bioprompt.kt

 val biometricPrompt = BiometricPrompt(activity, executor, object : BiometricPrompt.AuthenticationCallback() {

            override fun onAuthenticationError(errorCode: Int, errString: CharSequence) {
                super.onAuthenticationError(errorCode, errString)
                if (errorCode == BiometricPrompt.ERROR_NEGATIVE_BUTTON) {
                    // user clicked negative/cancel button
                } else {
                    TODO("Called when an unrecoverable error has been encountered and the operation is complete.")
                }
            }

            override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult) {
                super.onAuthenticationSucceeded(result)
                runOnUiThread{
                    [email protected](Intent(activity,NextActivity::class.java))
                }
            }

            override fun onAuthenticationFailed() {
                super.onAuthenticationFailed()
                runOnUiThread{
                    Toast.makeText(activity,"Authentication failed! Please try again.", Toast.LENGTH_SHORT).show()
                }
            }
        })