SQLite Course Tutorial 6: adding a record in favorites list in SQLite database in android studio

In this tutorial, we will go on in our SQLite Course and we will add a record (student data as an example) in the favorites list.
Please watch the last tutorials before watching this tutorial to watch the course in order.
SQLite Database Tutorial: Introduction :
SQLite Course Tutorial 1: Creating SQLite database in Android Studio :
SQLite Course Tutorial 2: Inserting data with image in SQLite database in Android:
SQLite Course Tutorial 3: Retrieving saved SQLite data in a list view in Android
SQLite Course Tutorial 4: Abs Menu and Delete Record from SQLite Database in Android:
SQLite Course Tutorial 5: How to update data in SQLite Database in Android:

[jheb]

Attempt to invoke virtual method on a null object reference, any idea to solve this error, the error is at insertData in mainActivity