belongs to Maven artifact com.android.support:recyclerview-v7:28.0.0-alpha1
SortedList.BatchedCallback
public
static
class
SortedList.BatchedCallback
extends Callback<T2>
java.lang.Object | ||
↳ | android.support.v7.util.SortedList.Callback<T2> | |
↳ | android.support.v7.util.SortedList.BatchedCallback<T2> |
A callback implementation that can batch notify events dispatched by the SortedList.
This class can be useful if you want to do multiple operations on a SortedList but don't want to dispatch each event one by one, which may result in a performance issue.
For example, if you are going to add multiple items to a SortedList, BatchedCallback call
convert individual onInserted(index, 1)
calls into one
onInserted(index, N)
if items are added into consecutive indices. This change
can help RecyclerView resolve changes much more easily.
If consecutive changes in the SortedList are not suitable for batching, BatchingCallback
dispatches them as soon as such case is detected. After your edits on the SortedList is
complete, you must always call dispatchLastEvent()
to flush
all changes to the Callback.
Summary
Public constructors | |
---|---|
SortedList.BatchedCallback(Callback<T2> wrappedCallback)
Creates a new BatchedCallback that wraps the provided Callback. |
Public methods | |
---|---|
boolean
|
areContentsTheSame(T2 oldItem, T2 newItem)
Called by the SortedList when it wants to check whether two items have the same data or not. |
boolean
|
areItemsTheSame(T2 item1, T2 item2)
Called by the SortedList to decide whether two objects represent the same Item or not. |
int
|
compare(T2 o1, T2 o2)
Similar to |
void
|
dispatchLastEvent()
This method dispatches any pending event notifications to the wrapped Callback. |
Object
|
getChangePayload(T2 item1, T2 item2)
When |
void
|
onChanged(int position, int count, Object payload)
Called when |
void
|
onChanged(int position, int count)
Called by the SortedList when the item at the given position is updated. |
void
|
onInserted(int position, int count)
|
void
|
onMoved(int fromPosition, int toPosition)
|
void
|
onRemoved(int position, int count)
|
Inherited methods | |
---|---|
![]()
android.support.v7.util.SortedList.Callback
|