java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v4.app.FragmentManagerImpl.performPendingDeferredStart(android.support.v4.app.Fragment)' on a null object reference

Stack Overflow | Miki P | 4 months ago
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    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v4.app.FragmentManagerImpl.performPendingDeferredStart(android.support.v4.app.Fragment)' on a null object reference
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    java.lang.NullPointerException
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    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v4.app.FragmentManagerImpl.performPendingDeferredStart(android.support.v4.app.Fragment)' on a null object reference
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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'void android.support.v4.app.FragmentManagerImpl.performPendingDeferredStart(android.support.v4.app.Fragment)' on a null object reference

      at android.support.v4.app.Fragment.setUserVisibleHint()
    2. Android Support v4
      ViewPager.onTouchEvent
      1. android.support.v4.app.Fragment.setUserVisibleHint(Fragment.java:879)
      2. android.support.v4.app.FragmentStatePagerAdapter.setPrimaryItem(FragmentStatePagerAdapter.java:152)
      3. android.support.v4.view.ViewPager.populate(ViewPager.java:1104)
      4. android.support.v4.view.ViewPager.populate(ViewPager.java:952)
      5. android.support.v4.view.ViewPager.onTouchEvent(ViewPager.java:2037)
      5 frames
    3. Android Platform
      ViewGroup.dispatchTouchEvent
      1. android.view.View.dispatchTouchEvent(View.java:9300)
      2. android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2547)
      3. android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2240)
      4. android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2553)
      5. android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2197)
      6. android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2553)
      7. android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2197)
      8. android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2553)
      9. android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2197)
      10. android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2553)
      11. android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2197)
      12. android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2553)
      13. android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2197)
      13 frames
    4. Android
      PhoneWindow.superDispatchTouchEvent
      1. com.android.internal.policy.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2403)
      2. com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1737)
      2 frames
    5. Android Platform
      Activity.dispatchTouchEvent
      1. android.app.Activity.dispatchTouchEvent(Activity.java:2771)
      1 frame
    6. Android
      PhoneWindow$DecorView.dispatchTouchEvent
      1. com.android.internal.policy.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2364)
      1 frame
    7. Android Platform
      ActivityThread.main
      1. android.view.View.dispatchPointerEvent(View.java:9520)
      2. android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4238)
      3. android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4104)
      4. android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3650)
      5. android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3703)
      6. android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3669)
      7. android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3795)
      8. android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3677)
      9. android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3852)
      10. android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3650)
      11. android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3703)
      12. android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3669)
      13. android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3677)
      14. android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3650)
      15. android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5932)
      16. android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5906)
      17. android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5867)
      18. android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6035)
      19. android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
      20. android.os.MessageQueue.nativePollOnce(Native Method)
      21. android.os.MessageQueue.next(MessageQueue.java:323)
      22. android.os.Looper.loop(Looper.java:135)
      23. android.app.ActivityThread.main(ActivityThread.java:5422)
      23 frames
    8. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      1 frame
    9. Android
      ZygoteInit.main
      1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
      2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
      2 frames