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Commit 77e35e9e authored by Will Leshner's avatar Will Leshner
Browse files

Avoid lock screen flash when going to dream. 

This is specifically when entering a dream from a single power button
tap on devices that are configured with that behavior.

Bug: 261662912
Test: manually by tapping power button to enter a dream and observing
that the device is locks at the same time without flashing the lock
screen.

Change-Id: I89ecce9cc39cb1cb6f7b19068908ba436643223c
parent 7be84b8a

services/core/java/com/android/server/policy/PhoneWindowManager.java

+23 −5
Original line number Diff line number Diff line
@@ -575,6 +575,9 @@ public class PhoneWindowManager implements WindowManagerPolicy { 
    // What we do when the user double-taps on home

    private int mDoubleTapOnHomeBehavior;



    // Whether to lock the device after the next app transition has finished.

    private boolean mLockAfterAppTransitionFinished;



    // Allowed theater mode wake actions

    private boolean mAllowTheaterModeWakeFromKey;

    private boolean mAllowTheaterModeWakeFromPowerKey;
@@ -1073,11 +1076,10 @@ public class PhoneWindowManager implements WindowManagerPolicy { 
            return;

        }



        // Make sure the device locks. Unfortunately, this has the side-effect of briefly revealing

        // the lock screen before the dream appears. Note that locking is a side-effect of the no

        // dream action that is executed if we early return above.

        // TODO(b/261662912): Find a better way to lock the device that doesn't result in jank.

        lockNow(null);

        synchronized (mLock) {

            // Lock the device after the dream transition has finished.

            mLockAfterAppTransitionFinished = true;

        }



        dreamManagerInternal.requestDream();

    }
@@ -2197,6 +2199,22 @@ public class PhoneWindowManager implements WindowManagerPolicy { 
                handleTransitionForKeyguardLw(

                        keyguardGoingAwayCancelled /* startKeyguardExitAnimation */,

                        true /* notifyOccluded */);



                synchronized (mLock) {

                    mLockAfterAppTransitionFinished = false;

                }

            }



            @Override

            public void onAppTransitionFinishedLocked(IBinder token) {

                synchronized (mLock) {

                    if (!mLockAfterAppTransitionFinished) {

                        return;

                    }

                    mLockAfterAppTransitionFinished = false;

                }



                lockNow(null);

            }

        });