Which Samsung devices do not support android's native fingerprint API?

Question

I\'m assuming that no phones with OS before marshmallow support the fingerprint API.

My questions are:

(a) Do all/any Samsung phones released with marshmallow

Answer 1

I can definitely tell you from my own experience that several Samsung phones continue to use Spass library even on Android M and over. For example right now I'm testing on Mobile OS: Android 6.0.1 (Galaxy Note 4 Edge). I've wrote some code that prints output to the logs in this way:

   /*
    * This function evaluates which fingerprint helper should be instantiated (if any)
    */
    public static FingerprintHelper initializeFingerprintHelper(Context context){
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            FingerprintManager manager = (FingerprintManager) context.getSystemService(Context.FINGERPRINT_SERVICE);

            if (manager != null) {
                logger.info("Android native fingerprint manager exists");
                if (manager.isHardwareDetected()) {
                    logger.info("Android native fingerprint manager detected hardware");
                    if (manager.hasEnrolledFingerprints()) {
                        logger.info("Android native fingerprint manager has enrolled fingerprints");
                    }else{
                        logger.info("Android native fingerprint manager has no enrolled fingerprints");
                    }
                    return new AndroidFingerprintHelper(context);
                }

            }
        }
        try{
            logger.info("Android native fingerprint manager is null, trying Samsung SPASS rollback");

            Spass spass = new Spass();
            spass.initialize(context);
            if(spass.isFeatureEnabled(Spass.DEVICE_FINGERPRINT)){
                return new SamsungFingerprintHelper(context);
            }
        } catch (SsdkUnsupportedException e) {
            logger.error("Spass library is missing on the device");
        }
        return null;
    }

And from the logs in the console I see that although Android Version on the devices is M(6.0.1) - the method

manager.isHardwareDetected()

returns false and the method goes to Spass lib initialization and it suceeds. So the device definitely using Spass library on android M.