/linkit-7688/dl/libmraa-0.8.0-70600dece4138b0c0dbaff42f57828f1559cd840.tar.gz] Error 1

make[3]: Leaving directory '/home/joseph/openwrt/linkit-7688/feeds/packages/libs/libmraa'

package/Makefile:191: recipe for target 'package/feeds/packages/libmraa/compile' failed

make[2]: *** [package/feeds/packages/libmraa/compile] Error 2

make[2]: Leaving directory '/home/joseph/openwrt/linkit-7688'

https://blog.csdn […]

openwrt widroa编译automake错误Unescaped left brace in regex is illegal here in regex; marked by

Posted on 2020年4月29日 by 阿勇

使用github上widroa的openwrt编译固件遇见如下错误 Unescaped lef […]

jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000000: 0x7368 instead问题原因

Posted on 2020年4月17日 by 阿勇

记录一个openwrt路由器成砖的问题，以前也遇见过，但是忘记了，这次记下来 [crayon-62c0f2dc […]

OpenWrt下载网

openwrtdl.com分享下载

lua数字保留小数点几位数的几个方法

安卓java：检测设备否有GPS模块

安卓java：统计指定时间段内的流量信息

安卓java：获取月初的时间戳

shell脚本中无法执行source命令

openwrt linux下gpio watchdog dts文件配置

中国移动光猫网关samba文件共享

Linux top load负载的解释

Linux termios 串口编程之 VTIME与VMIN

openwrt CC编译linkit7688固件问题–libmraa

openwrt widroa编译automake错误Unescaped left brace in regex is illegal here in regex; marked by

jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000000: 0x7368 instead问题原因