com.globusltd.recyclerview.datasource

Class DatasourceObserver

java.lang.Object

com.globusltd.recyclerview.datasource.DatasourceObserver

Direct Known Subclasses:

AdapterDatasourceObserver

@MainThread
public abstract class DatasourceObserver
extends Object

Observer base class for watching changes to a Datasource. See Datasource.registerDatasourceObserver(DatasourceObserver).

Constructor Summary

Constructors

Constructor and Description
DatasourceObserver()

Method Summary

Modifier and Type	Method and Description
void	onChanged() Called when the data in the datasource have been changed.
void	onItemMoved(int fromPosition, int toPosition) Called when the data have been moved to the another position in the datasource.
void	onItemRangeChanged(int positionStart, int itemCount, Object payload) Called when the data in the datasource have been changed.
void	onItemRangeInserted(int positionStart, int itemCount) Called when the new data have been inserted to the datasource.
void	onItemRangeRemoved(int positionStart, int itemCount) Called when the new data have been removed from the datasource.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DatasourceObserver

public DatasourceObserver()

Method Detail

onChanged

public void onChanged()

Called when the data in the datasource have been changed.

onItemRangeChanged

public void onItemRangeChanged(int positionStart,
                               int itemCount,
                               @Nullable
                               Object payload)

Called when the data in the datasource have been changed. Note that method can be called multiple times.

Parameters:

positionStart - Position of the first data item that has changed.

itemCount - Number of the data items that have changed.

payload - Optional parameter, use null to identify a "full" update.

onItemRangeInserted

public void onItemRangeInserted(int positionStart,
                                int itemCount)

Called when the new data have been inserted to the datasource. Note that method can be called multiple times.

Parameters:

positionStart - Position of the first data item that was inserted.

itemCount - Number of the data items inserted.

onItemRangeRemoved

public void onItemRangeRemoved(int positionStart,
                               int itemCount)

Called when the new data have been removed from the datasource. Note that method can be called multiple times.

Parameters:

positionStart - Position of the first data item that was removed.

itemCount - Number of the data items removed.

onItemMoved

public void onItemMoved(int fromPosition,
                        int toPosition)

Called when the data have been moved to the another position in the datasource. Note that method can be called multiple times.

Parameters:

fromPosition - Previous position of the data item.

toPosition - New position of the data item.