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

GitHub | tux-world | 4 months ago
  1. 0

    foldablelayout cause of crash my application when i try to close inside EventBus

    GitHub | 4 months ago | tux-world
    java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.ViewGroup.indexOfChild(android.view.View)' on a null object
  2. 0

    Android error Attempt to invoke virtual method on a null object reference [duplicate]

    rishitnandan.com | 1 year ago
    java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.projects.example.myapp/com.projects.example.myapp.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.Window.findViewById(int)' on a null object reference
  3. 0

    Pikachuu |

    tryjust.com | 1 year ago
    java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.widget.RelativeLayout.findViewById(int)' on a null object reference
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  5. 0

    Buttons in mapsforge

    Google Groups | 2 months ago | Medyn
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.lifemakers.mapsforge/com.example.lifemakers.mapsforge.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.RelativeLayout.addView(android.view.View, int)' on a null object reference
  6. 0

    RuntimeException: Unabel to instantiate activity ComponentInfo and NullPointerException

    Stack Overflow | 1 year ago | Adam
    java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.user.testapp/com.example.user.testapp.RevGPAActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.Window.findViewById(int)' on a null object reference

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    Root Cause Analysis

    1. java.lang.NullPointerException

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

      at com.alexvasilkov.foldablelayout.UnfoldableView.switchViews()
    2. com.alexvasilkov.foldablelayout
      FoldableListLayout.setFoldRotation
      1. com.alexvasilkov.foldablelayout.UnfoldableView.switchViews(UnfoldableView.java:384)
      2. com.alexvasilkov.foldablelayout.UnfoldableView.clearCoverViewInternal(UnfoldableView.java:368)
      3. com.alexvasilkov.foldablelayout.UnfoldableView.onFoldedBack(UnfoldableView.java:150)
      4. com.alexvasilkov.foldablelayout.UnfoldableView.setState(UnfoldableView.java:186)
      5. com.alexvasilkov.foldablelayout.UnfoldableView.setFoldRotation(UnfoldableView.java:254)
      6. com.alexvasilkov.foldablelayout.FoldableListLayout.setFoldRotation(FoldableListLayout.java:251)
      6 frames
    3. Android Platform
      ActivityThread.main
      1. android.animation.PropertyValuesHolder.nCallFloatMethod(Native Method)
      2. android.animation.PropertyValuesHolder.access$400(PropertyValuesHolder.java:37)
      3. android.animation.PropertyValuesHolder$FloatPropertyValuesHolder.setAnimatedValue(PropertyValuesHolder.java:1296)
      4. android.animation.ObjectAnimator.animateValue(ObjectAnimator.java:981)
      5. android.animation.ValueAnimator.animationFrame(ValueAnimator.java:1384)
      6. android.animation.ValueAnimator.doAnimationFrame(ValueAnimator.java:1427)
      7. android.animation.ValueAnimator$AnimationHandler.doAnimationFrame(ValueAnimator.java:759)
      8. android.animation.ValueAnimator$AnimationHandler$1.run(ValueAnimator.java:801)
      9. android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
      10. android.view.Choreographer.doCallbacks(Choreographer.java:670)
      11. android.view.Choreographer.doFrame(Choreographer.java:603)
      12. android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
      13. android.os.Handler.handleCallback(Handler.java:739)
      14. android.os.Handler.dispatchMessage(Handler.java:95)
      15. android.os.Looper.loop(Looper.java:234)
      16. android.app.ActivityThread.main(ActivityThread.java:5526)
      16 frames
    4. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      1 frame
    5. Android
      ZygoteInit.main
      1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
      2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
      2 frames