KeyguardManager

addKeyguardLockedStateListener

public void addKeyguardLockedStateListener (Executor executor, 
                KeyguardManager.KeyguardLockedStateListener listener)

Registers a listener to execute when the keyguard locked state changes.
Requires Manifest.permission.SUBSCRIBE_TO_KEYGUARD_LOCKED_STATE

createConfirmDeviceCredentialIntent

public Intent createConfirmDeviceCredentialIntent (CharSequence title, 
                CharSequence description)

This method was deprecated in API level 29.
see BiometricPrompt.Builder.setAllowedAuthenticators(int)

Get an intent to prompt the user to confirm credentials (pin, pattern, password or biometrics if enrolled) for the current user of the device. The caller is expected to launch this activity using Activity.startActivityForResult(Intent, int) and check for Activity.RESULT_OK if the user successfully completes the challenge.
Requires the PackageManager#FEATURE_SECURE_LOCK_SCREEN feature which can be detected using PackageManager.hasSystemFeature(String).

exitKeyguardSecurely

public void exitKeyguardSecurely (KeyguardManager.OnKeyguardExitResult callback)

This method was deprecated in API level 15.
Use R.attr.showWhenLocked or Activity.setShowWhenLocked(boolean) to seamlessly occlude and unocclude the keyguard as your application moves in and out of the foreground, without requiring any special permissions. Use requestDismissKeyguard(android.app.Activity, android.app.KeyguardManager.KeyguardDismissCallback) to request dismissal of the keyguard.

Exit the keyguard securely. The use case for this api is that, after disabling the keyguard, your app, which was granted permission to disable the keyguard and show a limited amount of information deemed safe without the user getting past the keyguard, needs to navigate to something that is not safe to view without getting past the keyguard. This will, if the keyguard is secure, bring up the unlock screen of the keyguard.
Requires Manifest.permission.DISABLE_KEYGUARD

inKeyguardRestrictedInputMode

public boolean inKeyguardRestrictedInputMode ()

This method was deprecated in API level 28.
Use isKeyguardLocked() instead.

Returns whether the lock screen is showing.

This is exactly the same as isKeyguardLocked().

isDeviceLocked

public boolean isDeviceLocked ()

Returns whether the device is currently locked for the user.

This method returns the device locked state for the Context's user. The device is considered to be locked for a user when the user's apps are currently inaccessible and some form of lock screen authentication is required to regain access to them. The lock screen authentication typically uses PIN, pattern, password, or biometric. Some devices may support additional methods, such as unlock using a paired smartwatch. "Swipe" does not count as authentication; if the lock screen is dismissible with swipe, for example due to the lock screen being set to Swipe or due to the device being kept unlocked by being near a trusted bluetooth device or in a trusted location, the device is considered unlocked.

isDeviceSecure

public boolean isDeviceSecure ()

Returns whether the user has a secure lock screen.

This returns true if the Context's user has a secure lock screen. A full user or a profile that uses a separate challenge has a secure lock screen if its lock screen is set to PIN, pattern, or password, as opposed to swipe or none. A profile that uses a unified challenge is considered to have a secure lock screen if and only if its parent user has a secure lock screen.

This method does not consider whether the lock screen is currently showing or not.

See also isKeyguardSecure() which includes locked SIM cards.

isKeyguardLocked

public boolean isKeyguardLocked ()

Returns whether the lock screen (also known as Keyguard) is showing.

Specifically, this returns true in the following cases:

• The lock screen is showing in the foreground.
• The lock screen is showing, but it is occluded by an activity that is showing on top of it. A common example is the phone app receiving a call or making an emergency call.
• The lock screen was showing but is temporarily disabled as a result of lock task mode or an app using the deprecated KeyguardLock API.

"Showing" refers to a logical state of the UI, regardless of whether the screen happens to be on. When the power button is pressed on an unlocked device, the lock screen starts "showing" immediately when the screen turns off.

This method does not distinguish a lock screen that is requiring authentication (e.g. with PIN, pattern, password, or biometric) from a lock screen that is trivially dismissible (e.g. with swipe). It also does not distinguish a lock screen requesting a SIM card PIN from a normal device lock screen. Finally, it always returns the global lock screen state and does not consider the Context's user specifically.

Note that isKeyguardLocked() is confusingly named and probably should be called isKeyguardShowing(). On many devices, the lock screen displays an unlocked padlock icon when it is trivially dismissible. As mentioned above, isKeyguardLocked() actually returns true in this case, not false as might be expected. isDeviceLocked() is an alternative API that has slightly different semantics.

isKeyguardSecure

public boolean isKeyguardSecure ()

Returns whether the user has a secure lock screen or there is a locked SIM card.

Specifically, this returns true if at least one of the following is true:

• The Context's user has a secure lock screen. A full user or a profile that uses a separate challenge has a secure lock screen if its lock screen is set to PIN, pattern, or password, as opposed to swipe or none. A profile that uses a unified challenge is considered to have a secure lock screen if and only if its parent user has a secure lock screen.
• At least one SIM card is currently locked and requires a PIN.

This method does not consider whether the lock screen is currently showing or not.

See also isDeviceSecure() which excludes locked SIM cards.

newKeyguardLock

public KeyguardManager.KeyguardLock newKeyguardLock (String tag)

This method was deprecated in API level 15.
Use R.attr.showWhenLocked or Activity.setShowWhenLocked(boolean) instead. This allows you to seamlessly occlude and unocclude the keyguard as your application moves in and out of the foreground and does not require that any special permissions be requested.

Enables you to temporarily disable / reenable the keyguard (lock screen).

removeKeyguardLockedStateListener

public void removeKeyguardLockedStateListener (KeyguardManager.KeyguardLockedStateListener listener)

Unregisters a listener that executes when the keyguard locked state changes.
Requires Manifest.permission.SUBSCRIBE_TO_KEYGUARD_LOCKED_STATE

requestDismissKeyguard

public void requestDismissKeyguard (Activity activity, 
                KeyguardManager.KeyguardDismissCallback callback)

Requests that the Keyguard (lock screen) be dismissed if it is currently showing.

If the Keyguard is not secure or the device is currently in a trusted state, calling this method will immediately dismiss the Keyguard without any user interaction.

If the Keyguard is secure and the device is not in a trusted state, this will bring up the UI so the user can enter their credentials.

If the value set for the Activity attr R.attr.turnScreenOn is true, the screen will turn on when the keyguard is dismissed.