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POAndroid TrafficStats.getTotalRxBytes() is less than expected
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  1. POAndroid TrafficStats.getTotalRxBytes() is less than expected
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    copied!<p>I'm trying to get а real traffic stats data. But, TrafficStats.getTotalRxBytes() is less than a sum of TrafficStats.getUidRxBytes() for each installed application. I've found it out by running each 30 seconds this code (being on a Wi-Fi network):</p> <pre><code>long total = TrafficStats.getTotalRxBytes(); long mobileTotal = TrafficStats.getMobileRxBytes(); long wifiTotal = (total - mobileTotal); Log.v("SSS", "total=" + total + " mob=" + mobileTotal + " wifi=" + wifiTotal); ArrayList&lt;Integer&gt; uids = new ArrayList&lt;Integer&gt;(); int cnt = 0; for (ApplicationInfo appInfo : packageManager.getInstalledApplications(0)) { long bytes = TrafficStats.getUidRxBytes(appInfo.uid); if (!uids.contains(appInfo.uid)) { // few applications can refer to same uid - sum each uid stats only once uids.add(appInfo.uid); if (bytes &gt; 0) cnt += bytes; } } Log.v("SSS", "sum traffic stats = " + cnt); </code></pre> <p>And this is in logs:</p> <pre><code>12-12 19:43:18.798: V/SSS(4772): total=4245863 mob=0 wifi=4245863 12-12 19:43:19.569: V/SSS(4772): sum traffic stats = 9313461 12-12 19:43:49.628: V/SSS(4772): total=4245915 mob=0 wifi=4245915 12-12 19:43:50.459: V/SSS(4772): sum traffic stats = 9314216 12-12 19:44:20.518: V/SSS(4772): total=4246524 mob=0 wifi=4246524 12-12 19:44:21.439: V/SSS(4772): sum traffic stats = 9320030 </code></pre> <p>The difference between totals is less than difference between sums : </p> <pre><code>9320030 - 9314216 = 5814 bytes // sums of traffic stats by uid 4246524 - 4245915 = 609 bytes // total traffic stats </code></pre> <p>1) Why is that? 2) How do i get a correct value for total traffic stats - should i just sum traffic stats by uids?</p>
 

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