Android UsageStatsManager产生错误的输出? [英] Android UsageStatsManager producing wrong output?

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问题描述

我正在使用此链接来生成应用使用状态.我对选定间隔的理解是，对于YEARLY间隔，它会为beginTime和endTime持续时间之间的每个包装汇总每个YEAR的数据.同样，它应该在WEEKLY和DAILY间隔内工作.

对于WEEKLY，我的代码和输出如下所示；

代码:

Calendar beginCal = Calendar.getInstance();
beginCal.set(Calendar.DATE, 1);
beginCal.set(Calendar.MONTH, 0);
beginCal.set(Calendar.YEAR, 2012);

Calendar endCall = Calendar.getInstance();
endCall.set(Calendar.DATE, 1);
endCall.set(Calendar.MONTH, 0);
endCall.set(Calendar.YEAR, 2016);

final List<UsageStats> queryUsagesStats= mUsageStatsManager.queryUsageStats(UsageStatsManager.INTERVAL_WEEKLY, beginCal.getTimeInMillis(), endCall.getTimeInMillis());    

for(UsageStats us: queryUsagesStats)
{
    long beginTime = us.getFirstTimeStamp();
    String beginDate = df.format(new Date(beginTime));


    long endTime = us.getLastTimeStamp();
    String endDate = df.format(new Date(endTime));
    String lastTime = df.format(new Date(us.getLastTimeUsed()));
    long totalTimeInForeground = us.getTotalTimeInForeground()/1000L;
    System.out.println("Pkg = " + us.getPackageName() + ", beginTime " + beginDate + ", endTime= " + endDate + ", lastTime = " + lastTime + ", totalTime = " + totalTimeInForeground);
}

输出:

Pkg = com.example.newappusagestatistics, beginTime 05/20/2015 17:00:04, endTime= 05/21/2015 17:55:42, lastTime = 05/21/2015 17:55:42, totalTime = 11186
Pkg = com.android.launcher, beginTime 05/20/2015 17:00:04, endTime= 05/21/2015 17:55:42, lastTime = 05/21/2015 17:55:42, totalTime = 1091
Pkg = com.android.browser, beginTime 05/20/2015 17:00:04, endTime= 05/21/2015 17:15:27, lastTime = 05/21/2015 17:15:27, totalTime = 68
Pkg = com.android.sdksetup, beginTime 05/20/2015 17:00:04, endTime= 01/01/1970 15:59:55, lastTime = 05/21/2015 14:41:08, totalTime = 1194
Pkg = com.android.camera, beginTime 05/20/2015 17:00:04, endTime= 01/01/1970 15:59:55, lastTime = 05/21/2015 14:55:32, totalTime = 40
Pkg = com.android.settings, beginTime 05/20/2015 17:00:04, endTime= 01/01/1970 15:59:55, lastTime = 05/21/2015 16:15:19, totalTime = 97
Pkg = com.android.systemui, beginTime 05/20/2015 17:00:04, endTime= 01/01/1970 15:59:55, lastTime = 05/21/2015 14:47:45, totalTime =

但是，如果我在上面的代码中使用INTERVAL.DAILY，则只会得到前三行.我的间隔足够大，它应该包含此间隔之间所有软件包的所有数据.

Pkg = com.example.newappusagestatistics, beginTime 05/21/2015 17:00:00, endTime= 05/21/2015 17:59:18, lastTime = 05/21/2015 17:59:18, totalTime = 3484
Pkg = com.android.launcher, beginTime 05/21/2015 17:00:00, endTime= 05/21/2015 17:59:18, lastTime = 05/21/2015 17:59:18, totalTime = 27
Pkg = com.android.browser, beginTime 05/21/2015 17:00:00, endTime= 05/21/2015 17:15:27, lastTime = 05/21/2015 17:15:27, totalTime = 43

我做错了什么还是对聚合间隔的理解不正确?任何帮助，将不胜感激.谢谢.

编辑1

在/data/system/usagestats文件夹中查看android的stats文件后，我发现有两个文件用于每日统计，一个文件用于每周统计，如下所示.

每日文件1 

<usagestats version="1" endTime="59366071">
<packages>
<package lastTimeActive="59366071" package="com.example.newappusagestatistics" timeActive="4064908" lastEvent="1"/>
<package lastTimeActive="59366020" package="com.android.launcher" timeActive="813728" lastEvent="2"/>
<package lastTimeActive="927475" package="com.android.browser" timeActive="43838" lastEvent="2"/>
</packages>

每日文件2 

<usagestats version="1" endTime="86395657">
    <packages>
        <package lastTimeActive="86395657" package="com.example.newappusagestatistics" timeActive="7916365" lastEvent="3" />
        <package lastTimeActive="85743386" package="com.android.launcher" timeActive="1064651" lastEvent="2" />
        <package lastTimeActive="78961499" package="com.android.browser" timeActive="24715" lastEvent="2" />
        <package lastTimeActive="78063875" package="com.android.sdksetup" timeActive="1194161" lastEvent="3" />
        <package lastTimeActive="78928555" package="com.android.camera" timeActive="40775" lastEvent="2" />
        <package lastTimeActive="83715390" package="com.android.settings" timeActive="97012" lastEvent="2" />
        <package lastTimeActive="78461328" package="com.android.systemui" timeActive="4162" lastEvent="2" />
    </packages>

每周

<usagestats version="1" endTime="145761729">
    <packages>
        <package lastTimeActive="145761729" package="com.example.newappusagestatistics" timeActive="11981273" lastEvent="1" />
        <package lastTimeActive="145761678" package="com.android.launcher" timeActive="1878379" lastEvent="2" />
        <package lastTimeActive="87323133" package="com.android.browser" timeActive="68553" lastEvent="2" />
        <package lastTimeActive="78063875" package="com.android.sdksetup" timeActive="1194161" lastEvent="3" />
        <package lastTimeActive="78928555" package="com.android.camera" timeActive="40775" lastEvent="2" />
        <package lastTimeActive="83715390" package="com.android.settings" timeActive="97012" lastEvent="2" />
        <package lastTimeActive="78461328" package="com.android.systemui" timeActive="4162" lastEvent="2" />
    </packages>

整个数据似乎被弄乱了.对于同一浏览器应用程序，每天存储不同的结果，而每周存储不同的结果.

解决方案

根据Google发布文档.

( https://developer.android.com/about/versions/android-5.0.html#System )

系统会按应用收集使用情况数据，并按每天，每周，每月和每年的时间间隔汇总数据.系统保留此数据的最大持续时间如下:

每日数据:7天

每周数据:4周

每月数据:6个月

年度数据:2年

如果要获取7天以上的统计数据，则将时间间隔从INTERVAL_DAILY更改为INTERVAL_WEEKLY或INTERVAL_YEARLY. 这里是关于它的更多细节.

https://developer.android.com/reference/android/app/usage/UsageStatsManager.html

I am using this link to produce app usage states. My understanding with chosen interval is that for YEARLY interval, it aggregates data for each YEAR for each package between beginTime and endTime duration. Similarly, it should work for WEEKLY and DAILY intervals.

With WEEKLY, my code and output is given below;

Code:

Calendar beginCal = Calendar.getInstance();
beginCal.set(Calendar.DATE, 1);
beginCal.set(Calendar.MONTH, 0);
beginCal.set(Calendar.YEAR, 2012);

Calendar endCall = Calendar.getInstance();
endCall.set(Calendar.DATE, 1);
endCall.set(Calendar.MONTH, 0);
endCall.set(Calendar.YEAR, 2016);

final List<UsageStats> queryUsagesStats= mUsageStatsManager.queryUsageStats(UsageStatsManager.INTERVAL_WEEKLY, beginCal.getTimeInMillis(), endCall.getTimeInMillis());    

for(UsageStats us: queryUsagesStats)
{
    long beginTime = us.getFirstTimeStamp();
    String beginDate = df.format(new Date(beginTime));


    long endTime = us.getLastTimeStamp();
    String endDate = df.format(new Date(endTime));
    String lastTime = df.format(new Date(us.getLastTimeUsed()));
    long totalTimeInForeground = us.getTotalTimeInForeground()/1000L;
    System.out.println("Pkg = " + us.getPackageName() + ", beginTime " + beginDate + ", endTime= " + endDate + ", lastTime = " + lastTime + ", totalTime = " + totalTimeInForeground);
}

output:

Pkg = com.example.newappusagestatistics, beginTime 05/20/2015 17:00:04, endTime= 05/21/2015 17:55:42, lastTime = 05/21/2015 17:55:42, totalTime = 11186
Pkg = com.android.launcher, beginTime 05/20/2015 17:00:04, endTime= 05/21/2015 17:55:42, lastTime = 05/21/2015 17:55:42, totalTime = 1091
Pkg = com.android.browser, beginTime 05/20/2015 17:00:04, endTime= 05/21/2015 17:15:27, lastTime = 05/21/2015 17:15:27, totalTime = 68
Pkg = com.android.sdksetup, beginTime 05/20/2015 17:00:04, endTime= 01/01/1970 15:59:55, lastTime = 05/21/2015 14:41:08, totalTime = 1194
Pkg = com.android.camera, beginTime 05/20/2015 17:00:04, endTime= 01/01/1970 15:59:55, lastTime = 05/21/2015 14:55:32, totalTime = 40
Pkg = com.android.settings, beginTime 05/20/2015 17:00:04, endTime= 01/01/1970 15:59:55, lastTime = 05/21/2015 16:15:19, totalTime = 97
Pkg = com.android.systemui, beginTime 05/20/2015 17:00:04, endTime= 01/01/1970 15:59:55, lastTime = 05/21/2015 14:47:45, totalTime =

However, if I use INTERVAL.DAILY for the above code, I only get the first three lines. My interval is big enough that it should contain all the data for all the packages between this interval.

Pkg = com.example.newappusagestatistics, beginTime 05/21/2015 17:00:00, endTime= 05/21/2015 17:59:18, lastTime = 05/21/2015 17:59:18, totalTime = 3484
Pkg = com.android.launcher, beginTime 05/21/2015 17:00:00, endTime= 05/21/2015 17:59:18, lastTime = 05/21/2015 17:59:18, totalTime = 27
Pkg = com.android.browser, beginTime 05/21/2015 17:00:00, endTime= 05/21/2015 17:15:27, lastTime = 05/21/2015 17:15:27, totalTime = 43

Am I doing something wrong or my understanding about aggregate intervals is not correct? Any help would be appreciated. Thanks.

Edit1

After looking into the statsfile android stores at /data/system/usagestats folder, I found two files for daily stats and one for weekly stats as given below.

daily file1

<usagestats version="1" endTime="59366071">
<packages>
<package lastTimeActive="59366071" package="com.example.newappusagestatistics" timeActive="4064908" lastEvent="1"/>
<package lastTimeActive="59366020" package="com.android.launcher" timeActive="813728" lastEvent="2"/>
<package lastTimeActive="927475" package="com.android.browser" timeActive="43838" lastEvent="2"/>
</packages>

daily file2

<usagestats version="1" endTime="86395657">
    <packages>
        <package lastTimeActive="86395657" package="com.example.newappusagestatistics" timeActive="7916365" lastEvent="3" />
        <package lastTimeActive="85743386" package="com.android.launcher" timeActive="1064651" lastEvent="2" />
        <package lastTimeActive="78961499" package="com.android.browser" timeActive="24715" lastEvent="2" />
        <package lastTimeActive="78063875" package="com.android.sdksetup" timeActive="1194161" lastEvent="3" />
        <package lastTimeActive="78928555" package="com.android.camera" timeActive="40775" lastEvent="2" />
        <package lastTimeActive="83715390" package="com.android.settings" timeActive="97012" lastEvent="2" />
        <package lastTimeActive="78461328" package="com.android.systemui" timeActive="4162" lastEvent="2" />
    </packages>

Weekly

<usagestats version="1" endTime="145761729">
    <packages>
        <package lastTimeActive="145761729" package="com.example.newappusagestatistics" timeActive="11981273" lastEvent="1" />
        <package lastTimeActive="145761678" package="com.android.launcher" timeActive="1878379" lastEvent="2" />
        <package lastTimeActive="87323133" package="com.android.browser" timeActive="68553" lastEvent="2" />
        <package lastTimeActive="78063875" package="com.android.sdksetup" timeActive="1194161" lastEvent="3" />
        <package lastTimeActive="78928555" package="com.android.camera" timeActive="40775" lastEvent="2" />
        <package lastTimeActive="83715390" package="com.android.settings" timeActive="97012" lastEvent="2" />
        <package lastTimeActive="78461328" package="com.android.systemui" timeActive="4162" lastEvent="2" />
    </packages>

This whole data seems to be messed up. For same browser app, daily stores different results and weekly stores different.

解决方案

According to google release documentation.

(https://developer.android.com/about/versions/android-5.0.html#System)

The system collects the usage data on a per-app basis, aggregating the data over daily, weekly, monthly, and yearly intervals. The maximum duration that the system keeps this data is as follows:

Daily data: 7 days

Weekly data: 4 weeks

Monthly data: 6 months

Yearly data: 2 years

If you want to get stats for older than 7 seven days changes time interval from INTERVAL_DAILY to INTERVAL_WEEKLY or INTERVAL_YEARLY. here is more detail about the same.

https://developer.android.com/reference/android/app/usage/UsageStatsManager.html

这篇关于Android UsageStatsManager产生错误的输出?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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