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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>

具有任意对象数组支持的具体BaseAdapter。默认情况下，这个类期望提供的资源id引用单个TextView。如果您想使用更复杂的布局，请使用也需要字段ID的构造函数。该字段ID应在较大的布局资源中引用TextView。

然而，TextView被引用，它将被填充数组中每个对象的toString（）。您可以添加自定义对象的列表或数组。重写对象的toString（）方法以确定列表中的项目将显示哪些文本。

要使用TextView以外的其他数据显示（例如ImageViews）或除了toString（）结果之外还有一些数据填充视图，请覆盖 getView(int, View, ViewGroup)以返回所需的视图类型。

Summary

Inherited constants

From interface android.widget.Adapter

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

Public methods
`void`	`add(T object)` 在数组的末尾添加指定的对象。
`void`	`addAll(T... items)` 在数组末尾添加指定的项目。
`void`	`addAll(Collection<? extends T> collection)` 在数组末尾添加指定的Collection。
`void`	`clear()` 删除列表中的所有元素。
`static ArrayAdapter<CharSequence>`	`createFromResource(Context context, int textArrayResId, int textViewResId)` 从外部资源创建一个新的ArrayAdapter。
`Context`	`getContext()` 返回与此阵列适配器关联的上下文。
`int`	`getCount()` 本适配器所代表的数据集中有多少项目。
`View`	`getDropDownView(int position, View convertView, ViewGroup parent)` 获取一个 `View` ，它在下拉式弹出 `View`中显示数据集中指定位置的数据。
`Resources.Theme`	`getDropDownViewTheme()` 返回以前通过调用 `setDropDownViewTheme(Theme)`设置的值。
`Filter`	`getFilter()` 返回可用于使用过滤模式约束数据的过滤器。
`T`	`getItem(int position)` 获取与数据集中指定位置关联的数据项。
`long`	`getItemId(int position)` 获取与列表中指定位置关联的行ID。
`int`	`getPosition(T item)` 返回数组中指定项目的位置。
`View`	`getView(int position, View convertView, ViewGroup parent)` 获取显示数据集中指定位置的数据的视图。
`void`	`insert(T object, int index)` 将指定的对象插入数组中的指定索引处。
`void`	`notifyDataSetChanged()` 通知附属的观察者，底层数据已被更改，任何反映数据集的视图都应该自行刷新。
`void`	`remove(T object)` 从数组中删除指定的对象。
`void`	`setDropDownViewResource(int resource)` 设置布局资源以创建下拉视图。
`void`	`setDropDownViewTheme(Resources.Theme theme)` 设置 `Resources.Theme`针对哪个下拉视图被夸大。
`void`	`setNotifyOnChange(boolean notifyOnChange)` 控制是否该改变列表的方法（ `add(T)` ， `insert(T, int)` ， `remove(T)` ， `clear()` ）自动调用 `notifyDataSetChanged()` 。
`void`	`sort(Comparator<? super T> comparator)` 使用指定的比较器对此适配器的内容进行排序。

Inherited methods

From class android.widget.BaseAdapter

From class java.lang.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

Public constructors

ArrayAdapter

Added in API level 1

ArrayAdapter (Context context, 
                int resource)

构造函数

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)

构造函数

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)

构造函数

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)

构造函数

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)

构造函数

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)

构造函数

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)

在数组的末尾添加指定的对象。

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

addAll

Added in API level 11

void addAll (T... items)

在数组末尾添加指定的项目。

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)

在数组末尾添加指定的Collection。

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 ()

删除列表中的所有元素。

createFromResource

Added in API level 1

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

从外部资源创建一个新的ArrayAdapter。数组的内容通过getTextArray(int)获得。

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 ()

返回与此阵列适配器关联的上下文。上下文用于从传递给构造函数的资源创建视图。

Returns
`Context`	The Context associated with this adapter.

getCount

Added in API level 1

int getCount ()

本适配器所代表的数据集中有多少项目。

Returns
`int`	Count of items.

getDropDownView

Added in API level 1

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

获取一个 View ，它在下拉式弹出 View中显示数据集中指定位置的数据。

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 ()

返回以前通过调用 setDropDownViewTheme(Theme)设置的值。

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 ()

返回可用于使用过滤模式约束数据的过滤器。

该方法通常由 Adapter类实现。

Returns
`Filter`	a filter used to constrain data

getItem

Added in API level 1

T getItem (int position)

获取与数据集中指定位置关联的数据项。

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)

获取与列表中指定位置关联的行ID。

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)

返回数组中指定项目的位置。

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)

获取显示数据集中指定位置的数据的视图。您可以手动创建视图或从XML布局文件中对其进行膨胀。当视图膨胀时，父视图（GridView，ListView ...）将应用默认布局参数，除非您使用inflate(int, android.view.ViewGroup, boolean)来指定根视图并防止附加到根。

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)

将指定的对象插入数组中的指定索引处。

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 ()

通知附属的观察者，底层数据已被更改，任何反映数据集的视图都应该自行刷新。

remove

Added in API level 1

void remove (T object)

从数组中删除指定的对象。

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

setDropDownViewResource

Added in API level 1

void setDropDownViewResource (int resource)

设置布局资源以创建下拉视图。

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

也可以看看：

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

setDropDownViewTheme

Added in API level 23

void setDropDownViewTheme (Resources.Theme theme)

设置 Resources.Theme ，下拉视图被 Resources.Theme 。

默认情况下，下拉视图会根据传递给适配器构造函数的 Context的主题进行膨胀。

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

也可以看看：

getDropDownView(int, View, ViewGroup)

setNotifyOnChange

Added in API level 1

void setNotifyOnChange (boolean notifyOnChange)

控制是否该改变列表的方法（ add(T) ， insert(T, int) ， remove(T) ， clear() ）自动调用notifyDataSetChanged() 。如果设置为false，调用者必须手动调用notifyDataSetChanged（）以使所做的更改反映在所附视图中。默认值为true，并调用notifyDataSetChanged（）将该标志重置为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)

使用指定的比较器对此适配器的内容进行排序。

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