UiSelector的官方帮助文档

转：https://developer.android.com/reference/android/support/test/uiautomator/UiSelector.html

UiSelector

public class UiSelector 

extends Object 

java.lang.Object
↳	android.support.test.uiautomator.UiSelector

Specifies the elements in the layout hierarchy for tests to target, filtered by properties such as text value, content-description, class name, and state information. You can also target an element by its location
in a layout hierarchy.

Summary

Public constructors
UiSelector()

Public methods
UiSelector	checkable(boolean val) Set the search criteria to match widgets that are checkable.
UiSelector	checked(boolean val) Set the search criteria to match widgets  that are currently checked (usually for checkboxes).
UiSelector	childSelector(UiSelector selector) Adds a child UiSelector criteria to this selector.
UiSelector	className(String className) Set the search criteria to match the class property for a widget  (for example, "android.widget.Button").
<T>UiSelector	className(Class<T> type) Set the search criteria to match the class property for a widget  (for example, "android.widget.Button").
UiSelector	classNameMatches(String regex) Set the search criteria to match the class property for a widget,  using a regular expression.
UiSelector	clickable(boolean val) Set the search criteria to match widgets that are clickable.
UiSelector	description(String desc) Set the search criteria to match the content-description property  for a widget.
UiSelector	descriptionContains(String desc) Set the search criteria to match the content-description property  for a widget.
UiSelector	descriptionMatches(String regex) Set the search criteria to match the content-description property  for a widget.
UiSelector	descriptionStartsWith(String desc) Set the search criteria to match the content-description property  for a widget.
UiSelector	enabled(boolean val) Set the search criteria to match widgets that are enabled.
UiSelector	focusable(boolean val) Set the search criteria to match widgets that are focusable.
UiSelector	focused(boolean val) Set the search criteria to match widgets that have focus.
UiSelector	fromParent(UiSelector selector) Adds a child UiSelector criteria to this selector  which is used to start search from the parent widget.
UiSelector	index(int index) Set the search criteria to match the widget  by its node index in the layout hierarchy.
UiSelector	instance(int instance) Set the search criteria to match the widget  by its instance number.
UiSelector	longClickable(boolean val) Set the search criteria to match widgets  that are long-clickable.
UiSelector	packageName(String name) Set the search criteria to match the package name  of the application that contains the widget.
UiSelector	packageNameMatches(String regex) Set the search criteria to match the package name  of the application that contains the widget.
UiSelector	resourceId(String id) Set the search criteria to match the given resource ID.
UiSelector	resourceIdMatches(String regex) Set the search criteria to match the resource ID  of the widget, using a regular expression.
UiSelector	scrollable(boolean val) Set the search criteria to match widgets  that are scrollable.
UiSelector	selected(boolean val) Set the search criteria to match widgets  that are currently selected.
UiSelector	text(String text) Set the search criteria to match the visible text  displayed in a widget  (for example, the text label to launch an app).
UiSelector	textContains(String text) Set the search criteria to match the visible text  in a widget where the visible text must contain the string  in your input argument.
UiSelector	textMatches(String regex) Set the search criteria to match the visible text  displayed in a layout element, using a regular expression.
UiSelector	textStartsWith(String text) Set the search criteria to match visible text in a widget  that is prefixed by the text parameter.
String	toString()

Protected methods
UiSelector	cloneSelector()

Inherited methods
From class  java.lang.Object

Public constructors

UiSelector

UiSelector ()

Public methods

checkable

UiSelector checkable (boolean val)

Set the search criteria to match widgets that are checkable. Typically, using this search criteria alone is not useful. You should also include additional criteria, such as text, 
content-description, or the class name for a widget. If no other search criteria is specified, and there is more than one matching widget, the first widget in the tree is selected.

Parameters
val	boolean : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

checked

UiSelector checked (boolean val)

Set the search criteria to match widgets that are currently checked (usually for checkboxes). Typically, using this search criteria alone is not useful. You should also include 
additional criteria, such as text, content-description, or the class name for a widget. If no other search criteria is specified, and there is more than one matching widget,
 the first widget in the tree is selected.

Parameters
val	boolean : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

childSelector

UiSelector childSelector (UiSelector selector)

Adds a child UiSelector criteria to this selector. Use this selector to narrow the search scope to child widgets under a specific parent widget.

Returns
UiSelector	UiSelector with this added search criterion

className

UiSelector className (String className)

Set the search criteria to match the class property for a widget (for example, "android.widget.Button").

Parameters
className	String : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

className

UiSelector className (Class<T> type)

Set the search criteria to match the class property for a widget 
(for example, "android.widget.Button").

Parameters
type	Class : type

Returns
UiSelector	UiSelector with the specified search criteria

classNameMatches

UiSelector classNameMatches (String regex)

Set the search criteria to match the class property for a widget, 
using a regular expression.

Parameters
regex	String : a regular expression

Returns
UiSelector	UiSelector with the specified search criteria

clickable

UiSelector clickable (boolean val)

Set the search criteria to match widgets that are clickable. Typically, using this search criteria alone is not useful. You should also include additional criteria, such as text,
 content-description, or the class name for a widget. If no other search criteria is specified, and there is more than one matching widget, the first widget in the tree is selected.

Parameters
val	boolean : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

description

UiSelector description (String desc)

Set the search criteria to match the content-description property for a widget. The content-description is typically used by the Android Accessibility framework to provide an 
audio prompt for the widget when the widget is selected. The content-description for the widget must match exactly with the string in your input argument. Matching is 
case-sensitive.

Parameters
desc	String : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

descriptionContains

UiSelector descriptionContains (String desc)

Set the search criteria to match the content-description property for a widget. The content-description is typically used by the Android Accessibility framework to provide an 
audio prompt for the widget when the widget is selected. The content-description for the widget must contain the string in your input argument. Matching is case-insensitive.

Parameters
desc	String : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

descriptionMatches

UiSelector descriptionMatches (String regex)

Set the search criteria to match the content-description property for a widget. The content-description is typically used by the Android Accessibility framework to provide an
 audio prompt for the widget when the widget is selected. The content-description for the widget must match exactly with the string in your input argument.

Parameters
regex	String : a regular expression

Returns
UiSelector	UiSelector with the specified search criteria

descriptionStartsWith

UiSelector descriptionStartsWith (String desc)

Set the search criteria to match the content-description property for a widget. The content-description is typically used by the Android Accessibility framework to provide an 
audio prompt for the widget when the widget is selected. The content-description for the widget must start with the string in your input argument. Matching is case-insensitive.

Parameters
desc	String : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

enabled

UiSelector enabled (boolean val)

Set the search criteria to match widgets that are enabled. Typically, using this search criteria alone is not useful. You should also include additional criteria, such as text, 
content-description, or the class name for a widget. If no other search criteria is specified, and there is more than one matching widget, the first widget in the tree is selected.

Parameters
val	boolean : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

focusable

UiSelector focusable (boolean val)

Set the search criteria to match widgets that are focusable. Typically, using this search criteria alone is not useful. You should also include additional criteria, such as text, 
content-description, or the class name for a widget. If no other search criteria is specified, and there is more than one matching widget, the first widget in the tree is selected.

Parameters
val	boolean : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

focused

UiSelector focused (boolean val)

Set the search criteria to match widgets that have focus. Typically, using this search criteria alone is not useful. You should also include additional criteria, such as text,
 content-description, or the class name for a widget. If no other search criteria is specified, and there is more than one matching widget, the first widget in the tree is selected.

Parameters
val	boolean : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

fromParent

UiSelector fromParent (UiSelector selector)

Adds a child UiSelector criteria to this selector which is used to start search from the parent widget. Use this selector to narrow the search scope to sibling widgets as well
 all child widgets under a parent.

Returns
UiSelector	UiSelector with this added search criterion

index

UiSelector index (int index)

Set the search criteria to match the widget by its node index in the layout hierarchy. The index value must be 0 or greater. Using the index can be unreliable and should only
 be used as a last resort for matching. Instead, consider using the 

instance(int)

 method.

Parameters
index	int : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

instance

UiSelector instance (int instance)

Set the search criteria to match the widget by its instance number. The instance value must be 0 or greater, where the first instance is 0. For example, to simulate a user click
 on the third image that is enabled in a UI screen, you could specify a a search criteria where the instance is 2, the 

className(String)

 matches
the image widget class, 
and 

enabled(boolean)

 is
true. The code would look like this: 

new UiSelector().className("android.widget.ImageView") .enabled(true).instance(2);

Parameters
instance	int : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

longClickable

UiSelector longClickable (boolean val)

Set the search criteria to match widgets that are long-clickable. Typically, using this search criteria alone is not useful. You should also include additional criteria, such as
 text, content-description, or the class name for a widget. If no other search criteria is specified, and there is more than one matching widget, the first widget in the tree is
 selected.

Parameters
val	boolean : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

packageName

UiSelector packageName (String name)

Set the search criteria to match the package name of the application that contains the widget.

Parameters
name	String : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

packageNameMatches

UiSelector packageNameMatches (String regex)

Set the search criteria to match the package name of the application that contains the widget.

Parameters
regex	String : a regular expression

Returns
UiSelector	UiSelector with the specified search criteria

resourceId

UiSelector resourceId (String id)

Set the search criteria to match the given resource ID.

Parameters
id	String : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

resourceIdMatches

UiSelector resourceIdMatches (String regex)

Set the search criteria to match the resource ID of the widget, using a regular expression.

Parameters
regex	String : a regular expression

Returns
UiSelector	UiSelector with the specified search criteria

scrollable

UiSelector scrollable (boolean val)

Set the search criteria to match widgets that are scrollable. Typically, using this search criteria alone is not useful. You should also include additional criteria, such as text,
 content-description, or the class name for a widget. If no other search criteria is specified, and there is more than one matching widget, the first widget in the tree is selected.

Parameters
val	boolean : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

selected

UiSelector selected (boolean val)

Set the search criteria to match widgets that are currently selected. Typically, using this search criteria alone is not useful. You should also include additional criteria, 
such as text, content-description, or the class name for a widget. If no other search criteria is specified, and there is more than one matching widget, the first widget in 
the tree is selected.

Parameters
val	boolean : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

text

UiSelector text (String text)

Set the search criteria to match the visible text displayed in a widget (for example, the text label to launch an app). The text for the element must match exactly with the string
 in your input argument. Matching is case-sensitive.

Parameters
text	String : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

textContains

UiSelector textContains (String text)

Set the search criteria to match the visible text in a widget where the visible text must contain the string in your input argument. The matching is case-sensitive.

Parameters
text	String : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

textMatches

UiSelector textMatches (String regex)

Set the search criteria to match the visible text displayed in a layout element, using a regular expression. The text in the widget must match exactly with the string in your input
 argument.

Parameters
regex	String : a regular expression

Returns
UiSelector	UiSelector with the specified search criteria

textStartsWith

UiSelector textStartsWith (String text)

Set the search criteria to match visible text in a widget that is prefixed by the text parameter. The matching is case-insensitive.

Parameters
text	String : Value to match

Returns
UiSelector	UiSelector with the specified search criteria

toString

String toString ()

Returns
String

Protected methods

cloneSelector

UiSelector cloneSelector ()

Returns
UiSelector