【Android N 7】使用量统计usagestats

Android N 7.1.1

高通

1. /data/system/usagestats/0

2. 每天使用量统计

/data/system/usagestats/0/daily

查看数值： cat 1497186009952 即可

frameworks/base/services/usage/java/com/android/server/usage/UserUsageStatsService.java

frameworks/base/services/usage/java/com/android/server/usage/UsageStatsDatabase.java

public UsageStatsDatabase(File dir) {
        mIntervalDirs = new File[] {
                new File(dir, "daily"),
                new File(dir, "weekly"),
                new File(dir, "monthly"),
                new File(dir, "yearly"),
        };
        mVersionFile = new File(dir, "version");
        mSortedStatFiles = new TimeSparseArray[mIntervalDirs.length];
        mCal = new UnixCalendar(0);
    }