java.lang.NullPointerException

Stack Overflow | sayres kabir | 2 months ago
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    samebug tip
    When you use findViewById inside an activity it is going to look for a View inside your main_activity.xml. If it's not there, it throws this exception, try to use the right view to call findviewById.
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    samebug tip
    This issue was solved in 2.2.6. If updating doesn't solve, try using notifyItemRangeChanged(1, mDatas.size()) instead of notifyItemRangeChanged(0, mDatas.size()).
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    samebug tip
    You have to provide valid identical number for each child items.
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    ActionBar title not changing

    Stack Overflow | 4 years ago | user2343207
    java.lang.NullPointerException
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Root Cause Analysis

  1. java.lang.NullPointerException

    No message provided

    at android.widget.Toast.<init>()
  2. Android Platform
    Toast.makeText
    1. android.widget.Toast.<init>(Toast.java:93)
    2. android.widget.Toast.makeText(Toast.java:241)
    2 frames
  3. com.example.sayres
    ProfileActivity$1.onPageSelected
    1. com.example.sayres.myapplication7.mvp.view.profile.ProfileFragment.onResumeFragment(ProfileFragment.java:117)
    2. com.example.sayres.myapplication7.mvp.view.profile.ProfileActivity$1.onPageSelected(ProfileActivity.java:56)
    2 frames
  4. Android Support v4
    ViewPager.onTouchEvent
    1. android.support.v4.view.ViewPager.dispatchOnPageSelected(ViewPager.java:1862)
    2. android.support.v4.view.ViewPager.scrollToItem(ViewPager.java:625)
    3. android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:609)
    4. android.support.v4.view.ViewPager.onTouchEvent(ViewPager.java:2176)
    4 frames
  5. Android Platform
    ViewGroup.dispatchTouchEvent
    1. android.view.View.dispatchTouchEvent(View.java:7706)
    2. android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2210)
    3. android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1945)
    4. android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2216)
    5. android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1959)
    6. android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2216)
    7. android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1959)
    8. android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2216)
    9. android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1959)
    10. android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2216)
    11. android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1959)
    11 frames
  6. Android
    PhoneWindow.superDispatchTouchEvent
    1. com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2068)
    2. com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1515)
    2 frames
  7. Android Platform
    Activity.dispatchTouchEvent
    1. android.app.Activity.dispatchTouchEvent(Activity.java:2458)
    1 frame
  8. Android
    PhoneWindow$DecorView.dispatchTouchEvent
    1. com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2016)
    1 frame
  9. Android Platform
    ActivityThread.main
    1. android.view.View.dispatchPointerEvent(View.java:7886)
    2. android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:3947)
    3. android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3826)
    4. android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3392)
    5. android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3442)
    6. android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3411)
    7. android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3518)
    8. android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3419)
    9. android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3575)
    10. android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3392)
    11. android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3442)
    12. android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3411)
    13. android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3419)
    14. android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3392)
    15. android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5532)
    16. android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5512)
    17. android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5483)
    18. android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:5612)
    19. android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
    20. android.os.MessageQueue.nativePollOnce(Native Method)
    21. android.os.MessageQueue.next(MessageQueue.java:138)
    22. android.os.Looper.loop(Looper.java:123)
    23. android.app.ActivityThread.main(ActivityThread.java:5001)
    23 frames
  10. Java RT
    Method.invoke
    1. java.lang.reflect.Method.invokeNative(Native Method)
    2. java.lang.reflect.Method.invoke(Method.java:515)
    2 frames
  11. Android
    ZygoteInit.main
    1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
    2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
    2 frames
  12. Android Platform
    NativeStart.main
    1. dalvik.system.NativeStart.main(Native Method)
    1 frame