Public getItemViewType

Return getItemViewType

Public unregisterDataSetObserver

UnregisterDataSetObserver

Public areAllItemsEnabled

Return areAllItemsEnabled

Public isEnabled

Return isEnabled

We can then subclass to create , overriding the default but otherwise allowing the delegated to do the “real work:”

Public class extends

Null

Null

Public RateableWrapper

Super

This

This new getCount

For getCount

This

Public getView

Null

If null

New LinearLayout

New RatingBar

SetNumStars

SetStepSize

GetView null

SetOrientation

SetLayoutParams new LayoutParams

SetLayoutParams new LayoutParams

New OnRatingBarChangeListener

Public onRatingChanged

GetTag

SetOnRatingBarChangeListener

AddView

AddView

New ViewWrapper

SetGuts

SetTag

SetTag new Integer

SetRating

Else

GetTag

SetGuts getView getGuts

GetRatingBar setTag new Integer

GetRatingBar setRating

Return

The idea is that is where most of our rate‑list logic resides. It puts the rating bars on the rows and it tracks the rating bars’ states as they are adjusted by the user. For the states, it has a sized to fit the number of rows that the delegate says are in the list.

’s implementation of is reminiscent of the one from , except that rather than use , we need to manually construct a to hold our and the “guts” (that is, whatever view the delegate created that we are decorating with the checkbox). is designed to construct a from raw widgets; in our case, we don’t know in advance what the rows will look like, other than that we need to add a checkbox to them. However, the rest is similar to what we saw in :

Class

Null

Null