java.lang.NullPointerException

Stack Overflow | Aliya | 3 months ago
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  2. 0

    NullPointerException on setMenuVisibility

    Stack Overflow | 8 months ago | MAOL
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v4.app.Fragment.setMenuVisibility(boolean)' on a null object reference
  3. 0

    Fatal Exception: java.lang.NullPointerException while using ViewPager

    Stack Overflow | 8 months ago | user669231
    java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Handler android.support.v4.app.FragmentHostCallback.getHandler()' on a null object reference
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Root Cause Analysis

  1. java.lang.NullPointerException

    No message provided

    at android.support.v4.app.FragmentPagerAdapter.instantiateItem()
  2. Android Support v4
    ViewPager.onMeasure
    1. android.support.v4.app.FragmentPagerAdapter.instantiateItem(FragmentPagerAdapter.java:89)
    2. android.support.v4.view.ViewPager.addNewItem(ViewPager.java:1006)
    3. android.support.v4.view.ViewPager.populate(ViewPager.java:1154)
    4. android.support.v4.view.ViewPager.populate(ViewPager.java:1088)
    5. android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1614)
    5 frames
  3. Android Platform
    ViewGroup.measureChildWithMargins
    1. android.view.View.measure(View.java:15848)
    2. android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5012)
    2 frames
  4. android.support.design
    CoordinatorLayout.onMeasure
    1. android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:700)
    2. android.support.design.widget.HeaderScrollingViewBehavior.onMeasureChild(HeaderScrollingViewBehavior.java:90)
    3. android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onMeasureChild(AppBarLayout.java:1364)
    4. android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:765)
    4 frames
  5. Android Platform
    ViewGroup.measureChildWithMargins
    1. android.view.View.measure(View.java:15848)
    2. android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5012)
    3. android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
    4. android.view.View.measure(View.java:15848)
    5. android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5012)
    5 frames
  6. android.support.design
    CoordinatorLayout.onMeasure
    1. android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:700)
    2. android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:767)
    2 frames
  7. Android Platform
    View.measure
    1. android.view.View.measure(View.java:15848)
    1 frame
  8. Android Support v4
    DrawerLayout.onMeasure
    1. android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1085)
    1 frame
  9. Android Platform
    FrameLayout.onMeasure
    1. android.view.View.measure(View.java:15848)
    2. android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5012)
    3. android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
    3 frames
  10. Android v7
    ContentFrameLayout.onMeasure
    1. android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
    1 frame
  11. Android Platform
    FrameLayout.onMeasure
    1. android.view.View.measure(View.java:15848)
    2. android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5012)
    3. android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
    4. android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
    5. android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
    6. android.view.View.measure(View.java:15848)
    7. android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5012)
    8. android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
    9. android.view.View.measure(View.java:15848)
    10. android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5012)
    11. android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
    12. android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
    13. android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
    14. android.view.View.measure(View.java:15848)
    15. android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5012)
    16. android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
    16 frames
  12. Android
    PhoneWindow$DecorView.onMeasure
    1. com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2189)
    1 frame
  13. Android Platform
    ActivityThread.main
    1. android.view.View.measure(View.java:15848)
    2. android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1905)
    3. android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1104)
    4. android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1284)
    5. android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004)
    6. android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5481)
    7. android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
    8. android.view.Choreographer.doCallbacks(Choreographer.java:562)
    9. android.view.Choreographer.doFrame(Choreographer.java:532)
    10. android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
    11. android.os.Handler.handleCallback(Handler.java:730)
    12. android.os.Handler.dispatchMessage(Handler.java:92)
    13. android.os.Looper.loop(Looper.java:137)
    14. android.app.ActivityThread.main(ActivityThread.java:5103)
    14 frames
  14. Java RT
    Method.invoke
    1. java.lang.reflect.Method.invokeNative(Native Method)
    2. java.lang.reflect.Method.invoke(Method.java:525)
    2 frames
  15. Android
    ZygoteInit$MethodAndArgsCaller.run
    1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
    1 frame