Android
android.widget
public class

android.widget.ArrayAdapter<T>

java.lang.Object
android.widget.BaseAdapter ListAdapter SpinnerAdapter
android.widget.ArrayAdapter<T> Filterable

A ListAdapter that manages a ListView backed by an array of arbitrary objects. By default this class expects that the provided resource id referecnes 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

Constants inherited from interface android.widget.Adapter

Public Constructors

            ArrayAdapter(Context context, int textViewResourceId)
Constructor
            ArrayAdapter(Context context, int resource, int textViewResourceId)
Constructor
            ArrayAdapter(Context context, int textViewResourceId, T[] objects)
Constructor
            ArrayAdapter(Context context, int resource, int textViewResourceId, T[] objects)
Constructor
            ArrayAdapter(Context context, int textViewResourceId, 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  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()
          View  getDropDownView(int position, View convertView, ViewGroup parent)

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

          Filter  getFilter()

Returns a filter that can be used to constrain data with a filtering pattern.

          getItem(int position)
          long  getItemId(int position)
          int  getPosition(T item)
Returns the position of the specified item in the array.
          View  getView(int position, View convertView, ViewGroup parent)
          void  insert(T object, int index)
Inserts the spcified object at the specified index in the array.
          void  notifyDataSetChanged()
          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  setNotifyOnChange(boolean notifyOnChange)
Control whether methods that change the list (add(T), insert(T, int), remove(T), clear()) automatically call notifyDataSetChanged().
Methods inherited from class android.widget.BaseAdapter
Methods inherited from class java.lang.Object
Methods inherited from interface android.widget.Adapter
Methods inherited from interface android.widget.Filterable
Methods inherited from interface android.widget.ListAdapter
Methods inherited from interface android.widget.SpinnerAdapter

Details

Public Constructors

public ArrayAdapter(Context context, int textViewResourceId)

Constructor

Parameters

context The current context.
textViewResourceId The resource ID for a layout file containing a TextView to use when instantiating views.

public ArrayAdapter(Context context, int resource, int textViewResourceId)

Constructor

Parameters

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

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

Constructor

Parameters

context The current context.
textViewResourceId The resource ID for a layout file containing a TextView to use when instantiating views.
objects The objects to represent in the ListView.

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

Constructor

Parameters

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

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

Constructor

Parameters

context The current context.
textViewResourceId The resource ID for a layout file containing a TextView to use when instantiating views.
objects The objects to represent in the ListView.

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

Constructor

Parameters

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

Public Methods

public void add(T object)

Adds the specified object at the end of the array.

Parameters

object The object to add at the end of the array.

public void clear()

Remove all elements from the list.

public static 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 The application's environment.
textArrayResId The identifier of the array to use as the data source.
textViewResId The identifier of the layout used to create views.

Returns

  • An ArrayAdapter.

public 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

  • The Context associated with this adapter.

public int getCount()

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

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

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.

public T getItem(int position)

public long getItemId(int position)

public int getPosition(T item)

Returns the position of the specified item in the array.

Parameters

item The item to retrieve the position of.

Returns

  • The position of the specified item.

public View getView(int position, View convertView, ViewGroup parent)

public void insert(T object, int index)

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

Parameters

object The object to insert into the array.
index The index at which the object must be inserted.

public void notifyDataSetChanged()

public void remove(T object)

Removes the specified object from the array.

Parameters

object The object to remove.

public void setDropDownViewResource(int resource)

Sets the layout resource to create the drop down views.

Parameters

resource the layout resource defining the drop down views

public 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 if true, modifications to the list will automatically call notifyDataSetChanged()
Copyright 2007 Google Inc. Build 0.9_r1-98467 - 14 Aug 2008 18:48