KeyguardManager fails to unlock kitkat screen

Question

I've noticed very interesting behavior of Android that I cannot explain. I'm using the following code to wake up the phone and disable keyguard:

        PowerManager.WakeLock mFullWakelock = mPowerManager.newWakeLock(
                (PowerManager.SCREEN_BRIGHT_WAKE_LOCK |
                        PowerManager.FULL_WAKE_LOCK |
                        PowerManager.ACQUIRE_CAUSES_WAKEUP),
                LOCK_TAG
        );

        mFullWakelock.acquire();

        KeyguardManager keyguardManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
        KeyguardManager.KeyguardLock keyguardLock = keyguardManager.newKeyguardLock(LOCK_TAG);

        keyguardLock.disableKeyguard();

Imagine there is cycle of wake (programmatically)->disable keyguard (programmatically)->press power button (manually)->wake->disable keyguard. The cycle works great until I manually press Home button while the phone's keyguard is disabled. After that, phone does wake up but keyguard is no longer disabled programmatically. I'd appreciate any ideas!

Answer 1

The problem is that a keylock seems to expire whenever the user presses home button or opens a notification. So whenever this happens, you have to create a new keylock.

I used this solution and it worked great: https://stackoverflow.com/a/14519861/4098821