Do not go over handler to dispatch keyguard visibility

When going over the handler, it could happen with a bad interleaving
we thought that Keyguard was not showing when getting the
onFinishedGoingToSleep message, so we stopped fingerprint
authentication. For some reason our state machine for canceling
/restarting authentication didn't work correctly so the fingerprint
listening state was not correct.

Bug: 24178814
Change-Id: I2a4731f195982395244c12e4d33b2b7d561c5671

1 files changed, 8 insertions, 18 deletions

diff --git a/packages/Keyguard/src/com/android/keyguard/KeyguardUpdateMonitor.java b/packages/Keyguard/src/com/android/keyguard/KeyguardUpdateMonitor.java
index e342865..57ee319 100644
--- a/packages/Keyguard/src/com/android/keyguard/KeyguardUpdateMonitor.java
+++ b/packages/Keyguard/src/com/android/keyguard/KeyguardUpdateMonitor.java
@@ -121,7 +121,6 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener {
     private static final int MSG_DEVICE_PROVISIONED = 308;
     private static final int MSG_DPM_STATE_CHANGED = 309;
     private static final int MSG_USER_SWITCHING = 310;
-    private static final int MSG_KEYGUARD_VISIBILITY_CHANGED = 311;
     private static final int MSG_KEYGUARD_RESET = 312;
     private static final int MSG_BOOT_COMPLETED = 313;
     private static final int MSG_USER_SWITCH_COMPLETE = 314;
@@ -233,9 +232,6 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener {
                 case MSG_USER_SWITCH_COMPLETE:
                     handleUserSwitchComplete(msg.arg1);
                     break;
-                case MSG_KEYGUARD_VISIBILITY_CHANGED:
-                    handleKeyguardVisibilityChanged(msg.arg1);
-                    break;
                 case MSG_KEYGUARD_RESET:
                     handleKeyguardReset();
                     break;
@@ -1344,19 +1340,20 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener {
     }
 
     /**
-     * Handle {@link #MSG_KEYGUARD_VISIBILITY_CHANGED}
+     * Notifies that the visibility state of Keyguard has changed.
+     *
+     * <p>Needs to be called from the main thread.
      */
-    private void handleKeyguardVisibilityChanged(int showing) {
-        if (DEBUG) Log.d(TAG, "handleKeyguardVisibilityChanged(" + showing + ")");
-        boolean isShowing = (showing == 1);
-        mKeyguardIsVisible = isShowing;
+    public void onKeyguardVisibilityChanged(boolean showing) {
+        if (DEBUG) Log.d(TAG, "onKeyguardVisibilityChanged(" + showing + ")");
+        mKeyguardIsVisible = showing;
         for (int i = 0; i < mCallbacks.size(); i++) {
             KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
             if (cb != null) {
-                cb.onKeyguardVisibilityChangedRaw(isShowing);
+                cb.onKeyguardVisibilityChangedRaw(showing);
             }
         }
-        if (!isShowing) {
+        if (!showing) {
             mFingerprintAlreadyAuthenticated = false;
         }
         updateFingerprintListeningState();
@@ -1477,13 +1474,6 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener {
         }
     }
 
-    public void sendKeyguardVisibilityChanged(boolean showing) {
-        if (DEBUG) Log.d(TAG, "sendKeyguardVisibilityChanged(" + showing + ")");
-        Message message = mHandler.obtainMessage(MSG_KEYGUARD_VISIBILITY_CHANGED);
-        message.arg1 = showing ? 1 : 0;
-        message.sendToTarget();
-    }
-
     public void sendKeyguardReset() {
         mHandler.obtainMessage(MSG_KEYGUARD_RESET).sendToTarget();
     }