diff --git a/include/input/InputEventLabels.h b/include/input/InputEventLabels.h
index 4b33a96..6d072a3 100644
--- a/include/input/InputEventLabels.h
+++ b/include/input/InputEventLabels.h
@@ -326,7 +326,7 @@
     DEFINE_KEYCODE(ALL_APPS),
     DEFINE_KEYCODE(REFRESH),
 
-    { NULL, 0 }
+    { nullptr, 0 }
 };
 
 static const InputEventLabel AXES[] = {
@@ -375,7 +375,7 @@
 
     // NOTE: If you add a new axis here you must also add it to several other files.
     //       Refer to frameworks/base/core/java/android/view/MotionEvent.java for the full list.
-    { NULL, 0 }
+    { nullptr, 0 }
 };
 
 static const InputEventLabel LEDS[] = {
@@ -396,7 +396,7 @@
     DEFINE_LED(CONTROLLER_4),
 
     // NOTE: If you add new LEDs here, you must also add them to Input.h
-    { NULL, 0 }
+    { nullptr, 0 }
 };
 
 static const InputEventLabel FLAGS[] = {
@@ -404,7 +404,7 @@
     DEFINE_FLAG(FUNCTION),
     DEFINE_FLAG(GESTURE),
 
-    { NULL, 0 }
+    { nullptr, 0 }
 };
 
 static int lookupValueByLabel(const char* literal, const InputEventLabel *list) {
@@ -424,7 +424,7 @@
         }
         list++;
     }
-    return NULL;
+    return nullptr;
 }
 
 static inline int32_t getKeyCodeByLabel(const char* label) {
@@ -435,7 +435,7 @@
     if (keyCode >= 0 && keyCode < static_cast<int32_t>(size(KEYCODES))) {
         return KEYCODES[keyCode].literal;
     }
-    return NULL;
+    return nullptr;
 }
 
 static inline uint32_t getKeyFlagByLabel(const char* label) {
diff --git a/include/input/VelocityTracker.h b/include/input/VelocityTracker.h
index ffa1614..727865a 100644
--- a/include/input/VelocityTracker.h
+++ b/include/input/VelocityTracker.h
@@ -63,7 +63,7 @@
 
     // Creates a velocity tracker using the specified strategy.
     // If strategy is NULL, uses the default strategy for the platform.
-    VelocityTracker(const char* strategy = NULL);
+    VelocityTracker(const char* strategy = nullptr);
 
     ~VelocityTracker();
 
diff --git a/libs/input/InputDevice.cpp b/libs/input/InputDevice.cpp
index 4287abe..5d27bf6 100644
--- a/libs/input/InputDevice.cpp
+++ b/libs/input/InputDevice.cpp
@@ -175,7 +175,7 @@
             return &range;
         }
     }
-    return NULL;
+    return nullptr;
 }
 
 void InputDeviceInfo::addSource(uint32_t source) {
diff --git a/libs/input/InputTransport.cpp b/libs/input/InputTransport.cpp
index d192f63..770d483 100644
--- a/libs/input/InputTransport.cpp
+++ b/libs/input/InputTransport.cpp
@@ -226,7 +226,7 @@
 
 sp<InputChannel> InputChannel::dup() const {
     int fd = ::dup(getFd());
-    return fd >= 0 ? new InputChannel(getName(), fd) : NULL;
+    return fd >= 0 ? new InputChannel(getName(), fd) : nullptr;
 }
 
 
@@ -388,7 +388,7 @@
 
 bool InputConsumer::isTouchResamplingEnabled() {
     char value[PROPERTY_VALUE_MAX];
-    int length = property_get("ro.input.noresample", value, NULL);
+    int length = property_get("ro.input.noresample", value, nullptr);
     if (length > 0) {
         if (!strcmp("1", value)) {
             return false;
@@ -409,7 +409,7 @@
 #endif
 
     *outSeq = 0;
-    *outEvent = NULL;
+    *outEvent = nullptr;
 
     // Fetch the next input message.
     // Loop until an event can be returned or no additional events are received.
@@ -544,7 +544,7 @@
         const InputMessage* next;
         if (batch.samples.isEmpty()) {
             mBatches.removeAt(i);
-            next = NULL;
+            next = nullptr;
         } else {
             next = &batch.samples.itemAt(0);
         }
diff --git a/libs/input/KeyCharacterMap.cpp b/libs/input/KeyCharacterMap.cpp
index b561b60..26747bd 100644
--- a/libs/input/KeyCharacterMap.cpp
+++ b/libs/input/KeyCharacterMap.cpp
@@ -164,10 +164,10 @@
 
 sp<KeyCharacterMap> KeyCharacterMap::combine(const sp<KeyCharacterMap>& base,
         const sp<KeyCharacterMap>& overlay) {
-    if (overlay == NULL) {
+    if (overlay == nullptr) {
         return base;
     }
-    if (base == NULL) {
+    if (base == nullptr) {
         return overlay;
     }
 
@@ -468,7 +468,7 @@
 
         // Try to find the most general behavior that maps to this character.
         // For example, the base key behavior will usually be last in the list.
-        const Behavior* found = NULL;
+        const Behavior* found = nullptr;
         for (const Behavior* behavior = key->firstBehavior; behavior; behavior = behavior->next) {
             if (behavior->character == ch) {
                 found = behavior;
@@ -605,11 +605,11 @@
     map->mType = parcel->readInt32();
     size_t numKeys = parcel->readInt32();
     if (parcel->errorCheck()) {
-        return NULL;
+        return nullptr;
     }
     if (numKeys > MAX_KEYS) {
         ALOGE("Too many keys in KeyCharacterMap (%zu > %d)", numKeys, MAX_KEYS);
-        return NULL;
+        return nullptr;
     }
 
     for (size_t i = 0; i < numKeys; i++) {
@@ -617,7 +617,7 @@
         char16_t label = parcel->readInt32();
         char16_t number = parcel->readInt32();
         if (parcel->errorCheck()) {
-            return NULL;
+            return nullptr;
         }
 
         Key* key = new Key();
@@ -625,14 +625,14 @@
         key->number = number;
         map->mKeys.add(keyCode, key);
 
-        Behavior* lastBehavior = NULL;
+        Behavior* lastBehavior = nullptr;
         while (parcel->readInt32()) {
             int32_t metaState = parcel->readInt32();
             char16_t character = parcel->readInt32();
             int32_t fallbackKeyCode = parcel->readInt32();
             int32_t replacementKeyCode = parcel->readInt32();
             if (parcel->errorCheck()) {
-                return NULL;
+                return nullptr;
             }
 
             Behavior* behavior = new Behavior();
@@ -649,7 +649,7 @@
         }
 
         if (parcel->errorCheck()) {
-            return NULL;
+            return nullptr;
         }
     }
     return map;
@@ -666,7 +666,7 @@
         parcel->writeInt32(keyCode);
         parcel->writeInt32(key->label);
         parcel->writeInt32(key->number);
-        for (const Behavior* behavior = key->firstBehavior; behavior != NULL;
+        for (const Behavior* behavior = key->firstBehavior; behavior != nullptr;
                 behavior = behavior->next) {
             parcel->writeInt32(1);
             parcel->writeInt32(behavior->metaState);
@@ -683,12 +683,12 @@
 // --- KeyCharacterMap::Key ---
 
 KeyCharacterMap::Key::Key() :
-        label(0), number(0), firstBehavior(NULL) {
+        label(0), number(0), firstBehavior(nullptr) {
 }
 
 KeyCharacterMap::Key::Key(const Key& other) :
         label(other.label), number(other.number),
-        firstBehavior(other.firstBehavior ? new Behavior(*other.firstBehavior) : NULL) {
+        firstBehavior(other.firstBehavior ? new Behavior(*other.firstBehavior) : nullptr) {
 }
 
 KeyCharacterMap::Key::~Key() {
@@ -704,11 +704,11 @@
 // --- KeyCharacterMap::Behavior ---
 
 KeyCharacterMap::Behavior::Behavior() :
-        next(NULL), metaState(0), character(0), fallbackKeyCode(0), replacementKeyCode(0) {
+        next(nullptr), metaState(0), character(0), fallbackKeyCode(0), replacementKeyCode(0) {
 }
 
 KeyCharacterMap::Behavior::Behavior(const Behavior& other) :
-        next(other.next ? new Behavior(*other.next) : NULL),
+        next(other.next ? new Behavior(*other.next) : nullptr),
         metaState(other.metaState), character(other.character),
         fallbackKeyCode(other.fallbackKeyCode),
         replacementKeyCode(other.replacementKeyCode) {
diff --git a/libs/input/KeyLayoutMap.cpp b/libs/input/KeyLayoutMap.cpp
index 2b2f13e..c440078 100644
--- a/libs/input/KeyLayoutMap.cpp
+++ b/libs/input/KeyLayoutMap.cpp
@@ -117,7 +117,7 @@
             return &mKeysByScanCode.valueAt(index);
         }
     }
-    return NULL;
+    return nullptr;
 }
 
 status_t KeyLayoutMap::findScanCodesForKey(int32_t keyCode, Vector<int32_t>* outScanCodes) const {
diff --git a/libs/input/VelocityTracker.cpp b/libs/input/VelocityTracker.cpp
index 496158b..118f3aa 100644
--- a/libs/input/VelocityTracker.cpp
+++ b/libs/input/VelocityTracker.cpp
@@ -115,7 +115,7 @@
 
     // Allow the default strategy to be overridden using a system property for debugging.
     if (!strategy) {
-        int length = property_get("persist.input.velocitytracker.strategy", value, NULL);
+        int length = property_get("persist.input.velocitytracker.strategy", value, nullptr);
         if (length > 0) {
             strategy = value;
         } else {
@@ -139,7 +139,7 @@
 
 bool VelocityTracker::configureStrategy(const char* strategy) {
     mStrategy = createStrategy(strategy);
-    return mStrategy != NULL;
+    return mStrategy != nullptr;
 }
 
 VelocityTrackerStrategy* VelocityTracker::createStrategy(const char* strategy) {
@@ -204,7 +204,7 @@
         // time to adjust to changes in direction.
         return new LegacyVelocityTrackerStrategy();
     }
-    return NULL;
+    return nullptr;
 }
 
 void VelocityTracker::clear() {
diff --git a/libs/input/VirtualKeyMap.cpp b/libs/input/VirtualKeyMap.cpp
index 28ea717..9932973 100644
--- a/libs/input/VirtualKeyMap.cpp
+++ b/libs/input/VirtualKeyMap.cpp
@@ -47,7 +47,7 @@
 }
 
 status_t VirtualKeyMap::load(const String8& filename, VirtualKeyMap** outMap) {
-    *outMap = NULL;
+    *outMap = nullptr;
 
     Tokenizer* tokenizer;
     status_t status = Tokenizer::open(filename, &tokenizer);
diff --git a/libs/input/tests/InputPublisherAndConsumer_test.cpp b/libs/input/tests/InputPublisherAndConsumer_test.cpp
index 13617bf..0788c89 100644
--- a/libs/input/tests/InputPublisherAndConsumer_test.cpp
+++ b/libs/input/tests/InputPublisherAndConsumer_test.cpp
@@ -46,12 +46,12 @@
     virtual void TearDown() {
         if (mPublisher) {
             delete mPublisher;
-            mPublisher = NULL;
+            mPublisher = nullptr;
         }
 
         if (mConsumer) {
             delete mConsumer;
-            mConsumer = NULL;
+            mConsumer = nullptr;
         }
 
         serverChannel.clear();
@@ -94,7 +94,7 @@
     ASSERT_EQ(OK, status)
             << "consumer consume should return OK";
 
-    ASSERT_TRUE(event != NULL)
+    ASSERT_TRUE(event != nullptr)
             << "consumer should have returned non-NULL event";
     ASSERT_EQ(AINPUT_EVENT_TYPE_KEY, event->getType())
             << "consumer should have returned a key event";
@@ -180,7 +180,7 @@
     ASSERT_EQ(OK, status)
             << "consumer consume should return OK";
 
-    ASSERT_TRUE(event != NULL)
+    ASSERT_TRUE(event != nullptr)
             << "consumer should have returned non-NULL event";
     ASSERT_EQ(AINPUT_EVENT_TYPE_MOTION, event->getType())
             << "consumer should have returned a motion event";