public
class
HeaderViewListAdapter
extends Object
implements
Filterable,
WrapperListAdapter
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.
Summary
Inherited methods |
From class
java.lang.Object
Object
|
clone()
Creates and returns a copy of this object.
|
boolean
|
equals(Object obj)
Indicates whether some other object is "equal to" this one.
|
void
|
finalize()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
|
final
Class<?>
|
getClass()
Returns the runtime class of this Object .
|
int
|
hashCode()
Returns a hash code value for the object.
|
final
void
|
notify()
Wakes up a single thread that is waiting on this object's
monitor.
|
final
void
|
notifyAll()
Wakes up all threads that are waiting on this object's monitor.
|
String
|
toString()
Returns a string representation of the object.
|
final
void
|
wait(long timeoutMillis, int nanos)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
|
final
void
|
wait(long timeoutMillis)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
|
final
void
|
wait()
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted.
|
|
From interface
android.widget.Filterable
abstract
Filter
|
getFilter()
Returns a filter that can be used to constrain data with a filtering
pattern.
|
|
From interface
android.widget.WrapperListAdapter
|
From interface
android.widget.ListAdapter
abstract
boolean
|
areAllItemsEnabled()
Indicates whether all the items in this adapter are enabled.
|
abstract
boolean
|
isEnabled(int position)
Returns true if the item at the specified position is not a separator.
|
|
From interface
android.widget.Adapter
|
Public constructors
Public methods
areAllItemsEnabled
public 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. |
getCount
public int getCount ()
How many items are in the data set represented by this Adapter.
Returns |
int |
Count of items. |
getFilter
public 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 |
public int getFootersCount ()
public int getHeadersCount ()
getItem
public 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. |
getItemId
public 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. |
getItemViewType
public 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. |
getView
public 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
LayoutInflater.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. |
getViewTypeCount
public 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 |
getWrappedAdapter
public ListAdapter getWrappedAdapter ()
Returns the adapter wrapped by this list adapter.
hasStableIds
public 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. |
isEmpty
public boolean isEmpty ()
isEnabled
public 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 |
registerDataSetObserver
public 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. |
public boolean removeFooter (View v)
removeHeader
public boolean removeHeader (View v)
unregisterDataSetObserver
public 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. |