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FingerprintManagerCompat

public final class FingerprintManagerCompat
extends Object

java.lang.Object
↳	android.support.v4.hardware.fingerprint.FingerprintManagerCompat

A class that coordinates access to the fingerprint hardware.

On platforms before M, this class behaves as there would be no fingerprint hardware available.

Summary

Nested classes
`class`	`FingerprintManagerCompat.AuthenticationCallback` Callback structure provided to `authenticate(CryptoObject, int, CancellationSignal, AuthenticationCallback, Handler)`.
`class`	`FingerprintManagerCompat.AuthenticationResult` Container for callback data from `authenticate(CryptoObject, int, CancellationSignal, AuthenticationCallback, Handler)`.
`class`	`FingerprintManagerCompat.CryptoObject` A wrapper class for the crypto objects supported by FingerprintManager.

Public methods
`void`	`authenticate(FingerprintManagerCompat.CryptoObject crypto, int flags, CancellationSignal cancel, FingerprintManagerCompat.AuthenticationCallback callback, Handler handler)` Request authentication of a crypto object.
`static FingerprintManagerCompat`	`from(Context context)` Get a `FingerprintManagerCompat` instance for a provided context.
`boolean`	`hasEnrolledFingerprints()` Determine if there is at least one fingerprint enrolled.
`boolean`	`isHardwareDetected()` Determine if fingerprint hardware is present and functional.

Inherited methods

From class


  
    java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long millis, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long millis)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

Public methods

authenticate

void authenticate (FingerprintManagerCompat.CryptoObject crypto, 
                int flags, 
                CancellationSignal cancel, 
                FingerprintManagerCompat.AuthenticationCallback callback, 
                Handler handler)

Request authentication of a crypto object. This call warms up the fingerprint hardware and starts scanning for a fingerprint. It terminates when onAuthenticationError(int, CharSequence) or {@link AuthenticationCallback#onAuthenticationSucceeded(AuthenticationResult) is called, at which point the object is no longer valid. The operation can be canceled by using the provided cancel object.

Parameters
`crypto`	`FingerprintManagerCompat.CryptoObject`: object associated with the call or null if none required.
`flags`	`int`: optional flags; should be 0
`cancel`	`CancellationSignal`: an object that can be used to cancel authentication
`callback`	`FingerprintManagerCompat.AuthenticationCallback`: an object to receive authentication events
`handler`	`Handler`: an optional handler for events

from

FingerprintManagerCompat from (Context context)

Get a FingerprintManagerCompat instance for a provided context.

Parameters
`context`	`Context`

Returns
`FingerprintManagerCompat`

hasEnrolledFingerprints

boolean hasEnrolledFingerprints ()

Determine if there is at least one fingerprint enrolled.

Returns
`boolean`	true if at least one fingerprint is enrolled, false otherwise

isHardwareDetected

boolean isHardwareDetected ()

Determine if fingerprint hardware is present and functional.

Returns
`boolean`	true if hardware is present and functional, false otherwise.

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FingerprintManagerCompat

Summary

Nested classes

Public methods

Inherited methods

Public methods

authenticate

from

hasEnrolledFingerprints

isHardwareDetected