java.lang.NullPointerException: Attempt to invoke interface method 'int java.util.List.size()' on a null object reference

Stack Overflow | user1426900 | 8 months ago
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  1. 0

    Exception java.util.List.size() raised for unknown reason

    Stack Overflow | 8 months ago | user1426900
    java.lang.NullPointerException: Attempt to invoke interface method 'int java.util.List.size()' on a null object reference
  2. 0

    android-studio JSON ERROR [ java.util.List.size()' on a null object reference]

    Stack Overflow | 1 year ago | Jordy Ruiz
    java.lang.NullPointerException: Attempt to invoke interface method 'int java.util.List.size()' on a null object reference
  3. 0

    Value of string cannot be converted to JSONArray

    Stack Overflow | 1 year ago | tontonlayxx
    java.lang.NullPointerException: Attempt to invoke interface method 'int java.util.List.size()' on a null object reference
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  5. 0

    intent NullPointerException at onPostExecute

    Stack Overflow | 4 years ago | user2734352
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.hesham.sams/com.hesham.sams.ListActivity1}: java.lang.NullPointerException

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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke interface method 'int java.util.List.size()' on a null object reference

      at android.widget.SimpleAdapter.getCount()
    2. Android Platform
      ListActivity.setListAdapter
      1. android.widget.SimpleAdapter.getCount(SimpleAdapter.java:100)
      2. android.widget.ListView.setAdapter(ListView.java:491)
      3. android.app.ListActivity.setListAdapter(ListActivity.java:265)
      3 frames
    3. com.example.example
      ActivityFeedActivity$GetStudents.onPostExecute
      1. com.example.example.feed.ActivityFeedActivity$GetStudents.onPostExecute(ActivityFeedActivity.java:93)
      2. com.example.example.feed.ActivityFeedActivity$GetStudents.onPostExecute(ActivityFeedActivity.java:47)
      2 frames
    4. Android Platform
      AsyncTask.finish
      1. android.os.AsyncTask.finish(AsyncTask.java:651)
      1 frame