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I received the below crash when closing a fragment containing the BoxCastVideoView.

Steps to reproduce:

1. Opened the app
2. Went to the fragment containing the view
3. Because we are not currently live, the view was never started
4. Navigated away from the fragment
5. Crash

It looks like onDetatchedFromWindow() is assuming the view was started and a timer is present. Perhaps a null check might clear this up?

java.lang.NullPointerException: Attempt to invoke virtual method 'void java.util.Timer.cancel()' on a null object reference at com.boxcast.android.view.BoxCastVideoView.cancelIntervalTimer(BoxCastVideoView.java:174) at com.boxcast.android.view.BoxCastVideoView.onDetachedFromWindow(BoxCastVideoView.java:128) at android.view.View.dispatchDetachedFromWindow(View.java:18400) at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:3769) at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:3769) at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:3769) at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:3769) at android.view.ViewGroup.removeViewInternal(ViewGroup.java:5359) at android.view.ViewGroup.removeViewInternal(ViewGroup.java:5330) at android.view.ViewGroup.removeView(ViewGroup.java:5261) at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:973) at androidx.fragment.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManagerImpl.java:1238) at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:434) at androidx.fragment.app.FragmentManagerImpl.executeOps(FragmentManagerImpl.java:2079) at androidx.fragment.app.FragmentManagerImpl.executeOpsTogether(FragmentManagerImpl.java:1869) at androidx.fragment.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManagerImpl.java:1824) at androidx.fragment.app.FragmentManagerImpl.execPendingActions(FragmentManagerImpl.java:1727) at androidx.fragment.app.FragmentManagerImpl$2.run(FragmentManagerImpl.java:150) at android.os.Handler.handleCallback(Handler.java:873) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6669) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)