com.hannesdorfmann.adapterdelegates4

Class AbsListItemAdapterDelegate<I extends T,T,VH extends androidx.recyclerview.widget.RecyclerView.ViewHolder>

java.lang.Object

com.hannesdorfmann.adapterdelegates4.AdapterDelegate<java.util.List<T>>

com.hannesdorfmann.adapterdelegates4.AbsListItemAdapterDelegate<I,T,VH>

Type Parameters:

I - The type of the item that is managed by this AdapterDelegate. Must be a subtype of T

T - The generic type of the list, in other words: List<T>

VH - The type of the ViewHolder

public abstract class AbsListItemAdapterDelegate<I extends T,T,VH extends androidx.recyclerview.widget.RecyclerView.ViewHolder>
extends AdapterDelegate<java.util.List<T>>

A simplified AdapterDelegate when the underlying adapter's dataset is a List. This class helps to reduce writing boilerplate code like casting list item and casting ViewHolder.

For instance if you have a list of animals (different kind of animals in classes like Cat, Dog etc. assuming all have a common super class Animal) you want to display in your adapter and you want to create a CatAdapterDelegate then this class would look like this: {@code class CatAdapterDelegate extends AbsListItemAdapterDelegate{

Since:

1.2

Constructor Summary

Constructors

Constructor and Description
AbsListItemAdapterDelegate()

Method Summary

Modifier and Type	Method and Description
protected boolean	isForViewType(java.util.List<T> items, int position) Called to determine whether this AdapterDelegate is the responsible for the given data element.
protected abstract boolean	isForViewType(T item, java.util.List<T> items, int position) Called to determine whether this AdapterDelegate is the responsible for the given item in the list or not element
protected abstract void	onBindViewHolder(I item, VH holder, java.util.List<java.lang.Object> payloads) Called to bind the RecyclerView.ViewHolder to the item of the dataset
protected void	onBindViewHolder(java.util.List<T> items, int position, androidx.recyclerview.widget.RecyclerView.ViewHolder holder, java.util.List<java.lang.Object> payloads) Called to bind the RecyclerView.ViewHolder to the item of the datas source set
protected abstract VH	onCreateViewHolder(android.view.ViewGroup parent) Creates the RecyclerView.ViewHolder for the given data source item

Methods inherited from class com.hannesdorfmann.adapterdelegates4.AdapterDelegate

onFailedToRecycleView, onViewAttachedToWindow, onViewDetachedFromWindow, onViewRecycled

Methods inherited from class java.lang.Object

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

Constructor Detail

AbsListItemAdapterDelegate

public AbsListItemAdapterDelegate()

Method Detail

isForViewType

protected final boolean isForViewType(@NonNull
                                      java.util.List<T> items,
                                      int position)

Description copied from class: AdapterDelegate

Called to determine whether this AdapterDelegate is the responsible for the given data element.

Specified by:

isForViewType in class AdapterDelegate<java.util.List<T>>

Parameters:

items - The data source of the Adapter

position - The position in the datasource

Returns:

true, if this item is responsible, otherwise false

onBindViewHolder

protected final void onBindViewHolder(@NonNull
                                      java.util.List<T> items,
                                      int position,
                                      @NonNull
                                      androidx.recyclerview.widget.RecyclerView.ViewHolder holder,
                                      @NonNull
                                      java.util.List<java.lang.Object> payloads)

Description copied from class: AdapterDelegate

Called to bind the RecyclerView.ViewHolder to the item of the datas source set

Specified by:

onBindViewHolder in class AdapterDelegate<java.util.List<T>>

Parameters:

items - The data source

position - The position in the datasource

holder - The RecyclerView.ViewHolder to bind

payloads - A non-null list of merged payloads. Can be empty list if requires full update.

isForViewType

protected abstract boolean isForViewType(@NonNull
                                         T item,
                                         @NonNull
                                         java.util.List<T> items,
                                         int position)

Called to determine whether this AdapterDelegate is the responsible for the given item in the list or not element

Parameters:

item - The item from the list at the given position

items - The items from adapters dataset

position - The items position in the dataset (list)

Returns:

true if this AdapterDelegate is responsible for that, otherwise false

onCreateViewHolder

@NonNull
protected abstract VH onCreateViewHolder(@NonNull
                                                  android.view.ViewGroup parent)

Creates the RecyclerView.ViewHolder for the given data source item

Specified by:

onCreateViewHolder in class AdapterDelegate<java.util.List<T>>

Parameters:

parent - The ViewGroup parent of the given datasource

Returns:

ViewHolder

onBindViewHolder

protected abstract void onBindViewHolder(@NonNull
                                         I item,
                                         @NonNull
                                         VH holder,
                                         @NonNull
                                         java.util.List<java.lang.Object> payloads)

Called to bind the RecyclerView.ViewHolder to the item of the dataset

Parameters:

item - The data item

holder - The ViewHolder

payloads - The payloads