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  • delete a listview that retrieves from database
    via Stack Overflow by Erik_DA
    • java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.example.eric.myapp6.model.User_answer.getKonkoor_num()' on a null object reference at com.example.eric.myapp6.database.DataBase.deleteUser( at com.example.eric.myapp6.exam_resault.pasokh_azmoon$1.onClick(
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