diff --git a/libs/gui/Android.bp b/libs/gui/Android.bp
index 8f9c38a..a1b4abc 100644
--- a/libs/gui/Android.bp
+++ b/libs/gui/Android.bp
@@ -38,10 +38,6 @@
         // Don't warn about struct padding
         "-Wno-padded",
 
-        // android/sensors.h uses nested anonymous unions and anonymous structs
-        "-Wno-nested-anon-types",
-        "-Wno-gnu-anonymous-struct",
-
         // We are aware of the risks inherent in comparing floats for equality
         "-Wno-float-equal",
 
@@ -61,8 +57,6 @@
     },
 
     srcs: [
-        "IGraphicBufferConsumer.cpp",
-        "IConsumerListener.cpp",
         "BitTube.cpp",
         "BufferItem.cpp",
         "BufferItemConsumer.cpp",
@@ -79,18 +73,15 @@
         "GraphicBufferAlloc.cpp",
         "GuiConfig.cpp",
         "IDisplayEventConnection.cpp",
+        "IConsumerListener.cpp",
         "IGraphicBufferAlloc.cpp",
+        "IGraphicBufferConsumer.cpp",
         "IGraphicBufferProducer.cpp",
         "IProducerListener.cpp",
-        "ISensorEventConnection.cpp",
-        "ISensorServer.cpp",
         "ISurfaceComposer.cpp",
         "ISurfaceComposerClient.cpp",
         "LayerState.cpp",
         "OccupancyTracker.cpp",
-        "Sensor.cpp",
-        "SensorEventQueue.cpp",
-        "SensorManager.cpp",
         "StreamSplitter.cpp",
         "Surface.cpp",
         "SurfaceControl.cpp",
diff --git a/libs/gui/BitTube.cpp b/libs/gui/BitTube.cpp
index b653c5b..51a8d67 100644
--- a/libs/gui/BitTube.cpp
+++ b/libs/gui/BitTube.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include <private/gui/BitTube.h>
+
 #include <stdint.h>
 #include <sys/types.h>
 #include <sys/socket.h>
@@ -25,7 +27,6 @@
 
 #include <binder/Parcel.h>
 
-#include <gui/BitTube.h>
 
 namespace android {
 // ----------------------------------------------------------------------------
diff --git a/libs/gui/DisplayEventReceiver.cpp b/libs/gui/DisplayEventReceiver.cpp
index 9973e8d..07e07e0 100644
--- a/libs/gui/DisplayEventReceiver.cpp
+++ b/libs/gui/DisplayEventReceiver.cpp
@@ -18,13 +18,14 @@
 
 #include <utils/Errors.h>
 
-#include <gui/BitTube.h>
 #include <gui/DisplayEventReceiver.h>
 #include <gui/IDisplayEventConnection.h>
 #include <gui/ISurfaceComposer.h>
 
 #include <private/gui/ComposerService.h>
 
+#include <private/gui/BitTube.h>
+
 // ---------------------------------------------------------------------------
 
 namespace android {
diff --git a/libs/gui/IDisplayEventConnection.cpp b/libs/gui/IDisplayEventConnection.cpp
index b1d3b00..e5c3c48 100644
--- a/libs/gui/IDisplayEventConnection.cpp
+++ b/libs/gui/IDisplayEventConnection.cpp
@@ -15,17 +15,15 @@
  */
 
 #include <stdint.h>
-#include <sys/types.h>
 
 #include <utils/Errors.h>
 #include <utils/RefBase.h>
-#include <utils/Timers.h>
 
 #include <binder/Parcel.h>
-#include <binder/IInterface.h>
 
 #include <gui/IDisplayEventConnection.h>
-#include <gui/BitTube.h>
+
+#include <private/gui/BitTube.h>
 
 namespace android {
 // ----------------------------------------------------------------------------
diff --git a/libs/gui/tests/Android.bp b/libs/gui/tests/Android.bp
index 5944110..4492a08 100644
--- a/libs/gui/tests/Android.bp
+++ b/libs/gui/tests/Android.bp
@@ -14,7 +14,6 @@
         "GLTest.cpp",
         "IGraphicBufferProducer_test.cpp",
         "MultiTextureConsumer_test.cpp",
-        "Sensor_test.cpp",
         "StreamSplitter_test.cpp",
         "SurfaceTextureClient_test.cpp",
         "SurfaceTextureFBO_test.cpp",
diff --git a/libs/sensor/Android.bp b/libs/sensor/Android.bp
new file mode 100644
index 0000000..171a627
--- /dev/null
+++ b/libs/sensor/Android.bp
@@ -0,0 +1,61 @@
+// Copyright 2010 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+cc_library_shared {
+    name: "libsensor",
+
+    clang: true,
+    cppflags: [
+        "-Weverything",
+        "-Werror",
+
+        // The static constructors and destructors in this library have not been noted to
+        // introduce significant overheads
+        "-Wno-exit-time-destructors",
+        "-Wno-global-constructors",
+
+        // We only care about compiling as C++14
+        "-Wno-c++98-compat-pedantic",
+
+        // android/sensors.h uses nested anonymous unions and anonymous structs
+        "-Wno-nested-anon-types",
+        "-Wno-gnu-anonymous-struct",
+
+        // Don't warn about struct padding
+        "-Wno-padded",
+    ],
+
+    srcs: [
+        "BitTube.cpp",
+        "ISensorEventConnection.cpp",
+        "ISensorServer.cpp",
+        "Sensor.cpp",
+        "SensorEventQueue.cpp",
+        "SensorManager.cpp",
+    ],
+
+    shared_libs: [
+        "libbinder",
+        "libcutils",
+        "libutils",
+        "liblog",
+        "libhardware",
+    ],
+
+    export_include_dirs: ["include"],
+
+    export_shared_lib_headers: ["libbinder", "libhardware"],
+}
+
+subdirs = ["tests"]
diff --git a/libs/sensor/BitTube.cpp b/libs/sensor/BitTube.cpp
new file mode 100644
index 0000000..93555c8
--- /dev/null
+++ b/libs/sensor/BitTube.cpp
@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <sensor/BitTube.h>
+
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <binder/Parcel.h>
+
+namespace android {
+// ----------------------------------------------------------------------------
+
+// Socket buffer size.  The default is typically about 128KB, which is much larger than
+// we really need.  So we make it smaller.
+static const size_t DEFAULT_SOCKET_BUFFER_SIZE = 4 * 1024;
+
+
+BitTube::BitTube()
+    : mSendFd(-1), mReceiveFd(-1)
+{
+    init(DEFAULT_SOCKET_BUFFER_SIZE, DEFAULT_SOCKET_BUFFER_SIZE);
+}
+
+BitTube::BitTube(size_t bufsize)
+    : mSendFd(-1), mReceiveFd(-1)
+{
+    init(bufsize, bufsize);
+}
+
+BitTube::BitTube(const Parcel& data)
+    : mSendFd(-1), mReceiveFd(-1)
+{
+    mReceiveFd = dup(data.readFileDescriptor());
+    if (mReceiveFd < 0) {
+        mReceiveFd = -errno;
+        ALOGE("BitTube(Parcel): can't dup filedescriptor (%s)",
+                strerror(-mReceiveFd));
+    }
+}
+
+BitTube::~BitTube()
+{
+    if (mSendFd >= 0)
+        close(mSendFd);
+
+    if (mReceiveFd >= 0)
+        close(mReceiveFd);
+}
+
+void BitTube::init(size_t rcvbuf, size_t sndbuf) {
+    int sockets[2];
+    if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, sockets) == 0) {
+        size_t size = DEFAULT_SOCKET_BUFFER_SIZE;
+        setsockopt(sockets[0], SOL_SOCKET, SO_RCVBUF, &rcvbuf, sizeof(rcvbuf));
+        setsockopt(sockets[1], SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf));
+        // sine we don't use the "return channel", we keep it small...
+        setsockopt(sockets[0], SOL_SOCKET, SO_SNDBUF, &size, sizeof(size));
+        setsockopt(sockets[1], SOL_SOCKET, SO_RCVBUF, &size, sizeof(size));
+        fcntl(sockets[0], F_SETFL, O_NONBLOCK);
+        fcntl(sockets[1], F_SETFL, O_NONBLOCK);
+        mReceiveFd = sockets[0];
+        mSendFd = sockets[1];
+    } else {
+        mReceiveFd = -errno;
+        ALOGE("BitTube: pipe creation failed (%s)", strerror(-mReceiveFd));
+    }
+}
+
+status_t BitTube::initCheck() const
+{
+    if (mReceiveFd < 0) {
+        return status_t(mReceiveFd);
+    }
+    return NO_ERROR;
+}
+
+int BitTube::getFd() const
+{
+    return mReceiveFd;
+}
+
+int BitTube::getSendFd() const
+{
+    return mSendFd;
+}
+
+ssize_t BitTube::write(void const* vaddr, size_t size)
+{
+    ssize_t err, len;
+    do {
+        len = ::send(mSendFd, vaddr, size, MSG_DONTWAIT | MSG_NOSIGNAL);
+        // cannot return less than size, since we're using SOCK_SEQPACKET
+        err = len < 0 ? errno : 0;
+    } while (err == EINTR);
+    return err == 0 ? len : -err;
+}
+
+ssize_t BitTube::read(void* vaddr, size_t size)
+{
+    ssize_t err, len;
+    do {
+        len = ::recv(mReceiveFd, vaddr, size, MSG_DONTWAIT);
+        err = len < 0 ? errno : 0;
+    } while (err == EINTR);
+    if (err == EAGAIN || err == EWOULDBLOCK) {
+        // EAGAIN means that we have non-blocking I/O but there was
+        // no data to be read. Nothing the client should care about.
+        return 0;
+    }
+    return err == 0 ? len : -err;
+}
+
+status_t BitTube::writeToParcel(Parcel* reply) const
+{
+    if (mReceiveFd < 0)
+        return -EINVAL;
+
+    status_t result = reply->writeDupFileDescriptor(mReceiveFd);
+    close(mReceiveFd);
+    mReceiveFd = -1;
+    return result;
+}
+
+
+ssize_t BitTube::sendObjects(const sp<BitTube>& tube,
+        void const* events, size_t count, size_t objSize)
+{
+    const char* vaddr = reinterpret_cast<const char*>(events);
+    ssize_t size = tube->write(vaddr, count*objSize);
+
+    // should never happen because of SOCK_SEQPACKET
+    LOG_ALWAYS_FATAL_IF((size >= 0) && (size % static_cast<ssize_t>(objSize)),
+            "BitTube::sendObjects(count=%zu, size=%zu), res=%zd (partial events were sent!)",
+            count, objSize, size);
+
+    //ALOGE_IF(size<0, "error %d sending %d events", size, count);
+    return size < 0 ? size : size / static_cast<ssize_t>(objSize);
+}
+
+ssize_t BitTube::recvObjects(const sp<BitTube>& tube,
+        void* events, size_t count, size_t objSize)
+{
+    char* vaddr = reinterpret_cast<char*>(events);
+    ssize_t size = tube->read(vaddr, count*objSize);
+
+    // should never happen because of SOCK_SEQPACKET
+    LOG_ALWAYS_FATAL_IF((size >= 0) && (size % static_cast<ssize_t>(objSize)),
+            "BitTube::recvObjects(count=%zu, size=%zu), res=%zd (partial events were received!)",
+            count, objSize, size);
+
+    //ALOGE_IF(size<0, "error %d receiving %d events", size, count);
+    return size < 0 ? size : size / static_cast<ssize_t>(objSize);
+}
+
+// ----------------------------------------------------------------------------
+}; // namespace android
diff --git a/libs/gui/ISensorEventConnection.cpp b/libs/sensor/ISensorEventConnection.cpp
similarity index 98%
rename from libs/gui/ISensorEventConnection.cpp
rename to libs/sensor/ISensorEventConnection.cpp
index 8af51c5..8a3a623 100644
--- a/libs/gui/ISensorEventConnection.cpp
+++ b/libs/sensor/ISensorEventConnection.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include <sensor/ISensorEventConnection.h>
+
 #include <stdint.h>
 #include <sys/types.h>
 
@@ -24,8 +26,7 @@
 #include <binder/Parcel.h>
 #include <binder/IInterface.h>
 
-#include <gui/ISensorEventConnection.h>
-#include <gui/BitTube.h>
+#include <sensor/BitTube.h>
 
 namespace android {
 // ----------------------------------------------------------------------------
diff --git a/libs/gui/ISensorServer.cpp b/libs/sensor/ISensorServer.cpp
similarity index 98%
rename from libs/gui/ISensorServer.cpp
rename to libs/sensor/ISensorServer.cpp
index aea7403..f41f187 100644
--- a/libs/gui/ISensorServer.cpp
+++ b/libs/sensor/ISensorServer.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include <sensor/ISensorServer.h>
+
 #include <stdint.h>
 #include <sys/types.h>
 
@@ -26,9 +28,8 @@
 #include <binder/Parcel.h>
 #include <binder/IInterface.h>
 
-#include <gui/Sensor.h>
-#include <gui/ISensorServer.h>
-#include <gui/ISensorEventConnection.h>
+#include <sensor/Sensor.h>
+#include <sensor/ISensorEventConnection.h>
 
 namespace android {
 // ----------------------------------------------------------------------------
diff --git a/libs/gui/Sensor.cpp b/libs/sensor/Sensor.cpp
similarity index 98%
rename from libs/gui/Sensor.cpp
rename to libs/sensor/Sensor.cpp
index e2f733a..c2d477e 100644
--- a/libs/gui/Sensor.cpp
+++ b/libs/sensor/Sensor.cpp
@@ -14,19 +14,13 @@
  * limitations under the License.
  */
 
+#include <sensor/Sensor.h>
+
 #include <inttypes.h>
-#include <stdint.h>
-#include <sys/limits.h>
-#include <sys/types.h>
 
 #include <binder/AppOpsManager.h>
+#include <binder/IPermissionController.h>
 #include <binder/IServiceManager.h>
-#include <gui/Sensor.h>
-#include <hardware/sensors.h>
-#include <log/log.h>
-#include <utils/Errors.h>
-#include <utils/String8.h>
-#include <utils/Flattenable.h>
 
 // ----------------------------------------------------------------------------
 namespace android {
@@ -51,7 +45,7 @@
     mHandle = hwSensor.handle;
     mType = hwSensor.type;
     mMinValue = 0;                      // FIXME: minValue
-    mMaxValue = hwSensor.maxRange;     // FIXME: maxValue
+    mMaxValue = hwSensor.maxRange;      // FIXME: maxValue
     mResolution = hwSensor.resolution;
     mPower = hwSensor.power;
     mMinDelay = hwSensor.minDelay;
diff --git a/libs/gui/SensorEventQueue.cpp b/libs/sensor/SensorEventQueue.cpp
similarity index 96%
rename from libs/gui/SensorEventQueue.cpp
rename to libs/sensor/SensorEventQueue.cpp
index 6d69839..8ba3ebe 100644
--- a/libs/gui/SensorEventQueue.cpp
+++ b/libs/sensor/SensorEventQueue.cpp
@@ -16,20 +16,17 @@
 
 #define LOG_TAG "Sensors"
 
-#include <algorithm>
-#include <stdint.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <linux/errno.h>
+#include <sensor/SensorEventQueue.h>
 
-#include <utils/Errors.h>
+#include <algorithm>
+#include <sys/socket.h>
+
 #include <utils/RefBase.h>
 #include <utils/Looper.h>
 
-#include <gui/Sensor.h>
-#include <gui/BitTube.h>
-#include <gui/SensorEventQueue.h>
-#include <gui/ISensorEventConnection.h>
+#include <sensor/Sensor.h>
+#include <sensor/BitTube.h>
+#include <sensor/ISensorEventConnection.h>
 
 #include <android/sensor.h>
 
diff --git a/libs/gui/SensorManager.cpp b/libs/sensor/SensorManager.cpp
similarity index 98%
rename from libs/gui/SensorManager.cpp
rename to libs/sensor/SensorManager.cpp
index 513b889..b6e9fa1 100644
--- a/libs/gui/SensorManager.cpp
+++ b/libs/sensor/SensorManager.cpp
@@ -16,6 +16,8 @@
 
 #define LOG_TAG "Sensors"
 
+#include <sensor/SensorManager.h>
+
 #include <stdint.h>
 #include <sys/types.h>
 
@@ -27,11 +29,10 @@
 #include <binder/IBinder.h>
 #include <binder/IServiceManager.h>
 
-#include <gui/ISensorServer.h>
-#include <gui/ISensorEventConnection.h>
-#include <gui/Sensor.h>
-#include <gui/SensorManager.h>
-#include <gui/SensorEventQueue.h>
+#include <sensor/ISensorServer.h>
+#include <sensor/ISensorEventConnection.h>
+#include <sensor/Sensor.h>
+#include <sensor/SensorEventQueue.h>
 
 // ----------------------------------------------------------------------------
 namespace android {
diff --git a/libs/sensor/include/sensor/BitTube.h b/libs/sensor/include/sensor/BitTube.h
new file mode 100644
index 0000000..c1fabe8
--- /dev/null
+++ b/libs/sensor/include/sensor/BitTube.h
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+
+namespace android {
+// ----------------------------------------------------------------------------
+class Parcel;
+
+class BitTube : public RefBase
+{
+public:
+
+    // creates a BitTube with a default (4KB) send buffer
+    BitTube();
+
+    // creates a BitTube with a a specified send and receive buffer size
+    explicit BitTube(size_t bufsize);
+
+    explicit BitTube(const Parcel& data);
+    virtual ~BitTube();
+
+    // check state after construction
+    status_t initCheck() const;
+
+    // get receive file-descriptor
+    int getFd() const;
+
+    // get the send file-descriptor.
+    int getSendFd() const;
+
+    // send objects (sized blobs). All objects are guaranteed to be written or the call fails.
+    template <typename T>
+    static ssize_t sendObjects(const sp<BitTube>& tube,
+            T const* events, size_t count) {
+        return sendObjects(tube, events, count, sizeof(T));
+    }
+
+    // receive objects (sized blobs). If the receiving buffer isn't large enough,
+    // excess messages are silently discarded.
+    template <typename T>
+    static ssize_t recvObjects(const sp<BitTube>& tube,
+            T* events, size_t count) {
+        return recvObjects(tube, events, count, sizeof(T));
+    }
+
+    // parcels this BitTube
+    status_t writeToParcel(Parcel* reply) const;
+
+private:
+    void init(size_t rcvbuf, size_t sndbuf);
+
+    // send a message. The write is guaranteed to send the whole message or fail.
+    ssize_t write(void const* vaddr, size_t size);
+
+    // receive a message. the passed buffer must be at least as large as the
+    // write call used to send the message, excess data is silently discarded.
+    ssize_t read(void* vaddr, size_t size);
+
+    int mSendFd;
+    mutable int mReceiveFd;
+
+    static ssize_t sendObjects(const sp<BitTube>& tube,
+            void const* events, size_t count, size_t objSize);
+
+    static ssize_t recvObjects(const sp<BitTube>& tube,
+            void* events, size_t count, size_t objSize);
+};
+
+// ----------------------------------------------------------------------------
+}; // namespace android
diff --git a/libs/sensor/include/sensor/ISensorEventConnection.h b/libs/sensor/include/sensor/ISensorEventConnection.h
new file mode 100644
index 0000000..07cc7e8
--- /dev/null
+++ b/libs/sensor/include/sensor/ISensorEventConnection.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/StrongPointer.h>
+#include <utils/Timers.h>
+
+#include <binder/IInterface.h>
+
+namespace android {
+// ----------------------------------------------------------------------------
+
+class BitTube;
+class Parcel;
+
+class ISensorEventConnection : public IInterface
+{
+public:
+    DECLARE_META_INTERFACE(SensorEventConnection)
+
+    virtual sp<BitTube> getSensorChannel() const = 0;
+    virtual status_t enableDisable(int handle, bool enabled, nsecs_t samplingPeriodNs,
+                                   nsecs_t maxBatchReportLatencyNs, int reservedFlags) = 0;
+    virtual status_t setEventRate(int handle, nsecs_t ns) = 0;
+    virtual status_t flush() = 0;
+    virtual int32_t configureChannel(int32_t handle, int32_t rateLevel) = 0;
+};
+
+// ----------------------------------------------------------------------------
+
+class BnSensorEventConnection : public BnInterface<ISensorEventConnection>
+{
+public:
+    virtual status_t    onTransact( uint32_t code,
+                                    const Parcel& data,
+                                    Parcel* reply,
+                                    uint32_t flags = 0);
+};
+
+// ----------------------------------------------------------------------------
+}; // namespace android
diff --git a/libs/sensor/include/sensor/ISensorServer.h b/libs/sensor/include/sensor/ISensorServer.h
new file mode 100644
index 0000000..f922307
--- /dev/null
+++ b/libs/sensor/include/sensor/ISensorServer.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/StrongPointer.h>
+#include <utils/Vector.h>
+
+#include <binder/IInterface.h>
+
+struct native_handle;
+typedef struct native_handle native_handle_t;
+namespace android {
+// ----------------------------------------------------------------------------
+
+class ISensorEventConnection;
+class Parcel;
+class Sensor;
+class String8;
+class String16;
+
+class ISensorServer : public IInterface
+{
+public:
+    DECLARE_META_INTERFACE(SensorServer)
+
+    virtual Vector<Sensor> getSensorList(const String16& opPackageName) = 0;
+    virtual Vector<Sensor> getDynamicSensorList(const String16& opPackageName) = 0;
+
+    virtual sp<ISensorEventConnection> createSensorEventConnection(const String8& packageName,
+             int mode, const String16& opPackageName) = 0;
+    virtual int32_t isDataInjectionEnabled() = 0;
+
+    virtual sp<ISensorEventConnection> createSensorDirectConnection(const String16& opPackageName,
+            uint32_t size, int32_t type, int32_t format, const native_handle_t *resource) = 0;
+};
+
+// ----------------------------------------------------------------------------
+
+class BnSensorServer : public BnInterface<ISensorServer>
+{
+public:
+    virtual status_t    onTransact( uint32_t code,
+                                    const Parcel& data,
+                                    Parcel* reply,
+                                    uint32_t flags = 0);
+};
+
+// ----------------------------------------------------------------------------
+}; // namespace android
diff --git a/libs/sensor/include/sensor/Sensor.h b/libs/sensor/include/sensor/Sensor.h
new file mode 100644
index 0000000..043e635
--- /dev/null
+++ b/libs/sensor/include/sensor/Sensor.h
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/Flattenable.h>
+#include <utils/String8.h>
+#include <utils/Timers.h>
+
+// FIXME: including from android/ breaks layering, as libandroid ultimately depends on libsensors
+#include <android/sensor.h>
+
+#include <hardware/sensors.h>
+
+// ----------------------------------------------------------------------------
+// Concrete types for the NDK
+struct ASensor { };
+
+// ----------------------------------------------------------------------------
+namespace android {
+// ----------------------------------------------------------------------------
+
+class Parcel;
+
+// ----------------------------------------------------------------------------
+
+class Sensor : public ASensor, public LightFlattenable<Sensor>
+{
+public:
+    enum {
+        TYPE_ACCELEROMETER  = ASENSOR_TYPE_ACCELEROMETER,
+        TYPE_MAGNETIC_FIELD = ASENSOR_TYPE_MAGNETIC_FIELD,
+        TYPE_GYROSCOPE      = ASENSOR_TYPE_GYROSCOPE,
+        TYPE_LIGHT          = ASENSOR_TYPE_LIGHT,
+        TYPE_PROXIMITY      = ASENSOR_TYPE_PROXIMITY
+    };
+
+    struct uuid_t{
+        union {
+            uint8_t b[16];
+            int64_t i64[2];
+        };
+        uuid_t(const uint8_t (&uuid)[16]) { memcpy(b, uuid, sizeof(b));}
+        uuid_t() : b{0} {}
+    };
+
+    Sensor(const Sensor&) = default;
+    Sensor& operator=(const Sensor&) = default;
+
+    Sensor(const char * name = "");
+    Sensor(struct sensor_t const* hwSensor, int halVersion = 0);
+    Sensor(struct sensor_t const& hwSensor, const uuid_t& uuid, int halVersion = 0);
+    ~Sensor();
+
+    const String8& getName() const;
+    const String8& getVendor() const;
+    int32_t getHandle() const;
+    int32_t getType() const;
+    float getMinValue() const;
+    float getMaxValue() const;
+    float getResolution() const;
+    float getPowerUsage() const;
+    int32_t getMinDelay() const;
+    nsecs_t getMinDelayNs() const;
+    int32_t getVersion() const;
+    uint32_t getFifoReservedEventCount() const;
+    uint32_t getFifoMaxEventCount() const;
+    const String8& getStringType() const;
+    const String8& getRequiredPermission() const;
+    bool isRequiredPermissionRuntime() const;
+    int32_t getRequiredAppOp() const;
+    int32_t getMaxDelay() const;
+    uint32_t getFlags() const;
+    bool isWakeUpSensor() const;
+    bool isDynamicSensor() const;
+    bool hasAdditionalInfo() const;
+    int32_t getHighestDirectReportRateLevel() const;
+    bool isDirectChannelTypeSupported(int32_t sharedMemType) const;
+    int32_t getReportingMode() const;
+
+    // Note that after setId() has been called, getUuid() no longer
+    // returns the UUID.
+    // TODO(b/29547335): Remove getUuid(), add getUuidIndex(), and
+    //     make sure setId() doesn't change the UuidIndex.
+    const uuid_t& getUuid() const;
+    int32_t getId() const;
+    void setId(int32_t id);
+
+    // LightFlattenable protocol
+    inline bool isFixedSize() const { return false; }
+    size_t getFlattenedSize() const;
+    status_t flatten(void* buffer, size_t size) const;
+    status_t unflatten(void const* buffer, size_t size);
+
+private:
+    String8 mName;
+    String8 mVendor;
+    int32_t mHandle;
+    int32_t mType;
+    float   mMinValue;
+    float   mMaxValue;
+    float   mResolution;
+    float   mPower;
+    int32_t mMinDelay;
+    int32_t mVersion;
+    uint32_t mFifoReservedEventCount;
+    uint32_t mFifoMaxEventCount;
+    String8 mStringType;
+    String8 mRequiredPermission;
+    bool mRequiredPermissionRuntime = false;
+    int32_t mRequiredAppOp;
+    int32_t mMaxDelay;
+    uint32_t mFlags;
+    // TODO(b/29547335): Get rid of this field and replace with an index.
+    //     The index will be into a separate global vector of UUIDs.
+    //     Also add an mId field (and change flatten/unflatten appropriately).
+    uuid_t  mUuid;
+    static void flattenString8(void*& buffer, size_t& size, const String8& string8);
+    static bool unflattenString8(void const*& buffer, size_t& size, String8& outputString8);
+};
+
+// ----------------------------------------------------------------------------
+}; // namespace android
diff --git a/libs/sensor/include/sensor/SensorEventQueue.h b/libs/sensor/include/sensor/SensorEventQueue.h
new file mode 100644
index 0000000..84b6ab2
--- /dev/null
+++ b/libs/sensor/include/sensor/SensorEventQueue.h
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+#include <utils/Timers.h>
+#include <utils/Mutex.h>
+
+#include <sensor/BitTube.h>
+
+// ----------------------------------------------------------------------------
+#define WAKE_UP_SENSOR_EVENT_NEEDS_ACK (1U << 31)
+struct ALooper;
+struct ASensorEvent;
+
+// Concrete types for the NDK
+struct ASensorEventQueue {
+    ALooper* looper;
+};
+
+// ----------------------------------------------------------------------------
+namespace android {
+// ----------------------------------------------------------------------------
+
+class ISensorEventConnection;
+class Sensor;
+class Looper;
+
+// ----------------------------------------------------------------------------
+
+class SensorEventQueue : public ASensorEventQueue, public RefBase
+{
+public:
+
+    enum { MAX_RECEIVE_BUFFER_EVENT_COUNT = 256 };
+
+    /**
+     * Typical sensor delay (sample period) in microseconds.
+     */
+    // Fastest sampling, system will bound it to minDelay
+    static constexpr int32_t SENSOR_DELAY_FASTEST = 0;
+    // Typical sample period for game, 50Hz;
+    static constexpr int32_t SENSOR_DELAY_GAME = 20000;
+    // Typical sample period for UI, 15Hz
+    static constexpr int32_t SENSOR_DELAY_UI = 66667;
+    // Default sensor sample period
+    static constexpr int32_t SENSOR_DELAY_NORMAL = 200000;
+
+    SensorEventQueue(const sp<ISensorEventConnection>& connection);
+    virtual ~SensorEventQueue();
+    virtual void onFirstRef();
+
+    int getFd() const;
+
+    static ssize_t write(const sp<BitTube>& tube,
+            ASensorEvent const* events, size_t numEvents);
+
+    ssize_t read(ASensorEvent* events, size_t numEvents);
+
+    status_t waitForEvent() const;
+    status_t wake() const;
+
+    status_t enableSensor(Sensor const* sensor) const;
+    status_t enableSensor(Sensor const* sensor, int32_t samplingPeriodUs) const;
+    status_t disableSensor(Sensor const* sensor) const;
+    status_t setEventRate(Sensor const* sensor, nsecs_t ns) const;
+
+    // these are here only to support SensorManager.java
+    status_t enableSensor(int32_t handle, int32_t samplingPeriodUs, int maxBatchReportLatencyUs,
+                          int reservedFlags) const;
+    status_t disableSensor(int32_t handle) const;
+    status_t flush() const;
+    // Send an ack for every wake_up sensor event that is set to WAKE_UP_SENSOR_EVENT_NEEDS_ACK.
+    void sendAck(const ASensorEvent* events, int count);
+
+    status_t injectSensorEvent(const ASensorEvent& event);
+private:
+    sp<Looper> getLooper() const;
+    sp<ISensorEventConnection> mSensorEventConnection;
+    sp<BitTube> mSensorChannel;
+    mutable Mutex mLock;
+    mutable sp<Looper> mLooper;
+    ASensorEvent* mRecBuffer;
+    size_t mAvailable;
+    size_t mConsumed;
+    uint32_t mNumAcksToSend;
+};
+
+// ----------------------------------------------------------------------------
+}; // namespace android
diff --git a/libs/sensor/include/sensor/SensorManager.h b/libs/sensor/include/sensor/SensorManager.h
new file mode 100644
index 0000000..a3d9741
--- /dev/null
+++ b/libs/sensor/include/sensor/SensorManager.h
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_GUI_SENSOR_MANAGER_H
+#define ANDROID_GUI_SENSOR_MANAGER_H
+
+#include <map>
+#include <unordered_map>
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <binder/IBinder.h>
+#include <binder/IPCThreadState.h>
+#include <binder/IServiceManager.h>
+
+#include <utils/Errors.h>
+#include <utils/StrongPointer.h>
+#include <utils/Vector.h>
+#include <utils/String8.h>
+
+#include <sensor/SensorEventQueue.h>
+
+// ----------------------------------------------------------------------------
+// Concrete types for the NDK
+struct ASensorManager { };
+
+struct native_handle;
+typedef struct native_handle native_handle_t;
+
+// ----------------------------------------------------------------------------
+namespace android {
+// ----------------------------------------------------------------------------
+
+class ISensorServer;
+class Sensor;
+class SensorEventQueue;
+// ----------------------------------------------------------------------------
+
+class SensorManager : public ASensorManager
+{
+public:
+    static SensorManager& getInstanceForPackage(const String16& packageName);
+    ~SensorManager();
+
+    ssize_t getSensorList(Sensor const* const** list);
+    ssize_t getDynamicSensorList(Vector<Sensor>& list);
+    Sensor const* getDefaultSensor(int type);
+    sp<SensorEventQueue> createEventQueue(String8 packageName = String8(""), int mode = 0);
+    bool isDataInjectionEnabled();
+    int createDirectChannel(size_t size, int channelType, const native_handle_t *channelData);
+    void destroyDirectChannel(int channelNativeHandle);
+    int configureDirectChannel(int channelNativeHandle, int sensorHandle, int rateLevel);
+
+private:
+    // DeathRecipient interface
+    void sensorManagerDied();
+
+    SensorManager(const String16& opPackageName);
+    status_t assertStateLocked();
+
+private:
+    static Mutex sLock;
+    static std::map<String16, SensorManager*> sPackageInstances;
+
+    Mutex mLock;
+    sp<ISensorServer> mSensorServer;
+    Sensor const** mSensorList;
+    Vector<Sensor> mSensors;
+    sp<IBinder::DeathRecipient> mDeathObserver;
+    const String16 mOpPackageName;
+    std::unordered_map<int, sp<ISensorEventConnection>> mDirectConnection;
+    int32_t mDirectConnectionHandle;
+};
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+
+#endif // ANDROID_GUI_SENSOR_MANAGER_H
diff --git a/libs/sensor/tests/Android.bp b/libs/sensor/tests/Android.bp
new file mode 100644
index 0000000..9d530fc
--- /dev/null
+++ b/libs/sensor/tests/Android.bp
@@ -0,0 +1,29 @@
+// Copyright 2017 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+cc_test {
+    name: "libsensor_test",
+
+    clang: true,
+
+    srcs: [
+        "Sensor_test.cpp",
+    ],
+
+    shared_libs: [
+        "liblog",
+        "libsensor",
+        "libutils",
+    ],
+}
diff --git a/libs/gui/tests/Sensor_test.cpp b/libs/sensor/tests/Sensor_test.cpp
similarity index 98%
rename from libs/gui/tests/Sensor_test.cpp
rename to libs/sensor/tests/Sensor_test.cpp
index fbf282d..ede20c9 100644
--- a/libs/gui/tests/Sensor_test.cpp
+++ b/libs/sensor/tests/Sensor_test.cpp
@@ -16,7 +16,7 @@
 
 #define LOG_TAG "Sensor_test"
 
-#include <gui/Sensor.h>
+#include <sensor/Sensor.h>
 #include <hardware/sensors.h>
 #include <utils/Errors.h>