I'm using querySummary() method of NetworkStatsManager to calculate the data usage,it gives me proper usage but sometimes it throws NullPointerException for this method.
Error in UsageTestService:
java.lang.NullPointerException:
at android.os.Parcel.readException (Parcel.java:1626)
at android.os.Parcel.readException (Parcel.java:1573)
at android.net.INetworkStatsSession$Stub$Proxy.getSummaryForAllUid
(INetworkStatsSession.java:355)
at android.app.usage.NetworkStats.startSummaryEnumeration
(NetworkStats.java:330)
at android.app.usage.NetworkStatsManager.querySummary
(NetworkStatsManager.java:166)
at com.test.services.UsageTestService$1.run (UsageTestService.java:172)
My code :
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
NetworkStats networkStats = null;
try {
networkStatsManager = (NetworkStatsManager) getApplicationContext().getSystemService(Context.NETWORK_STATS_SERVICE);
networkStats = networkStatsManager.querySummary(0, getSubscriberId(UsageTestService.this, ConnectivityManager.TYPE_MOBILE), 0, System.currentTimeMillis());
} catch (RemoteException e) {
e.printStackTrace();
}
if(networkStats!=null)
{
while (networkStats.hasNextBucket()) {
NetworkStats.Bucket bucket = new NetworkStats.Bucket();
networkStats.getNextBucket(bucket);
int uid = bucket.getUid();
double rx1 = bucket.getRxBytes();
double tx1 = bucket.getTxBytes();
int state1 = bucket.getState();
double totalRxTx1 = rx1+ tx1;
}
}
}
What will be the issue?
We stumbled to the same issue and it seems to be a platform bug. At the moment, still unfixed in master branch.
This is an excerpt from the current plaform code:
@Override
public NetworkStats getSummaryForAllUid(
NetworkTemplate template, long start, long end, boolean includeTags) {
try {
@NetworkStatsAccess.Level int accessLevel = checkAccessLevel(mCallingPackage);
final NetworkStats stats =
getUidComplete().getSummary(template, start, end, accessLevel);
if (includeTags) {
final NetworkStats tagStats = getUidTagComplete()
.getSummary(template, start, end, accessLevel);
stats.combineAllValues(tagStats);
}
return stats;
} catch (NullPointerException e) {
// TODO: Track down and fix the cause of this crash and remove this catch block.
Slog.wtf(TAG, "NullPointerException in getSummaryForAllUid", e);
throw e;
}
}