diff --git a/services/core/java/com/android/server/policy/KeyCombinationManager.java b/services/core/java/com/android/server/policy/KeyCombinationManager.java
index 9213c87f12eca..9dfaca8d163fc 100644
--- a/services/core/java/com/android/server/policy/KeyCombinationManager.java
+++ b/services/core/java/com/android/server/policy/KeyCombinationManager.java
@@ -106,16 +106,43 @@ public class KeyCombinationManager {
             return KeyEvent.keyCodeToString(mKeyCode1) + " + "
                     + KeyEvent.keyCodeToString(mKeyCode2);
         }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) {
+                return true;
+            }
+            if (o instanceof TwoKeysCombinationRule) {
+                TwoKeysCombinationRule that = (TwoKeysCombinationRule) o;
+                return (mKeyCode1 == that.mKeyCode1 && mKeyCode2 == that.mKeyCode2) || (
+                        mKeyCode1 == that.mKeyCode2 && mKeyCode2 == that.mKeyCode1);
+            }
+            return false;
+        }
+
+        @Override
+        public int hashCode() {
+            int result = mKeyCode1;
+            result = 31 * result + mKeyCode2;
+            return result;
+        }
     }
 
-    public KeyCombinationManager(Handler handler) {
+    KeyCombinationManager(Handler handler) {
         mHandler = handler;
     }
 
     void addRule(TwoKeysCombinationRule rule) {
+        if (mRules.contains(rule)) {
+            throw new IllegalArgumentException("Rule : " + rule + " already exists.");
+        }
         mRules.add(rule);
     }
 
+    void removeRule(TwoKeysCombinationRule rule) {
+        mRules.remove(rule);
+    }
+
     /**
      * Check if the key event could be intercepted by combination key rule before it is dispatched
      * to a window.
diff --git a/services/core/java/com/android/server/policy/SingleKeyGestureDetector.java b/services/core/java/com/android/server/policy/SingleKeyGestureDetector.java
index f00edf3a76c54..92f0011339a5f 100644
--- a/services/core/java/com/android/server/policy/SingleKeyGestureDetector.java
+++ b/services/core/java/com/android/server/policy/SingleKeyGestureDetector.java
@@ -151,6 +151,23 @@ public final class SingleKeyGestureDetector {
                     + ", VeryLongPress=" + supportVeryLongPress()
                     + ", MaxMultiPressCount=" + getMaxMultiPressCount();
         }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) {
+                return true;
+            }
+            if (o instanceof SingleKeyRule) {
+                SingleKeyRule that = (SingleKeyRule) o;
+                return mKeyCode == that.mKeyCode;
+            }
+            return false;
+        }
+
+        @Override
+        public int hashCode() {
+            return mKeyCode;
+        }
     }
 
     static SingleKeyGestureDetector get(Context context) {
@@ -167,9 +184,16 @@ public final class SingleKeyGestureDetector {
     }
 
     void addRule(SingleKeyRule rule) {
+        if (mRules.contains(rule)) {
+            throw new IllegalArgumentException("Rule : " + rule + " already exists.");
+        }
         mRules.add(rule);
     }
 
+    void removeRule(SingleKeyRule rule) {
+        mRules.remove(rule);
+    }
+
     void interceptKey(KeyEvent event, boolean interactive) {
         if (event.getAction() == KeyEvent.ACTION_DOWN) {
             // Store the non interactive state when first down.
diff --git a/services/tests/wmtests/src/com/android/server/policy/KeyCombinationManagerTests.java b/services/tests/wmtests/src/com/android/server/policy/KeyCombinationManagerTests.java
index 4c698571db16e..487390d4411d9 100644
--- a/services/tests/wmtests/src/com/android/server/policy/KeyCombinationManagerTests.java
+++ b/services/tests/wmtests/src/com/android/server/policy/KeyCombinationManagerTests.java
@@ -228,4 +228,30 @@ public class KeyCombinationManagerTests {
         mKeyCombinationManager.interceptKey(firstKeyDown, true);
         assertTrue(mKeyCombinationManager.getKeyInterceptTimeout(KEYCODE_VOLUME_UP) > eventTime);
     }
-}
+
+    @Test
+    public void testAddRemove() throws InterruptedException {
+        final KeyCombinationManager.TwoKeysCombinationRule rule =
+                new KeyCombinationManager.TwoKeysCombinationRule(KEYCODE_VOLUME_DOWN,
+                        KEYCODE_POWER) {
+                    @Override
+                    void execute() {
+                        mAction1Triggered.countDown();
+                    }
+
+                    @Override
+                    void cancel() {
+                    }
+                };
+
+        long eventTime = SystemClock.uptimeMillis();
+        mKeyCombinationManager.removeRule(rule);
+        pressKeys(eventTime, KEYCODE_POWER, eventTime, KEYCODE_VOLUME_DOWN);
+        assertFalse(mAction1Triggered.await(SCHEDULE_TIME, TimeUnit.MILLISECONDS));
+
+        mKeyCombinationManager.addRule(rule);
+        eventTime = SystemClock.uptimeMillis();
+        pressKeys(eventTime, KEYCODE_POWER, eventTime, KEYCODE_VOLUME_DOWN);
+        assertTrue(mAction1Triggered.await(SCHEDULE_TIME, TimeUnit.MILLISECONDS));
+    }
+}
\ No newline at end of file
diff --git a/services/tests/wmtests/src/com/android/server/policy/SingleKeyGestureTests.java b/services/tests/wmtests/src/com/android/server/policy/SingleKeyGestureTests.java
index 8f94468df126d..280afbadec30c 100644
--- a/services/tests/wmtests/src/com/android/server/policy/SingleKeyGestureTests.java
+++ b/services/tests/wmtests/src/com/android/server/policy/SingleKeyGestureTests.java
@@ -297,4 +297,23 @@ public class SingleKeyGestureTests {
         pressKey(KEYCODE_BACK, mLongPressTime);
         assertTrue(mLongPressed.await(mWaitTimeout, TimeUnit.MILLISECONDS));
     }
+
+    @Test
+    public void testAddRemove() throws InterruptedException {
+        final SingleKeyGestureDetector.SingleKeyRule rule =
+                new SingleKeyGestureDetector.SingleKeyRule(KEYCODE_POWER) {
+                    @Override
+                    void onPress(long downTime) {
+                        mShortPressed.countDown();
+                    }
+                };
+
+        mDetector.removeRule(rule);
+        pressKey(KEYCODE_POWER, 0 /* pressTime */);
+        assertFalse(mShortPressed.await(mWaitTimeout, TimeUnit.MILLISECONDS));
+
+        mDetector.addRule(rule);
+        pressKey(KEYCODE_POWER, 0 /* pressTime */);
+        assertTrue(mShortPressed.await(mWaitTimeout, TimeUnit.MILLISECONDS));
+    }
 }