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Android Reference

UsbAccessory


android.hardware.usb

Class UsbAccessory

  • All Implemented Interfaces:
    Parcelable

    public class UsbAccessory
extends Object
implements Parcelable
    A class representing a USB accessory, which is an external hardware component that communicates with an android application over USB. The accessory is the USB host and android the device side of the USB connection.

    When the accessory connects, it reports its manufacturer and model names, the version of the accessory, and a user visible description of the accessory to the device. The manufacturer, model and version strings are used by the USB Manager to choose an appropriate application for the accessory. The accessory may optionally provide a unique serial number and a URL to for the accessory's website to the device as well.

    An instance of this class is sent to the application via the UsbManager.ACTION_USB_ACCESSORY_ATTACHED Intent. The application can then call UsbManager.openAccessory(android.hardware.usb.UsbAccessory) to open a file descriptor for reading and writing data to and from the accessory.

    Developer Guides

    For more information about communicating with USB hardware, read the USB developer guide.

    • Constructor Detail

      • UsbAccessory

        public UsbAccessory(String manufacturer,
            String model,
            String description,
            String version,
            String uri,
            String serial)
        UsbAccessory should only be instantiated by UsbService implementation

      • UsbAccessory

        public UsbAccessory(String[] strings)
        UsbAccessory should only be instantiated by UsbService implementation

    • Method Detail

      • getManufacturer

        public String getManufacturer()
        Returns the manufacturer name of the accessory.
        Returns:
        the accessory manufacturer

      • getModel

        public String getModel()
        Returns the model name of the accessory.
        Returns:
        the accessory model

      • getDescription

        public String getDescription()
        Returns a user visible description of the accessory.
        Returns:
        the accessory description

      • getVersion

        public String getVersion()
        Returns the version of the accessory.
        Returns:
        the accessory version

      • getUri

        public String getUri()
        Returns the URI for the accessory. This is an optional URI that might show information about the accessory or provide the option to download an application for the accessory
        Returns:
        the accessory URI

      • getSerial

        public String getSerial()
        Returns the unique serial number for the accessory. This is an optional serial number that can be used to differentiate between individual accessories of the same model and manufacturer
        Returns:
        the unique serial number

      • equals

        public boolean equals(Object obj)
        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:
        obj - 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.


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