fingerprint

问题 How to launch finger print enrollment settings screen(Add fingerprint screen) from my app? After enrolling finger print, is there any way to navigate back to my application? (with startActivityForResult) 回答1: After reading the docs, I found out that as of now, there is no such intent action available. I launched the security settings(where fingerprints option available) with the below Intent. startActivity(new Intent(android.provider.Settings.ACTION_SECURITY_SETTINGS)); 回答2: with API >= P

问题 How to launch finger print enrollment settings screen(Add fingerprint screen) from my app? After enrolling finger print, is there any way to navigate back to my application? (with startActivityForResult) 回答1: After reading the docs, I found out that as of now, there is no such intent action available. I launched the security settings(where fingerprints option available) with the below Intent. startActivity(new Intent(android.provider.Settings.ACTION_SECURITY_SETTINGS)); 回答2: with API >= P

问题 Is it possible to retrieve the number of available fingerprints in an Android device. I want to do some functionality when number of fingerprints changes in the device. For that I have to retrieve the number of fingerprints in the device first. Can anyone suggest how to do that. 回答1: On devices with a fingerprint sensor, users can enroll one or more fingerprints and use those fingerprints to unlock the device and perform other tasks. Android uses the Fingerprint Hardware Abstraction Layer

问题 I have an application that is about to change in order to validate users by their finger prints. Basically, the logon window will be redesigned to lose the login name and password fields. In their place, the window will wait until someone puts his/her finger on a fingerprint scanner connected to the workstation. Since there are about 50,000 users, whose account data are stored in a Oracle server, the problem is what to save in the User table and how to select the correct user by using the

问题 Has anyone had any success using a fingerprint scanner in an ASP.NET application? I am looking for a solution where a user would click a button in our web application that would then trigger a locally installed fingerprint reader, take the fingerprint and then upload the scanned image back to the server. 回答1: To the best of my knowledge, there are four approaches to this: An ActiveX control (many fingerprint reader makers provide one with their SDKs.) A BHO and other plugins for other

问题 I'm testing on a Google Pixel device on 7.1.1 and finding that my Private Key isn't being invalidated when all fingerprints are removed from the device. I've tested using a single symmetric SecretKey as per the demo app and that worked as expected, however using an asymmetric key pair only throws a KeyPermanentlyInvalidatedException when new prints are enrolled, and not when they are all deleted. What's more, if I then enrol a new fingerprint, then show my fingerprint dialog and successfully

问题 I have already signed my apk with default debug.keystore key.But unfortunately my system destroyed,Now I need to get the key store from the already signed apk. to replace with old apk with new apk. I have MD5,SHA fingerprints with.But i could make them as keystore to sign the apk. Any suggestions would be appreciated.Thank you in advance. 回答1: unzip -p Name-of-apk.apk META-INF/CERT.RSA | keytool -printcert is what I used. It produces information such as the owner, issuer, serial number, valid

问题 This is a very specific question which will probably earn me the tumbleweed badge, but please answer if you can I've imported DigitalPersona sdk dll's as type libraries into Delphi and am trying to verify fingerprints which I've stored as serialized data in a database, it's working very awesomely. Enrollment seems to work fine, but I can't turn the binary data from the finger prints back into DPFPTemplate objects. I keep getting an OLEException every time I try to used the defaultinterface

问题 I have over 1.3milion images that I have to compare with each other, and a few hundreds per day are added. My company take an image and create a version that can be utilized by our vendors. The files are often very similar to each other, for example two different companies can send us two different images, a JPG and a GIF, both with the McDonald Logo, with months between the submissions. What is happening is that at the end we find ourselves creating two different times the same logo when we

问题 Im digging into Apple's Touch ID, more precisely the Local Authenticator. The documentation as of now is pretty sparse. Its mainly just this: LAContext *myContext = [[LAContext alloc] init]; NSError *authError = nil; NSString *myLocalizedReasonString = <#String explaining why app needs authentication#>; if ([myContext canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&authError]) { [myContext evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason