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Added in API level 1

Summary: Inherited Constants | Ctors | Methods | Inherited Methods | [Expand All]

ArrayAdapter

public class ArrayAdapter
extends BaseAdapter implements Filterable, ThemedSpinnerAdapter

java.lang.Object
↳	android.widget.BaseAdapter
	↳	android.widget.ArrayAdapter<T>

A concrete BaseAdapter that is backed by an array of arbitrary objects. By default this class expects that the provided resource id references a single TextView. If you want to use a more complex layout, use the constructors that also takes a field id. That field id should reference a TextView in the larger layout resource.

However the TextView is referenced, it will be filled with the toString() of each object in the array. You can add lists or arrays of custom objects. Override the toString() method of your objects to determine what text will be displayed for the item in the list.

To use something other than TextViews for the array display, for instance, ImageViews, or to have some of data besides toString() results fill the views, override getView(int, View, ViewGroup) to return the type of view you want.

Summary

Inherited constants

From interface


    android.widget.Adapter

Public constructors
`ArrayAdapter(Context context, int resource)` Constructor
`ArrayAdapter(Context context, int resource, int textViewResourceId)` Constructor
`ArrayAdapter(Context context, int resource, T[] objects)` Constructor
`ArrayAdapter(Context context, int resource, int textViewResourceId, T[] objects)` Constructor
`ArrayAdapter(Context context, int resource, List<T> objects)` Constructor
`ArrayAdapter(Context context, int resource, int textViewResourceId, List<T> objects)` Constructor

Public methods
`void`	`add(T object)` Adds the specified object at the end of the array.
`void`	`addAll(T... items)` Adds the specified items at the end of the array.
`void`	`addAll(Collection<? extends T> collection)` Adds the specified Collection at the end of the array.
`void`	`clear()` Remove all elements from the list.
`static ArrayAdapter<CharSequence>`	`createFromResource(Context context, int textArrayResId, int textViewResId)` Creates a new ArrayAdapter from external resources.
`Context`	`getContext()` Returns the context associated with this array adapter.
`int`	`getCount()` How many items are in the data set represented by this Adapter.
`View`	`getDropDownView(int position, View convertView, ViewGroup parent)` Gets a `View` that displays in the drop down popup the data at the specified position in the data set.
`Resources.Theme`	`getDropDownViewTheme()` Returns the value previously set by a call to `setDropDownViewTheme(Theme)`.
`Filter`	`getFilter()` Returns a filter that can be used to constrain data with a filtering pattern.
`T`	`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`	`getPosition(T item)` Returns the position of the specified item in the array.
`View`	`getView(int position, View convertView, ViewGroup parent)` Get a View that displays the data at the specified position in the data set.
`void`	`insert(T object, int index)` Inserts the specified object at the specified index in the array.
`void`	`notifyDataSetChanged()` Notifies the attached observers that the underlying data has been changed and any View reflecting the data set should refresh itself.
`void`	`remove(T object)` Removes the specified object from the array.
`void`	`setDropDownViewResource(int resource)` Sets the layout resource to create the drop down views.
`void`	`setDropDownViewTheme(Resources.Theme theme)` Sets the `Resources.Theme` against which drop-down views are inflated.
`void`	`setNotifyOnChange(boolean notifyOnChange)` Control whether methods that change the list (`add(T)`, `insert(T, int)`, `remove(T)`, `clear()`) automatically call `notifyDataSetChanged()`.
`void`	`sort(Comparator<? super T> comparator)` Sorts the content of this adapter using the specified comparator.

Inherited methods

From class


  
    android.widget.BaseAdapter

`boolean`	`areAllItemsEnabled()` Indicates whether all the items in this adapter are enabled.
`View`	`getDropDownView(int position, View convertView, ViewGroup parent)` Gets a `View` that displays in the drop down popup the data at the specified position in the data set.
`int`	`getItemViewType(int position)` Get the type of View that will be created by `getView(int, View, ViewGroup)` for the specified item.
`int`	`getViewTypeCount()` Returns the number of types of Views that will be created by `getView(int, View, ViewGroup)`.
`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`	`notifyDataSetChanged()` Notifies the attached observers that the underlying data has been changed and any View reflecting the data set should refresh itself.
`void`	`notifyDataSetInvalidated()` Notifies the attached observers that the underlying data is no longer valid or available.
`void`	`registerDataSetObserver(DataSetObserver observer)` Register an observer that is called when changes happen to the data used by this adapter.
`void`	`unregisterDataSetObserver(DataSetObserver observer)` Unregister an observer that has previously been registered with this adapter via `registerDataSetObserver(DataSetObserver)`.

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 millis, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long millis)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

From interface


  
    android.widget.ListAdapter

From interface


  
    android.widget.SpinnerAdapter

From interface


  
    android.widget.Filterable

From interface


  
    android.widget.ThemedSpinnerAdapter

From interface


  
    android.widget.Adapter

`abstract int`	`getCount()` How many items are in the data set represented by this Adapter.
`abstract Object`	`getItem(int position)` Get the data item associated with the specified position in the data set.
`abstract long`	`getItemId(int position)` Get the row id associated with the specified position in the list.
`abstract int`	`getItemViewType(int position)` Get the type of View that will be created by `getView(int, View, ViewGroup)` for the specified item.
`abstract View`	`getView(int position, View convertView, ViewGroup parent)` Get a View that displays the data at the specified position in the data set.
`abstract int`	`getViewTypeCount()` Returns the number of types of Views that will be created by `getView(int, View, ViewGroup)`.
`abstract boolean`	`hasStableIds()` Indicates whether the item ids are stable across changes to the underlying data.
`abstract boolean`	`isEmpty()`
`abstract void`	`registerDataSetObserver(DataSetObserver observer)` Register an observer that is called when changes happen to the data used by this adapter.
`abstract void`	`unregisterDataSetObserver(DataSetObserver observer)` Unregister an observer that has previously been registered with this adapter via `registerDataSetObserver(DataSetObserver)`.

Public constructors

ArrayAdapter

Added in API level 1

ArrayAdapter (Context context, 
                int resource)

Constructor

Parameters
`context`	`Context`: The current context.
`resource`	`int`: The resource ID for a layout file containing a TextView to use when instantiating views.

ArrayAdapter

Added in API level 1

ArrayAdapter (Context context, 
                int resource, 
                int textViewResourceId)

Constructor

Parameters
`context`	`Context`: The current context.
`resource`	`int`: The resource ID for a layout file containing a layout to use when instantiating views.
`textViewResourceId`	`int`: The id of the TextView within the layout resource to be populated

ArrayAdapter

Added in API level 1

ArrayAdapter (Context context, 
                int resource, 
                T[] objects)

Constructor

Parameters
`context`	`Context`: The current context.
`resource`	`int`: The resource ID for a layout file containing a TextView to use when instantiating views.
`objects`	`T`: The objects to represent in the ListView.

ArrayAdapter

Added in API level 1

ArrayAdapter (Context context, 
                int resource, 
                int textViewResourceId, 
                T[] objects)

Constructor

Parameters
`context`	`Context`: The current context.
`resource`	`int`: The resource ID for a layout file containing a layout to use when instantiating views.
`textViewResourceId`	`int`: The id of the TextView within the layout resource to be populated
`objects`	`T`: The objects to represent in the ListView.

ArrayAdapter

Added in API level 1

ArrayAdapter (Context context, 
                int resource, 
                List<T> objects)

Constructor

Parameters
`context`	`Context`: The current context.
`resource`	`int`: The resource ID for a layout file containing a TextView to use when instantiating views.
`objects`	`List`: The objects to represent in the ListView.

ArrayAdapter

Added in API level 1

ArrayAdapter (Context context, 
                int resource, 
                int textViewResourceId, 
                List<T> objects)

Constructor

Parameters
`context`	`Context`: The current context.
`resource`	`int`: The resource ID for a layout file containing a layout to use when instantiating views.
`textViewResourceId`	`int`: The id of the TextView within the layout resource to be populated
`objects`	`List`: The objects to represent in the ListView.

Public methods

add

Added in API level 1

void add (T object)

Adds the specified object at the end of the array.

Parameters
`object`	`T`: The object to add at the end of the array.

addAll

Added in API level 11

void addAll (T... items)

Adds the specified items at the end of the array.

Parameters
`items`	`T`: The items to add at the end of the array.

addAll

Added in API level 11

void addAll (Collection<? extends T> collection)

Adds the specified Collection at the end of the array.

Parameters
`collection`	`Collection`: The Collection to add at the end of the array.

Throws
`UnsupportedOperationException`	if the `addAll` operation is not supported by this list
`ClassCastException`	if the class of an element of the specified collection prevents it from being added to this list
`NullPointerException`	if the specified collection contains one or more null elements and this list does not permit null elements, or if the specified collection is null
`IllegalArgumentException`	if some property of an element of the specified collection prevents it from being added to this list

clear

Added in API level 1

void clear ()

Remove all elements from the list.

createFromResource

Added in API level 1

ArrayAdapter<CharSequence> createFromResource (Context context, 
                int textArrayResId, 
                int textViewResId)

Creates a new ArrayAdapter from external resources. The content of the array is obtained through getTextArray(int).

Parameters
`context`	`Context`: The application's environment.
`textArrayResId`	`int`: The identifier of the array to use as the data source.
`textViewResId`	`int`: The identifier of the layout used to create views.

Returns
`ArrayAdapter<CharSequence>`	An ArrayAdapter.

getContext

Added in API level 1

Context getContext ()

Returns the context associated with this array adapter. The context is used to create views from the resource passed to the constructor.

Returns
`Context`	The Context associated with this adapter.

getCount

Added in API level 1

int getCount ()

How many items are in the data set represented by this Adapter.

Returns
`int`	Count of items.

getDropDownView

Added in API level 1

View getDropDownView (int position, 
                View convertView, 
                ViewGroup parent)

Gets a View that displays in the drop down popup the data at the specified position in the data set.

Parameters
`position`	`int`: index 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.
`parent`	`ViewGroup`: the parent that this view will eventually be attached to

Returns
`View`	a `View` corresponding to the data at the specified position.

getDropDownViewTheme

Added in API level 23

Resources.Theme getDropDownViewTheme ()

Returns the value previously set by a call to setDropDownViewTheme(Theme).

Returns
`Resources.Theme`	the `Resources.Theme` against which drop-down views are inflated, or `null` if one has not been explicitly set

getFilter

Added in API level 1

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

getItem

Added in API level 1

T 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
`T`	The data at the specified position.

getItemId

Added in API level 1

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.

getPosition

Added in API level 1

int getPosition (T item)

Returns the position of the specified item in the array.

Parameters
`item`	`T`: The item to retrieve the position of.

Returns
`int`	The position of the specified item.

getView

Added in API level 1

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.

insert

Added in API level 1

void insert (T object, 
                int index)

Inserts the specified object at the specified index in the array.

Parameters
`object`	`T`: The object to insert into the array.
`index`	`int`: The index at which the object must be inserted.

notifyDataSetChanged

Added in API level 1

void notifyDataSetChanged ()

Notifies the attached observers that the underlying data has been changed and any View reflecting the data set should refresh itself.

remove

Added in API level 1

void remove (T object)

Removes the specified object from the array.

Parameters
`object`	`T`: The object to remove.

setDropDownViewResource

Added in API level 1

void setDropDownViewResource (int resource)

Sets the layout resource to create the drop down views.

Parameters
`resource`	`int`: the layout resource defining the drop down views

See also:

getDropDownView(int, android.view.View, android.view.ViewGroup)

setDropDownViewTheme

Added in API level 23

void setDropDownViewTheme (Resources.Theme theme)

Sets the Resources.Theme against which drop-down views are inflated.

By default, drop-down views are inflated against the theme of the Context passed to the adapter's constructor.

Parameters
`theme`	`Resources.Theme`: the theme against which to inflate drop-down views or `null` to use the theme from the adapter's context

See also:

getDropDownView(int, View, ViewGroup)

setNotifyOnChange

Added in API level 1

void setNotifyOnChange (boolean notifyOnChange)

Control whether methods that change the list (add(T), insert(T, int), remove(T), clear()) automatically call notifyDataSetChanged(). If set to false, caller must manually call notifyDataSetChanged() to have the changes reflected in the attached view. The default is true, and calling notifyDataSetChanged() resets the flag to true.

Parameters
`notifyOnChange`	`boolean`: if true, modifications to the list will automatically call `notifyDataSetChanged()`

sort

Added in API level 3

void sort (Comparator<? super T> comparator)

Sorts the content of this adapter using the specified comparator.

Parameters
`comparator`	`Comparator`: The comparator used to sort the objects contained in this adapter.