Question

我正在使用此link来生成应用使用状态。我对所选时间间隔的理解是，对于YEARLY时间间隔，它会在YEAR和beginTime持续时间之间汇总每个包的每个endTime的数据。同样，它应该适用于WEEKLY和DAILY间隔。

使用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，如果我将INTERVAL.DAILY用于上述代码，我只会得到前三行。我的间隔足够大，应该包含此间隔之间所有包的所有数据。

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

我做错了什么或者我对聚合间隔的理解不正确？任何帮助，将不胜感激。感谢。

EDIT1

在/ data / system / usagestats文件夹中查看statsfile android存储库后，我发现每日统计信息有两个文件，每周统计信息一个，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>

这整个数据似乎搞砸了。对于相同的浏览器应用程序，每天存储不同的结果和每周商店不同。

Answer 1

根据谷歌发布文档。

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

系统按应用程序收集使用情况数据，以每日，每周，每月和每年的间隔汇总数据。系统保留此数据的最长持续时间如下：

每日数据：7天

每周数据：4周

每月数据：6个月

每年数据：2年

如果您希望获得超过7天7天的统计数据，请将时间间隔从INTERVAL_DAILY更改为INTERVAL_WEEKLY或INTERVAL_YEARLY。这里有更多相同的细节。

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

Answer 2

可能搞砸了。您不能信任queryUsageStats的结果。

就我而言，请调用

queryUsageStats(UsageStatsManager.INTERVAL_DAILY, 0, today)

显示过去七天的结果并调用

queryUsageStats(UsageStatsManager.INTERVAL_DAILY, few-days-ago, today)

仅显示今天的结果。几天前和今天是指定日期的毫秒数。检查今天的结果表明，当今晚些时候使用的其他应用程序存在时，缺少某个应用程序的使用。

Android UsageStatsManager产生错误的输出？

2 个答案: