PrintAttributes.Resolution
public
static
final
class
PrintAttributes.Resolution
extends Object
| java.lang.Object | |
| ↳ | android.print.PrintAttributes.Resolution |
This class specifies a supported resolution in DPI (dots per inch). Resolution defines how many points with different color can be placed on one inch in horizontal or vertical direction of the target media. For example, a printer with 600 DPI can produce higher quality images the one with 300 DPI resolution.
Summary
Public constructors | |
|---|---|
Resolution(String id, String label, int horizontalDpi, int verticalDpi)
Creates a new instance. |
|
Public methods | |
|---|---|
boolean
|
equals(Object obj)
Indicates whether some other object is "equal to" this one. |
int
|
getHorizontalDpi()
Gets the horizontal resolution in DPI (dots per inch). |
String
|
getId()
Gets the unique resolution id. |
String
|
getLabel()
Gets the resolution human readable label. |
int
|
getVerticalDpi()
Gets the vertical resolution in DPI (dots per inch). |
int
|
hashCode()
Returns a hash code value for the object. |
String
|
toString()
Returns a string representation of the object. |
Inherited methods | |
|---|---|
Public constructors
Resolution
public Resolution (String id, String label, int horizontalDpi, int verticalDpi)
Creates a new instance.
| Parameters | |
|---|---|
id |
String: The unique resolution id. It is unique amongst other resolutions
supported by the printer.
This value cannot be null. |
label |
String: The localized human readable label.
This value cannot be null. |
horizontalDpi |
int: The horizontal resolution in DPI (dots per inch).
Value is 1 or greater |
verticalDpi |
int: The vertical resolution in DPI (dots per inch).
Value is 1 or greater |
| Throws | |
|---|---|
IllegalArgumentException |
If the id is empty or the label is empty or the horizontalDpi is less than or equal to zero or the verticalDpi is less than or equal to zero. |
Public methods
equals
public boolean equals (Object obj)
Indicates whether some other object is "equal to" this one.
The equals method implements an equivalence relation
on non-null object references:
- It is reflexive: for any non-null reference value
x,x.equals(x)should returntrue. - It is symmetric: for any non-null reference values
xandy,x.equals(y)should returntrueif and only ify.equals(x)returnstrue. - It is transitive: for any non-null reference values
x,y, andz, ifx.equals(y)returnstrueandy.equals(z)returnstrue, thenx.equals(z)should returntrue. - It is consistent: for any non-null reference values
xandy, multiple invocations ofx.equals(y)consistently returntrueor consistently returnfalse, provided no information used inequalscomparisons on the objects is modified. - For any non-null reference value
x,x.equals(null)should returnfalse.
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.
| Parameters | |
|---|---|
obj |
Object: the reference object with which to compare. |
| Returns | |
|---|---|
boolean |
true if this object is the same as the obj
argument; false otherwise. |
getHorizontalDpi
public int getHorizontalDpi ()
Gets the horizontal resolution in DPI (dots per inch).
| Returns | |
|---|---|
int |
The horizontal resolution. Value is 1 or greater |
getId
public String getId ()
Gets the unique resolution id. It is unique amongst other resolutions supported by the printer.
This id is defined by the client that generated the resolution instance and should not be interpreted by other parties.
| Returns | |
|---|---|
String |
The unique resolution id.
This value cannot be null. |
getLabel
public String getLabel ()
Gets the resolution human readable label.
| Returns | |
|---|---|
String |
The human readable label.
This value cannot be null. |
getVerticalDpi
public int getVerticalDpi ()
Gets the vertical resolution in DPI (dots per inch).
| Returns | |
|---|---|
int |
The vertical resolution. Value is 1 or greater |
hashCode
public 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:
- Whenever it is invoked on the same object more than once during
an execution of a Java application, the
hashCodemethod must consistently return the same integer, provided no information used inequalscomparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. - If two objects are equal according to the
equals(Object)method, then calling thehashCodemethod on each of the two objects must produce the same integer result. - It is not required that if two objects are unequal
according to the
equals(java.lang.Object)method, then calling thehashCodemethod 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
Java™ programming language.)
| Returns | |
|---|---|
int |
a hash code value for this object. |
toString
public 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. |