Exception java.lang.NullPointerException: Attempt to read from field 'int android.view.View.mViewFlags' on a null object reference

[ali-imran]

Exception java.lang.NullPointerException: Attempt to read from field 'int android.view.View.mViewFlags' on a null object reference at android.view.ViewGroup.dispatchDraw (ViewGroup.java:4082) at android.view.View.draw (View.java:19323) at android.view.View.buildDrawingCacheImpl (View.java:18540) at android.view.View.buildDrawingCache (View.java:18396) at android.view.View.draw (View.java:19022) at android.view.ViewGroup.drawChild (ViewGroup.java:4297) at android.view.ViewGroup.dispatchDraw (ViewGroup.java:4083) at android.view.View.draw (View.java:19323) at androidx.viewpager.widget.ViewPager.draw (ViewPager.java:2426) at android.view.View.draw (View.java:19179) at android.view.ViewGroup.drawChild (ViewGroup.java:4297) at android.view.ViewGroup.dispatchDraw (ViewGroup.java:4083) at android.view.View.draw (View.java:19177) at android.view.ViewGroup.drawChild (ViewGroup.java:4297) at android.view.ViewGroup.dispatchDraw (ViewGroup.java:4083) at android.view.View.draw (View.java:19177) at android.view.ViewGroup.drawChild (ViewGroup.java:4297) at android.view.ViewGroup.dispatchDraw (ViewGroup.java:4083) at android.view.View.draw (View.java:19177) at android.view.ViewGroup.drawChild (ViewGroup.java:4297) at android.view.ViewGroup.dispatchDraw (ViewGroup.java:4083) at android.view.View.draw (View.java:19177) at android.view.ViewGroup.drawChild (ViewGroup.java:4297) at android.view.ViewGroup.dispatchDraw (ViewGroup.java:4083) at android.view.View.draw (View.java:19177) at android.view.ViewGroup.drawChild (ViewGroup.java:4297) at android.view.ViewGroup.dispatchDraw (ViewGroup.java:4083) at android.view.View.draw (View.java:19177) at android.view.ViewGroup.drawChild (ViewGroup.java:4297) at android.view.ViewGroup.dispatchDraw (ViewGroup.java:4083) at android.view.View.draw (View.java:19323) at com.android.internal.policy.DecorView.draw (DecorView.java:789) at com.github.mmin18.widget.RealtimeBlurView$1.onPreDraw (RealtimeBlurView.java:265) at android.view.ViewTreeObserver.dispatchOnPreDraw (ViewTreeObserver.java:977) at android.view.ViewRootImpl.performTraversals (ViewRootImpl.java:2446) at android.view.ViewRootImpl.doTraversal (ViewRootImpl.java:1438) at android.view.ViewRootImpl$TraversalRunnable.run (ViewRootImpl.java:6982) at android.view.Choreographer$CallbackRecord.run (Choreographer.java:913) at android.view.Choreographer.doCallbacks (Choreographer.java:725) at android.view.Choreographer.doFrame (Choreographer.java:660) at android.view.Choreographer$FrameDisplayEventReceiver.run (Choreographer.java:899) at android.os.Handler.handleCallback (Handler.java:790) at android.os.Handler.dispatchMessage (Handler.java:99) at android.os.Looper.loop (Looper.java:164) at android.app.ActivityThread.main (ActivityThread.java:6548) at java.lang.reflect.Method.invoke (Method.java) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:438) at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:857)