diff --git a/gnss/1.0/default/GnssNi.cpp b/gnss/1.0/default/GnssNi.cpp
new file mode 100644
index 0000000..10af1f4
--- /dev/null
+++ b/gnss/1.0/default/GnssNi.cpp
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+#define LOG_TAG "GnssHAL_GnssNiInterface"
+
+#include "GnssNi.h"
+
+namespace android {
+namespace hardware {
+namespace gnss {
+namespace V1_0 {
+namespace implementation {
+
+std::vector<std::unique_ptr<ThreadFuncArgs>> GnssNi::sThreadFuncArgsList;
+sp<IGnssNiCallback> GnssNi::sGnssNiCbIface = nullptr;
+bool GnssNi::sInterfaceExists = false;
+
+GpsNiCallbacks GnssNi::sGnssNiCb = {
+    .notify_cb = niNotifyCb,
+    .create_thread_cb = createThreadCb
+};
+
+GnssNi::GnssNi(const GpsNiInterface* gpsNiIface) : mGnssNiIface(gpsNiIface) {
+    /* Error out if an instance of the interface already exists. */
+    LOG_ALWAYS_FATAL_IF(sInterfaceExists);
+    sInterfaceExists = true;
+}
+
+GnssNi::~GnssNi() {
+    sThreadFuncArgsList.clear();
+}
+
+pthread_t GnssNi::createThreadCb(const char* name, void (*start)(void*), void* arg) {
+    return createPthread(name, start, arg, &sThreadFuncArgsList);
+}
+
+void GnssNi::niNotifyCb(GpsNiNotification* notification) {
+    if (sGnssNiCbIface == nullptr) {
+        ALOGE("%s: GNSS NI Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    if (notification == nullptr) {
+        ALOGE("%s: Invalid GpsNotification callback from GNSS HAL", __func__);
+        return;
+    }
+
+    IGnssNiCallback::GnssNiNotification notificationGnss = {
+        .notificationId =  notification->notification_id,
+        .niType = static_cast<IGnssNiCallback::GnssNiType>(notification->ni_type),
+        .notifyFlags =
+                static_cast<IGnssNiCallback::GnssNiNotifyFlags>(notification->notify_flags),
+        .timeoutSec = static_cast<uint32_t>(notification->timeout),
+        .defaultResponse =
+                static_cast<IGnssNiCallback::GnssUserResponseType>(notification->default_response),
+        .requestorId = notification->requestor_id,
+        .notificationMessage = notification->text,
+        .requestorIdEncoding =
+                static_cast<IGnssNiCallback::GnssNiEncodingType>(notification->requestor_id_encoding),
+        .notificationIdEncoding =
+                static_cast<IGnssNiCallback::GnssNiEncodingType>(notification->text_encoding)
+    };
+
+    sGnssNiCbIface->niNotifyCb(notificationGnss);
+}
+
+// Methods from ::android::hardware::gnss::V1_0::IGnssNi follow.
+Return<void> GnssNi::setCallback(const sp<IGnssNiCallback>& callback)  {
+    if (mGnssNiIface == nullptr) {
+       ALOGE("%s: GnssNi interface is unavailable", __func__);
+       return Void();
+    }
+
+    sGnssNiCbIface = callback;
+
+    mGnssNiIface->init(&sGnssNiCb);
+    return Void();
+}
+
+Return<void> GnssNi::respond(int32_t notifId, IGnssNiCallback::GnssUserResponseType userResponse)  {
+    if (mGnssNiIface == nullptr) {
+        ALOGE("%s: GnssNi interface is unavailable", __func__);
+    } else {
+        mGnssNiIface->respond(notifId, static_cast<GpsUserResponseType>(userResponse));
+    }
+    return Void();
+}
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace gnss
+}  // namespace hardware
+}  // namespace android