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

Stack Overflow | michalsol | 5 months ago
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    Stack Overflow | 5 months ago | michalsol
    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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    Stack Overflow | 5 months ago | Asmi
    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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    Initialize the variable before calling a method on it.
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    Android compiles but crashes

    Stack Overflow | 2 years ago | AndroidNoob
    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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    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.android.internal.app.AlertController.setupView()
    2. Android
      AlertController.installContent
      1. com.android.internal.app.AlertController.setupView(AlertController.java:472)
      2. com.android.internal.app.AlertController.installContent(AlertController.java:237)
      2 frames
    3. Android Platform
      ActivityThread.main
      1. android.app.AlertDialog.onCreate(AlertDialog.java:423)
      2. android.app.Dialog.dispatchOnCreate(Dialog.java:389)
      3. android.app.Dialog.show(Dialog.java:293)
      4. android.preference.DialogPreference.showDialog(DialogPreference.java:319)
      5. android.preference.DialogPreference.onClick(DialogPreference.java:277)
      6. android.preference.Preference.performClick(Preference.java:994)
      7. android.preference.PreferenceScreen.onItemClick(PreferenceScreen.java:214)
      8. android.widget.AdapterView.performItemClick(AdapterView.java:310)
      9. android.widget.AbsListView.performItemClick(AbsListView.java:1155)
      10. android.widget.AbsListView$PerformClick.run(AbsListView.java:3126)
      11. android.widget.AbsListView$3.run(AbsListView.java:4041)
      12. android.os.Handler.handleCallback(Handler.java:751)
      13. android.os.Handler.dispatchMessage(Handler.java:95)
      14. android.os.Looper.loop(Looper.java:154)
      15. android.app.ActivityThread.main(ActivityThread.java:6077)
      15 frames
    4. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      1 frame
    5. Android
      ZygoteInit.main
      1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
      2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
      2 frames