public
class
WindowId
extends Object
implements
Parcelable
| java.lang.Object | |
| ↳ | android.view.WindowId |
Safe identifier for a window. This currently allows you to retrieve and observe
the input focus state of the window. Most applications will
not use this, instead relying on the simpler (and more efficient) methods available
on View. This classes is useful when window input interactions need to be
done across processes: the class itself is a Parcelable that can be passed to other
processes for them to interact with your window, and it provides a limited safe API
that doesn't allow the other process to negatively harm your window.
Nested classes | |
|---|---|
class |
WindowId.FocusObserver
Subclass for observing changes to the focus state of an |
Inherited constants |
|---|
 From
interface
android.os.Parcelable
|
Fields | |
|---|---|
public
static
final
Creator<WindowId> |
CREATOR
|
Public methods | |
|---|---|
int
|
describeContents()
Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. |
boolean
|
equals(Object otherObj)
Comparison operator on two IntentSender objects, such that true is returned then they both represent the same operation from the same package. |
int
|
hashCode()
Returns a hash code value for the object. |
boolean
|
isFocused()
Retrieve the current focus state of the associated window. |
void
|
registerFocusObserver(WindowId.FocusObserver observer)
Start monitoring for changes in the focus state of the window. |
String
|
toString()
Returns a string representation of the object. |
void
|
unregisterFocusObserver(WindowId.FocusObserver observer)
Stop monitoring changes in the focus state of the window. |
void
|
writeToParcel(Parcel out, int flags)
Flatten this object in to a Parcel. |
Inherited methods | |
|---|---|
From
class
java.lang.Object
| |
From
interface
android.os.Parcelable
| |
int describeContents ()
Describe the kinds of special objects contained in this Parcelable
instance's marshaled representation. For example, if the object will
include a file descriptor in the output of writeToParcel(Parcel, int),
the return value of this method must include the
CONTENTS_FILE_DESCRIPTOR bit.
| Returns | |
|---|---|
int |
a bitmask indicating the set of special object types marshaled by this Parcelable object instance. |
boolean equals (Object otherObj)
Comparison operator on two IntentSender objects, such that true is returned then they both represent the same operation from the same package.
| Parameters | |
|---|---|
otherObj |
Object:
the reference object with which to compare. |
| Returns | |
|---|---|
boolean |
true if this object is the same as the obj
argument; false otherwise. |
int hashCode ()
Returns a hash code value for the object. This method is
supported for the benefit of hash tables such as those provided by
HashMap.
The general contract of hashCode is:
Developers
hashCode method
must consistently return the same integer, provided no information
used in equals comparisons on the object is modified.
This integer need not remain consistent from one execution of an
application to another execution of the same application.
equals(Object)
method, then calling the hashCode method on each of
the two objects must produce the same integer result.
equals(java.lang.Object)
method, then calling the hashCode method on each of the
two objects must produce distinct integer results. However, the
programmer should be aware that producing distinct integer results
for unequal objects may improve the performance of hash tables.
As much as is reasonably practical, the hashCode method defined by
class Object does return distinct integers for distinct
objects. (This is typically implemented by converting the internal
address of the object into an integer, but this implementation
technique is not required by the
JavaTM programming language.)
| Returns | |
|---|---|
int |
a hash code value for this object. |
boolean isFocused ()
Retrieve the current focus state of the associated window.
| Returns | |
|---|---|
boolean |
|
void registerFocusObserver (WindowId.FocusObserver observer)
Start monitoring for changes in the focus state of the window.
| Parameters | |
|---|---|
observer |
WindowId.FocusObserver
|
String toString ()
Returns a string representation of the object. In general, the
toString method returns a string that
"textually represents" this object. The result should
be a concise but informative representation that is easy for a
person to read.
It is recommended that all subclasses override this method.
The toString method for class Object
returns a string consisting of the name of the class of which the
object is an instance, the at-sign character `@', and
the unsigned hexadecimal representation of the hash code of the
object. In other words, this method returns a string equal to the
value of:
getClass().getName() + '@' + Integer.toHexString(hashCode())
| Returns | |
|---|---|
String |
a string representation of the object. |
void unregisterFocusObserver (WindowId.FocusObserver observer)
Stop monitoring changes in the focus state of the window.
| Parameters | |
|---|---|
observer |
WindowId.FocusObserver
|
void writeToParcel (Parcel out, int flags)
Flatten this object in to a Parcel.
| Parameters | |
|---|---|
out |
Parcel:
The Parcel in which the object should be written. |
flags |
int:
Additional flags about how the object should be written.
May be 0 or PARCELABLE_WRITE_RETURN_VALUE.
|