Added in API level 31

Strings


open class Strings
kotlin.Any
   ↳ android.hardware.biometrics.BiometricManager.Strings

Provides localized strings for an application that uses BiometricPrompt to authenticate the user.

Summary

Public methods
open CharSequence?

Provides a localized string that can be used as the label for a button that invokes BiometricPrompt.

open CharSequence?

Provides a localized string that can be shown while the user is authenticating with BiometricPrompt.

open CharSequence?

Provides a localized string that can be shown as the title for an app setting that enables authentication with BiometricPrompt.

Public methods

getButtonLabel

Added in API level 31
open fun getButtonLabel(): CharSequence?

Provides a localized string that can be used as the label for a button that invokes BiometricPrompt.

When possible, this method should use the given authenticator requirements to more precisely specify the authentication type that will be used. For example, if Class 3 biometric authentication is requested on a device with a Class 3 fingerprint sensor and a Class 2 face sensor, the returned string should indicate that fingerprint authentication will be used.

This method should also try to specify which authentication method(s) will be used in practice when multiple authenticators meet the given requirements. For example, if biometric authentication is requested on a device with both face and fingerprint sensors but the user has selected face as their preferred method, the returned string should indicate that face authentication will be used.

This method may return null if none of the requested authenticator types are available, but this should not be relied upon for checking the status of authenticators. Instead, use canAuthenticate(int).
Requires android.Manifest.permission#USE_BIOMETRIC

Return
CharSequence? The label for a button that invokes BiometricPrompt for authentication.

getPromptMessage

Added in API level 31
open fun getPromptMessage(): CharSequence?

Provides a localized string that can be shown while the user is authenticating with BiometricPrompt.

When possible, this method should use the given authenticator requirements to more precisely specify the authentication type that will be used. For example, if Class 3 biometric authentication is requested on a device with a Class 3 fingerprint sensor and a Class 2 face sensor, the returned string should indicate that fingerprint authentication will be used.

This method should also try to specify which authentication method(s) will be used in practice when multiple authenticators meet the given requirements. For example, if biometric authentication is requested on a device with both face and fingerprint sensors but the user has selected face as their preferred method, the returned string should indicate that face authentication will be used.

This method may return null if none of the requested authenticator types are available, but this should not be relied upon for checking the status of authenticators. Instead, use canAuthenticate(int).
Requires android.Manifest.permission#USE_BIOMETRIC

Return
CharSequence? The label for a button that invokes BiometricPrompt for authentication.

getSettingName

Added in API level 31
open fun getSettingName(): CharSequence?

Provides a localized string that can be shown as the title for an app setting that enables authentication with BiometricPrompt.

When possible, this method should use the given authenticator requirements to more precisely specify the authentication type that will be used. For example, if Class 3 biometric authentication is requested on a device with a Class 3 fingerprint sensor and a Class 2 face sensor, the returned string should indicate that fingerprint authentication will be used.

This method should not try to specify which authentication method(s) will be used in practice when multiple authenticators meet the given requirements. For example, if biometric authentication is requested on a device with both face and fingerprint sensors, the returned string should indicate that either face or fingerprint authentication may be used, regardless of whether the user has enrolled or selected either as their preferred method.

This method may return null if none of the requested authenticator types are supported by the system, but this should not be relied upon for checking the status of authenticators. Instead, use canAuthenticate(int) or android.content.pm.PackageManager#hasSystemFeature(String).
Requires android.Manifest.permission#USE_BIOMETRIC

Return
CharSequence? The label for a button that invokes BiometricPrompt for authentication.