com.hannesdorfmann.adapterdelegates4

Class AsyncListDifferDelegationAdapter<T>

java.lang.Object

androidx.recyclerview.widget.RecyclerView.Adapter

com.hannesdorfmann.adapterdelegates4.AsyncListDifferDelegationAdapter<T>

Type Parameters:

T - The type of the datasource / items. Internally we will use List<T> but you only have to provide T (and not List<T>). Its safe to use this with AbsListItemAdapterDelegate.

public class AsyncListDifferDelegationAdapter<T>
extends androidx.recyclerview.widget.RecyclerView.Adapter

An implementation of an Adapter that already uses a AdapterDelegatesManager pretty same as AbsDelegationAdapter but also uses AsyncListDiffer from support library 27.0.1 for calculating diffs between old and new collections of items and does this on background thread. That means that now you should not carry about RecyclerView.Adapter#notifyItemChanged(int) and other methods of adapter, all you need to do is to submit a new list into adapter and all diffs will be calculated for you. You just have to add the AdapterDelegates i.e. in the constructor of a subclass that inheritance from this class:

 
    class MyAdapter extends AsyncListDifferDelegationAdapter<MyDataSourceType> {
        public MyAdapter() {
            this.delegatesManager.add(new FooAdapterDelegate())
                                 .add(new BarAdapterDelegate());
        }
    }
 
 

Field Summary

Fields

Modifier and Type	Field and Description
protected AdapterDelegatesManager<java.util.List<T>>	delegatesManager
protected androidx.recyclerview.widget.AsyncListDiffer<T>	differ

Constructor Summary

Constructors

Constructor and Description
AsyncListDifferDelegationAdapter(androidx.recyclerview.widget.AsyncDifferConfig differConfig, AdapterDelegatesManager<java.util.List<T>> delegatesManager)
AsyncListDifferDelegationAdapter(androidx.recyclerview.widget.DiffUtil.ItemCallback<T> diffCallback)
AsyncListDifferDelegationAdapter(androidx.recyclerview.widget.DiffUtil.ItemCallback<T> diffCallback, AdapterDelegatesManager<java.util.List<T>> delegatesManager)

Method Summary

Modifier and Type	Method and Description
int	getItemCount()
java.util.List<T>	getItems() Get the items / data source of this adapter
int	getItemViewType(int position)
void	onBindViewHolder(androidx.recyclerview.widget.RecyclerView.ViewHolder holder, int position)
void	onBindViewHolder(androidx.recyclerview.widget.RecyclerView.ViewHolder holder, int position, java.util.List payloads)
androidx.recyclerview.widget.RecyclerView.ViewHolder	onCreateViewHolder(android.view.ViewGroup parent, int viewType)
boolean	onFailedToRecycleView(androidx.recyclerview.widget.RecyclerView.ViewHolder holder)
void	onViewAttachedToWindow(androidx.recyclerview.widget.RecyclerView.ViewHolder holder)
void	onViewDetachedFromWindow(androidx.recyclerview.widget.RecyclerView.ViewHolder holder)
void	onViewRecycled(androidx.recyclerview.widget.RecyclerView.ViewHolder holder)
void	setItems(java.util.List<T> items) Set the items / data source of this adapter

Methods inherited from class androidx.recyclerview.widget.RecyclerView.Adapter

bindViewHolder, createViewHolder, getItemId, hasObservers, hasStableIds, notifyDataSetChanged, notifyItemChanged, notifyItemChanged, notifyItemInserted, notifyItemMoved, notifyItemRangeChanged, notifyItemRangeChanged, notifyItemRangeInserted, notifyItemRangeRemoved, notifyItemRemoved, onAttachedToRecyclerView, onDetachedFromRecyclerView, registerAdapterDataObserver, setHasStableIds, unregisterAdapterDataObserver

Methods inherited from class java.lang.Object

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

Field Detail

delegatesManager

protected final AdapterDelegatesManager<java.util.List<T>> delegatesManager

differ

protected final androidx.recyclerview.widget.AsyncListDiffer<T> differ

Constructor Detail

AsyncListDifferDelegationAdapter

public AsyncListDifferDelegationAdapter(@NonNull
                                        androidx.recyclerview.widget.DiffUtil.ItemCallback<T> diffCallback)

AsyncListDifferDelegationAdapter

public AsyncListDifferDelegationAdapter(@NonNull
                                        androidx.recyclerview.widget.DiffUtil.ItemCallback<T> diffCallback,
                                        @NonNull
                                        AdapterDelegatesManager<java.util.List<T>> delegatesManager)

AsyncListDifferDelegationAdapter

public AsyncListDifferDelegationAdapter(@NonNull
                                        androidx.recyclerview.widget.AsyncDifferConfig differConfig,
                                        @NonNull
                                        AdapterDelegatesManager<java.util.List<T>> delegatesManager)

Method Detail

onCreateViewHolder

@NonNull
public androidx.recyclerview.widget.RecyclerView.ViewHolder onCreateViewHolder(@NonNull
                                                                                        android.view.ViewGroup parent,
                                                                                        int viewType)

Specified by:

onCreateViewHolder in class androidx.recyclerview.widget.RecyclerView.Adapter

onBindViewHolder

public void onBindViewHolder(@NonNull
                             androidx.recyclerview.widget.RecyclerView.ViewHolder holder,
                             int position)

Specified by:

onBindViewHolder in class androidx.recyclerview.widget.RecyclerView.Adapter

onBindViewHolder

public void onBindViewHolder(@NonNull
                             androidx.recyclerview.widget.RecyclerView.ViewHolder holder,
                             int position,
                             @NonNull
                             java.util.List payloads)

Overrides:

onBindViewHolder in class androidx.recyclerview.widget.RecyclerView.Adapter

getItemViewType

public int getItemViewType(int position)

Overrides:

getItemViewType in class androidx.recyclerview.widget.RecyclerView.Adapter

onViewRecycled

public void onViewRecycled(@NonNull
                           androidx.recyclerview.widget.RecyclerView.ViewHolder holder)

Overrides:

onViewRecycled in class androidx.recyclerview.widget.RecyclerView.Adapter

onFailedToRecycleView

public boolean onFailedToRecycleView(@NonNull
                                     androidx.recyclerview.widget.RecyclerView.ViewHolder holder)

Overrides:

onFailedToRecycleView in class androidx.recyclerview.widget.RecyclerView.Adapter

onViewAttachedToWindow

public void onViewAttachedToWindow(@NonNull
                                   androidx.recyclerview.widget.RecyclerView.ViewHolder holder)

Overrides:

onViewAttachedToWindow in class androidx.recyclerview.widget.RecyclerView.Adapter

onViewDetachedFromWindow

public void onViewDetachedFromWindow(@NonNull
                                     androidx.recyclerview.widget.RecyclerView.ViewHolder holder)

Overrides:

onViewDetachedFromWindow in class androidx.recyclerview.widget.RecyclerView.Adapter

getItems

public java.util.List<T> getItems()

Get the items / data source of this adapter

Returns:

The items / data source

setItems

public void setItems(java.util.List<T> items)

Set the items / data source of this adapter

Parameters:

items - The items / data source

getItemCount

public int getItemCount()

Specified by:

getItemCount in class androidx.recyclerview.widget.RecyclerView.Adapter