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I have an application, where I'm requesting user to Authenticate in my app via KeyguardManager using PIN.

The important thing is that I have android:showOnLockScreen="true" to my activity in manifest, so when device is locked, and my activity is showing, I'm tapping on "Sign in" button, which calls showAuthenticationScreen(), I'm receiving RESULT_CANCELED in my onActivityResult(). 

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void showAuthenticationScreen() {
    KeyguardManager keyguardManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
    if (keyguardManager == null) {
        return;
    }

    Intent kgIntent = keyguardManager.createConfirmDeviceCredentialIntent(getString(R.string.nnl_kg_title), getKgPrompt());

    if (kgIntent != null) {
        startActivityForResult(kgIntent, KG_REQUEST_ID);
    }
}

I took a look to system logs, and found out that I'm getting this error back from BiometricService with message "Canceling from CDC". Here is some part of system logs.

936   936 I ActivityTaskManager: START u0 {act=android.app.action.CONFIRM_DEVICE_CREDENTIAL_WITH_USER flg=0x8080000 pkg=com.android.settings cmp=com.android.settings/.password.ConfirmDeviceCredentialActivity$InternalActivity (has extras)} from
uid 1000
11-11 10:54:53.076   936   972 D ActivityTaskManager: Top Process State changed to PROCESS_STATE_TOP_SLEEPING
11-11 10:54:53.092   936  1032 W ProcessStats: Tracking association SourceState{2c15fa1 com.android.settings/1000 Top #565108} whose proc state 1 is better than process ProcessState{54a9784 com.google.android.gms.persistent/10029 pkg=com.google.android.gms} proc st
ate 2 (9 skipped)
11-11 10:54:53.126   936   936 D BiometricService: Creating auth session. Modality: 1, cookie: 1632337634
11-11 10:54:53.127   936   936 V FingerprintService: startAuthentication(com.android.settings)
11-11 10:54:53.128   936   936 V FingerprintService: Returning cookie: 1632337634
11-11 10:54:53.128   936   936 D BiometricService: Matched cookie: 1632337634, 0 remaining
11-11 10:54:53.128   936   936 V FingerprintService: starting client AuthenticationClientImpl(com.android.settings) cookie: 1632337634/1632337634
11-11 10:54:53.135   936   936 W FingerprintService: client com.android.settings is authenticating...
11-11 10:54:53.161   936   936 D BiometricService: Cancelling from CDC
11-11 10:54:53.162   936   936 V FingerprintService: Stopping client com.android.settings, fromClient: false
11-11 10:54:53.173   936   936 W FingerprintService: client com.android.settings is no longer authenticating
11-11 10:54:53.177   936  3056 D ActivityTaskManager: Top Process State changed to PROCESS_STATE_TOP
11-11 10:54:53.195   936   936 V FingerprintService: handleError(client=com.android.settings, error = 5)
11-11 10:54:53.195   936   936 V FingerprintService: Done with client: com.android.settings
11-11 10:54:53.196   936   936 D BiometricService: Error: 5 cookie: 1632337634
11-11 10:54:53.285   936  3041 I ActivityTaskManager: Activity reported stop, but no longer stopping: ActivityRecord{9b6d8b u0 com.natigbabayev.biometricprompt/.MainActivity t1936}

So is there any solution to this? Can I still ask users to authenticate with PIN even when device is locked? Thank you guys in advance.

Hayk Nahapetyan
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1 Answers1

-1

You never used this function - onActivityResult(int requestCode, int resultCode, Intent data) in your Current Activity

which is used to process the return values from the activity which returns the result codes into the current activity that you are in.

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data){
    super.onActivityResult(requestCode, resultCode, data);
    if(requestCode == KG_REQUEST_ID){
        if(resultCode == Activity.RESULT_OK) {
            // Your Code if Authenticated Successfully.
        }
        if(resultCode == Activity.RESULT_CANCELED) {
            // Your Code If Canceled.
        }
    }
}
Nikhil Khedlekar
  • 1