de.mrapp.android.util.view

Class AbstractViewRecycler.Adapter<ItemType,ParamType>

java.lang.Object

de.mrapp.android.util.view.AbstractViewRecycler.Adapter<ItemType,ParamType>

Type Parameters:

ItemType - The type of the items, which should be visualized by the adapter

ParamType - The type of the optional parameters, which may be passed when inflating a view

Enclosing class:

AbstractViewRecycler<ItemType,ParamType>

public abstract static class AbstractViewRecycler.Adapter<ItemType,ParamType>
extends java.lang.Object

An abstract base class for all adapters, which are responsible for inflating views, which should be used to visualize the items of a view recycler.

Constructor Summary

Constructors

Constructor and Description
Adapter()

Method Summary

Modifier and Type	Method and Description
int	getViewType(ItemType item) Returns the view type, which corresponds to a specific item.
int	getViewTypeCount() Returns the number of view types, which are used by the adapter.
abstract android.view.View	onInflateView(android.view.LayoutInflater inflater, android.view.ViewGroup parent, ItemType item, int viewType, ParamType... params) The method, which is invoked in order to inflate the view, which should be used to visualize a specific item.
void	onRemoveView(android.view.View view, ItemType item) The method, which is invoked when a previously inflated view is about to be removed from its parent.
abstract void	onShowView(android.content.Context context, android.view.View view, ItemType item, boolean inflated, ParamType... params) The method, which is invoked in order to adapt the appearance of the view, which is used to visualize a specific item.

Methods inherited from class java.lang.Object

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

Constructor Detail

Adapter

public Adapter()

Method Detail

onInflateView

public abstract android.view.View onInflateView(android.view.LayoutInflater inflater,
                                                android.view.ViewGroup parent,
                                                ItemType item,
                                                int viewType,
                                                ParamType... params)

The method, which is invoked in order to inflate the view, which should be used to visualize a specific item. This method is only called, if no cached views are available to be reused. It should only inflate the appropriate layout for visualizing an item. For modifying the appearance of the layout's children, the method onShowItem is responsible.

Parameters:

inflater - The layout inflater, which should be used to inflate the view, as an instance of the class LayoutInflater. The layout inflater may not be null

parent - The parent, the inflated view will be added to, as an instance of the class ViewGroup or null, if the view will not be added to a parent

item - The item, which should be visualized by the inflated view, as an instance of the generic type ItemType. The item may not be null

viewType - The view type, which corresponds to the item, which should be visualized, as an Integer value

params - An array, which may contain optional parameters, as an array of the generic type ParamType or an empty array, if no optional parameters are available

Returns:

The view, which has been inflated, as an instance of the class View. The view may not be null

onShowView

public abstract void onShowView(android.content.Context context,
                                android.view.View view,
                                ItemType item,
                                boolean inflated,
                                ParamType... params)

The method, which is invoked in order to adapt the appearance of the view, which is used to visualize a specific item. This method is called every time a view has been inflated or reused.

Parameters:

context - The context, which is used by the adapter, as an instance of the class Context. The context may not be null

view - The view, whose appearance should be adapted, as an instance of the class View. The view may not be null

item - The item, which should be visualized, as an instance of the generic type ItemType. The item may not be null

inflated - True, if the view has been inflated, false, if it has been reused

params - An array, which may contain optional parameters, as an array of the generic type ParamType or an empty array, if no optional parameters are available

onRemoveView

public void onRemoveView(android.view.View view,
                         ItemType item)

The method, which is invoked when a previously inflated view is about to be removed from its parent. It may be overridden in order to reset the view's state. This is for example necessary, if children, which are reused themselves using a different lifecycle, are attached to the view.

Parameters:

view - The view, which is about to be removed from its parent, as an instance of the class View. The view may not be null

item - The item, which is visualized by the view, which is about to be removed, as an instance of the generic type ItemType. The item may not be null

getViewType

public int getViewType(ItemType item)

Returns the view type, which corresponds to a specific item. For each layout, which is inflated by the onInflateView-method, a distinct view type must be returned.

Parameters:

item - The item, whose view type should be returned, as an instance of the generic type ItemType. The item may not be null

Returns:

The view type, which corresponds to the given item, as an Integer value

getViewTypeCount

public int getViewTypeCount()

Returns the number of view types, which are used by the adapter.

Returns:

The number of view types, which are used by the adapter, as an Integer value. The number of view types must correspond to the number of distinct values, which are returned by the getViewType-method