指纹识别调用系统测试页面

    private fun showAuthenticationScreen() {
        val intent = mKeyManager!!.createConfirmDeviceCredentialIntent("finger", "测试指纹识别")
        if (intent != null) {
            startActivityForResult(intent, REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS)
        }
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
        if (requestCode == REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS) {
            // Challenge completed, proceed with using cipher
            if (resultCode == Activity.RESULT_OK) {
                Toast.makeText(this, "识别成功", Toast.LENGTH_SHORT).show()
            } else {
                Toast.makeText(this, "识别失败", Toast.LENGTH_SHORT).show()
            }
        }
    }

The issue includes only a Kotlin snippet calling Android's device-credential confirmation screen; no repository file, test, or entry point is named. First clarify the intended change and acceptance criteria, then locate the corresponding Android activity and define what successful fingerprint recognition should do.