How to detect if PIN/password/pattern is required to unlock phone?

Question

How can I detect if the phone is locked by a password, pin or pattern?

thank you!

Ruffo

Answer 1

Two methods

1. Check programatically - API 16+

https://gist.github.com/doridori/54c32c66ef4f4e34300f

Note that you dont need to check for face unlock as that requires that a pin/pass fallback is set.

2. Device Admin Policies

Can also look into the Device Admin Policies which allow restrictions on how the app is setup regarding security including pin/pass set restrictions

• Device Administration
• Enhancing Security with Device Management Policies

As an aside, these are the lock types you want to check for if using an encrypted Keystore. Check here for more info.

Equivoque

Seems like you can check for all three lock types through the Keyguard now "LOCK_PATTERN_ENABLED - This constant was deprecated in API level 23. Use KeyguardManager to determine the state and security level of the keyguard. Accessing this setting from an app that is targeting M or later throws a SecurityException." developer.android.com/reference/android/provider/… – Religionism

Your right. KeyGuardManager.isKeyGuardSecure() now returns "true if a PIN, pattern or password is set or a SIM card is locked." since 23 – Equivoque

@Don Do you mean that prior to 23 isKeyguardSecure did not return true when the device was locked with a pattern ? That's not what the documentation says. And it would be a pretty dumb thing to do. It would appear that isKeyguardSecure always returned true for PIN, pattern or password, since API 16 when it was introduced. I did test it on 19 and this is what it does. – Costate

@Don So your github code seems too complex for API 16+, isPatternSet is redundant. I gave an answer with a simpler version. – Costate

Answer 2

You can use the Settings.Secure class to query information about the security in place on an android device. For example, to see if the user has a lock pattern enabled you'd do:

ContentResolver cr = getContentResolver();
int lockPatternEnable = 
  Settings.Secure.getInt(cr, Settings.Secure.LOCK_PATTERN_ENABLED);

lockPatternEnable would then have a 0 if it wasn't enabled and a 1 if it was enabled.

Affiant

Won't that only give you if lock pattern enabled but not if Pin enabled. I have both Pin and Pattern on my phone, and its actually 2 different states. – Imitative

Hmmm. I'll have to do some more research. For now it looks like we only know how to check if the Lock patter is enabled. – Affiant

but i am getting exception saying 12-26 17:25:39.176: android.provider.Settings$SettingNotFoundException: lock_pattern_autolock..may i know how to resolve it – Halakah

KeyguardManager.isKeyguardSecure() will be true if a pin or password is set – Equivoque

lockPatternEnable is giving out 0 even when its set in Moto G5 Plus !! Any ideas how this can be resolved ? – Mercerize

It looks like this was depreciated in api 23 – Mercerize

Answer 3

This should be OK for Android API 16 and up, according to the documentation. I tested it on 19 and it seems to work.

private boolean IsDeviceSecured () {
    KeyguardManager keyguardManager =
            (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE); //api 16+
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        return keyguardManager.isDeviceSecure();
    }
    return keyguardManager.isKeyguardSecure ();
}

Costate