Android Custom CursorAdapter - Get primary key in getView?

Question

I've got some code in GetView in a custom CursorAdapter that requires the primary key, and would like to set a variable equal to it.

How do I do this efficiently? GetView takes in position, convertView, and a GridView parent as arguments, so I don't have the cursor there.

Answer 1

Ask your adapter to translate ListView line number position.

I use code similar to this

public class MyCursorAdapter extends CursorAdapter {
    ...

    /** internal helper. return null if position is not available */
    private Cursor getCursorAt(int position) {
        return (Cursor) getItem(position);
    }

    /** translates offset in adapter to id of image */
    public long getImageId(int position) {
        Cursor cursor = getCursorAt(position);

        return cursor.getLong(cursor.getColumnIndex(MY_LONG_COLUMN_NAME));
    }

}