public final class BluetoothClass extends Object implements Parcelable
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 BluetoothDevice.createRfcommSocketToServiceRecord(java.util.UUID)
and BluetoothAdapter.listenUsingRfcommWithServiceRecord(java.lang.String, java.util.UUID)
Use BluetoothDevice.getBluetoothClass()
to retrieve the class for
a remote device.
Modifier and Type | Class and Description |
---|---|
static class |
BluetoothClass.Device
Defines all device class constants.
|
static class |
BluetoothClass.Service
Defines all service class constants.
|
Parcelable.ClassLoaderCreator<T>, Parcelable.Creator<T>
Modifier and Type | Field and Description |
---|---|
static Parcelable.Creator<BluetoothClass> |
CREATOR |
static int |
ERROR
Legacy error value.
|
static int |
PROFILE_A2DP |
static int |
PROFILE_A2DP_SINK |
static int |
PROFILE_HEADSET |
static int |
PROFILE_HID |
static int |
PROFILE_NAP |
static int |
PROFILE_OPP |
static int |
PROFILE_PANU |
CONTENTS_FILE_DESCRIPTOR, PARCELABLE_ELIDE_DUPLICATES, PARCELABLE_WRITE_RETURN_VALUE
Constructor and Description |
---|
BluetoothClass(int classInt) |
Modifier and Type | Method and Description |
---|---|
int |
describeContents()
Describe the kinds of special objects contained in this Parcelable
instance's marshaled representation.
|
boolean |
doesClassMatch(int profile)
Check class bits for possible bluetooth profile support.
|
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
BluetoothClass . |
int |
getMajorDeviceClass()
Return the major device class component of this
BluetoothClass . |
int |
hashCode()
Returns a hash code value for the object.
|
boolean |
hasService(int service)
Return true if the specified service class is supported by this
BluetoothClass . |
String |
toString()
Returns a string representation of the object.
|
void |
writeToParcel(Parcel out,
int flags)
Flatten this object in to a Parcel.
|
public static final int ERROR
public static final Parcelable.Creator<BluetoothClass> CREATOR
public static final int PROFILE_HEADSET
public static final int PROFILE_A2DP
public static final int PROFILE_OPP
public static final int PROFILE_HID
public static final int PROFILE_PANU
public static final int PROFILE_NAP
public static final int PROFILE_A2DP_SINK
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())
public int describeContents()
Parcelable
Parcelable.writeToParcel(Parcel, int)
,
the return value of this method must include the
Parcelable.CONTENTS_FILE_DESCRIPTOR
bit.describeContents
in interface Parcelable
Parcelable.CONTENTS_FILE_DESCRIPTOR
public void writeToParcel(Parcel out, int flags)
Parcelable
writeToParcel
in interface Parcelable
out
- The Parcel in which the object should be written.flags
- Additional flags about how the object should be written.
May be 0 or Parcelable.PARCELABLE_WRITE_RETURN_VALUE
.public boolean hasService(int service)
BluetoothClass
.
Valid service classes are the public constants in
BluetoothClass.Service
. For example, BluetoothClass.Service.AUDIO
.
service
- valid service classpublic int getMajorDeviceClass()
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.
public int getDeviceClass()
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.
public boolean doesClassMatch(int profile)
profile
- The profile to be checked