ClassNotFoundException: Didn't find class "com.google.android.gms.measurement.AppMeasurement" on pat

[Danish Farooqui]

Activity getting crashed with this error even though i am not using firebase. Ad is showing app is running good until i use my  activity in which i implemented viewpager.

 W/Ads: Invoke Firebase method getInstance error.

                                                                                             java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.measurement.AppMeasurement" on path: DexPathList[[zip file "/data/app/com.kidsbox.android.abcforkidsalphabetshapesandnumbers-2/base.apk"],nativeLibraryDirectories=[/data/app/com.kidsbox.android.abcforkidsalphabetshapesandnumbers-2/lib/arm, /vendor/lib, /system/lib]]

                                                                                                 at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)

                                                                                                 at java.lang.ClassLoader.loadClass(ClassLoader.java:511)

                                                                                                 at java.lang.ClassLoader.loadClass(ClassLoader.java:469)

                                                                                                 at com.google.android.gms.ads.internal.scionintegration.b.a(:com.google.android.gms.DynamiteModulesA:167)

                                                                                                 at com.google.android.gms.ads.internal.scionintegration.b.a(:com.google.android.gms.DynamiteModulesA:152)

                                                                                                 at com.google.android.gms.ads.internal.scionintegration.b.g(:com.google.android.gms.DynamiteModulesA:43)

                                                                                                 at com.google.android.gms.ads.internal.request.c.a(:com.google.android.gms.DynamiteModulesA:26)

                                                                                                 at com.google.android.gms.ads.internal.util.b.run(:com.google.android.gms.DynamiteModulesA:4)

                                                                                                 at com.google.android.gms.ads.internal.util.af.call(:com.google.android.gms.DynamiteModulesA:3)

                                                                                                 at com.google.android.gms.ads.internal.util.ag.run(:com.google.android.gms.DynamiteModulesA:3)

                                                                                                 at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)

                                                                                                 at java.util.concurrent.FutureTask.run(FutureTask.java:237)

                                                                                                 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)

                                                                                                 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)

                                                                                                 at java.lang.Thread.run(Thread.java:818)

                                                                                              Suppressed: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.measurement.AppMeasurement" on path: DexPathList[[dex file "/data/data/com.kidsbox.android.abcforkidsalphabetshapesandnumbers/files/instant-run/dex/slice-support-annotations-25.3.1_1c639d911dc03f01c3b4d67fafdcfc2598dbf173-classes.dex", dex file "/data/data/com.kidsbox.android.abcforkidsalphabetshapesandnumbers/files/instant-run/dex/slice-slice_9-classes.dex", dex file "/data/data/com.kidsbox.android.abcforkidsalphabetshapesandnumbers/files/instant-run/dex/slice-slice_8-classes.dex", dex file "/data/data/com.kidsbox.android.abcforkidsalphabetshapesandnumbers/files/instant-run/dex/slice-slice_7-classes.dex", dex file "/data/data/com.kidsbox.android.abcforkidsalphabetshapesandnumbers/files/instant-run/dex/slice-slice_6-classes.dex", dex file "/data/data/com.kidsbox.android.abcforkidsalphabetshapesandnumbers/files/instant-run/dex/slice-slice_5-classes.dex", dex file "/data/data/com.kidsbox.android.abcforkidsalphabetshapesandnumbers/files/instant-run/dex/slice-slice_4-classes.dex", dex file "/data/data/com.kidsbox.android.abcforkidsalphabetshapesandnumbers/files/instant-run/dex/slice-slice_3-classes.dex", dex file "/data/data/com.kidsbox.android.abcforkidsalphabetshapesandnumbers/files/instant-run/dex/slice-slice_2-classes.dex", dex file "/data/data/com.kidsbox.android.abcforkidsalphabetshapesandnumbers/files/instant-run/dex/slice-slice_1-classes.dex", dex file "/data/data/com.kidsbox.android.abcforkidsalphabetshapesandnumbers/files/instant-run/dex/slice-slice_0-classes.dex", dex file "/data/data/com.kidsbox.android.abcforkidsalphabetshapesandnumbers/files/instant-run/dex/slice-com.google.android.gms-play-services-tasks-11.0.4_48df7a1d5b02a57d52996686373a91efaccb023c-classes.dex", dex file "/data/data/com.kidsbox.android.abcforkidsalphabetshapesandnumbers/files/instant-run/dex/slice-com.google.android.gms-play-services-safetynet-11.0.4_9cddd51148dee7451a3c0e213647853b5746247b-classes.dex", dex file "/data/data/com.kidsbox.android.abcforkidsalphabetshapesandnumbers/files/instant-run/dex/slice-com.google.android.gms-play-services-gass-11.0.4_8ece422959311fc53809b0d43fedc899870df4c9-classes.dex", dex file "/data/data/com.kidsbox.android.abcforkidsalphabetshapesandnumbers/files/instant-run/dex/slice-com.google.android.gms-play-services-clearcut-11.0.4_a960476bd63d0604934a97c3a70e39fa3e6af052-classes.dex", dex file "/data

08-14 15:26:37.804 10500-10553/com.kidsbox.android.abcforkidsalphabetshapesandnumbers W/Ads: The Google Mobile Ads SDK will not integrate with Firebase. Admob/Firbase integration requires the latest Firebase SDK jar, but Firebase SDK is either missing or out of date