diff --git a/libs/binder/include/binder/Binder.h b/libs/binder/include/binder/Binder.h
index 3404881..0b60b4e 100644
--- a/libs/binder/include/binder/Binder.h
+++ b/libs/binder/include/binder/Binder.h
@@ -40,13 +40,13 @@
                                     uint32_t flags = 0);
 
     virtual status_t    linkToDeath(const sp<DeathRecipient>& recipient,
-                                    void* cookie = NULL,
+                                    void* cookie = nullptr,
                                     uint32_t flags = 0);
 
     virtual status_t    unlinkToDeath(  const wp<DeathRecipient>& recipient,
-                                        void* cookie = NULL,
+                                        void* cookie = nullptr,
                                         uint32_t flags = 0,
-                                        wp<DeathRecipient>* outRecipient = NULL);
+                                        wp<DeathRecipient>* outRecipient = nullptr);
 
     virtual void        attachObject(   const void* objectID,
                                         void* object,
diff --git a/libs/binder/include/binder/BpBinder.h b/libs/binder/include/binder/BpBinder.h
index 8bd297b..c4c8ba3 100644
--- a/libs/binder/include/binder/BpBinder.h
+++ b/libs/binder/include/binder/BpBinder.h
@@ -47,12 +47,12 @@
                                     uint32_t flags = 0);
 
     virtual status_t    linkToDeath(const sp<DeathRecipient>& recipient,
-                                    void* cookie = NULL,
+                                    void* cookie = nullptr,
                                     uint32_t flags = 0);
     virtual status_t    unlinkToDeath(  const wp<DeathRecipient>& recipient,
-                                        void* cookie = NULL,
+                                        void* cookie = nullptr,
                                         uint32_t flags = 0,
-                                        wp<DeathRecipient>* outRecipient = NULL);
+                                        wp<DeathRecipient>* outRecipient = nullptr);
 
     virtual void        attachObject(   const void* objectID,
                                         void* object,
diff --git a/libs/binder/include/binder/Debug.h b/libs/binder/include/binder/Debug.h
index be0266c..58e2b32 100644
--- a/libs/binder/include/binder/Debug.h
+++ b/libs/binder/include/binder/Debug.h
@@ -31,12 +31,12 @@
 typedef void (*debugPrintFunc)(void* cookie, const char* txt);
 
 void printTypeCode(uint32_t typeCode,
-    debugPrintFunc func = 0, void* cookie = 0);
+    debugPrintFunc func = nullptr, void* cookie = nullptr);
 
 void printHexData(int32_t indent, const void *buf, size_t length,
     size_t bytesPerLine=16, int32_t singleLineBytesCutoff=16,
     size_t alignment=0, bool cArrayStyle=false,
-    debugPrintFunc func = 0, void* cookie = 0);
+    debugPrintFunc func = nullptr, void* cookie = nullptr);
 
 
 ssize_t getBinderKernelReferences(size_t count, uintptr_t* buf);
diff --git a/libs/binder/include/binder/IBinder.h b/libs/binder/include/binder/IBinder.h
index 2e62957..318070a 100644
--- a/libs/binder/include/binder/IBinder.h
+++ b/libs/binder/include/binder/IBinder.h
@@ -132,7 +132,7 @@
      * directly do with it now that it has passed on.)
      */
     virtual status_t        linkToDeath(const sp<DeathRecipient>& recipient,
-                                        void* cookie = NULL,
+                                        void* cookie = nullptr,
                                         uint32_t flags = 0) = 0;
 
     /**
@@ -143,9 +143,9 @@
      * added with that cookie will be unlinked.
      */
     virtual status_t        unlinkToDeath(  const wp<DeathRecipient>& recipient,
-                                            void* cookie = NULL,
+                                            void* cookie = nullptr,
                                             uint32_t flags = 0,
-                                            wp<DeathRecipient>* outRecipient = NULL) = 0;
+                                            wp<DeathRecipient>* outRecipient = nullptr) = 0;
 
     virtual bool            checkSubclass(const void* subclassID) const;
 
diff --git a/libs/binder/include/binder/IInterface.h b/libs/binder/include/binder/IInterface.h
index 227d0ae..01c5161 100644
--- a/libs/binder/include/binder/IInterface.h
+++ b/libs/binder/include/binder/IInterface.h
@@ -116,7 +116,7 @@
         const String16& _descriptor)
 {
     if (_descriptor == INTERFACE::descriptor) return this;
-    return NULL;
+    return nullptr;
 }
 
 template<typename INTERFACE>
diff --git a/libs/binder/include/binder/IMemory.h b/libs/binder/include/binder/IMemory.h
index 15a104f..3099bf5 100644
--- a/libs/binder/include/binder/IMemory.h
+++ b/libs/binder/include/binder/IMemory.h
@@ -72,7 +72,7 @@
 public:
     DECLARE_META_INTERFACE(Memory)
 
-    virtual sp<IMemoryHeap> getMemory(ssize_t* offset=0, size_t* size=0) const = 0;
+    virtual sp<IMemoryHeap> getMemory(ssize_t* offset=nullptr, size_t* size=nullptr) const = 0;
 
     // helpers
     void* fastPointer(const sp<IBinder>& heap, ssize_t offset) const;
diff --git a/libs/binder/include/binder/IPCThreadState.h b/libs/binder/include/binder/IPCThreadState.h
index c1d9a9a..dce3f38 100644
--- a/libs/binder/include/binder/IPCThreadState.h
+++ b/libs/binder/include/binder/IPCThreadState.h
@@ -95,7 +95,7 @@
 
             status_t            sendReply(const Parcel& reply, uint32_t flags);
             status_t            waitForResponse(Parcel *reply,
-                                                status_t *acquireResult=NULL);
+                                                status_t *acquireResult=nullptr);
             status_t            talkWithDriver(bool doReceive=true);
             status_t            writeTransactionData(int32_t cmd,
                                                      uint32_t binderFlags,
diff --git a/libs/binder/include/binder/IServiceManager.h b/libs/binder/include/binder/IServiceManager.h
index 197026d..1d39aa3 100644
--- a/libs/binder/include/binder/IServiceManager.h
+++ b/libs/binder/include/binder/IServiceManager.h
@@ -84,9 +84,9 @@
 status_t getService(const String16& name, sp<INTERFACE>* outService)
 {
     const sp<IServiceManager> sm = defaultServiceManager();
-    if (sm != NULL) {
+    if (sm != nullptr) {
         *outService = interface_cast<INTERFACE>(sm->getService(name));
-        if ((*outService) != NULL) return NO_ERROR;
+        if ((*outService) != nullptr) return NO_ERROR;
     }
     return NAME_NOT_FOUND;
 }
diff --git a/libs/binder/include/binder/MemoryDealer.h b/libs/binder/include/binder/MemoryDealer.h
index 60a624c..fe5a31d 100644
--- a/libs/binder/include/binder/MemoryDealer.h
+++ b/libs/binder/include/binder/MemoryDealer.h
@@ -34,7 +34,7 @@
 class MemoryDealer : public RefBase
 {
 public:
-    MemoryDealer(size_t size, const char* name = 0,
+    MemoryDealer(size_t size, const char* name = nullptr,
             uint32_t flags = 0 /* or bits such as MemoryHeapBase::READ_ONLY */ );
 
     virtual sp<IMemory> allocate(size_t size);
diff --git a/libs/binder/include/binder/MemoryHeapBase.h b/libs/binder/include/binder/MemoryHeapBase.h
index ea9b66c..5e0a382 100644
--- a/libs/binder/include/binder/MemoryHeapBase.h
+++ b/libs/binder/include/binder/MemoryHeapBase.h
@@ -52,7 +52,7 @@
     /*
      * maps memory from ashmem, with the given name for debugging
      */
-    MemoryHeapBase(size_t size, uint32_t flags = 0, char const* name = NULL);
+    MemoryHeapBase(size_t size, uint32_t flags = 0, char const* name = nullptr);
 
     virtual ~MemoryHeapBase();
 
@@ -74,7 +74,7 @@
     /* this is only needed as a workaround, use only if you know
      * what you are doing */
     status_t setDevice(const char* device) {
-        if (mDevice == 0)
+        if (mDevice == nullptr)
             mDevice = device;
         return mDevice ? NO_ERROR : ALREADY_EXISTS;
     }
@@ -83,7 +83,7 @@
             MemoryHeapBase();
     // init() takes ownership of fd
     status_t init(int fd, void *base, int size,
-            int flags = 0, const char* device = NULL);
+            int flags = 0, const char* device = nullptr);
 
 private:
     status_t mapfd(int fd, size_t size, uint32_t offset = 0);
diff --git a/libs/binder/include/binder/Parcel.h b/libs/binder/include/binder/Parcel.h
index c5fede6..c9c273a 100644
--- a/libs/binder/include/binder/Parcel.h
+++ b/libs/binder/include/binder/Parcel.h
@@ -91,7 +91,7 @@
     // IPCThreadState, which as an optimization may optionally be
     // passed in.
     bool                enforceInterface(const String16& interface,
-                                         IPCThreadState* threadState = NULL) const;
+                                         IPCThreadState* threadState = nullptr) const;
     bool                checkInterface(IBinder*) const;
 
     void                freeData();
@@ -554,7 +554,7 @@
         friend class Parcel;
     public:
         inline const void* data() const { return mData; }
-        inline void* mutableData() { return isMutable() ? mData : NULL; }
+        inline void* mutableData() { return isMutable() ? mData : nullptr; }
     };
 
     class WritableBlob : public Blob {
@@ -594,7 +594,7 @@
     }
     if (size) {
         void* buffer = writeInplace(size);
-        if (buffer == NULL)
+        if (buffer == nullptr)
             return NO_MEMORY;
         return val.flatten(buffer, size);
     }
@@ -622,7 +622,7 @@
     }
     if (size) {
         void const* buffer = readInplace(size);
-        return buffer == NULL ? NO_MEMORY :
+        return buffer == nullptr ? NO_MEMORY :
                 val.unflatten(buffer, size);
     }
     return NO_ERROR;
diff --git a/libs/binder/tests/binderLibTest.cpp b/libs/binder/tests/binderLibTest.cpp
index f23ac52..73c2eba 100644
--- a/libs/binder/tests/binderLibTest.cpp
+++ b/libs/binder/tests/binderLibTest.cpp
@@ -1189,7 +1189,7 @@
                     return ret;
                 }
                 buf = data.readInplace(size);
-                if (buf == NULL) {
+                if (buf == nullptr) {
                     return BAD_VALUE;
                 }
                 ret = write(fd.get(), buf, size);