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Android Reference

BluetoothClass


android.bluetooth

Class BluetoothClass

  • All Implemented Interfaces:
    Parcelable


    public final class BluetoothClass
    extends Object
    implements Parcelable
    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 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.

    • Constructor Detail

      • BluetoothClass

        public BluetoothClass(int classInt)
    • Method Detail

      • equals

        public boolean equals(Object o)
        Description copied from class: Object
        Compares this instance with the specified object and indicates if they are equal. In order to be equal, o must represent the same object as this instance using a class-specific comparison. The general contract is that this comparison should be reflexive, symmetric, and transitive. Also, no object reference other than null is equal to null.

        The default implementation returns true only if this == o. See Writing a correct equals method if you intend implementing your own equals method.

        The general contract for the equals and Object.hashCode() methods is that if equals returns true for any two objects, then hashCode() must return the same value for these objects. This means that subclasses of Object usually override either both methods or neither of them.

        Overrides:
        equals in class Object
        Parameters:
        o - the object to compare this instance with.
        Returns:
        true if the specified object is equal to this Object; false otherwise.
        See Also:
        Object.hashCode()
      • hashCode

        public int hashCode()
        Description copied from class: Object
        Returns an integer hash code for this object. By contract, any two objects for which Object.equals(java.lang.Object) returns true must return the same hash code value. This means that subclasses of Object usually override both methods or neither method.

        Note that hash values must not change over time unless information used in equals comparisons also changes.

        See Writing a correct hashCode method if you intend implementing your own hashCode method.

        Overrides:
        hashCode in class Object
        Returns:
        this object's hash code.
        See Also:
        Object.equals(java.lang.Object)
      • toString

        public String toString()
        Description copied from class: Object
        Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:
           getClass().getName() + '@' + Integer.toHexString(hashCode())

        See Writing a useful toString method if you intend implementing your own toString method.

        Overrides:
        toString in class Object
        Returns:
        a printable representation of this object.
      • describeContents

        public int describeContents()
        Description copied from interface: Parcelable
        Describe the kinds of special objects contained in this Parcelable's marshalled representation.
        Specified by:
        describeContents in interface Parcelable
        Returns:
        a bitmask indicating the set of special object types marshalled by the Parcelable.
      • hasService

        public 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, BluetoothClass.Service.AUDIO.

        Parameters:
        service - valid service class
        Returns:
        true if the service class is supported
      • getMajorDeviceClass

        public 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:
        major device class component
      • getDeviceClass

        public 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:
        device class component
      • doesClassMatch

        public boolean doesClassMatch(int profile)
        Check class bits for possible bluetooth profile support. This is a simple heuristic that tries to guess if a device with the given class bits might support specified profile. It is not accurate for all devices. It tries to err on the side of false positives.
        Parameters:
        profile - The profile to be checked
        Returns:
        True if this device might support specified profile.


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