Android locked for time

Question

Is there any method to retrive time when device is locked? For example, user locked his device and had it locked for 59 minutes. Then my application checks the time and unlock it.

score 1 · Accepted Answer · answered Jun 29 '16 at 17:32

1

I don't know of a direct method. However, you should be able to listen to ACTION_SCREEN_ON and OFF broadcast events and calculate the elapsed time.

answered Jun 29 '16 at 17:32

muratgu

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score 0 · Answer 2 · edited May 23 '17 at 12:08

I dont think that Android will stop you take current time even if device is locked.

You can take current time as below:

Calendar c = Calendar.getInstance(); 
int seconds = c.get(Calendar.SECOND);

And then you can unlock the screen through below code:

 PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
    PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK
            | PowerManager.ACQUIRE_CAUSES_WAKEUP
            | PowerManager.ON_AFTER_RELEASE, "INFO");
    wl.acquire();

    KeyguardManager km = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);
    KeyguardLock kl = km.newKeyguardLock("name");
    kl.disableKeyguard();

You can also find couple of stack overflow discussions around unlocking like:

That can be taken by the difference with the time device was locked. What @ramzixp is asking is how to retrieve time when device is locked. — Aman Chhabra, Jun 29 '16 at 17:37

Android locked for time

2 Answers2