public
final
class
BluetoothClass
extends Object
implements
Parcelable
| java.lang.Object | |
| ↳ | android.bluetooth.BluetoothClass |
Represents a Bluetooth class, which describes general characteristics and capabilities of a device. For example, a Bluetooth class will specify the general device type such as a phone, a computer, or headset, and whether it's capable of services such as audio or telephony.
Every Bluetooth class is composed of zero or more service classes, and exactly one device class. The device class is further broken down into major and minor device class components.
BluetoothClass is useful as a hint to roughly describe a device
(for example to show an icon in the UI), but does not reliably describe which
Bluetooth profiles or services are actually supported by a device. Accurate
service discovery is done through SDP requests, which are automatically
performed when creating an RFCOMM socket with createRfcommSocketToServiceRecord(UUID) and listenUsingRfcommWithServiceRecord(String, UUID)
Use getBluetoothClass() to retrieve the class for
a remote device.
Nested classes | |
|---|---|
class |
BluetoothClass.Device
Defines all device class constants. |
class |
BluetoothClass.Service
Defines all service class constants. |
Inherited constants |
|---|
 From
interface
android.os.Parcelable
|
Fields | |
|---|---|
public
static
final
Creator<BluetoothClass> |
CREATOR
|
Public methods | |
|---|---|
int
|
describeContents()
Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. |
boolean
|
equals(Object o)
Indicates whether some other object is "equal to" this one. |
int
|
getDeviceClass()
Return the (major and minor) device class component of this
|
int
|
getMajorDeviceClass()
Return the major device class component of this |
boolean
|
hasService(int service)
Return true if the specified service class is supported by this
|
int
|
hashCode()
Returns a hash code value for the object. |
String
|
toString()
Returns a string representation of the object. |
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 o)
Indicates whether some other object is "equal to" this one.
The equals method implements an equivalence relation
on non-null object references:
Developers
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.
| Parameters | |
|---|---|
o |
Object:
the reference object with which to compare. |
| Returns | |
|---|---|
boolean |
true if this object is the same as the obj
argument; false otherwise. |
int getDeviceClass ()
Return the (major and minor) device class component of this
BluetoothClass.
Values returned from this function can be compared with the
public constants in BluetoothClass.Device to determine which
device class is encoded in this Bluetooth class.
| Returns | |
|---|---|
int |
device class component |
int getMajorDeviceClass ()
Return the major device class component of this BluetoothClass.
Values returned from this function can be compared with the
public constants in BluetoothClass.Device.Major to determine
which major class is encoded in this Bluetooth class.
| Returns | |
|---|---|
int |
major device class component |
boolean hasService (int service)
Return true if the specified service class is supported by this
BluetoothClass.
Valid service classes are the public constants in
BluetoothClass.Service. For example, AUDIO.
| Parameters | |
|---|---|
service |
int:
valid service class |
| Returns | |
|---|---|
boolean |
true if the service class is supported |
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:
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. |
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 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.
|