diff --git a/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
index 3ff9d98..d1baf63 100644
--- a/media/libmediaplayerservice/MediaPlayerService.cpp
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -577,7 +577,7 @@
     mLoop = false;
     mStatus = NO_INIT;
     mAudioSessionId = audioSessionId;
-    mUID = uid;
+    mUid = uid;
     mRetransmitEndpointValid = false;
     mAudioAttributes = NULL;
 
@@ -643,7 +643,7 @@
     }
 
     if (p != NULL) {
-        p->setUID(mUID);
+        p->setUID(mUid);
     }
 
     return p;
@@ -1386,7 +1386,7 @@
 
 #undef LOG_TAG
 #define LOG_TAG "AudioSink"
-MediaPlayerService::AudioOutput::AudioOutput(audio_session_t sessionId, int uid, int pid,
+MediaPlayerService::AudioOutput::AudioOutput(audio_session_t sessionId, uid_t uid, int pid,
         const audio_attributes_t* attr)
     : mCallback(NULL),
       mCallbackCookie(NULL),
@@ -2348,7 +2348,7 @@
         return;
     }
 
-    int uid = IPCThreadState::self()->getCallingUid();
+    uid_t uid = IPCThreadState::self()->getCallingUid();
     if (uid == AID_MEDIA) {
         return;
     }
diff --git a/media/libmediaplayerservice/MediaPlayerService.h b/media/libmediaplayerservice/MediaPlayerService.h
index ef82b48..ecd0252 100644
--- a/media/libmediaplayerservice/MediaPlayerService.h
+++ b/media/libmediaplayerservice/MediaPlayerService.h
@@ -75,7 +75,7 @@
         class CallbackData;
 
      public:
-                                AudioOutput(audio_session_t sessionId, int uid, int pid,
+                                AudioOutput(audio_session_t sessionId, uid_t uid, int pid,
                                         const audio_attributes_t * attr);
         virtual                 ~AudioOutput();
 
@@ -152,7 +152,7 @@
         float                   mMsecsPerFrame;
         size_t                  mFrameSize;
         audio_session_t         mSessionId;
-        int                     mUid;
+        uid_t                   mUid;
         int                     mPid;
         float                   mSendLevel;
         int                     mAuxEffectId;
@@ -402,7 +402,7 @@
                     int32_t                     mConnId;
                     audio_session_t             mAudioSessionId;
                     audio_attributes_t *        mAudioAttributes;
-                    uid_t                       mUID;
+                    uid_t                       mUid;
                     sp<ANativeWindow>           mConnectedWindow;
                     sp<IBinder>                 mConnectedWindowBinder;
                     struct sockaddr_in          mRetransmitEndpoint;
diff --git a/media/utils/BatteryNotifier.cpp b/media/utils/BatteryNotifier.cpp
index 7a7321f..09bc042 100644
--- a/media/utils/BatteryNotifier.cpp
+++ b/media/utils/BatteryNotifier.cpp
@@ -38,7 +38,7 @@
     }
 }
 
-void BatteryNotifier::noteStartVideo(int uid) {
+void BatteryNotifier::noteStartVideo(uid_t uid) {
     Mutex::Autolock _l(mLock);
     sp<IBatteryStats> batteryService = getBatteryService_l();
     if (mVideoRefCounts[uid] == 0 && batteryService != nullptr) {
@@ -47,7 +47,7 @@
     mVideoRefCounts[uid]++;
 }
 
-void BatteryNotifier::noteStopVideo(int uid) {
+void BatteryNotifier::noteStopVideo(uid_t uid) {
     Mutex::Autolock _l(mLock);
     if (mVideoRefCounts.find(uid) == mVideoRefCounts.end()) {
         ALOGW("%s: video refcount is broken for uid(%d).", __FUNCTION__, (int)uid);
@@ -74,7 +74,7 @@
     }
 }
 
-void BatteryNotifier::noteStartAudio(int uid) {
+void BatteryNotifier::noteStartAudio(uid_t uid) {
     Mutex::Autolock _l(mLock);
     sp<IBatteryStats> batteryService = getBatteryService_l();
     if (mAudioRefCounts[uid] == 0 && batteryService != nullptr) {
@@ -83,7 +83,7 @@
     mAudioRefCounts[uid]++;
 }
 
-void BatteryNotifier::noteStopAudio(int uid) {
+void BatteryNotifier::noteStopAudio(uid_t uid) {
     Mutex::Autolock _l(mLock);
     if (mAudioRefCounts.find(uid) == mAudioRefCounts.end()) {
         ALOGW("%s: audio refcount is broken for uid(%d).", __FUNCTION__, (int)uid);
@@ -110,11 +110,11 @@
     }
 }
 
-void BatteryNotifier::noteFlashlightOn(const String8& id, int uid) {
+void BatteryNotifier::noteFlashlightOn(const String8& id, uid_t uid) {
     Mutex::Autolock _l(mLock);
     sp<IBatteryStats> batteryService = getBatteryService_l();
 
-    std::pair<String8, int> k = std::make_pair(id, uid);
+    std::pair<String8, uid_t> k = std::make_pair(id, uid);
     if (!mFlashlightState[k]) {
         mFlashlightState[k] = true;
         if (batteryService != nullptr) {
@@ -123,11 +123,11 @@
     }
 }
 
-void BatteryNotifier::noteFlashlightOff(const String8& id, int uid) {
+void BatteryNotifier::noteFlashlightOff(const String8& id, uid_t uid) {
     Mutex::Autolock _l(mLock);
     sp<IBatteryStats> batteryService = getBatteryService_l();
 
-    std::pair<String8, int> k = std::make_pair(id, uid);
+    std::pair<String8, uid_t> k = std::make_pair(id, uid);
     if (mFlashlightState[k]) {
         mFlashlightState[k] = false;
         if (batteryService != nullptr) {
@@ -145,10 +145,10 @@
     }
 }
 
-void BatteryNotifier::noteStartCamera(const String8& id, int uid) {
+void BatteryNotifier::noteStartCamera(const String8& id, uid_t uid) {
     Mutex::Autolock _l(mLock);
     sp<IBatteryStats> batteryService = getBatteryService_l();
-    std::pair<String8, int> k = std::make_pair(id, uid);
+    std::pair<String8, uid_t> k = std::make_pair(id, uid);
     if (!mCameraState[k]) {
         mCameraState[k] = true;
         if (batteryService != nullptr) {
@@ -157,10 +157,10 @@
     }
 }
 
-void BatteryNotifier::noteStopCamera(const String8& id, int uid) {
+void BatteryNotifier::noteStopCamera(const String8& id, uid_t uid) {
     Mutex::Autolock _l(mLock);
     sp<IBatteryStats> batteryService = getBatteryService_l();
-    std::pair<String8, int> k = std::make_pair(id, uid);
+    std::pair<String8, uid_t> k = std::make_pair(id, uid);
     if (mCameraState[k]) {
         mCameraState[k] = false;
         if (batteryService != nullptr) {
@@ -211,7 +211,7 @@
         // Notify start now if mediaserver or audioserver is already started.
         // 1) mediaserver and audioserver is started before batterystats service
         // 2) batterystats server may have crashed.
-        std::map<int, int>::iterator it = mVideoRefCounts.begin();
+        std::map<uid_t, int>::iterator it = mVideoRefCounts.begin();
         for (; it != mVideoRefCounts.end(); ++it) {
             mBatteryStatService->noteStartVideo(it->first);
         }
diff --git a/media/utils/include/mediautils/BatteryNotifier.h b/media/utils/include/mediautils/BatteryNotifier.h
index 2ba4c76..a4e42ad 100644
--- a/media/utils/include/mediautils/BatteryNotifier.h
+++ b/media/utils/include/mediautils/BatteryNotifier.h
@@ -37,17 +37,17 @@
 public:
     ~BatteryNotifier();
 
-    void noteStartVideo(int uid);
-    void noteStopVideo(int uid);
+    void noteStartVideo(uid_t uid);
+    void noteStopVideo(uid_t uid);
     void noteResetVideo();
-    void noteStartAudio(int uid);
-    void noteStopAudio(int uid);
+    void noteStartAudio(uid_t uid);
+    void noteStopAudio(uid_t uid);
     void noteResetAudio();
-    void noteFlashlightOn(const String8& id, int uid);
-    void noteFlashlightOff(const String8& id, int uid);
+    void noteFlashlightOn(const String8& id, uid_t uid);
+    void noteFlashlightOff(const String8& id, uid_t uid);
     void noteResetFlashlight();
-    void noteStartCamera(const String8& id, int uid);
-    void noteStopCamera(const String8& id, int uid);
+    void noteStartCamera(const String8& id, uid_t uid);
+    void noteStopCamera(const String8& id, uid_t uid);
     void noteResetCamera();
 
 private:
@@ -58,10 +58,10 @@
     };
 
     Mutex mLock;
-    std::map<int, int> mVideoRefCounts;
-    std::map<int, int> mAudioRefCounts;
-    std::map<std::pair<String8, int>, bool> mFlashlightState;
-    std::map<std::pair<String8, int>, bool> mCameraState;
+    std::map<uid_t, int> mVideoRefCounts;
+    std::map<uid_t, int> mAudioRefCounts;
+    std::map<std::pair<String8, uid_t>, bool> mFlashlightState;
+    std::map<std::pair<String8, uid_t>, bool> mCameraState;
     sp<IBatteryStats> mBatteryStatService;
     sp<DeathNotifier> mDeathNotifier;