Package com.kernelcrew.moodapp.ui

Class MoodHistoryAdapter

java.lang.Object

androidx.recyclerview.widget.RecyclerView.Adapter<MoodHistoryAdapter.MoodViewHolder>

com.kernelcrew.moodapp.ui.MoodHistoryAdapter

public class MoodHistoryAdapter
extends androidx.recyclerview.widget.RecyclerView.Adapter<MoodHistoryAdapter.MoodViewHolder>

Adapter class for binding mood event data to the RecyclerView in the mood history screen.

This adapter manages the display of mood events in a list format. It shows the date and sequential numbering of each mood event. It also handles click events on items through the MoodHistoryAdapter.OnItemClickListener interface.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	MoodHistoryAdapter.MoodViewHolder	ViewHolder class for mood event items.
static interface	MoodHistoryAdapter.OnItemClickListener	Interface for handling click events on mood items in the RecyclerView.

Constructor Summary

Constructors

Constructor	Description
MoodHistoryAdapter(List<MoodEvent> moods, MoodHistoryAdapter.OnItemClickListener listener)	Constructs a new MoodHistoryAdapter with the specified data and listener.

Method Summary

Modifier and Type	Method	Description
int	getItemCount()	Returns the total number of items in the data set.
List<MoodEvent>	getItems()	Returns a copy of the current list of mood events.
void	onBindViewHolder(MoodHistoryAdapter.MoodViewHolder holder, int position)	Binds data to the ViewHolder at the specified position.
MoodHistoryAdapter.MoodViewHolder	onCreateViewHolder(ViewGroup parent, int viewType)	Creates a new ViewHolder when needed by the RecyclerView.
void	setMoods(List<MoodEvent> moods)	Updates the adapter's data set with a new list of mood events.

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

bindViewHolder, createViewHolder, getItemId, getItemViewType, hasObservers, hasStableIds, notifyDataSetChanged, notifyItemChanged, notifyItemChanged, notifyItemInserted, notifyItemMoved, notifyItemRangeChanged, notifyItemRangeChanged, notifyItemRangeInserted, notifyItemRangeRemoved, notifyItemRemoved, onAttachedToRecyclerView, onBindViewHolder, onDetachedFromRecyclerView, onFailedToRecycleView, onViewAttachedToWindow, onViewDetachedFromWindow, onViewRecycled, registerAdapterDataObserver, setHasStableIds, unregisterAdapterDataObserver

Methods inherited from class java.lang.Object

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

Constructor Details

MoodHistoryAdapter

public MoodHistoryAdapter(List<MoodEvent> moods,
 MoodHistoryAdapter.OnItemClickListener listener)

Constructs a new MoodHistoryAdapter with the specified data and listener.

Parameters:

moods - List of mood events to display; if null, an empty list is used

listener - Callback for item click events

Method Details

setMoods

public void setMoods(List<MoodEvent> moods)

Updates the adapter's data set with a new list of mood events.

Replaces the existing list of mood events and notifies the adapter to refresh the RecyclerView.

Parameters:

moods - New list of mood events to display

onCreateViewHolder

@NonNull
public MoodHistoryAdapter.MoodViewHolder onCreateViewHolder(@NonNull
 ViewGroup parent,
 int viewType)

Creates a new ViewHolder when needed by the RecyclerView.

Inflates the mood item layout and wraps it in a ViewHolder.

Specified by:

onCreateViewHolder in class androidx.recyclerview.widget.RecyclerView.Adapter<MoodHistoryAdapter.MoodViewHolder>

Parameters:

parent - The ViewGroup into which the new View will be added

viewType - The view type of the new View

Returns:

A new ViewHolder that holds the View for each mood item

onBindViewHolder

public void onBindViewHolder(@NonNull
 MoodHistoryAdapter.MoodViewHolder holder,
 int position)

Binds data to the ViewHolder at the specified position.

Sets the date and event number text, and configures the click listener for the item view.

Specified by:

onBindViewHolder in class androidx.recyclerview.widget.RecyclerView.Adapter<MoodHistoryAdapter.MoodViewHolder>

Parameters:

holder - The ViewHolder to bind data to

position - The position of the item in the data set

getItemCount

public int getItemCount()

Returns the total number of items in the data set.

Specified by:

getItemCount in class androidx.recyclerview.widget.RecyclerView.Adapter<MoodHistoryAdapter.MoodViewHolder>

Returns:

The number of mood events in the list

getItems

public List<MoodEvent> getItems()

Returns a copy of the current list of mood events.

Creates a new ArrayList to avoid exposing the internal list to modification.

Returns:

A copy of the current list of mood events