Report
public
final
class
Report
extends Object
| java.lang.Object | |
| ↳ | android.hardware.hid.Report |
Represents a Human Interface Device (HID) report exchanged between a host and a HID device.
A HID report contains structured data defined by the device's report descriptor. It includes an optional report ID that distinguishes between multiple report formats supported by the same device, along with a read-only binary data payload.
See also:
Summary
Public constructors | |
|---|---|
Report(int reportId, ByteBuffer data)
Creates a new |
|
Report(ByteBuffer data)
Constructor for a report that does not use report ID. |
|
Public methods | |
|---|---|
boolean
|
equals(Object obj)
Indicates whether some other object is "equal to" this one. |
ByteBuffer
|
getData()
Returns the data provided by the device for the report ID. |
int
|
getReportId()
Accessor for the report ID. |
int
|
hashCode()
Returns a hash code value for the object. |
Inherited methods | |
|---|---|
Public constructors
Report
public Report (int reportId,
ByteBuffer data)Creates a new Report instance with a specified report ID and binary data payload.
To prevent external modification, the provided ByteBuffer is copied
into an internal payload buffer.
| Parameters | |
|---|---|
reportId |
int: the ID for this report format, or zero if report IDs are not used. |
data |
ByteBuffer: the non-null buffer containing the raw binary report payload. |
Report
public Report (ByteBuffer data)
Constructor for a report that does not use report ID.
| Parameters | |
|---|---|
data |
ByteBuffer: the report data.
This value cannot be null. |
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.
An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.
| 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. |
getData
public ByteBuffer getData ()
Returns the data provided by the device for the report ID.
The data format is specified in the device descriptor, provided by
HidDevice.getReportDescriptor.
| Returns | |
|---|---|
ByteBuffer |
the ByteBuffer of the raw report data.
This value cannot be null. |
getReportId
public int getReportId ()
Accessor for the report ID.
| Returns | |
|---|---|
int |
the report ID or zero if the device does not use report IDs. |
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
equalsmethod, 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
equalsmethod, 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.
| Returns | |
|---|---|
int |
a hash code value for this object. |