Google reCaptcha doesn't show captcha challenge dialog on a real device

Question

I'm trying to implement google reCaptcha following this guide from google developers site. My code:

private fun onClick() {
    SafetyNet.getClient(this).verifyWithRecaptcha(CAPTCHA_KEY)
            .addOnSuccessListener(this) { response ->
                if (!response.tokenResult.isEmpty()) {
                    verify(response.tokenResult)
                }
            }
            .addOnFailureListener(this) { e ->
                if (e is ApiException) {
                    Log.d("asd", "Error message: " + CommonStatusCodes.getStatusCodeString(e.statusCode))
                } else {
                    Log.d("asd", "Unknown type of error: " + e.message)
                }
            }
}

On emulator its work fine. When i click on button, reCaptcha show dialogs with several images where user should pick all images with cars, gidrants etc.

But, on real device. After i click on button, i always receive onSuccess callback, and the dialog never shown.

Maybe somebody know what the problem i faced?

Answer 1

Per the documentation:

If reCAPTCHA is confident that this is a real user on a real device it will return a token with no challenge. Otherwise it will provide a visual/audio challenge to attest the humanness of the user before returning a token.

"No challenge" means no reCAPTCHA. With reference to your real device, Google is apparently already satisified as to your humanness, and does not require further confirmation.

verifyWithRecaptcha() is operating as designed.