diff --git a/libs/binder/ActivityManager.cpp b/libs/binder/ActivityManager.cpp
index 28d0e4f..49a9414 100644
--- a/libs/binder/ActivityManager.cpp
+++ b/libs/binder/ActivityManager.cpp
@@ -89,6 +89,15 @@
     return false;
 }
 
+int32_t ActivityManager::getUidProcessState(const uid_t uid, const String16& callingPackage)
+{
+    sp<IActivityManager> service = getService();
+    if (service != nullptr) {
+        return service->getUidProcessState(uid, callingPackage);
+    }
+    return PROCESS_STATE_UNKNOWN;
+}
+
 status_t ActivityManager::linkToDeath(const sp<IBinder::DeathRecipient>& recipient) {
     sp<IActivityManager> service = getService();
     if (service != nullptr) {
diff --git a/libs/binder/IActivityManager.cpp b/libs/binder/IActivityManager.cpp
index 428db4d..377f604 100644
--- a/libs/binder/IActivityManager.cpp
+++ b/libs/binder/IActivityManager.cpp
@@ -17,8 +17,8 @@
 #include <unistd.h>
 #include <fcntl.h>
 
+#include <binder/ActivityManager.h>
 #include <binder/IActivityManager.h>
-
 #include <binder/Parcel.h>
 
 namespace android {
@@ -90,6 +90,20 @@
          if (reply.readExceptionCode() != 0) return false;
          return reply.readInt32() == 1;
     }
+
+    virtual int32_t getUidProcessState(const uid_t uid, const String16& callingPackage)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(IActivityManager::getInterfaceDescriptor());
+        data.writeInt32(uid);
+        data.writeString16(callingPackage);
+        remote()->transact(GET_UID_PROCESS_STATE_TRANSACTION, data, &reply);
+        // fail on exception
+        if (reply.readExceptionCode() != 0) {
+            return ActivityManager::PROCESS_STATE_UNKNOWN;
+        }
+        return reply.readInt32();
+    }
 };
 
 // ------------------------------------------------------------------------------------
diff --git a/libs/binder/IUidObserver.cpp b/libs/binder/IUidObserver.cpp
index 697e948..82f9047 100644
--- a/libs/binder/IUidObserver.cpp
+++ b/libs/binder/IUidObserver.cpp
@@ -55,6 +55,16 @@
         data.writeInt32(disabled ? 1 : 0);
         remote()->transact(ON_UID_IDLE_TRANSACTION, data, &reply, IBinder::FLAG_ONEWAY);
     }
+
+    virtual void onUidStateChanged(uid_t uid, int32_t procState, int64_t procStateSeq)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(IUidObserver::getInterfaceDescriptor());
+        data.writeInt32((int32_t) uid);
+        data.writeInt32(procState);
+        data.writeInt64(procStateSeq);
+        remote()->transact(ON_UID_STATE_CHANGED_TRANSACTION, data, &reply, IBinder::FLAG_ONEWAY);
+    }
 };
 
 // ----------------------------------------------------------------------
@@ -89,6 +99,14 @@
             onUidIdle(uid, disabled);
             return NO_ERROR;
         } break;
+        case ON_UID_STATE_CHANGED_TRANSACTION: {
+            CHECK_INTERFACE(IUidObserver, data, reply);
+            uid_t uid = data.readInt32();
+            int32_t procState = data.readInt32();
+            int64_t procStateSeq = data.readInt64();
+            onUidStateChanged(uid, procState, procStateSeq);
+            return NO_ERROR;
+        } break;
         default:
             return BBinder::onTransact(code, data, reply, flags);
     }
diff --git a/libs/binder/include/binder/ActivityManager.h b/libs/binder/include/binder/ActivityManager.h
index b8db091..26dafd0 100644
--- a/libs/binder/include/binder/ActivityManager.h
+++ b/libs/binder/include/binder/ActivityManager.h
@@ -31,6 +31,8 @@
 public:
 
     enum {
+        // Flag for registerUidObserver: report uid state changed
+        UID_OBSERVER_PROCSTATE = 1<<0,
         // Flag for registerUidObserver: report uid gone
         UID_OBSERVER_GONE = 1<<1,
         // Flag for registerUidObserver: report uid has become idle
@@ -40,8 +42,27 @@
     };
 
     enum {
-        // Not a real process state
-        PROCESS_STATE_UNKNOWN = -1
+        PROCESS_STATE_UNKNOWN = -1,
+        PROCESS_STATE_PERSISTENT = 0,
+        PROCESS_STATE_PERSISTENT_UI = 1,
+        PROCESS_STATE_TOP = 2,
+        PROCESS_STATE_FOREGROUND_SERVICE = 3,
+        PROCESS_STATE_BOUND_FOREGROUND_SERVICE = 4,
+        PROCESS_STATE_IMPORTANT_FOREGROUND = 5,
+        PROCESS_STATE_IMPORTANT_BACKGROUND = 6,
+        PROCESS_STATE_TRANSIENT_BACKGROUND = 7,
+        PROCESS_STATE_BACKUP = 8,
+        PROCESS_STATE_SERVICE = 9,
+        PROCESS_STATE_RECEIVER = 10,
+        PROCESS_STATE_TOP_SLEEPING = 11,
+        PROCESS_STATE_HEAVY_WEIGHT = 12,
+        PROCESS_STATE_HOME = 13,
+        PROCESS_STATE_LAST_ACTIVITY = 14,
+        PROCESS_STATE_CACHED_ACTIVITY = 15,
+        PROCESS_STATE_CACHED_ACTIVITY_CLIENT = 16,
+        PROCESS_STATE_CACHED_RECENT = 17,
+        PROCESS_STATE_CACHED_EMPTY = 18,
+        PROCESS_STATE_NONEXISTENT = 19,
     };
 
     ActivityManager();
@@ -53,8 +74,10 @@
                              const String16& callingPackage);
     void unregisterUidObserver(const sp<IUidObserver>& observer);
     bool isUidActive(const uid_t uid, const String16& callingPackage);
+    int getUidProcessState(const uid_t uid, const String16& callingPackage);
 
-    status_t linkToDeath(const sp<IBinder::DeathRecipient>& recipient);
+
+  status_t linkToDeath(const sp<IBinder::DeathRecipient>& recipient);
     status_t unlinkToDeath(const sp<IBinder::DeathRecipient>& recipient);
 
 private:
diff --git a/libs/binder/include/binder/IActivityManager.h b/libs/binder/include/binder/IActivityManager.h
index f34969b..6abc071 100644
--- a/libs/binder/include/binder/IActivityManager.h
+++ b/libs/binder/include/binder/IActivityManager.h
@@ -38,12 +38,14 @@
                                      const String16& callingPackage) = 0;
     virtual void unregisterUidObserver(const sp<IUidObserver>& observer) = 0;
     virtual bool isUidActive(const uid_t uid, const String16& callingPackage) = 0;
+    virtual int32_t getUidProcessState(const uid_t uid, const String16& callingPackage) = 0;
 
     enum {
         OPEN_CONTENT_URI_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION,
         REGISTER_UID_OBSERVER_TRANSACTION,
         UNREGISTER_UID_OBSERVER_TRANSACTION,
-        IS_UID_ACTIVE_TRANSACTION
+        IS_UID_ACTIVE_TRANSACTION,
+        GET_UID_PROCESS_STATE_TRANSACTION
     };
 };
 
diff --git a/libs/binder/include/binder/IUidObserver.h b/libs/binder/include/binder/IUidObserver.h
index 9937ad6..a1f530d 100644
--- a/libs/binder/include/binder/IUidObserver.h
+++ b/libs/binder/include/binder/IUidObserver.h
@@ -34,11 +34,13 @@
     virtual void onUidGone(uid_t uid, bool disabled) = 0;
     virtual void onUidActive(uid_t uid) = 0;
     virtual void onUidIdle(uid_t uid, bool disabled) = 0;
+    virtual void onUidStateChanged(uid_t uid, int32_t procState, int64_t procStateSeq) = 0;
 
     enum {
         ON_UID_GONE_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION,
         ON_UID_ACTIVE_TRANSACTION,
-        ON_UID_IDLE_TRANSACTION
+        ON_UID_IDLE_TRANSACTION,
+        ON_UID_STATE_CHANGED_TRANSACTION
     };
 };