public
class
HeaderViewListAdapter
extends Object
implements
WrapperListAdapter,
Filterable
| java.lang.Object | |
| ↳ | android.widget.HeaderViewListAdapter |
ListAdapter used when a ListView has header views. This ListAdapter wraps another one and also keeps track of the header views and their associated data objects.
This is intended as a base class; you will probably not need to use this class directly in your own code.
Inherited constants |
|---|
 From
interface
android.widget.Adapter
|
Public constructors | |
|---|---|
HeaderViewListAdapter(ArrayList<ListView.FixedViewInfo> headerViewInfos, ArrayList<ListView.FixedViewInfo> footerViewInfos, ListAdapter adapter)
|
|
Public methods | |
|---|---|
boolean
|
areAllItemsEnabled()
Indicates whether all the items in this adapter are enabled. |
int
|
getCount()
How many items are in the data set represented by this Adapter. |
Filter
|
getFilter()
Returns a filter that can be used to constrain data with a filtering pattern. |
int
|
getFootersCount()
|
int
|
getHeadersCount()
|
Object
|
getItem(int position)
Get the data item associated with the specified position in the data set. |
long
|
getItemId(int position)
Get the row id associated with the specified position in the list. |
int
|
getItemViewType(int position)
Get the type of View that will be created by |
View
|
getView(int position, View convertView, ViewGroup parent)
Get a View that displays the data at the specified position in the data set. |
int
|
getViewTypeCount()
Returns the number of types of Views that will be created by
|
ListAdapter
|
getWrappedAdapter()
Returns the adapter wrapped by this list adapter. |
boolean
|
hasStableIds()
Indicates whether the item ids are stable across changes to the underlying data. |
boolean
|
isEmpty()
|
boolean
|
isEnabled(int position)
Returns true if the item at the specified position is not a separator. |
void
|
registerDataSetObserver(DataSetObserver observer)
Register an observer that is called when changes happen to the data used by this adapter. |
boolean
|
removeFooter(View v)
|
boolean
|
removeHeader(View v)
|
void
|
unregisterDataSetObserver(DataSetObserver observer)
Unregister an observer that has previously been registered with this
adapter via |
Inherited methods | |
|---|---|
From
class
java.lang.Object
| |
From
interface
android.widget.WrapperListAdapter
| |
From
interface
android.widget.Filterable
| |
From
interface
android.widget.ListAdapter
| |
From
interface
android.widget.Adapter
| |
HeaderViewListAdapter (ArrayList<ListView.FixedViewInfo> headerViewInfos, ArrayList<ListView.FixedViewInfo> footerViewInfos, ListAdapter adapter)
| Parameters | |
|---|---|
headerViewInfos |
ArrayList
|
footerViewInfos |
ArrayList
|
adapter |
ListAdapter
|
boolean areAllItemsEnabled ()
Indicates whether all the items in this adapter are enabled. If the value returned by this method changes over time, there is no guarantee it will take effect. If true, it means all items are selectable and clickable (there is no separator.)
| Returns | |
|---|---|
boolean |
True if all items are enabled, false otherwise. |
int getCount ()
How many items are in the data set represented by this Adapter.
| Returns | |
|---|---|
int |
Count of items. |
Filter getFilter ()
Returns a filter that can be used to constrain data with a filtering pattern.
This method is usually implemented by Adapter
classes.
| Returns | |
|---|---|
Filter |
a filter used to constrain data |
Object getItem (int position)
Get the data item associated with the specified position in the data set.
| Parameters | |
|---|---|
position |
int:
Position of the item whose data we want within the adapter's
data set. |
| Returns | |
|---|---|
Object |
The data at the specified position. |
long getItemId (int position)
Get the row id associated with the specified position in the list.
| Parameters | |
|---|---|
position |
int:
The position of the item within the adapter's data set whose row id we want. |
| Returns | |
|---|---|
long |
The id of the item at the specified position. |
int getItemViewType (int position)
Get the type of View that will be created by getView(int, View, ViewGroup) for the specified item.
| Parameters | |
|---|---|
position |
int:
The position of the item within the adapter's data set whose view type we
want. |
| Returns | |
|---|---|
int |
An integer representing the type of View. Two views should share the same type if one
can be converted to the other in getView(int, View, ViewGroup). Note: Integers must be in the
range 0 to getViewTypeCount() - 1. IGNORE_ITEM_VIEW_TYPE can
also be returned. |
View getView (int position, View convertView, ViewGroup parent)
Get a View that displays the data at the specified position in the data set. You can either
create a View manually or inflate it from an XML layout file. When the View is inflated, the
parent View (GridView, ListView...) will apply default layout parameters unless you use
inflate(int, android.view.ViewGroup, boolean)
to specify a root view and to prevent attachment to the root.
| Parameters | |
|---|---|
position |
int:
The position of the item within the adapter's data set of the item whose view
we want. |
convertView |
View:
The old view to reuse, if possible. Note: You should check that this view
is non-null and of an appropriate type before using. If it is not possible to convert
this view to display the correct data, this method can create a new view.
Heterogeneous lists can specify their number of view types, so that this View is
always of the right type (see getViewTypeCount() and
getItemViewType(int)). |
parent |
ViewGroup:
The parent that this view will eventually be attached to |
| Returns | |
|---|---|
View |
A View corresponding to the data at the specified position. |
int getViewTypeCount ()
Returns the number of types of Views that will be created by
getView(int, View, ViewGroup). Each type represents a set of views that can be
converted in getView(int, View, ViewGroup). If the adapter always returns the same
type of View for all items, this method should return 1.
This method will only be called when the adapter is set on the AdapterView.
| Returns | |
|---|---|
int |
The number of types of Views that will be created by this adapter |
ListAdapter getWrappedAdapter ()
Returns the adapter wrapped by this list adapter.
| Returns | |
|---|---|
ListAdapter |
The ListAdapter wrapped by this adapter.
|
boolean hasStableIds ()
Indicates whether the item ids are stable across changes to the underlying data.
| Returns | |
|---|---|
boolean |
True if the same id always refers to the same object. |
boolean isEnabled (int position)
Returns true if the item at the specified position is not a separator.
(A separator is a non-selectable, non-clickable item).
The result is unspecified if position is invalid. An ArrayIndexOutOfBoundsException
should be thrown in that case for fast failure.
| Parameters | |
|---|---|
position |
int:
Index of the item |
| Returns | |
|---|---|
boolean |
True if the item is not a separator |
void registerDataSetObserver (DataSetObserver observer)
Register an observer that is called when changes happen to the data used by this adapter.
| Parameters | |
|---|---|
observer |
DataSetObserver:
the object that gets notified when the data set changes.
|
void unregisterDataSetObserver (DataSetObserver observer)
Unregister an observer that has previously been registered with this
adapter via registerDataSetObserver(DataSetObserver).
| Parameters | |
|---|---|
observer |
DataSetObserver:
the object to unregister.
|
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