android.database.sqlite.SQLiteException: no such column

For string data type always use quotes like this '"+rid+"'" since rid is String you get error.

You should use +rid only if rid is int.

you need to use apostrophe(') in Where clause checking.. like

db.rawQuery("SELECT _id FROM  Meeting   where meet='"+rid+"'" , null);

Or, better yet, use a PreparedStatement and bind your variables. It'll escape strings and dates properly for you. It'll also help with SQL injection problems.

You can also use like this.

db.rawQuery("SELECT _id FROM  Meeting   where meet=?" ,
            new String [] {rid});

This will also solve for SQL injection problem.