java.lang.Object | |
↳ | android.widget.BaseAdapter |
Known Direct Subclasses |
Known Indirect Subclasses |
Common base class of common implementation for an Adapter
that can be
used in both ListView
(by implementing the specialized
ListAdapter
interface) and Spinner
(by implementing the
specialized SpinnerAdapter
interface).
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Inherited Constants | |||||||||||
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From interface
android.widget.Adapter
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Public Constructors | |||||||||||
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Public Methods | |||||||||||
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Indicates whether all the items in this adapter are enabled.
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Get a | |||||||||||
Get the type of View that will be created by
getView(int, View, ViewGroup) for the specified item. | |||||||||||
Returns the number of types of Views that will be created by
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Indicates whether the item ids are stable across changes to the
underlying data.
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Returns true if the item at the specified position is not a separator.
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Notifies the attached observers that the underlying data has been changed
and any View reflecting the data set should refresh itself.
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Notifies the attached observers that the underlying data is no longer valid
or available.
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Register an observer that is called when changes happen to the data used by this adapter.
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Unregister an observer that has previously been registered with this
adapter via
registerDataSetObserver(DataSetObserver) . |
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Inherited Methods | |||||||||||
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From class
java.lang.Object
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From interface
android.widget.Adapter
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From interface
android.widget.ListAdapter
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From interface
android.widget.SpinnerAdapter
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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.)
Get a View
that displays in the drop down popup
the data at the specified position in the data set.
position | index of the item whose view we want. |
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convertView | 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. |
parent | the parent that this view will eventually be attached to |
View
corresponding to the data at the
specified position.
Get the type of View that will be created by getView(int, View, ViewGroup)
for the specified item.
position | The position of the item within the adapter's data set whose view type we want. |
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getView(int, View, ViewGroup)
. Note: Integers must be in the
range 0 to getViewTypeCount()
- 1. IGNORE_ITEM_VIEW_TYPE
can
also be returned.
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 when the adapter is set on the
the AdapterView
.
Indicates whether the item ids are stable across changes to the underlying data.
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.
position | Index of the item |
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Notifies the attached observers that the underlying data has been changed and any View reflecting the data set should refresh itself.
Notifies the attached observers that the underlying data is no longer valid or available. Once invoked this adapter is no longer valid and should not report further data set changes.
Register an observer that is called when changes happen to the data used by this adapter.
observer | the object that gets notified when the data set changes. |
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Unregister an observer that has previously been registered with this
adapter via registerDataSetObserver(DataSetObserver)
.
observer | the object to unregister. |
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