java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ListView.setAdapter(android.widget.ListAdapter)' on a null object reference

Stack Overflow | Jona A. | 2 months ago
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  1. 0

    NullpointerException on null object reference

    Stack Overflow | 2 months ago | Jona A.
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ListView.setAdapter(android.widget.ListAdapter)' on a null object reference
  2. 0

    Android shared preferences error while accessing data without internet

    Stack Overflow | 7 months ago | kunal nikam
    java.lang.NullPointerException: Attempt to read from field 'android.content.SharedPreferences com.example.mahadev.listview2.MySharedPrefLib.sharedpreferences' on a null object reference
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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'void android.widget.ListView.setAdapter(android.widget.ListAdapter)' on a null object reference

      at com.example.roland.libraryapp.MainActivity.showJSON()
    2. com.example.roland
      MainActivity$2.onResponse
      1. com.example.roland.libraryapp.MainActivity.showJSON(MainActivity.java:92)
      2. com.example.roland.libraryapp.MainActivity.access$000(MainActivity.java:30)
      3. com.example.roland.libraryapp.MainActivity$2.onResponse(MainActivity.java:74)
      4. com.example.roland.libraryapp.MainActivity$2.onResponse(MainActivity.java:71)
      4 frames
    3. Android-Volley Library
      ExecutorDelivery$ResponseDeliveryRunnable.run
      1. com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:60)
      2. com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:30)
      3. com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:99)
      3 frames
    4. Android Platform
      ActivityThread.main
      1. android.os.Handler.handleCallback(Handler.java:751)
      2. android.os.Handler.dispatchMessage(Handler.java:95)
      3. android.os.Looper.loop(Looper.java:154)
      4. android.app.ActivityThread.main(ActivityThread.java:6077)
      4 frames
    5. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      1 frame
    6. Android
      ZygoteInit.main
      1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
      2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
      2 frames