Is it possible to identify multiple fingers? about security-samples HOT 15 CLOSED

Comment by AndroidDeveloperLB
Saturday Nov 07, 2015 at 23:39 GMT

BTW, the sample here
http://developer.android.com/samples/FingerprintDialog/index.html
doesn't work like the reop here.

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Comment by thagikura
Monday Nov 09, 2015 at 02:15 GMT

Hi,

It's not possible. Registered fingerprints are treated equally.

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Comment by AndroidDeveloperLB
Monday Nov 09, 2015 at 06:16 GMT

Why ? It could be cool...
For example, I could set that each would do something else.
I could even make a gesture if the fingerprint sensor supports it... :(

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Comment by thagikura
Monday Nov 09, 2015 at 06:57 GMT

Because each registered fingerprint can unlock device for the account who registered the fingerprint equally. At least for now, these are treated as equally.

Maybe in the future, there is a change that identify multiple fingerprints. But current Android M doesn't support it.

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Comment by AndroidDeveloperLB
Monday Nov 09, 2015 at 07:32 GMT

Can you please consider adding it?
It could even be cool as non-secure feature, so that for the foreground app, you could choose to have events for what happens for each type of finger.
It could also perform tasks via the lock screen itself : call a specific person, open Google,...

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Comment by mariotaku
Sunday Nov 15, 2015 at 12:53 GMT

@AndroidDeveloperLB Actually it's possible (through hidden API). See FingerprintManager.java#258 .

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Comment by AndroidDeveloperLB
Sunday Nov 15, 2015 at 12:56 GMT

Cool, but using it might break in future releases.

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Comment by dientm
Friday Jun 02, 2017 at 11:38 GMT

I am sorry for reopen this thread, I got a problem that I have to identify which fingerprint (registered) is scanned? For now I don't know is android support, or how to implement using hidden API? Can anyone give me an idea?

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Comment by mariotaku
Friday Jun 02, 2017 at 12:01 GMT

@dientm Using reflection.

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Comment by dientm
Friday Jun 02, 2017 at 12:03 GMT

@mariotaku: thank for your reply but actually I dont have to much experience with android. Can you show me some example of reflection in android?

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Comment by mariotaku
Friday Jun 02, 2017 at 12:54 GMT

@dientm https://code.tutsplus.com/tutorials/learn-java-for-android-development-reflection-basics--mobile-3203

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Comment by poongodi90
Monday Sep 11, 2017 at 11:15 GMT

@dientm u did this multiuser fingerprint authentication?

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Comment by ZarSaeed
Tuesday Apr 10, 2018 at 08:20 GMT

Please tell me have you solved your issue if yes than how?

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Comment by sohambannerjee8
Wednesday Aug 01, 2018 at 06:51 GMT

I am also looking for this solution.

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Comment by AndroidDeveloperLB
Wednesday Aug 01, 2018 at 09:50 GMT

OK I wrote a suggestion about this here:
https://issuetracker.google.com/issues/112066297

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