Save result from SQL query to ArrayList Android

I'm trying to understand how to save result from SQL queries in android to an arraylist.  Actually I find a few questions but none of them can answer why my code is wrong. So here is what I'm trying to do :

        String query = null;
        query = "SELECT * FROM users WHERE objectId = "+objectId+" AND serverName "+serverName;

        SQLiteDatabase db;

        // Insert results from query in database.
        ArrayList <String[]> result = new ArrayList<String[]>();
        ResultSet rs = db.execSQL(query);
        int columnCount = rs.getMetaData().getColumnCount();
        while(rs.next())
  开发者_高级运维      {
            String[] row = new String[columnCount];
            for (int i=0; i <columnCount ; i++)
            {
               row[i] = rs.getString(i + 1);
            }
            result.add(row);
        }

And the error is saying that I cannot convert void to ResultSet. Any suggestions how to fix that or which is the right way to do this.

Thanks in advance

---

Once your database is open for reading use db.query or db.rawQuery to get a cursor that can be used to create your ArrayList

cursor = db.rawQuery(<query>, null);
            if(cursor.getCount() > 0)
            {
                cursor.moveToFirst();
                //add to list here 
            }