Error when running app

[cavb]

Hey!
Nice tutorial!
Got this error when running the app

Caused by: java.lang.NumberFormatException: Invalid int: "null"

Im curious why "cursor.getString(0)" is returning null (line 90 at DBHandler.java).
Commenting this line makes the app runnable.

08-09 22:04:47.358 4399-4399/com.mobilesiri.sqliteexample E/AndroidRuntime: FATAL EXCEPTION: main Process: com.mobilesiri.sqliteexample, PID: 4399 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mobilesiri.sqliteexample/com.mobilesiri.sqliteexample.MainActivity}: java.lang.NumberFormatException: Invalid int: "null" at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2314) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2388) at android.app.ActivityThread.access$800(ActivityThread.java:148) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1292) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5312) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:901) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696) Caused by: java.lang.NumberFormatException: Invalid int: "null" at java.lang.Integer.invalidInt(Integer.java:138) at java.lang.Integer.parseInt(Integer.java:358) at java.lang.Integer.parseInt(Integer.java:334) at com.mobilesiri.sqliteexample.DBHandler.getAllShops(DBHandler.java:90) at com.mobilesiri.sqliteexample.MainActivity.onCreate(MainActivity.java:27) ...