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);
    }

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());

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'

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-60a02f89 […]

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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