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diff --git a/android/1.1/location_api/GnssAPIClient.h b/android/1.1/location_api/GnssAPIClient.h
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+++ b/android/1.1/location_api/GnssAPIClient.h
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+/* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GNSS_API_CLINET_H
+#define GNSS_API_CLINET_H
+
+
+#include <mutex>
+#include <android/hardware/gnss/1.1/IGnss.h>
+#include <android/hardware/gnss/1.1/IGnssCallback.h>
+#include <android/hardware/gnss/1.0/IGnssNiCallback.h>
+#include <LocationAPIClientBase.h>
+
+namespace android {
+namespace hardware {
+namespace gnss {
+namespace V1_1 {
+namespace implementation {
+
+using ::android::sp;
+
+class GnssAPIClient : public LocationAPIClientBase
+{
+public:
+    GnssAPIClient(const sp<V1_0::IGnssCallback>& gpsCb,
+            const sp<V1_0::IGnssNiCallback>& niCb);
+    virtual ~GnssAPIClient();
+    GnssAPIClient(const GnssAPIClient&) = delete;
+    GnssAPIClient& operator=(const GnssAPIClient&) = delete;
+
+    // for GpsInterface
+    void gnssUpdateCallbacks(const sp<V1_0::IGnssCallback>& gpsCb,
+            const sp<V1_0::IGnssNiCallback>& niCb);
+    bool gnssStart();
+    bool gnssStop();
+    bool gnssSetPositionMode(V1_0::IGnss::GnssPositionMode mode,
+            V1_0::IGnss::GnssPositionRecurrence recurrence,
+            uint32_t minIntervalMs,
+            uint32_t preferredAccuracyMeters,
+            uint32_t preferredTimeMs,
+            GnssPowerMode powerMode = GNSS_POWER_MODE_INVALID,
+            uint32_t timeBetweenMeasurement = 0);
+
+    // for GpsNiInterface
+    void gnssNiRespond(int32_t notifId, V1_0::IGnssNiCallback::GnssUserResponseType userResponse);
+
+    // these apis using LocationAPIControlClient
+    void gnssDeleteAidingData(V1_0::IGnss::GnssAidingData aidingDataFlags);
+    void gnssEnable(LocationTechnologyType techType);
+    void gnssDisable();
+    void gnssConfigurationUpdate(const GnssConfig& gnssConfig);
+
+    inline LocationCapabilitiesMask gnssGetCapabilities() const {
+        return mLocationCapabilitiesMask;
+    }
+    void requestCapabilities();
+
+    // callbacks we are interested in
+    void onCapabilitiesCb(LocationCapabilitiesMask capabilitiesMask) final;
+    void onTrackingCb(Location location) final;
+    void onGnssNiCb(uint32_t id, GnssNiNotification gnssNiNotification) final;
+    void onGnssSvCb(GnssSvNotification gnssSvNotification) final;
+    void onGnssNmeaCb(GnssNmeaNotification gnssNmeaNotification) final;
+
+    void onStartTrackingCb(LocationError error) final;
+    void onStopTrackingCb(LocationError error) final;
+
+private:
+    sp<V1_0::IGnssCallback> mGnssCbIface;
+    sp<V1_0::IGnssNiCallback> mGnssNiCbIface;
+    std::mutex mMutex;
+    LocationAPIControlClient* mControlClient;
+    LocationCapabilitiesMask mLocationCapabilitiesMask;
+    bool mLocationCapabilitiesCached;
+    TrackingOptions mTrackingOptions;
+};
+
+}  // namespace implementation
+}  // namespace V1_1
+}  // namespace gnss
+}  // namespace hardware
+}  // namespace android
+#endif // GNSS_API_CLINET_H