android-fingerprint-api

问题 I am currently working on a mobile application for (Android, ios), which has the following requirement. Please tell me whether I can use the inbuilt finger print reader on latest smart phone, tablet to achieve my requirement. I have a HRM System running on cloud, where I have the employee details, Now i am developing an mobile app for employee time attendance, basically application will work in this following steps. When employee open the app, it will show a finger print login. Employee will

问题 I want to create one application which can match fingerprint form my server existing fingerprints, on my server side some fingerprints saved with the help of external fingerprint scanner. can i match with saved fingerprint? 回答1: Match in database You cannot match fingerprint in database, please read this : https://en.wikipedia.org/wiki/Fingerprint_recognition You have to match templates, thanks to a specific algorithm. To match on server, you need AFIS solution: https://en.wikipedia.org/wiki

问题 I'm using androidx.biometric:biometric:1.0.0-alpha03 in a test project and when pushing the negative button I always get the following error message: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.CharSequence androidx.biometric.BiometricFragment.getNegativeButtonText()' on a null object reference at androidx.biometric.BiometricPrompt$1$1.run(BiometricPrompt.java:329) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) at java.util

问题 Suppose i've enrolled 5 fingerprints in my phone. I need to check which of the 5 fingerprint is used for login to my application. Or any way to check the fingerprint if it's not the primary fingerprint. 回答1: Currently this behaviour is not available in fingerprint API as for the API it's just authentication data and receive authenticated result from Android device.. 来源： https://stackoverflow.com/questions/57657816/is-there-anyway-to-identify-which-fingerprint-used-for-unlocking-accessing

问题 When we call mFingerprintManager .authenticate(cryptoObject, 0 /* flags */, mCancellationSignal, this, null); I notice that it is completely fine to pass null for cryptoObject . According to FingerprintManager documentation FingerprintManager.CryptoObject: object associated with the call or null if none required. According to https://github.com/googlesamples/android-FingerprintDialog, it shows a lengthy step to create CryptoObject . So, I'm not sure, whether I should use a CryptoObject , or

问题 I am trying to implement Biometric prompt API to authenticate user using fingerprint verification. I am successfully able to integrate Biometric prompt and it is working on andorid 9.0. But as the documentation suggests Biometric api is also backwards compatible, but when I build dialog using below code it shows API support warning. Call requires API level 28 (current min is 15): new android.hardware.biometrics.BiometricPrompt.Builder less... (Ctrl+F1) This check scans through all the Android

问题 I have an App that offers the usage of fingerprints for authentication. Before asking if the user wants to enable it, I verify if it is available at all and it is done via: FingerprintManager fingerprintManager = context.getSystemService(FingerprintManager.class); return fingerprintManager.isHardwareDetected() && fingerprintManager.hasEnrolledFingerprints(); Both FingerprintManager 's methods are annotated with: @RequiresPermission(USE_FINGERPRINT) But, the USE_FINGERPRINT permission is a

问题 I'm want to encrypt and decrypt files from SD-card using AES. In order to do it we always need a seed (usually a string which is inserted by user as a password): public static byte[] generateKey(String password) throws Exception{ byte[] keyStart = password.getBytes("UTF-8"); KeyGenerator kgen = KeyGenerator.getInstance("AES"); SecureRandom sr = SecureRandom.getInstance("SHA1PRNG", "Crypto"); sr.setSeed(keyStart); kgen.init(128, sr); SecretKey skey = kgen.generateKey(); return skey.getEncoded(

问题 I am using Android Studio on Mac El Capitan. How do I get the release Certificate Fingerprints? I need it for Firebase. I am not sure exactly how to get it. 回答1: Just to test it ( with the debug fingerprint ), run the following command in any directory with the terminal. $ keytool -exportcert -alias androiddebugkey -keystore ~/.android/debug.keystore -list -v Then copy the SHA1 value and paste it into your Firebase console. Be careful, the above will work for the debug environment, if you

问题 I am trying to make espresso test for fingerprint reading. It is possible for emulator test with such Runtime.getRuntime().exec("adb -e emu finger touch 1"); However this same code is not working on real devices. What is the way to do fingerprint reader on espresso test for real devices? 回答1: I'm sorry but, as far as I know, this is not possible with real devices. 来源： https://stackoverflow.com/questions/46329515/fingerprint-reader-espresso-test