java.lang.NullPointerException $ExpandableAdapter.getGroupView

by

You should change this

 ((CheckedTextView) convertView).setText(parentItems.get(groupPosition));
 ((CheckedTextView) convertView).setChecked(isExpanded);

With

   if (convertView == null) {

    LayoutInflater infalInflater = (LayoutInflater)_context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.group_list, null);
     }

  TextView mGroupText = (TextView) convertView.findViewById(R.id.title);
  mGroupText.setText(parentItems.get(groupPosition));

  CheckBox mCheckBox = (CheckBox) convertView.findViewById(R.id.cb);
  mCheckBox.setChecked(isExpanded);

Your app crashed it’s because there no CheckedTextView in your group_list.xml layout file.

More Related Contents:

  1. Crash in application. RuntimeException: Unable to start activity [closed]
  2. set onclick listener not working in android for moving from one fragment to another activity [duplicate]
  3. Null pointer Exception – findViewById()
  4. Android – How To Override the “Back” button so it doesn’t Finish() my Activity?
  5. NPE while inflating layout (Attempt to invoke virtual method ‘boolean java.lang.String.equals(java.lang.Object)’ on a null object reference)
  6. Android startCamera gives me null Intent and … does it destroy my global variable?
  7. Android – NullPointerException on SearchView in Action Bar
  8. Android. Fragment getActivity() sometimes returns null
  9. My current location always returns null. How can I fix this?
  10. getActionBar() returns Null (AppCompat-v7 21)
  11. findViewById() returns null for Views in a Dialog
  12. Why getApplicationContext() in constructor of Activity throws null pointer exception?
  13. java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1888, result=0, data=null} to activity
  14. Android SDK Content Loader failing with NullPointerException
  15. SQLiteDatabase close() function causing NullPointerException when multiple threads
  16. Eclipse / Android : “Errors running builder ‘Android Pre Compiler’ on project…”
  17. How to solve NullPointerException error in Android?
  18. android.app.Application cannot be instantiated due to NullPointerException
  19. Android Api 23 Change Navigation View headerLayout textview
  20. Why Kotlin data classes can have nulls in non-nullable fields with Gson?
  21. Eclipse Upgrade Not Working
  22. NullPointer on toLowerCase but I don’t use that method anywhere
  23. How to add a SearchWidget to the ActionBar?
  24. Photo capture Intent causes NullPointerException on Samsung phones only
  25. adb not finding my device / phone (MacOS X)
  26. How to highlight row in ListView in Android?
  27. How to force keyboard with numbers in mobile website in Android
  28. How to delete other applications cache from our android app?
  29. Error: MapFragment cannot be cast to android.support.v4.app.Fragment
  30. Cordova “hello world” app won’t display

Leave a Comment