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.

Summary

Public constructors

Report(int reportId, ByteBuffer data)

Creates a new Report instance with a specified report ID and binary data payload.

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 return true.
  • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
  • It is consistent: for any non-null reference values 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.
  • For any non-null reference value x, x.equals(null) should return false.

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 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.
  • If two objects are equal according to the equals method, then calling the hashCode method 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 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.

Returns
int a hash code value for this object.