Android:每小时获取使用情况统计

Question

我使用AndroidUsageStats功能，但最小的间隔是DAILY INTERVAL。

long time = System.currentTimeMillis();
List<UsageStats> appList = manager.queryUsageStats(UsageStatsManager.INTERVAL_DAILY, time - DAY_IN_MILLI_SECONDS, time);

如何每小时获得UsageStats？

Answer 1

所有的功劳都归功于这个答案。我从中吸取了教训。

我们如何收集自定义时间范围(例如每 1 小时(的应用使用情况数据？

我们必须调用queryEvents(long begin_time, long end_time)方法，因为它将为我们提供从begin_time到end_time的所有数据。它通过foreground和background事件为我们提供了每个应用程序数据，而不是像queryUsageStats()方法那样花费的总时间。因此，使用前台和后台事件时间戳，我们可以计算应用程序的启动次数，还可以找出每个应用程序的使用持续时间。

收集过去 1 小时应用使用情况数据的实现

首先，在AndroidManifest.xml文件中添加以下行，并请求用户获取使用访问权限。

<uses-permission android:name="android.permission.PACKAGE_USAGE_STATS" />

在任何方法中添加以下行

long hour_in_mil = 1000*60*60; // In Milliseconds
long end_time = System.currentTimeMillis();
long start_time = end_time - hour_in_mil;

然后，调用该方法getUsageStatistics()

getUsageStatistics(start_time, end_time);

getUsageStatistics methiod

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
void getUsageStatistics(long start_time, long end_time) {
UsageEvents.Event currentEvent;
//  List<UsageEvents.Event> allEvents = new ArrayList<>();
HashMap<String, AppUsageInfo> map = new HashMap<>();
HashMap<String, List<UsageEvents.Event>> sameEvents = new HashMap<>();
UsageStatsManager mUsageStatsManager = (UsageStatsManager)
context.getSystemService(Context.USAGE_STATS_SERVICE);
if (mUsageStatsManager != null) {
// Get all apps data from starting time to end time
UsageEvents usageEvents = mUsageStatsManager.queryEvents(start_time, end_time);
// Put these data into the map
while (usageEvents.hasNextEvent()) {
currentEvent = new UsageEvents.Event();
usageEvents.getNextEvent(currentEvent);
if (currentEvent.getEventType() == UsageEvents.Event.ACTIVITY_RESUMED ||
currentEvent.getEventType() == UsageEvents.Event.ACTIVITY_PAUSED) {
//  allEvents.add(currentEvent);
String key = currentEvent.getPackageName();
if (map.get(key) == null) {
map.put(key, new AppUsageInfo(key));
sameEvents.put(key,new ArrayList<UsageEvents.Event>());
}
sameEvents.get(key).add(currentEvent);
}
}
// Traverse through each app data which is grouped together and count launch, calculate duration
for (Map.Entry<String,List<UsageEvents.Event>> entry : sameEvents.entrySet()) {
int totalEvents = entry.getValue().size();
if (totalEvents > 1) {
for (int i = 0; i < totalEvents - 1; i++) {
UsageEvents.Event E0 = entry.getValue().get(i);
UsageEvents.Event E1 = entry.getValue().get(i + 1);
if (E1.getEventType() == 1 || E0.getEventType() == 1) {
map.get(E1.getPackageName()).launchCount++;
}
if (E0.getEventType() == 1 && E1.getEventType() == 2) {
long diff = E1.getTimeStamp() - E0.getTimeStamp();
map.get(E0.getPackageName()).timeInForeground += diff;
}
}
}
// If First eventtype is ACTIVITY_PAUSED then added the difference of start_time and Event occuring time because the application is already running.
if (entry.getValue().get(0).getEventType() == 2) {
long diff = entry.getValue().get(0).getTimeStamp() - start_time;
map.get(entry.getValue().get(0).getPackageName()).timeInForeground += diff;
}

// If Last eventtype is ACTIVITY_RESUMED then added the difference of end_time and Event occuring time because the application is still running .
if (entry.getValue().get(totalEvents - 1).getEventType() == 1) {
long diff = end_time - entry.getValue().get(totalEvents - 1).getTimeStamp();
map.get(entry.getValue().get(totalEvents - 1).getPackageName()).timeInForeground += diff;
}
}

smallInfoList = new ArrayList<>(map.values());
// Concatenating data to show in a text view. You may do according to your requirement
for (AppUsageInfo appUsageInfo : smallInfoList)
{
// Do according to your requirement
strMsg = strMsg.concat(appUsageInfo.packageName + " : " + appUsageInfo.launchCount + "nn");
}
TextView tvMsg = findViewById(R.id.MA_TvMsg);
tvMsg.setText(strMsg);

} else {
Toast.makeText(context, "Sorry...", Toast.LENGTH_SHORT).show();
}
}

应用使用信息.class

import android.graphics.drawable.Drawable;
class AppUsageInfo {
Drawable appIcon; // You may add get this usage data also, if you wish.
String appName, packageName;
long timeInForeground;
int launchCount;
AppUsageInfo(String pName) {
this.packageName=pName;
}
}

如何自定义这些代码以收集每 1 小时的数据？

如果要获取每小时数据，请更改每小时数据的end_time和start_time值。例如：如果我尝试收集过去每小时的数据(过去 2 小时的数据(。我会做以下事情。

long end_time = System.currentTimeMillis();
long start_time = end_time - (1000*60*60);
getUsageStatistics(start_time, end_time);
end_time =  start_time;
start_time = start_time - hour_in_mil;
getUsageStatistics(start_time, end_time);

但是，您可以使用Handler跳过重复编写start_time，end_time更改这些变量的值。每次收集一小时的数据时，将完成一个任务，在自动更改变量的值后，您将再次调用getUsageStatistics方法。

注意：也许，您将无法检索超过7.5天的数据，因为系统仅将事件保留几天。

Answer 2

Calendar cal = (Calendar) Calendar.getInstance().clone();
//I used this and it worked, only for 7 days and a half ago 
if (daysAgo == 0) {
//Today - I only count from 00h00m00s today to present
end = cal.getTimeInMillis();
start = LocalDate.now().toDateTimeAtStartOfDay().toInstant().getMillis();
} else {
long todayStartOfDayTimeStamp = LocalDate.now().toDateTimeAtStartOfDay().toInstant().getMillis();
if (mDaysAgo == -6) {
//6 days ago, only get events in time -7 days to -7.5 days
cal.setTimeInMillis(System.currentTimeMillis());
cal.add(Calendar.DATE, daysAgo + 1);
end = cal .getTimeInMillis();
start = end - 43200000;
} else {
//get events from 00h00m00s to  23h59m59s
//Current calendar point to 0h0m today
cal.setTimeInMillis(todayStartOfDayTimeStamp);
cal.add(Calendar.DATE, daysAgo + 1);
end = calendar.getTimeInMillis();
cal.add(Calendar.DATE, -1);
start = calendar.getTimeInMillis();
}
}

Answer 3

我认为这是不可能的，即使您在间隔中间请求数据，看起来数据也存储在存储桶中，最小存储桶是一天。 在UsageStatsManager文档中，它说：

在时间间隔

中间请求数据将包括该时间间隔。

此外，INTERVAL_BEST不是实际间隔，它只是选择给定时间范围内的可用间隔之一。在 UsageStatsManager.java源代码，它说：

/**
* The number of available intervals. Does not include {@link #INTERVAL_BEST}, since it
* is a pseudo interval (it actually selects a real interval).
* {@hide}
*/
public static final int INTERVAL_COUNT = 4;

Answer 4

是的，Android 提供了最低INTERVAL_DAILY。但为了获得最佳效果，您可以使用INTERVAL_BEST.Android 正在为给定的时间范围提供最佳间隔计时器queryUsageStats(int, long, long).

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