Use AlarmManager for lockout reset

So the lockout reset exactly fires after 30 seconds, independent
of whether the device was in deep sleep.

Bug: 23668918
Change-Id: Idea1a877c395897c1fd075cf98edf41c8b1f4082

2 files changed, 13 insertions, 2 deletions

diff --git a/core/java/android/hardware/fingerprint/FingerprintManager.java b/core/java/android/hardware/fingerprint/FingerprintManager.java
index 1f23c0a..7fef5e1 100644
--- a/core/java/android/hardware/fingerprint/FingerprintManager.java
+++ b/core/java/android/hardware/fingerprint/FingerprintManager.java
@@ -27,6 +27,7 @@ import android.os.CancellationSignal.OnCancelListener;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.Looper;
+import android.os.PowerManager;
 import android.os.RemoteException;
 import android.os.UserHandle;
 import android.security.keystore.AndroidKeyStoreProvider;
@@ -705,15 +706,23 @@ public class FingerprintManager {
     public void addLockoutResetCallback(final LockoutResetCallback callback) {
         if (mService != null) {
             try {
+                final PowerManager powerManager = mContext.getSystemService(PowerManager.class);
                 mService.addLockoutResetCallback(
                         new IFingerprintServiceLockoutResetCallback.Stub() {
 
                     @Override
                     public void onLockoutReset(long deviceId) throws RemoteException {
+                        final PowerManager.WakeLock wakeLock = powerManager.newWakeLock(
+                                PowerManager.PARTIAL_WAKE_LOCK, "lockoutResetCallback");
+                        wakeLock.acquire();
                         mHandler.post(new Runnable() {
                             @Override
                             public void run() {
-                                callback.onLockoutReset();
+                                try {
+                                    callback.onLockoutReset();
+                                } finally {
+                                    wakeLock.release();
+                                }
                             }
                         });
                     }
diff --git a/core/java/android/hardware/fingerprint/IFingerprintServiceLockoutResetCallback.aidl b/core/java/android/hardware/fingerprint/IFingerprintServiceLockoutResetCallback.aidl
index c9a5d59..e027a2b 100644
--- a/core/java/android/hardware/fingerprint/IFingerprintServiceLockoutResetCallback.aidl
+++ b/core/java/android/hardware/fingerprint/IFingerprintServiceLockoutResetCallback.aidl
@@ -23,6 +23,8 @@ import android.os.UserHandle;
  * Callback when lockout period expired and clients are allowed to authenticate again.
  * @hide
  */
-oneway interface IFingerprintServiceLockoutResetCallback {
+interface IFingerprintServiceLockoutResetCallback {
+
+    /** Method is synchronous so wakelock is held when this is called from a WAKEUP alarm. */
     void onLockoutReset(long deviceId);
 }