java - 我得到了在 networkstatsmanager.querydetailsforuid() 方法中提供的不同的 startTimestamp 和 endtimestamp 。怎么解决呢？

Question

获取我在 NetworkStatsManager.queryDetailsForUid 中提供的不同开始时间和结束时间这是我的代码 fragment :

我想获取开始时间和结束时间间隔内的应用程序数据使用情况我正在调用方法并以毫秒为单位传递日历中的开始日期和结束日期，但在调用 queryDetailsForUid() 之后它显示一些不同的时间:

Calendar cal1 = Calendar.getInstance();
Date end = cal1.getTime();
Calendar cal = Calendar.getInstance();
cal.add(Calendar.DATE, -100);
long start = cal.getTime().getTime();

long s = getPackageTxBytesMobile(uid, cal.getTimeInMillis(), cal1.getTimeInMillis());
long r = getPackageRxBytesMobile(uid, cal.getTimeInMillis(), cal1.getTimeInMillis());

方法如下:

public long getPackageTxBytesMobile(int uid, long startDate, long endDate) {
    NetworkStats networkStats = null;

    NetworkStatsManager networkStatsManager = (NetworkStatsManager) 
    context1.getSystemService(Context.NETWORK_STATS_SERVICE);
    TelephonyManager tm = (TelephonyManager)context1.getSystemService(Context.TELEPHONY_SERVICE);
    String subId = null;
    if(ActivityCompat.checkSelfPermission(context1, Manifest.permission.READ_PHONE_STATE) ==
            PackageManager.PERMISSION_GRANTED) {
        subId = tm.getSubscriberId();
    }
    Log.d("Startdate: ",""+startDate+"   ");
    Log.d("Enddate: ",""+endDate+"    ");
    try {
        networkStats = networkStatsManager.queryDetailsForUid(
                ConnectivityManager.TYPE_MOBILE,
                subId,
                startDate,
                endDate ,
                uid);
    } catch (Exception e) {
        return -1;
    }
    NetworkStats.Bucket bucket = new NetworkStats.Bucket();
    networkStats.getNextBucket(bucket);
    long tx = bucket.getTxBytes();
    Log.d("tag1","StartTime: "+bucket.getStartTimeStamp());
    Log.d("tag1","EndTime: "+bucket.getEndTimeStamp());

    networkStats.close();
    return tx;
}

这是日志输出:

2020-04-25 10:08:47.248 17889-17889/com.pkdev.mdmtemp D/tag1: StartTime: 1579168800000
2020-04-25 10:08:47.248 17889-17889/com.pkdev.mdmtemp D/tag1: EndTime: 1579176000000
2020-04-25 10:08:47.280 17889-17889/com.pkdev.mdmtemp D/Startdate:: 1579149527275   
2020-04-25 10:08:47.280 17889-17889/com.pkdev.mdmtemp D/Enddate:: 1587789527275    
2020-04-25 10:08:47.284 17889-17889/com.pkdev.mdmtemp D/tag1: StartTime: 1579154400000
2020-04-25 10:08:47.284 17889-17889/com.pkdev.mdmtemp D/tag1: EndTime: 1579161600000
2020-04-25 10:08:47.324 17889-17889/com.pkdev.mdmtemp D/Startdate:: 1579149527321   
2020-04-25 10:08:47.324 17889-17889/com.pkdev.mdmtemp D/Enddate:: 1587789527320    
2020-04-25 10:08:47.326 17889-17889/com.pkdev.mdmtemp D/tag1: StartTime: 1582466400000
2020-04-25 10:08:47.326 17889-17889/com.pkdev.mdmtemp D/tag1: EndTime: 1582473600000
2020-04-25 10:08:47.360 17889-17889/com.pkdev.mdmtemp D/Startdate:: 1579149527357   
2020-04-25 10:08:47.360 17889-17889/com.pkdev.mdmtemp D/Enddate:: 1587789527357    
2020-04-25 10:08:47.365 17889-17889/com.pkdev.mdmtemp D/tag1: StartTime: 1579161600000
2020-04-25 10:08:47.365 17889-17889/com.pkdev.mdmtemp D/tag1: EndTime: 1579168800000

Answer 1

您仅使用一个NetworkStats.Bucket，请使用hasNextBucket()也可以获得以下桶。

因此将方法的底部更改为:

long tx = 0L
NetworkStats.Bucket bucket = new NetworkStats.Bucket();
while (networkStats.hasNextBucket()) {
    networkStats.getNextBucket(bucket);
    tx += bucket.getTxBytes();
    Log.d("tag1","StartTime: "+bucket.getStartTimeStamp());
    Log.d("tag1","EndTime: "+bucket.getEndTimeStamp());
}

networkStats.close();
return tx;