package Ġco . t emy . security sample . authentication Ċ Ċ import Ġandroid . annotation . Target Api Ċ import Ġandroid . app . Activity Ċ import Ġandroid . app . Key guard Manager Ċ import Ġandroid . content . Context Ċ import Ġandroid . hardware . fingerprint . Fingerprint Manager Ċ import Ġandroid . os . Build Ċ import Ġandroid . os . Cancellation Signal Ċ import Ġandroid . os . Handler Ċ import Ġandroid . support . v 4 . hardware . fingerprint . Fingerprint Manager Compat Ċ import Ġandroid . support . v 7 . app . AlertDialog Ċ import Ġco . t emy . security sample . Build Config Ċ import Ġco . t emy . security sample . R Ċ import Ġco . t emy . security sample . extent ions . open Lock Screen Settings Ċ Ċ @ Target Api ( Build . VERSION _ CODES . M ) Ċ class ĠSystem Services ( private Ġval Ġcontext : ĠContext ) Ġ{ ĊĊĠĠĠ Ġcompanion Ġobject Ġ{ ĊĠĠĠĠĠĠĠ Ġfun Ġhas Mar shm allow () Ġ= ĠBuild . VERSION . SDK _ INT Ġ>= ĠBuild . VERSION _ CODES . M ĊĠĠĠ Ġ} ĊĊĠĠĠ Ġprivate Ġval Ġkey guard Manager : ĠKey guard Manager ĊĊĠĠĠ Ġ/** ĊĠĠĠĠ Ġ* ĠThere Ġis Ġa Ġnice Ġ[ Fingerprint Manager Compat ] Ġclass Ġthat Ġmakes Ġall Ġdirty Ġwork Ġfor Ġus , Ġbut Ġas Ġalways , Ġsh it Ġhappens . ĊĠĠĠĠ Ġ* ĠBe hind Ġthe Ġscenes Ġit Ġis Ġusing Ġ` Context . get PackageManager (). has System Feature ( PackageManager . FEATURE _ F ING ER PRINT )` ĊĠĠĠĠ Ġ* Ġmethod , Ġthat Ġis Ġreturning Ġfalse Ġon Ġ 2 3 ĠAPI Ġem ulators , Ġwhen Ġin Ġfact Ġ[ Fingerprint Manager ] Ġis Ġthere Ġand Ġis Ġworking Ġfine . ĊĠĠĠĠ Ġ*/ ĊĠĠĠ Ġprivate Ġvar Ġfingerprint Manager : ĠF ingerprint Manager ? Ġ= Ġnull ĊĊĠĠĠ Ġinit Ġ{ ĊĠĠĠĠĠĠĠ Ġkey guard Manager Ġ= Ġcontext . getSystem Service ( Context . KEY GU ARD _ SERVICE ) Ġas ĠKey guard Manager ĊĠĠĠĠĠĠĠ Ġif Ġ( has Mar shm allow ()) Ġ{ ĊĠĠĠĠĠĠĠĠĠĠĠ Ġfingerprint Manager Ġ= Ġcontext . getSystem Service ( Context . F ING ER PRINT _ SERVICE ) Ġas ĠF ingerprint Manager ĊĠĠĠĠĠĠĠ Ġ} ĊĠĠĠ Ġ} ĊĊĠĠĠ Ġfun Ġis Device Secure (): ĠBoolean Ġ= Ġif Ġ( has Mar shm allow ()) Ġkey guard Manager . is Device Secure Ġelse Ġkey guard Manager . is Key guard Secure ĊĊĠĠĠ Ġfun Ġis Fingerprint Hardware Available () Ġ= Ġfingerprint Manager ?. is Hardware Detected Ġ?: Ġfalse ĊĊĠĠĠ Ġfun Ġhas En rolled Fingerprint s () Ġ= Ġfingerprint Manager ?. has En rolled Fingerprint s () Ġ?: Ġfalse ĊĊĠĠĠ Ġfun Ġauthenticate Fingerprint ( crypto Object : ĠF ingerprint Manager . Crypto Object , Ġcancellation Signal : ĠC ancellation Signal , Ġflags : ĠInt , Ġcallback : ĠF ingerprint Manager . Authentication Callback , Ġhandler : ĠHandler ?) Ġ{ ĊĠĠĠĠĠĠĠ Ġfingerprint Manager ?. authenticate ( crypto Object , Ġcancellation Signal , Ġflags , Ġcallback , Ġhandler ) ĊĠĠĠ Ġ} ĊĊĠĠĠ Ġfun Ġshow Authentication Screen ( activity : ĠActivity , Ġrequest Code : ĠInt , Ġtitle : ĠString ? Ġ= Ġnull , Ġdescription : ĠString ? Ġ= Ġnull ) Ġ{ ĊĠĠĠĠĠĠĠ Ġ// ĠCreate Ġthe ĠConfirm ĠCredentials Ġscreen . ĠYou Ġcan Ġcustomize Ġthe Ġtitle Ġand Ġdescription . ĠOr ĊĠĠĠĠĠĠĠ Ġ// Ġwe Ġwill Ġprovide Ġa Ġgeneric Ġone Ġfor Ġyou Ġif Ġyou Ġleave Ġit Ġnull ĊĠĠĠĠĠĠĠ Ġif Ġ( has Mar shm allow ()) Ġ{ ĊĠĠĠĠĠĠĠĠĠĠĠ Ġval Ġintent Ġ= Ġkey guard Manager . create Confirm Device Credential Intent ( title , Ġdescription ) ĊĠĠĠĠĠĠĠĠĠĠĠ Ġif Ġ( intent Ġ!= Ġnull ) Ġ{ ĊĠĠĠĠĠĠĠĠĠĠĠĠĠĠĠ Ġactivity . startActivity For Result ( intent , Ġrequest Code ) ĊĠĠĠĠĠĠĠĠĠĠĠ Ġ} ĊĠĠĠĠĠĠĠ Ġ} ĊĠĠĠ Ġ} ĊĊĠĠĠ Ġfun Ġshow Device Security Alert (): ĠAlertDialog Ġ{ ĊĠĠĠĠĠĠĠ Ġreturn ĠAlertDialog . Builder ( context ) ĊĠĠĠĠĠĠĠĠĠĠĠĠĠĠĠ Ġ. setTitle ( R . string . lock _ title ) ĊĠĠĠĠĠĠĠĠĠĠĠĠĠĠĠ Ġ. setMessage ( R . string . lock _ body ) ĊĠĠĠĠĠĠĠĠĠĠĠĠĠĠĠ Ġ. set Positive Button ( R . string . lock _ settings ) Ġ{ Ġ_, Ġ_ Ġ-> Ġcontext . open Lock Screen Settings () Ġ} ĊĠĠĠĠĠĠĠĠĠĠĠĠĠĠĠ Ġ. set Negative Button ( R . string . lock _ exit ) Ġ{ Ġ_, Ġ_ Ġ-> ĠSystem . exit ( 0 ) Ġ} ĊĠĠĠĠĠĠĠĠĠĠĠĠĠĠĠ Ġ. set Cancel able ( Build Config . DEBUG ) ĊĠĠĠĠĠĠĠĠĠĠĠĠĠĠĠ Ġ. show () ĊĠĠĠ Ġ} Ċ }