public class ResourceRequestKey extends Object implements RequestKey
RequestKey.Callback, RequestKey.Cancelable, RequestKey.FileDescriptorFactory
Modifier and Type | Method and Description |
---|---|
RequestKey.Cancelable |
createFileDescriptorFactoryAsync(RequestKey requestKey,
RequestKey.Callback callback)
Create an
RequestKey.FileDescriptorFactory for a local file stored on the device and pass it to
the given callback. |
InputStream |
createInputStream()
Create an
InputStream for the source. |
boolean |
equals(Object o)
Indicates whether some other object is "equal to" this one.
|
static ResourceRequestKey |
from(Resources res,
int resId)
Create a new request key with the given resource id.
|
int |
hashCode()
Returns a hash code value for the object.
|
boolean |
hasOrientationExif()
Return true if the image source may have be oriented in either portrait or landscape, and
will need to be automatically re-oriented based on accompanying Exif metadata.
|
String |
toString()
Returns a string representation of the object.
|
public static ResourceRequestKey from(Resources res, int resId)
public RequestKey.Cancelable createFileDescriptorFactoryAsync(RequestKey requestKey, RequestKey.Callback callback)
RequestKey
RequestKey.FileDescriptorFactory
for a local file stored on the device and pass it to
the given callback. This method will be called in favor of RequestKey.createInputStream()
},
which will only be called if null is returned from this method,
or Callback#fileDescriptorFactoryCreated(RequestKey, FileDescriptorFactory)
is called
with a null FileDescriptorFactory.
Clients should implement this method if files are in the local cache folder, or if files must
be downloaded and cached.
This method must be called from the UI thread.createFileDescriptorFactoryAsync
in interface RequestKey
requestKey
- The key to create a FileDescriptorFactory for. This key will be passed to the
callback so it can check whether the key has changed.callback
- The callback to notify once the FileDescriptorFactory is created or has failed
to be created.
Do not invoke the callback directly from this method. Instead, create a handler
and post a Runnable.public InputStream createInputStream() throws IOException
RequestKey
InputStream
for the source. This method will be called if
RequestKey.createFileDescriptorFactoryAsync(RequestKey, Callback)
returns null.
Clients should implement this method if files exist in the assets/ folder, or for prototypes
that open a connection directly on a URL (be warned that this will cause GCs).
This method can be called from any thread.createInputStream
in interface RequestKey
IOException
public boolean hasOrientationExif() throws IOException
RequestKey
hasOrientationExif
in interface RequestKey
IOException
public boolean equals(Object o)
Object
The equals
method implements an equivalence relation
on non-null object references:
x
, x.equals(x)
should return
true
.
x
and y
, x.equals(y)
should return true
if and only if
y.equals(x)
returns true
.
x
, y
, and z
, if
x.equals(y)
returns true
and
y.equals(z)
returns true
, then
x.equals(z)
should return true
.
x
and y
, multiple invocations of
x.equals(y)
consistently return true
or consistently return false
, provided no
information used in equals
comparisons on the
objects is modified.
x
,
x.equals(null)
should return false
.
The equals
method for class Object
implements
the most discriminating possible equivalence relation on objects;
that is, for any non-null reference values x
and
y
, this method returns true
if and only
if x
and y
refer to the same object
(x == y
has the value true
).
Note that it is generally necessary to override the hashCode
method whenever this method is overridden, so as to maintain the
general contract for the hashCode
method, which states
that equal objects must have equal hash codes.
equals
in class Object
o
- the reference object with which to compare.true
if this object is the same as the obj
argument; false
otherwise.Object.hashCode()
,
HashMap
public int hashCode()
Object
HashMap
.
The general contract of hashCode
is:
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.
Object.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.)
hashCode
in class Object
Object.equals(java.lang.Object)
,
System.identityHashCode(java.lang.Object)
public String toString()
Object
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())