Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void androidx.viewpager2.widget.ViewPager2.unregisterOnPageChangeCallback(androidx.viewpager2.widget.ViewPager2$OnPageChangeCallback)' on a null object reference
at com.youth.banner.Banner.destroy(Banner.java:582)
at com.youth.banner.Banner.onDestroy(Banner.java:878)
at com.youth.banner.util.BannerLifecycleObserverAdapter.onDestroy(BannerLifecycleObserverAdapter.java:32)
at java.lang.reflect.Method.invoke(Native Method)
at androidx.lifecycle.ClassesInfoCache$MethodReference.invokeCallback(ClassesInfoCache.java:222)
... 32 more
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void androidx.viewpager2.widget.ViewPager2.unregisterOnPageChangeCallback(androidx.viewpager2.widget.ViewPager2$OnPageChangeCallback)' on a null object reference at com.youth.banner.Banner.destroy(Banner.java:582) at com.youth.banner.Banner.onDestroy(Banner.java:878) at com.youth.banner.util.BannerLifecycleObserverAdapter.onDestroy(BannerLifecycleObserverAdapter.java:32) at java.lang.reflect.Method.invoke(Native Method) at androidx.lifecycle.ClassesInfoCache$MethodReference.invokeCallback(ClassesInfoCache.java:222) ... 32 more
父布局为Fragment