Question

I have tried to figure this out and googled through a fair few stack overflow responses but none of them seem to address this exact problem. I am trying to return the row ID so that I can update my database.

    String query= "SELECT * FROM climb_tbl WHERE climb_name ='"+climbname+"'";
    Cursor cur = db.rawQuery(query, null);
    cur.moveToFirst();
    long id = cur.getLong(cur.getColumnIndex("_id"));
    System.out.println(id);

As far as I can tell this should return the id value I need to then run the update statement, ive yet to write. Instead I get the error…..

java.lang.IllegalStateException: get field slot from row 0 col -1 failed.

Answer 1

1. Do you have _id column in your table?

2. Probably the cursor is empty. The cur.moveToFirst() returns true or false, so you can use it in the following way:

   if (cur != null && cur.moveToFirst()) {
       long id = cur.getLong(cur.getColumnIndex("_id"));
       System.out.println(id);
   }