Android: java.lang.NullPointerException: Attempt to invoke virtual method ‘java.lang.String java.lang.Object.toString()’ on a null object reference

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Android: java.lang.NullPointerException: Attempt to invoke virtual method ‘java.lang.String java.lang.Object.toString()’ on a null object reference

  1. Android: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference

    The array in your ArrayAdapter contains at least one entry that is null. There must be no nulls there.
    The array is populated in getDiaryDBDataList() so the problem is also there.

  2. Android: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference

    The array in your ArrayAdapter contains at least one entry that is null. There must be no nulls there.
    The array is populated in getDiaryDBDataList() so the problem is also there.

Solution 1

The array in your ArrayAdapter contains at least one entry that is null. There must be no nulls there.

The array is populated in getDiaryDBDataList() so the problem is also there.

Original Author laalto Of This Content

Solution 2

Late answer but, n my case, I changed the resources tag name from integer-array to string-array and it worked fine.

Original Author Raed Of This Content

Solution 3

I guess instead of

String selectedEntry = someTextView.getText().toString();

you have to use

String selectedEntry = listAdapter.getItem(position);

Because you are using array adapter you can’t get selected item from View

Hope this will help you out

Original Author Muralikrishna G S Of This Content

Solution 4

Initialize “db_data_list” in displayItems()

ArrayList db_data_list = new ArrayList();

Original Author Nikunj Of This Content

Conclusion

So This is all About This Tutorial. Hope This Tutorial Helped You. Thank You.

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Siddharth

I am an Information Technology Engineer. I have Completed my MCA And I have 4 Year Plus Experience, I am a web developer with knowledge of multiple back-end platforms Like PHP, Node.js, Python and frontend JavaScript frameworks Like Angular, React, and Vue.

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