我正在使用UsageStatsManager API来获取特定时间间隔的使用情况统计信息。如果我使用预定义的间隔,即INTERVAL_DAILY、INTERVAL_WEEKLY、INTERVAL_MONTHLY INTERVAL_YEARLY,一切正常。但是,如果我想查看过去 2 或 3 小时的数据,我将获得一整天的数据。我尝试使用日历和System.currentTimeMillis(),但这并没有给我过滤的结果。
日历方法:
Calendar startCalendar = Calendar.getInstance();
startCalendar.add(Calendar.HOUR_OF_DAY, -2);
Calendar endCalendar = Calendar.getInstance();
并将其传递给queryUsageStats方法,如下所示:
usageList = usm.queryUsageStats(interval, startCalendar.getTimeInMillis(), endCalendar.getTimeInMillis());
其中间隔为 INTERVAL_BEST。
System.currentTimeMillis() 方法:
long startTime = System.currentTimeMillis() - 7200*1000 // 7200 seconds i.e. 2 hrs
long endTime = System.currentTimeMillis();
将其传递给queryUsageStats,就像上面一样:
usageList = usm.queryUsageStats(interval, startTime, endTime);
其中间隔再次INTERVAL_BEST。
我想知道是否有可能获取此持续时间(即不到一天)的数据,因为INTERVAL_BEST尚未正确记录以包含此信息。任何帮助将不胜感激,因为我被困在这个问题上。
正如UsageStatsManager文档所说:
在时间间隔使用情况中间请求数据将包括该时间间隔。
数据存储在存储桶中,最小存储桶为一天,因此您无法查询少于一天的时间段的使用情况统计信息。即使查询特定日期的一小时间隔,也会返回全天的使用情况统计信息。
有点晚了,但我认为这对某些人可能有用。
您可以使用 UsageStatsManager 中的queryEvents(long startTime, long endTime)
来实现所需的结果。该方法可能如下所示(灵感来自这篇文章):
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public HashMap<String, AppUsageInfo> queryUsageStatistics(Context context, long startTime, long endTime) {
UsageEvents.Event currentEvent;
List<UsageEvents.Event> allEvents = new ArrayList<>();
HashMap<String, AppUsageInfo> map = new HashMap<>();
UsageStatsManager mUsageStatsManager = (UsageStatsManager) context.getSystemService(Context.USAGE_STATS_SERVICE);
assert mUsageStatsManager != null;
// Here we query the events from startTime till endTime.
UsageEvents usageEvents = mUsageStatsManager.queryEvents(startTime, endTime);
// go over all events.
while (usageEvents.hasNextEvent()) {
currentEvent = new UsageEvents.Event();
usageEvents.getNextEvent(currentEvent);
String packageName = currentEvent.getPackageName();
if (currentEvent.getEventType() == UsageEvents.Event.ACTIVITY_RESUMED || currentEvent.getEventType() == UsageEvents.Event.ACTIVITY_PAUSED ||
currentEvent.getEventType() == UsageEvents.Event.ACTIVITY_STOPPED) {
allEvents.add(currentEvent); // an extra event is found, add to all events list.
// taking it into a collection to access by package name
if (!map.containsKey(packageName)) {
map.put(packageName, new AppUsageInfo());
}
}
}
// iterate through all events.
for (int i = 0; i < allEvents.size() - 1; i++) {
UsageEvents.Event event0 = allEvents.get(i);
UsageEvents.Event event1 = allEvents.get(i + 1);
//for launchCount of apps in time range
if (!event0.getPackageName().equals(event1.getPackageName()) && event1.getEventType() == UsageEvents.Event.ACTIVITY_RESUMED) {
// if true, E1 (launch event of an app) app launched
Objects.requireNonNull(map.get(event1.getPackageName())).launchCount++;
}
//for UsageTime of apps in time range
if (event0.getEventType() == UsageEvents.Event.ACTIVITY_RESUMED &&
(event1.getEventType() == UsageEvents.Event.ACTIVITY_PAUSED || event1.getEventType() == UsageEvents.Event.ACTIVITY_STOPPED)
&& event0.getPackageName().equals(event1.getPackageName())) {
long diff = event1.getTimeStamp() - event0.getTimeStamp();
Objects.requireNonNull(map.get(event0.getPackageName())).timeInForeground += diff;
}
}
// and return the map.
return map;
}
类将是:
public class AppUsageInfo {
public long timeInForeground;
public int launchCount;
AppUsageInfo() {
this.timeInForeground = 0;
this.launchCount = 0;
}
}
要获取过去两个小时的使用情况统计信息,只需调用
Calendar startCalendar = Calendar.getInstance();
startCalendar.add(Calendar.HOUR_OF_DAY, -2);
Calendar endCalendar = Calendar.getInstance();
HashMap<String, AppUsageInfo> result = queryUsageStatistics(context, startCalendar.getTimeInMillis(), endCalendar.getTimeInMillis();