kotlin.TypeCastException: null cannot be cast to non-null type

[Aym9n]

E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.seremtinameno.datamanager, PID: 27109 kotlin.TypeCastException: null cannot be cast to non-null type android.app.usage.NetworkStatsManager at com.example.seremtinameno.datamanager.features.datausage.DataRepository$Data.obtainMonthlyData(DataRepository.kt:36) at com.example.seremtinameno.datamanager.features.datausage.DataRepository$Data.getData(DataRepository.kt:28) at com.example.seremtinameno.datamanager.features.datausage.GetDataUsage.run(GetDataUsage.kt:13) at com.example.seremtinameno.datamanager.features.datausage.GetDataUsage.run(GetDataUsage.kt:8) at com.example.seremtinameno.datamanager.core.interactor.UseCase$invoke$job$1.doResume(UseCase.kt:23) at kotlin.coroutines.experimental.jvm.internal.CoroutineImpl.resume(CoroutineImpl.kt:42) at kotlinx.coroutines.experimental.DispatchedTask$DefaultImpls.run(Dispatched.kt:161) at kotlinx.coroutines.experimental.DispatchedContinuation.run(Dispatched.kt:25) at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1392) at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:257) at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:852) at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1681) at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1636) at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:108)

[theBlackDre1D]

Can you write here which phone (model name) you used and version of Android?
How many times did error occur?

[Aym9n]

The error always occur, tested on Lollipop Android studio 3.2.1

[theBlackDre1D]

Thank you for respond! This app works only on Android 6 an higher.
This app uses an internal Android database where is information about network usage and this is only in Android 6.0 and higher.