java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference

GitHub | Mohit-Soni | 10 months ago
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  1. 0

    GitHub comment 35#229653862

    GitHub | 10 months ago | Mohit-Soni
    java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference
  2. 0

    Why don't you just return the Date instead of hh,mm and selected date etc

    GitHub | 4 months ago | srgiitd
    java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference
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  4. 0

    java.lang.NullPointerException in Wifi enabling code

    Stack Overflow | 3 years ago | user59053
    java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.content.Context.getSystemService(java.lang.String)' on a null object reference 01-01 22:53:40.994: W/System.err(13438): at com.wifiTest.TurnOnWIfiTestAction.turnOnWifi(TurnOnWIfiTestAction.java:18) 01-01 22:53:40.994: W/System.err(13438): at com.post.l_upgrade.MainActivity.wifienable(MainActivity.java:46) 01-01 22:53:40.994: W/System.err(13438): at java.lang.reflect.Method.invoke(Native Method) 01-01 22:53:40.994: W/System.err(13438): at java.lang.reflect.Method.invoke(Method.java:372) 01-01 22:53:40.994: W/System.err(13438): at android.view.View$1.onClick(View.java:3986) 01-01 22:53:41.000: W/System.err(13438): at android.view.View.performClick(View.java:4728) 01-01 22:53:41.000: W/System.err(13438): at android.view.View$PerformClick.run(View.java:19508) 01-01 22:53:41.000: W/System.err(13438): at android.os.Handler.handleCallback(Handler.java:739) 01-01 22:53:41.002: W/System.err(13438): at android.os.Handler.dispatchMessage(Handler.java:95) 01-01 22:53:41.002: W/System.err(13438): at android.os.Looper.loop(Looper.java:135)
  5. 0

    Android Crashing when using a FragmentPagerAdapter

    Stack Overflow | 8 months ago | tom-james
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.media.MediaPlayer.pause()' on a null object reference at ...ColorsFragment$1.onAudioFocusChange(ColorsFragment.java:26) at ...AudioManager$FocusEventHandlerDelegate$1.handleMessage(AudioManager.java:2147) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148)

    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference

      at com.appeaser.sublimepickerlibrary.datepicker.DayPickerView.onLayout()
    2. com.appeaser.sublimepickerlibrary
      DayPickerView.onLayout
      1. com.appeaser.sublimepickerlibrary.datepicker.DayPickerView.onLayout(DayPickerView.java:280)
      1 frame
    3. Android Platform
      ViewGroup.layout
      1. android.view.View.layout(View.java:16646)
      2. android.view.ViewGroup.layout(ViewGroup.java:5440)
      3. android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
      4. android.widget.FrameLayout.onLayout(FrameLayout.java:273)
      5. android.view.View.layout(View.java:16646)
      6. android.view.ViewGroup.layout(ViewGroup.java:5440)
      7. android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
      8. android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
      9. android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
      10. android.view.View.layout(View.java:16646)
      11. android.view.ViewGroup.layout(ViewGroup.java:5440)
      12. android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
      13. android.widget.FrameLayout.onLayout(FrameLayout.java:273)
      14. android.view.View.layout(View.java:16646)
      15. android.view.ViewGroup.layout(ViewGroup.java:5440)
      16. android.widget.RelativeLayout.onLayout(RelativeLayout.java:1079)
      17. android.view.View.layout(View.java:16646)
      18. android.view.ViewGroup.layout(ViewGroup.java:5440)
      18 frames
    4. android.support.design
      CoordinatorLayout.onLayout
      1. android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:122)
      2. android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42)
      3. android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1192)
      4. android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:814)
      4 frames
    5. Android Platform
      FrameLayout.onLayout
      1. android.view.View.layout(View.java:16646)
      2. android.view.ViewGroup.layout(ViewGroup.java:5440)
      3. android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
      4. android.widget.FrameLayout.onLayout(FrameLayout.java:273)
      5. android.view.View.layout(View.java:16646)
      6. android.view.ViewGroup.layout(ViewGroup.java:5440)
      7. android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
      8. android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
      9. android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
      10. android.view.View.layout(View.java:16646)
      11. android.view.ViewGroup.layout(ViewGroup.java:5440)
      12. android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
      13. android.widget.FrameLayout.onLayout(FrameLayout.java:273)
      14. android.view.View.layout(View.java:16646)
      15. android.view.ViewGroup.layout(ViewGroup.java:5440)
      16. android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
      17. android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
      18. android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
      19. android.view.View.layout(View.java:16646)
      20. android.view.ViewGroup.layout(ViewGroup.java:5440)
      21. android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
      22. android.widget.FrameLayout.onLayout(FrameLayout.java:273)
      22 frames
    6. Android
      PhoneWindow$DecorView.onLayout
      1. com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:2678)
      1 frame
    7. Android Platform
      ActivityThread.main
      1. android.view.View.layout(View.java:16646)
      2. android.view.ViewGroup.layout(ViewGroup.java:5440)
      3. android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2183)
      4. android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1943)
      5. android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1119)
      6. android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6060)
      7. android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
      8. android.view.Choreographer.doCallbacks(Choreographer.java:670)
      9. android.view.Choreographer.doFrame(Choreographer.java:606)
      10. android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
      11. android.os.Handler.handleCallback(Handler.java:746)
      12. android.os.Handler.dispatchMessage(Handler.java:95)
      13. android.os.Looper.loop(Looper.java:148)
      14. android.app.ActivityThread.main(ActivityThread.java:5443)
      14 frames