diff --git a/services/sensorservice/SensorInterface.cpp b/services/sensorservice/SensorInterface.cpp
index 46f00e8..398cdf9 100644
--- a/services/sensorservice/SensorInterface.cpp
+++ b/services/sensorservice/SensorInterface.cpp
@@ -87,6 +87,42 @@
 
 // ---------------------------------------------------------------------------
 
+RuntimeSensor::RuntimeSensor(const sensor_t& sensor, sp<StateChangeCallback> callback)
+  : BaseSensor(sensor), mCallback(std::move(callback)) {
+}
+
+status_t RuntimeSensor::activate(void*, bool enabled) {
+    if (enabled != mEnabled) {
+        mEnabled = enabled;
+        mCallback->onStateChanged(mEnabled, mSamplingPeriodNs, mBatchReportLatencyNs);
+    }
+    return OK;
+}
+
+status_t RuntimeSensor::batch(void*, int, int, int64_t samplingPeriodNs,
+                              int64_t maxBatchReportLatencyNs) {
+    if (mSamplingPeriodNs != samplingPeriodNs || mBatchReportLatencyNs != maxBatchReportLatencyNs) {
+        mSamplingPeriodNs = samplingPeriodNs;
+        mBatchReportLatencyNs = maxBatchReportLatencyNs;
+        if (mEnabled) {
+            mCallback->onStateChanged(mEnabled, mSamplingPeriodNs, mBatchReportLatencyNs);
+        }
+    }
+    return OK;
+}
+
+status_t RuntimeSensor::setDelay(void*, int, int64_t ns) {
+    if (mSamplingPeriodNs != ns) {
+        mSamplingPeriodNs = ns;
+        if (mEnabled) {
+            mCallback->onStateChanged(mEnabled, mSamplingPeriodNs, mBatchReportLatencyNs);
+        }
+    }
+    return OK;
+}
+
+// ---------------------------------------------------------------------------
+
 ProximitySensor::ProximitySensor(const sensor_t& sensor, SensorService& service)
         : HardwareSensor(sensor), mSensorService(service) {
 }
diff --git a/services/sensorservice/SensorInterface.h b/services/sensorservice/SensorInterface.h
index 5704359..5ee5e12 100644
--- a/services/sensorservice/SensorInterface.h
+++ b/services/sensorservice/SensorInterface.h
@@ -104,6 +104,32 @@
 
 // ---------------------------------------------------------------------------
 
+class RuntimeSensor : public BaseSensor {
+public:
+    static constexpr int DEFAULT_DEVICE_ID = 0;
+
+    class StateChangeCallback : public virtual RefBase {
+      public:
+        virtual void onStateChanged(bool enabled, int64_t samplingPeriodNs,
+                                    int64_t batchReportLatencyNs) = 0;
+    };
+    RuntimeSensor(const sensor_t& sensor, sp<StateChangeCallback> callback);
+    virtual status_t activate(void* ident, bool enabled) override;
+    virtual status_t batch(void* ident, int handle, int flags, int64_t samplingPeriodNs,
+                           int64_t maxBatchReportLatencyNs) override;
+    virtual status_t setDelay(void* ident, int handle, int64_t ns) override;
+    virtual bool process(sensors_event_t*, const sensors_event_t&) { return false; }
+    virtual bool isVirtual() const override { return false; }
+
+private:
+    bool mEnabled = false;
+    int64_t mSamplingPeriodNs = 0;
+    int64_t mBatchReportLatencyNs = 0;
+    sp<StateChangeCallback> mCallback;
+};
+
+// ---------------------------------------------------------------------------
+
 class ProximitySensor : public HardwareSensor {
 public:
     explicit ProximitySensor(const sensor_t& sensor, SensorService& service);
diff --git a/services/sensorservice/SensorList.cpp b/services/sensorservice/SensorList.cpp
index 85ce0f0..6d36b47 100644
--- a/services/sensorservice/SensorList.cpp
+++ b/services/sensorservice/SensorList.cpp
@@ -29,12 +29,12 @@
 const Sensor SensorList::mNonSensor = Sensor("unknown");
 
 bool SensorList::add(
-        int handle, SensorInterface* si, bool isForDebug, bool isVirtual) {
+        int handle, SensorInterface* si, bool isForDebug, bool isVirtual, int deviceId) {
     std::lock_guard<std::mutex> lk(mLock);
     if (handle == si->getSensor().getHandle() &&
         mUsedHandle.insert(handle).second) {
         // will succeed as the mUsedHandle does not have this handle
-        mHandleMap.emplace(handle, Entry(si, isForDebug, isVirtual));
+        mHandleMap.emplace(handle, Entry(si, isForDebug, isVirtual, deviceId));
         return true;
     }
     // handle exist already or handle mismatch
@@ -79,7 +79,8 @@
     Vector<Sensor> sensors;
     forEachEntry(
             [&sensors] (const Entry& e) -> bool {
-                if (!e.isForDebug && !e.si->getSensor().isDynamicSensor()) {
+                if (!e.isForDebug && !e.si->getSensor().isDynamicSensor()
+                    && e.deviceId == RuntimeSensor::DEFAULT_DEVICE_ID) {
                     sensors.add(e.si->getSensor());
                 }
                 return true;
@@ -92,7 +93,8 @@
     Vector<Sensor> sensors;
     forEachEntry(
             [&sensors] (const Entry& e) -> bool {
-                if (!e.si->getSensor().isDynamicSensor()) {
+                if (!e.si->getSensor().isDynamicSensor()
+                    && e.deviceId == RuntimeSensor::DEFAULT_DEVICE_ID) {
                     sensors.add(e.si->getSensor());
                 }
                 return true;
@@ -105,7 +107,8 @@
     Vector<Sensor> sensors;
     forEachEntry(
             [&sensors] (const Entry& e) -> bool {
-                if (!e.isForDebug && e.si->getSensor().isDynamicSensor()) {
+                if (!e.isForDebug && e.si->getSensor().isDynamicSensor()
+                     && e.deviceId == RuntimeSensor::DEFAULT_DEVICE_ID) {
                     sensors.add(e.si->getSensor());
                 }
                 return true;
@@ -118,7 +121,20 @@
     Vector<Sensor> sensors;
     forEachEntry(
             [&sensors] (const Entry& e) -> bool {
-                if (e.isVirtual) {
+                if (e.isVirtual && e.deviceId == RuntimeSensor::DEFAULT_DEVICE_ID) {
+                    sensors.add(e.si->getSensor());
+                }
+                return true;
+            });
+    return sensors;
+}
+
+const Vector<Sensor> SensorList::getRuntimeSensors(int deviceId) const {
+    // lock in forEachEntry
+    Vector<Sensor> sensors;
+    forEachEntry(
+            [&sensors, deviceId] (const Entry& e) -> bool {
+                if (!e.isForDebug && e.deviceId == deviceId) {
                     sensors.add(e.si->getSensor());
                 }
                 return true;
diff --git a/services/sensorservice/SensorList.h b/services/sensorservice/SensorList.h
index 049ae7c..79f6701 100644
--- a/services/sensorservice/SensorList.h
+++ b/services/sensorservice/SensorList.h
@@ -40,14 +40,16 @@
         sp<SensorInterface> si;
         const bool isForDebug;
         const bool isVirtual;
-        Entry(SensorInterface* si_, bool debug_, bool virtual_) :
-            si(si_), isForDebug(debug_), isVirtual(virtual_) {
+        const int deviceId;
+        Entry(SensorInterface* si_, bool debug_, bool virtual_, int deviceId_) :
+            si(si_), isForDebug(debug_), isVirtual(virtual_), deviceId(deviceId_) {
         }
     };
 
     // After SensorInterface * is added into SensorList, it can be assumed that SensorList own the
     // object it pointed to and the object should not be released elsewhere.
-    bool add(int handle, SensorInterface* si, bool isForDebug = false, bool isVirtual = false);
+    bool add(int handle, SensorInterface* si, bool isForDebug = false, bool isVirtual = false,
+             int deviceId = RuntimeSensor::DEFAULT_DEVICE_ID);
 
     // After a handle is removed, the object that SensorInterface * pointing to may get deleted if
     // no more sp<> of the same object exist.
@@ -60,6 +62,7 @@
     const Vector<Sensor> getUserDebugSensors() const;
     const Vector<Sensor> getDynamicSensors() const;
     const Vector<Sensor> getVirtualSensors() const;
+    const Vector<Sensor> getRuntimeSensors(int deviceId) const;
 
     String8 getName(int handle) const;
     String8 getStringType(int handle) const;
diff --git a/services/sensorservice/SensorService.cpp b/services/sensorservice/SensorService.cpp
index 21d6b6b..0c9fef5 100644
--- a/services/sensorservice/SensorService.cpp
+++ b/services/sensorservice/SensorService.cpp
@@ -102,6 +102,33 @@
 static const String16 sLocationHardwarePermission("android.permission.LOCATION_HARDWARE");
 static const String16 sManageSensorsPermission("android.permission.MANAGE_SENSORS");
 
+namespace {
+
+// TODO(b/259227294): Move the sensor ranges to the HAL.
+int32_t nextRuntimeSensorHandle() {
+    static constexpr int32_t kRuntimeHandleBase = 0x5F000000;
+    static constexpr int32_t kRuntimeHandleEnd = 0x5FFFFFFF;
+    static int32_t nextHandle = kRuntimeHandleBase;
+    if (nextHandle == kRuntimeHandleEnd) {
+        return -1;
+    }
+    return nextHandle++;
+}
+
+class RuntimeSensorCallbackProxy : public RuntimeSensor::StateChangeCallback {
+ public:
+    RuntimeSensorCallbackProxy(sp<SensorService::RuntimeSensorStateChangeCallback> callback)
+        : mCallback(std::move(callback)) {}
+    void onStateChanged(bool enabled, int64_t samplingPeriodNs,
+                        int64_t batchReportLatencyNs) override {
+        mCallback->onStateChanged(enabled, samplingPeriodNs, batchReportLatencyNs);
+    }
+ private:
+    sp<SensorService::RuntimeSensorStateChangeCallback> mCallback;
+};
+
+} // namespace
+
 static bool isAutomotive() {
     sp<IServiceManager> serviceManager = defaultServiceManager();
     if (serviceManager.get() == nullptr) {
@@ -137,6 +164,60 @@
     mMicSensorPrivacyPolicy = new MicrophonePrivacyPolicy(this);
 }
 
+int SensorService::registerRuntimeSensor(
+    const sensor_t& sensor, int deviceId, sp<RuntimeSensorStateChangeCallback> callback) {
+    int handle = 0;
+    while (handle == 0 || !mSensors.isNewHandle(handle)) {
+        handle = nextRuntimeSensorHandle();
+        if (handle < 0) {
+            // Ran out of the dedicated range for runtime sensors.
+            return handle;
+        }
+    }
+
+    ALOGI("Registering runtime sensor handle 0x%x, type %d, name %s",
+            handle, sensor.type, sensor.name);
+
+    sp<RuntimeSensor::StateChangeCallback> runtimeSensorCallback(
+        new RuntimeSensorCallbackProxy(std::move(callback)));
+    sensor_t runtimeSensor = sensor;
+    // force the handle to be consistent
+    runtimeSensor.handle = handle;
+    SensorInterface *si = new RuntimeSensor(runtimeSensor, std::move(runtimeSensorCallback));
+
+    Mutex::Autolock _l(mLock);
+    const Sensor& s = registerSensor(si, /* isDebug= */ false, /* isVirtual= */ false, deviceId);
+
+    if (s.getHandle() != handle) {
+        // The registration was unsuccessful.
+        return s.getHandle();
+    }
+    return handle;
+}
+
+status_t SensorService::unregisterRuntimeSensor(int handle) {
+    ALOGI("Unregistering runtime sensor handle 0x%x disconnected", handle);
+    {
+        Mutex::Autolock _l(mLock);
+        if (!unregisterDynamicSensorLocked(handle)) {
+            ALOGE("Runtime sensor release error.");
+            return UNKNOWN_ERROR;
+        }
+    }
+
+    ConnectionSafeAutolock connLock = mConnectionHolder.lock(mLock);
+    for (const sp<SensorEventConnection>& connection : connLock.getActiveConnections()) {
+        connection->removeSensor(handle);
+    }
+    return OK;
+}
+
+status_t SensorService::sendRuntimeSensorEvent(const sensors_event_t& event) {
+    Mutex::Autolock _l(mLock);
+    mRuntimeSensorEventQueue.push(event);
+    return OK;
+}
+
 bool SensorService::initializeHmacKey() {
     int fd = open(SENSOR_SERVICE_HMAC_KEY_FILE, O_RDONLY|O_CLOEXEC);
     if (fd != -1) {
@@ -407,10 +488,11 @@
         && isUidActive(uid) && !isOperationRestrictedLocked(opPackageName);
 }
 
-const Sensor& SensorService::registerSensor(SensorInterface* s, bool isDebug, bool isVirtual) {
+const Sensor& SensorService::registerSensor(SensorInterface* s, bool isDebug, bool isVirtual,
+                                            int deviceId) {
     int handle = s->getSensor().getHandle();
     int type = s->getSensor().getType();
-    if (mSensors.add(handle, s, isDebug, isVirtual)){
+    if (mSensors.add(handle, s, isDebug, isVirtual, deviceId)) {
         mRecentEvent.emplace(handle, new SensorServiceUtil::RecentEventLogger(type));
         return s->getSensor();
     } else {
@@ -1003,6 +1085,7 @@
         recordLastValueLocked(mSensorEventBuffer, count);
 
         // handle virtual sensors
+        bool bufferNeedsSorting = false;
         if (count && vcount) {
             sensors_event_t const * const event = mSensorEventBuffer;
             if (!mActiveVirtualSensors.empty()) {
@@ -1038,12 +1121,37 @@
                     // record the last synthesized values
                     recordLastValueLocked(&mSensorEventBuffer[count], k);
                     count += k;
-                    // sort the buffer by time-stamps
-                    sortEventBuffer(mSensorEventBuffer, count);
+                    bufferNeedsSorting = true;
                 }
             }
         }
 
+        // handle runtime sensors
+        {
+            size_t k = 0;
+            while (!mRuntimeSensorEventQueue.empty()) {
+                if (count + k >= minBufferSize) {
+                    ALOGE("buffer too small to hold all events: count=%zd, k=%zu, size=%zu",
+                          count, k, minBufferSize);
+                    break;
+                }
+                mSensorEventBuffer[count + k] = mRuntimeSensorEventQueue.front();
+                mRuntimeSensorEventQueue.pop();
+                k++;
+            }
+            if (k) {
+                // record the last synthesized values
+                recordLastValueLocked(&mSensorEventBuffer[count], k);
+                count += k;
+                bufferNeedsSorting = true;
+            }
+        }
+
+        if (bufferNeedsSorting) {
+            // sort the buffer by time-stamps
+            sortEventBuffer(mSensorEventBuffer, count);
+        }
+
         // handle backward compatibility for RotationVector sensor
         if (halVersion < SENSORS_DEVICE_API_VERSION_1_0) {
             for (int i = 0; i < count; i++) {
@@ -1342,19 +1450,37 @@
     return accessibleSensorList;
 }
 
+void SensorService::addSensorIfAccessible(const String16& opPackageName, const Sensor& sensor,
+        Vector<Sensor>& accessibleSensorList) {
+    if (canAccessSensor(sensor, "can't see", opPackageName)) {
+        accessibleSensorList.add(sensor);
+    } else if (sensor.getType() != SENSOR_TYPE_HEAD_TRACKER) {
+        ALOGI("Skipped sensor %s because it requires permission %s and app op %" PRId32,
+        sensor.getName().string(), sensor.getRequiredPermission().string(),
+        sensor.getRequiredAppOp());
+    }
+}
+
 Vector<Sensor> SensorService::getDynamicSensorList(const String16& opPackageName) {
     Vector<Sensor> accessibleSensorList;
     mSensors.forEachSensor(
             [this, &opPackageName, &accessibleSensorList] (const Sensor& sensor) -> bool {
                 if (sensor.isDynamicSensor()) {
-                    if (canAccessSensor(sensor, "can't see", opPackageName)) {
-                        accessibleSensorList.add(sensor);
-                    } else if (sensor.getType() != SENSOR_TYPE_HEAD_TRACKER) {
-                        ALOGI("Skipped sensor %s because it requires permission %s and app op %" PRId32,
-                              sensor.getName().string(),
-                              sensor.getRequiredPermission().string(),
-                              sensor.getRequiredAppOp());
-                    }
+                    addSensorIfAccessible(opPackageName, sensor, accessibleSensorList);
+                }
+                return true;
+            });
+    makeUuidsIntoIdsForSensorList(accessibleSensorList);
+    return accessibleSensorList;
+}
+
+Vector<Sensor> SensorService::getRuntimeSensorList(const String16& opPackageName, int deviceId) {
+    Vector<Sensor> accessibleSensorList;
+    mSensors.forEachEntry(
+            [this, &opPackageName, deviceId, &accessibleSensorList] (
+                    const SensorServiceUtil::SensorList::Entry& e) -> bool {
+                if (e.deviceId == deviceId) {
+                    addSensorIfAccessible(opPackageName, e.si->getSensor(), accessibleSensorList);
                 }
                 return true;
             });
diff --git a/services/sensorservice/SensorService.h b/services/sensorservice/SensorService.h
index 4ba3c51..e490398 100644
--- a/services/sensorservice/SensorService.h
+++ b/services/sensorservice/SensorService.h
@@ -42,6 +42,7 @@
 
 #include <stdint.h>
 #include <sys/types.h>
+#include <queue>
 #include <unordered_map>
 #include <unordered_set>
 #include <vector>
@@ -143,6 +144,14 @@
         virtual void onProximityActive(bool isActive) = 0;
     };
 
+    class RuntimeSensorStateChangeCallback : public virtual RefBase {
+    public:
+        // Note that the callback is invoked from an async thread and can interact with the
+        // SensorService directly.
+        virtual void onStateChanged(bool enabled, int64_t samplingPeriodNanos,
+                                    int64_t batchReportLatencyNanos) = 0;
+    };
+
     static char const* getServiceName() ANDROID_API { return "sensorservice"; }
     SensorService() ANDROID_API;
 
@@ -169,6 +178,11 @@
     status_t addProximityActiveListener(const sp<ProximityActiveListener>& callback) ANDROID_API;
     status_t removeProximityActiveListener(const sp<ProximityActiveListener>& callback) ANDROID_API;
 
+    int registerRuntimeSensor(const sensor_t& sensor, int deviceId,
+                              sp<RuntimeSensorStateChangeCallback> callback) ANDROID_API;
+    status_t unregisterRuntimeSensor(int handle) ANDROID_API;
+    status_t sendRuntimeSensorEvent(const sensors_event_t& event) ANDROID_API;
+
     // Returns true if a sensor should be throttled according to our rate-throttling rules.
     static bool isSensorInCappedSet(int sensorType);
 
@@ -346,6 +360,7 @@
     // ISensorServer interface
     virtual Vector<Sensor> getSensorList(const String16& opPackageName);
     virtual Vector<Sensor> getDynamicSensorList(const String16& opPackageName);
+    virtual Vector<Sensor> getRuntimeSensorList(const String16& opPackageName, int deviceId);
     virtual sp<ISensorEventConnection> createSensorEventConnection(
             const String8& packageName,
             int requestedMode, const String16& opPackageName, const String16& attributionTag);
@@ -364,8 +379,9 @@
     bool isWakeUpSensor(int type) const;
     void recordLastValueLocked(sensors_event_t const* buffer, size_t count);
     static void sortEventBuffer(sensors_event_t* buffer, size_t count);
-    const Sensor& registerSensor(SensorInterface* sensor,
-                                 bool isDebug = false, bool isVirtual = false);
+    const Sensor& registerSensor(SensorInterface* sensor, bool isDebug = false,
+                                 bool isVirtual = false,
+                                 int deviceId = RuntimeSensor::DEFAULT_DEVICE_ID);
     const Sensor& registerVirtualSensor(SensorInterface* sensor, bool isDebug = false);
     const Sensor& registerDynamicSensorLocked(SensorInterface* sensor, bool isDebug = false);
     bool unregisterDynamicSensorLocked(int handle);
@@ -375,6 +391,8 @@
             sensors_event_t const* buffer, const int count);
     bool canAccessSensor(const Sensor& sensor, const char* operation,
             const String16& opPackageName);
+    void addSensorIfAccessible(const String16& opPackageName, const Sensor& sensor,
+            Vector<Sensor>& accessibleSensorList);
     static bool hasPermissionForSensor(const Sensor& sensor);
     static int getTargetSdkVersion(const String16& opPackageName);
     static void resetTargetSdkVersionCache(const String16& opPackageName);
@@ -492,6 +510,7 @@
     wp<const SensorEventConnection> * mMapFlushEventsToConnections;
     std::unordered_map<int, SensorServiceUtil::RecentEventLogger*> mRecentEvent;
     Mode mCurrentOperatingMode;
+    std::queue<sensors_event_t> mRuntimeSensorEventQueue;
 
     // true if the head tracker sensor type is currently restricted to system usage only
     // (can only be unrestricted for testing, via shell cmd)