diff --git a/include/android/input.h b/include/android/input.h
index a660761..c7635b8 100644
--- a/include/android/input.h
+++ b/include/android/input.h
@@ -305,6 +305,12 @@
     /* The pointer is not down but has exited the boundaries of a window or view.
      */
     AMOTION_EVENT_ACTION_HOVER_EXIT = 10,
+
+    /* One or more buttons have been pressed. */
+    AMOTION_EVENT_ACTION_BUTTON_PRESS = 11,
+
+    /* One or more buttons have been released. */
+    AMOTION_EVENT_ACTION_BUTTON_RELEASE = 12,
 };
 
 /*
@@ -405,6 +411,8 @@
     AMOTION_EVENT_BUTTON_TERTIARY = 1 << 2,
     AMOTION_EVENT_BUTTON_BACK = 1 << 3,
     AMOTION_EVENT_BUTTON_FORWARD = 1 << 4,
+    AMOTION_EVENT_BUTTON_STYLUS_PRIMARY = 1 << 5,
+    AMOTION_EVENT_BUTTON_STYLUS_SECONDARY = 1 << 6,
 };
 
 /*
diff --git a/include/input/Input.h b/include/input/Input.h
index c360f63..1da8356 100644
--- a/include/input/Input.h
+++ b/include/input/Input.h
@@ -379,6 +379,10 @@
 
     inline int32_t getButtonState() const { return mButtonState; }
 
+    inline int32_t setButtonState(int32_t buttonState) { mButtonState = buttonState; }
+
+    inline int32_t getActionButton() const { return mActionButton; }
+
     inline float getXOffset() const { return mXOffset; }
 
     inline float getYOffset() const { return mYOffset; }
@@ -532,6 +536,7 @@
             int32_t deviceId,
             int32_t source,
             int32_t action,
+            int32_t actionButton,
             int32_t flags,
             int32_t edgeFlags,
             int32_t metaState,
@@ -584,6 +589,7 @@
 
 protected:
     int32_t mAction;
+    int32_t mActionButton;
     int32_t mFlags;
     int32_t mEdgeFlags;
     int32_t mMetaState;
diff --git a/include/input/InputTransport.h b/include/input/InputTransport.h
index e7e383b..6dc77b7 100644
--- a/include/input/InputTransport.h
+++ b/include/input/InputTransport.h
@@ -84,6 +84,7 @@
             int32_t deviceId;
             int32_t source;
             int32_t action;
+            int32_t actionButton;
             int32_t flags;
             int32_t metaState;
             int32_t buttonState;
@@ -232,6 +233,7 @@
             int32_t deviceId,
             int32_t source,
             int32_t action,
+            int32_t actionButton,
             int32_t flags,
             int32_t edgeFlags,
             int32_t metaState,
diff --git a/libs/input/Input.cpp b/libs/input/Input.cpp
index 3a7afe9..2c1418e 100644
--- a/libs/input/Input.cpp
+++ b/libs/input/Input.cpp
@@ -216,6 +216,7 @@
         int32_t deviceId,
         int32_t source,
         int32_t action,
+        int32_t actionButton,
         int32_t flags,
         int32_t edgeFlags,
         int32_t metaState,
@@ -231,6 +232,7 @@
         const PointerCoords* pointerCoords) {
     InputEvent::initialize(deviceId, source);
     mAction = action;
+    mActionButton = actionButton;
     mFlags = flags;
     mEdgeFlags = edgeFlags;
     mMetaState = metaState;
@@ -250,6 +252,7 @@
 void MotionEvent::copyFrom(const MotionEvent* other, bool keepHistory) {
     InputEvent::initialize(other->mDeviceId, other->mSource);
     mAction = other->mAction;
+    mActionButton = other->mActionButton;
     mFlags = other->mFlags;
     mEdgeFlags = other->mEdgeFlags;
     mMetaState = other->mMetaState;
@@ -428,6 +431,7 @@
     mDeviceId = parcel->readInt32();
     mSource = parcel->readInt32();
     mAction = parcel->readInt32();
+    mActionButton = parcel->readInt32();
     mFlags = parcel->readInt32();
     mEdgeFlags = parcel->readInt32();
     mMetaState = parcel->readInt32();
@@ -475,6 +479,7 @@
     parcel->writeInt32(mDeviceId);
     parcel->writeInt32(mSource);
     parcel->writeInt32(mAction);
+    parcel->writeInt32(mActionButton);
     parcel->writeInt32(mFlags);
     parcel->writeInt32(mEdgeFlags);
     parcel->writeInt32(mMetaState);
diff --git a/libs/input/InputTransport.cpp b/libs/input/InputTransport.cpp
index 090ee53..0382f57 100644
--- a/libs/input/InputTransport.cpp
+++ b/libs/input/InputTransport.cpp
@@ -283,6 +283,7 @@
         int32_t deviceId,
         int32_t source,
         int32_t action,
+        int32_t actionButton,
         int32_t flags,
         int32_t edgeFlags,
         int32_t metaState,
@@ -298,12 +299,12 @@
         const PointerCoords* pointerCoords) {
 #if DEBUG_TRANSPORT_ACTIONS
     ALOGD("channel '%s' publisher ~ publishMotionEvent: seq=%u, deviceId=%d, source=0x%x, "
-            "action=0x%x, flags=0x%x, edgeFlags=0x%x, metaState=0x%x, buttonState=0x%x, "
-            "xOffset=%f, yOffset=%f, "
+            "action=0x%x, actionButton=0x%08x, flags=0x%x, edgeFlags=0x%x, "
+            "metaState=0x%x, buttonState=0x%x, xOffset=%f, yOffset=%f, "
             "xPrecision=%f, yPrecision=%f, downTime=%lld, eventTime=%lld, "
             "pointerCount=%" PRIu32,
             mChannel->getName().string(), seq,
-            deviceId, source, action, flags, edgeFlags, metaState, buttonState,
+            deviceId, source, action, actionButton, flags, edgeFlags, metaState, buttonState,
             xOffset, yOffset, xPrecision, yPrecision, downTime, eventTime, pointerCount);
 #endif
 
@@ -324,6 +325,7 @@
     msg.body.motion.deviceId = deviceId;
     msg.body.motion.source = source;
     msg.body.motion.action = action;
+    msg.body.motion.actionButton = actionButton;
     msg.body.motion.flags = flags;
     msg.body.motion.edgeFlags = edgeFlags;
     msg.body.motion.metaState = metaState;
@@ -907,6 +909,7 @@
             msg->body.motion.deviceId,
             msg->body.motion.source,
             msg->body.motion.action,
+            msg->body.motion.actionButton,
             msg->body.motion.flags,
             msg->body.motion.edgeFlags,
             msg->body.motion.metaState,
diff --git a/services/inputflinger/InputDispatcher.cpp b/services/inputflinger/InputDispatcher.cpp
index 9157bc1..a87cc77 100644
--- a/services/inputflinger/InputDispatcher.cpp
+++ b/services/inputflinger/InputDispatcher.cpp
@@ -119,7 +119,7 @@
     return true;
 }
 
-static bool isValidMotionAction(int32_t action, size_t pointerCount) {
+static bool isValidMotionAction(int32_t action, int32_t actionButton, int32_t pointerCount) {
     switch (action & AMOTION_EVENT_ACTION_MASK) {
     case AMOTION_EVENT_ACTION_DOWN:
     case AMOTION_EVENT_ACTION_UP:
@@ -136,14 +136,17 @@
         int32_t index = getMotionEventActionPointerIndex(action);
         return index >= 0 && size_t(index) < pointerCount;
     }
+    case AMOTION_EVENT_ACTION_BUTTON_PRESS:
+    case AMOTION_EVENT_ACTION_BUTTON_RELEASE:
+        return actionButton != 0;
     default:
         return false;
     }
 }
 
-static bool validateMotionEvent(int32_t action, size_t pointerCount,
+static bool validateMotionEvent(int32_t action, int32_t actionButton, size_t pointerCount,
         const PointerProperties* pointerProperties) {
-    if (! isValidMotionAction(action, pointerCount)) {
+    if (! isValidMotionAction(action, actionButton, pointerCount)) {
         ALOGE("Motion event has invalid action code 0x%x", action);
         return false;
     }
@@ -874,12 +877,12 @@
 void InputDispatcher::logOutboundMotionDetailsLocked(const char* prefix, const MotionEntry* entry) {
 #if DEBUG_OUTBOUND_EVENT_DETAILS
     ALOGD("%seventTime=%lld, deviceId=%d, source=0x%x, policyFlags=0x%x, "
-            "action=0x%x, flags=0x%x, "
-            "metaState=0x%x, buttonState=0x%x, "
+            "action=0x%x, actionButton=0x%x, flags=0x%x, "
+            "metaState=0x%x, buttonState=0x%x,"
             "edgeFlags=0x%x, xPrecision=%f, yPrecision=%f, downTime=%lld",
             prefix,
             entry->eventTime, entry->deviceId, entry->source, entry->policyFlags,
-            entry->action, entry->flags,
+            entry->action, entry->actionButton entry->flags,
             entry->metaState, entry->buttonState,
             entry->edgeFlags, entry->xPrecision, entry->yPrecision,
             entry->downTime);
@@ -1981,10 +1984,10 @@
             // Publish the motion event.
             status = connection->inputPublisher.publishMotionEvent(dispatchEntry->seq,
                     motionEntry->deviceId, motionEntry->source,
-                    dispatchEntry->resolvedAction, dispatchEntry->resolvedFlags,
-                    motionEntry->edgeFlags, motionEntry->metaState, motionEntry->buttonState,
-                    xOffset, yOffset,
-                    motionEntry->xPrecision, motionEntry->yPrecision,
+                    dispatchEntry->resolvedAction, motionEntry->actionButton,
+                    dispatchEntry->resolvedFlags, motionEntry->edgeFlags,
+                    motionEntry->metaState, motionEntry->buttonState,
+                    xOffset, yOffset, motionEntry->xPrecision, motionEntry->yPrecision,
                     motionEntry->downTime, motionEntry->eventTime,
                     motionEntry->pointerCount, motionEntry->pointerProperties,
                     usingCoords);
@@ -2298,6 +2301,7 @@
             originalMotionEntry->source,
             originalMotionEntry->policyFlags,
             action,
+            originalMotionEntry->actionButton,
             originalMotionEntry->flags,
             originalMotionEntry->metaState,
             originalMotionEntry->buttonState,
@@ -2432,10 +2436,10 @@
 void InputDispatcher::notifyMotion(const NotifyMotionArgs* args) {
 #if DEBUG_INBOUND_EVENT_DETAILS
     ALOGD("notifyMotion - eventTime=%lld, deviceId=%d, source=0x%x, policyFlags=0x%x, "
-            "action=0x%x, flags=0x%x, metaState=0x%x, buttonState=0x%x, edgeFlags=0x%x, "
-            "xPrecision=%f, yPrecision=%f, downTime=%lld",
+            "action=0x%x, actionButton=0x%x, flags=0x%x, metaState=0x%x, buttonState=0x%x,"
+            "edgeFlags=0x%x, xPrecision=%f, yPrecision=%f, downTime=%lld",
             args->eventTime, args->deviceId, args->source, args->policyFlags,
-            args->action, args->flags, args->metaState, args->buttonState,
+            args->action, args->actionButton, args->flags, args->metaState, args->buttonState,
             args->edgeFlags, args->xPrecision, args->yPrecision, args->downTime);
     for (uint32_t i = 0; i < args->pointerCount; i++) {
         ALOGD("  Pointer %d: id=%d, toolType=%d, "
@@ -2455,7 +2459,8 @@
                 args->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION));
     }
 #endif
-    if (!validateMotionEvent(args->action, args->pointerCount, args->pointerProperties)) {
+    if (!validateMotionEvent(args->action, args->actionButton,
+                args->pointerCount, args->pointerProperties)) {
         return;
     }
 
@@ -2471,9 +2476,9 @@
             mLock.unlock();
 
             MotionEvent event;
-            event.initialize(args->deviceId, args->source, args->action, args->flags,
-                    args->edgeFlags, args->metaState, args->buttonState, 0, 0,
-                    args->xPrecision, args->yPrecision,
+            event.initialize(args->deviceId, args->source, args->action, args->actionButton,
+                    args->flags, args->edgeFlags, args->metaState, args->buttonState,
+                    0, 0, args->xPrecision, args->yPrecision,
                     args->downTime, args->eventTime,
                     args->pointerCount, args->pointerProperties, args->pointerCoords);
 
@@ -2488,7 +2493,8 @@
         // Just enqueue a new motion event.
         MotionEntry* newEntry = new MotionEntry(args->eventTime,
                 args->deviceId, args->source, policyFlags,
-                args->action, args->flags, args->metaState, args->buttonState,
+                args->action, args->actionButton, args->flags,
+                args->metaState, args->buttonState,
                 args->edgeFlags, args->xPrecision, args->yPrecision, args->downTime,
                 args->displayId,
                 args->pointerCount, args->pointerProperties, args->pointerCoords, 0, 0);
@@ -2589,7 +2595,8 @@
         int32_t action = motionEvent->getAction();
         size_t pointerCount = motionEvent->getPointerCount();
         const PointerProperties* pointerProperties = motionEvent->getPointerProperties();
-        if (! validateMotionEvent(action, pointerCount, pointerProperties)) {
+        int32_t actionButton = motionEvent->getActionButton();
+        if (! validateMotionEvent(action, actionButton, pointerCount, pointerProperties)) {
             return INPUT_EVENT_INJECTION_FAILED;
         }
 
@@ -2603,7 +2610,7 @@
         const PointerCoords* samplePointerCoords = motionEvent->getSamplePointerCoords();
         firstInjectedEntry = new MotionEntry(*sampleEventTimes,
                 motionEvent->getDeviceId(), motionEvent->getSource(), policyFlags,
-                action, motionEvent->getFlags(),
+                action, actionButton, motionEvent->getFlags(),
                 motionEvent->getMetaState(), motionEvent->getButtonState(),
                 motionEvent->getEdgeFlags(),
                 motionEvent->getXPrecision(), motionEvent->getYPrecision(),
@@ -2616,7 +2623,7 @@
             samplePointerCoords += pointerCount;
             MotionEntry* nextInjectedEntry = new MotionEntry(*sampleEventTimes,
                     motionEvent->getDeviceId(), motionEvent->getSource(), policyFlags,
-                    action, motionEvent->getFlags(),
+                    action, actionButton, motionEvent->getFlags(),
                     motionEvent->getMetaState(), motionEvent->getButtonState(),
                     motionEvent->getEdgeFlags(),
                     motionEvent->getXPrecision(), motionEvent->getYPrecision(),
@@ -3907,18 +3914,18 @@
 
 // --- InputDispatcher::MotionEntry ---
 
-InputDispatcher::MotionEntry::MotionEntry(nsecs_t eventTime,
-        int32_t deviceId, uint32_t source, uint32_t policyFlags, int32_t action, int32_t flags,
-        int32_t metaState, int32_t buttonState,
-        int32_t edgeFlags, float xPrecision, float yPrecision,
-        nsecs_t downTime, int32_t displayId, uint32_t pointerCount,
+InputDispatcher::MotionEntry::MotionEntry(nsecs_t eventTime, int32_t deviceId,
+        uint32_t source, uint32_t policyFlags, int32_t action, int32_t actionButton,
+        int32_t flags, int32_t metaState, int32_t buttonState, int32_t edgeFlags,
+        float xPrecision, float yPrecision, nsecs_t downTime,
+        int32_t displayId, uint32_t pointerCount,
         const PointerProperties* pointerProperties, const PointerCoords* pointerCoords,
         float xOffset, float yOffset) :
         EventEntry(TYPE_MOTION, eventTime, policyFlags),
         eventTime(eventTime),
-        deviceId(deviceId), source(source), action(action), flags(flags),
-        metaState(metaState), buttonState(buttonState), edgeFlags(edgeFlags),
-        xPrecision(xPrecision), yPrecision(yPrecision),
+        deviceId(deviceId), source(source), action(action), actionButton(actionButton),
+        flags(flags), metaState(metaState), buttonState(buttonState),
+        edgeFlags(edgeFlags), xPrecision(xPrecision), yPrecision(yPrecision),
         downTime(downTime), displayId(displayId), pointerCount(pointerCount) {
     for (uint32_t i = 0; i < pointerCount; i++) {
         this->pointerProperties[i].copyFrom(pointerProperties[i]);
@@ -3933,10 +3940,10 @@
 }
 
 void InputDispatcher::MotionEntry::appendDescription(String8& msg) const {
-    msg.appendFormat("MotionEvent(deviceId=%d, source=0x%08x, action=%d, "
-            "flags=0x%08x, metaState=0x%08x, buttonState=0x%08x, edgeFlags=0x%08x, "
-            "xPrecision=%.1f, yPrecision=%.1f, displayId=%d, pointers=[",
-            deviceId, source, action, flags, metaState, buttonState, edgeFlags,
+    msg.appendFormat("MotionEvent(deviceId=%d, source=0x%08x, action=%d, actionButton=0x%08x, "
+            "flags=0x%08x, metaState=0x%08x, buttonState=0x%08x, "
+            "edgeFlags=0x%08x, xPrecision=%.1f, yPrecision=%.1f, displayId=%d, pointers=[",
+            deviceId, source, action, actionButton, flags, metaState, buttonState, edgeFlags,
             xPrecision, yPrecision, displayId);
     for (uint32_t i = 0; i < pointerCount; i++) {
         if (i) {
@@ -4237,7 +4244,7 @@
                     memento.hovering
                             ? AMOTION_EVENT_ACTION_HOVER_EXIT
                             : AMOTION_EVENT_ACTION_CANCEL,
-                    memento.flags, 0, 0, 0,
+                    memento.flags, 0, 0, 0, 0,
                     memento.xPrecision, memento.yPrecision, memento.downTime,
                     memento.displayId,
                     memento.pointerCount, memento.pointerProperties, memento.pointerCoords,
diff --git a/services/inputflinger/InputDispatcher.h b/services/inputflinger/InputDispatcher.h
index 8c78a44..9a340c9 100644
--- a/services/inputflinger/InputDispatcher.h
+++ b/services/inputflinger/InputDispatcher.h
@@ -504,6 +504,7 @@
         int32_t deviceId;
         uint32_t source;
         int32_t action;
+        int32_t actionButton;
         int32_t flags;
         int32_t metaState;
         int32_t buttonState;
@@ -518,10 +519,10 @@
 
         MotionEntry(nsecs_t eventTime,
                 int32_t deviceId, uint32_t source, uint32_t policyFlags,
-                int32_t action, int32_t flags,
+                int32_t action, int32_t actionButton, int32_t flags,
                 int32_t metaState, int32_t buttonState, int32_t edgeFlags,
-                float xPrecision, float yPrecision,
-                nsecs_t downTime, int32_t displayId, uint32_t pointerCount,
+                float xPrecision, float yPrecision, nsecs_t downTime,
+                int32_t displayId, uint32_t pointerCount,
                 const PointerProperties* pointerProperties, const PointerCoords* pointerCoords,
                 float xOffset, float yOffset);
         virtual void appendDescription(String8& msg) const;
diff --git a/services/inputflinger/InputListener.cpp b/services/inputflinger/InputListener.cpp
index 85bb0ed..dded47d 100644
--- a/services/inputflinger/InputListener.cpp
+++ b/services/inputflinger/InputListener.cpp
@@ -68,12 +68,13 @@
 
 NotifyMotionArgs::NotifyMotionArgs(nsecs_t eventTime, int32_t deviceId, uint32_t source,
         uint32_t policyFlags,
-        int32_t action, int32_t flags, int32_t metaState, int32_t buttonState,
-        int32_t edgeFlags, int32_t displayId, uint32_t pointerCount,
+        int32_t action, int32_t actionButton, int32_t flags, int32_t metaState,
+        int32_t buttonState, int32_t edgeFlags, int32_t displayId, uint32_t pointerCount,
         const PointerProperties* pointerProperties, const PointerCoords* pointerCoords,
         float xPrecision, float yPrecision, nsecs_t downTime) :
         eventTime(eventTime), deviceId(deviceId), source(source), policyFlags(policyFlags),
-        action(action), flags(flags), metaState(metaState), buttonState(buttonState),
+        action(action), actionButton(actionButton),
+        flags(flags), metaState(metaState), buttonState(buttonState),
         edgeFlags(edgeFlags), displayId(displayId), pointerCount(pointerCount),
         xPrecision(xPrecision), yPrecision(yPrecision), downTime(downTime) {
     for (uint32_t i = 0; i < pointerCount; i++) {
@@ -85,10 +86,9 @@
 NotifyMotionArgs::NotifyMotionArgs(const NotifyMotionArgs& other) :
         eventTime(other.eventTime), deviceId(other.deviceId), source(other.source),
         policyFlags(other.policyFlags),
-        action(other.action), flags(other.flags),
+        action(other.action), actionButton(other.actionButton), flags(other.flags),
         metaState(other.metaState), buttonState(other.buttonState),
-        edgeFlags(other.edgeFlags), displayId(other.displayId),
-        pointerCount(other.pointerCount),
+        edgeFlags(other.edgeFlags), displayId(other.displayId), pointerCount(other.pointerCount),
         xPrecision(other.xPrecision), yPrecision(other.yPrecision), downTime(other.downTime) {
     for (uint32_t i = 0; i < pointerCount; i++) {
         pointerProperties[i].copyFrom(other.pointerProperties[i]);
diff --git a/services/inputflinger/InputListener.h b/services/inputflinger/InputListener.h
index 78ae10f..1ec09ce 100644
--- a/services/inputflinger/InputListener.h
+++ b/services/inputflinger/InputListener.h
@@ -84,6 +84,7 @@
     uint32_t source;
     uint32_t policyFlags;
     int32_t action;
+    int32_t actionButton;
     int32_t flags;
     int32_t metaState;
     int32_t buttonState;
@@ -99,7 +100,8 @@
     inline NotifyMotionArgs() { }
 
     NotifyMotionArgs(nsecs_t eventTime, int32_t deviceId, uint32_t source, uint32_t policyFlags,
-            int32_t action, int32_t flags, int32_t metaState, int32_t buttonState,
+            int32_t action, int32_t actionButton, int32_t flags,
+            int32_t metaState, int32_t buttonState,
             int32_t edgeFlags, int32_t displayId, uint32_t pointerCount,
             const PointerProperties* pointerProperties, const PointerCoords* pointerCoords,
             float xPrecision, float yPrecision, nsecs_t downTime);
diff --git a/services/inputflinger/InputReader.cpp b/services/inputflinger/InputReader.cpp
index 2888785..b54503e 100644
--- a/services/inputflinger/InputReader.cpp
+++ b/services/inputflinger/InputReader.cpp
@@ -1442,10 +1442,10 @@
 uint32_t TouchButtonAccumulator::getButtonState() const {
     uint32_t result = 0;
     if (mBtnStylus) {
-        result |= AMOTION_EVENT_BUTTON_SECONDARY;
+        result |= AMOTION_EVENT_BUTTON_STYLUS_PRIMARY;
     }
     if (mBtnStylus2) {
-        result |= AMOTION_EVENT_BUTTON_TERTIARY;
+        result |= AMOTION_EVENT_BUTTON_STYLUS_SECONDARY;
     }
     return result;
 }
@@ -2547,7 +2547,8 @@
     }
     nsecs_t downTime = mDownTime;
     bool buttonsChanged = currentButtonState != lastButtonState;
-    bool buttonsPressed = currentButtonState & ~lastButtonState;
+    int32_t buttonsPressed = currentButtonState & ~lastButtonState;
+    int32_t buttonsReleased = lastButtonState & ~currentButtonState;
 
     float deltaX = mCursorMotionAccumulator.getRelativeX() * mXScale;
     float deltaY = mCursorMotionAccumulator.getRelativeY() * mYScale;
@@ -2623,6 +2624,7 @@
     // Send motion event.
     if (downChanged || moved || scrolled || buttonsChanged) {
         int32_t metaState = mContext->getGlobalMetaState();
+        int32_t buttonState = lastButtonState;
         int32_t motionEventAction;
         if (downChanged) {
             motionEventAction = down ? AMOTION_EVENT_ACTION_DOWN : AMOTION_EVENT_ACTION_UP;
@@ -2632,17 +2634,48 @@
             motionEventAction = AMOTION_EVENT_ACTION_HOVER_MOVE;
         }
 
+        if (buttonsReleased) {
+            BitSet32 released(buttonsReleased);
+            while (!released.isEmpty()) {
+                int32_t actionButton = BitSet32::valueForBit(released.clearFirstMarkedBit());
+                buttonState &= ~actionButton;
+                NotifyMotionArgs releaseArgs(when, getDeviceId(), mSource, policyFlags,
+                        AMOTION_EVENT_ACTION_BUTTON_RELEASE, actionButton, 0,
+                        metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                        displayId, 1, &pointerProperties, &pointerCoords,
+                        mXPrecision, mYPrecision, downTime);
+                getListener()->notifyMotion(&releaseArgs);
+            }
+        }
+
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                motionEventAction, 0, metaState, currentButtonState, 0,
+                motionEventAction, 0, 0, metaState, currentButtonState,
+                AMOTION_EVENT_EDGE_FLAG_NONE,
                 displayId, 1, &pointerProperties, &pointerCoords,
                 mXPrecision, mYPrecision, downTime);
         getListener()->notifyMotion(&args);
 
+        if (buttonsPressed) {
+            BitSet32 pressed(buttonsPressed);
+            while (!pressed.isEmpty()) {
+                int32_t actionButton = BitSet32::valueForBit(pressed.clearFirstMarkedBit());
+                buttonState |= actionButton;
+                NotifyMotionArgs pressArgs(when, getDeviceId(), mSource, policyFlags,
+                        AMOTION_EVENT_ACTION_BUTTON_PRESS, actionButton, 0,
+                        metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                        displayId, 1, &pointerProperties, &pointerCoords,
+                        mXPrecision, mYPrecision, downTime);
+                getListener()->notifyMotion(&pressArgs);
+            }
+        }
+
+        ALOG_ASSERT(buttonState == currentButtonState);
+
         // Send hover move after UP to tell the application that the mouse is hovering now.
         if (motionEventAction == AMOTION_EVENT_ACTION_UP
                 && mPointerController != NULL) {
             NotifyMotionArgs hoverArgs(when, getDeviceId(), mSource, policyFlags,
-                    AMOTION_EVENT_ACTION_HOVER_MOVE, 0,
+                    AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
                     metaState, currentButtonState, AMOTION_EVENT_EDGE_FLAG_NONE,
                     displayId, 1, &pointerProperties, &pointerCoords,
                     mXPrecision, mYPrecision, downTime);
@@ -2655,7 +2688,7 @@
             pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
 
             NotifyMotionArgs scrollArgs(when, getDeviceId(), mSource, policyFlags,
-                    AMOTION_EVENT_ACTION_SCROLL, 0, metaState, currentButtonState,
+                    AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState, currentButtonState,
                     AMOTION_EVENT_EDGE_FLAG_NONE,
                     displayId, 1, &pointerProperties, &pointerCoords,
                     mXPrecision, mYPrecision, downTime);
@@ -2787,8 +2820,7 @@
     dump.appendFormat(INDENT4 "TiltYCenter: %0.3f\n", mTiltYCenter);
     dump.appendFormat(INDENT4 "TiltYScale: %0.3f\n", mTiltYScale);
 
-    dump.appendFormat(INDENT3 "Last Button State: 0x%08x\n", mLastRawState.buttonState);
-
+    dump.appendFormat(INDENT3 "Last Raw Button State: 0x%08x\n", mLastRawState.buttonState);
     dump.appendFormat(INDENT3 "Last Raw Touch: pointerCount=%d\n",
             mLastRawState.rawPointerData.pointerCount);
     for (uint32_t i = 0; i < mLastRawState.rawPointerData.pointerCount; i++) {
@@ -2804,6 +2836,7 @@
                 pointer.toolType, toString(pointer.isHovering));
     }
 
+    dump.appendFormat(INDENT3 "Last Cooked Button State: 0x%08x\n", mLastCookedState.buttonState);
     dump.appendFormat(INDENT3 "Last Cooked Touch: pointerCount=%d\n",
             mLastCookedState.cookedPointerData.pointerCount);
     for (uint32_t i = 0; i < mLastCookedState.cookedPointerData.pointerCount; i++) {
@@ -3994,7 +4027,7 @@
 
     // Synthesize key down from raw buttons if needed.
     synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, getDeviceId(), mSource,
-            policyFlags, mLastRawState.buttonState, mCurrentRawState.buttonState);
+            policyFlags, mLastCookedState.buttonState, mCurrentCookedState.buttonState);
 
     // Dispatch the touches either directly or by translation through a pointer on screen.
     if (mDeviceMode == DEVICE_MODE_POINTER) {
@@ -4051,14 +4084,16 @@
                     mCurrentCookedState.cookedPointerData.touchingIdBits);
         }
 
+        dispatchButtonRelease(when, policyFlags);
         dispatchHoverExit(when, policyFlags);
         dispatchTouches(when, policyFlags);
         dispatchHoverEnterAndMove(when, policyFlags);
+        dispatchButtonPress(when, policyFlags);
     }
 
     // Synthesize key up from raw buttons if needed.
     synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, getDeviceId(), mSource,
-            policyFlags, mLastRawState.buttonState, mCurrentRawState.buttonState);
+            policyFlags, mLastCookedState.buttonState, mCurrentCookedState.buttonState);
 
     // Clear some transient state.
     mCurrentRawState.rawVScroll = 0;
@@ -4070,7 +4105,7 @@
 }
 
 void TouchInputMapper::applyExternalStylusButtonState(nsecs_t when) {
-    if (mDeviceMode == DEVICE_MODE_DIRECT && hasExternalStylus()) {
+    if (mDeviceMode == DEVICE_MODE_DIRECT && hasExternalStylus() && mExternalStylusId != -1) {
         mCurrentRawState.buttonState |= mExternalStylusState.buttons;
     }
 }
@@ -4282,14 +4317,14 @@
     BitSet32 currentIdBits = mCurrentCookedState.cookedPointerData.touchingIdBits;
     BitSet32 lastIdBits = mLastCookedState.cookedPointerData.touchingIdBits;
     int32_t metaState = getContext()->getGlobalMetaState();
-    int32_t buttonState = mCurrentRawState.buttonState;
+    int32_t buttonState = mCurrentCookedState.buttonState;
 
     if (currentIdBits == lastIdBits) {
         if (!currentIdBits.isEmpty()) {
             // No pointer id changes so this is a move event.
             // The listener takes care of batching moves so we don't have to deal with that here.
             dispatchMotion(when, policyFlags, mSource,
-                    AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState,
+                    AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState,
                     AMOTION_EVENT_EDGE_FLAG_NONE,
                     mCurrentCookedState.cookedPointerData.pointerProperties,
                     mCurrentCookedState.cookedPointerData.pointerCoords,
@@ -4315,7 +4350,7 @@
                 mLastCookedState.cookedPointerData.pointerCoords,
                 mLastCookedState.cookedPointerData.idToIndex,
                 moveIdBits);
-        if (buttonState != mLastRawState.buttonState) {
+        if (buttonState != mLastCookedState.buttonState) {
             moveNeeded = true;
         }
 
@@ -4324,12 +4359,11 @@
             uint32_t upId = upIdBits.clearFirstMarkedBit();
 
             dispatchMotion(when, policyFlags, mSource,
-                    AMOTION_EVENT_ACTION_POINTER_UP, 0, metaState, buttonState, 0,
+                    AMOTION_EVENT_ACTION_POINTER_UP, 0, 0, metaState, buttonState, 0,
                     mLastCookedState.cookedPointerData.pointerProperties,
                     mLastCookedState.cookedPointerData.pointerCoords,
                     mLastCookedState.cookedPointerData.idToIndex,
-                    dispatchedIdBits, upId,
-                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+                    dispatchedIdBits, upId, mOrientedXPrecision, mOrientedYPrecision, mDownTime);
             dispatchedIdBits.clearBit(upId);
         }
 
@@ -4339,12 +4373,11 @@
         if (moveNeeded && !moveIdBits.isEmpty()) {
             ALOG_ASSERT(moveIdBits.value == dispatchedIdBits.value);
             dispatchMotion(when, policyFlags, mSource,
-                    AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState, 0,
+                    AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState, 0,
                     mCurrentCookedState.cookedPointerData.pointerProperties,
                     mCurrentCookedState.cookedPointerData.pointerCoords,
                     mCurrentCookedState.cookedPointerData.idToIndex,
-                    dispatchedIdBits, -1,
-                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+                    dispatchedIdBits, -1, mOrientedXPrecision, mOrientedYPrecision, mDownTime);
         }
 
         // Dispatch pointer down events using the new pointer locations.
@@ -4358,12 +4391,11 @@
             }
 
             dispatchMotion(when, policyFlags, mSource,
-                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, metaState, buttonState, 0,
+                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, 0, metaState, buttonState, 0,
                     mCurrentCookedState.cookedPointerData.pointerProperties,
                     mCurrentCookedState.cookedPointerData.pointerCoords,
                     mCurrentCookedState.cookedPointerData.idToIndex,
-                    dispatchedIdBits, downId,
-                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+                    dispatchedIdBits, downId, mOrientedXPrecision, mOrientedYPrecision, mDownTime);
         }
     }
 }
@@ -4374,7 +4406,7 @@
                     || !mCurrentCookedState.cookedPointerData.touchingIdBits.isEmpty())) {
         int32_t metaState = getContext()->getGlobalMetaState();
         dispatchMotion(when, policyFlags, mSource,
-                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, metaState, mLastRawState.buttonState, 0,
+                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, 0, metaState, mLastCookedState.buttonState, 0,
                 mLastCookedState.cookedPointerData.pointerProperties,
                 mLastCookedState.cookedPointerData.pointerCoords,
                 mLastCookedState.cookedPointerData.idToIndex,
@@ -4390,7 +4422,7 @@
         int32_t metaState = getContext()->getGlobalMetaState();
         if (!mSentHoverEnter) {
             dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_HOVER_ENTER,
-                    0, metaState, mCurrentRawState.buttonState, 0,
+                    0, 0, metaState, mCurrentRawState.buttonState, 0,
                     mCurrentCookedState.cookedPointerData.pointerProperties,
                     mCurrentCookedState.cookedPointerData.pointerCoords,
                     mCurrentCookedState.cookedPointerData.idToIndex,
@@ -4400,7 +4432,7 @@
         }
 
         dispatchMotion(when, policyFlags, mSource,
-                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, metaState,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0, metaState,
                 mCurrentRawState.buttonState, 0,
                 mCurrentCookedState.cookedPointerData.pointerProperties,
                 mCurrentCookedState.cookedPointerData.pointerCoords,
@@ -4410,6 +4442,48 @@
     }
 }
 
+void TouchInputMapper::dispatchButtonRelease(nsecs_t when, uint32_t policyFlags) {
+    BitSet32 releasedButtons(mLastCookedState.buttonState & ~mCurrentCookedState.buttonState);
+    const BitSet32& idBits = findActiveIdBits(mLastCookedState.cookedPointerData);
+    const int32_t metaState = getContext()->getGlobalMetaState();
+    int32_t buttonState = mLastCookedState.buttonState;
+    while (!releasedButtons.isEmpty()) {
+        int32_t actionButton = BitSet32::valueForBit(releasedButtons.clearFirstMarkedBit());
+        buttonState &= ~actionButton;
+        dispatchMotion(when, policyFlags, mSource,
+                    AMOTION_EVENT_ACTION_BUTTON_RELEASE, actionButton,
+                    0, metaState, buttonState, 0,
+                    mCurrentCookedState.cookedPointerData.pointerProperties,
+                    mCurrentCookedState.cookedPointerData.pointerCoords,
+                    mCurrentCookedState.cookedPointerData.idToIndex, idBits, -1,
+                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+    }
+}
+
+void TouchInputMapper::dispatchButtonPress(nsecs_t when, uint32_t policyFlags) {
+    BitSet32 pressedButtons(mCurrentCookedState.buttonState & ~mLastCookedState.buttonState);
+    const BitSet32& idBits = findActiveIdBits(mCurrentCookedState.cookedPointerData);
+    const int32_t metaState = getContext()->getGlobalMetaState();
+    int32_t buttonState = mLastCookedState.buttonState;
+    while (!pressedButtons.isEmpty()) {
+        int32_t actionButton = BitSet32::valueForBit(pressedButtons.clearFirstMarkedBit());
+        buttonState |= actionButton;
+        dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_BUTTON_PRESS, actionButton,
+                    0, metaState, buttonState, 0,
+                    mCurrentCookedState.cookedPointerData.pointerProperties,
+                    mCurrentCookedState.cookedPointerData.pointerCoords,
+                    mCurrentCookedState.cookedPointerData.idToIndex, idBits, -1,
+                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+    }
+}
+
+const BitSet32& TouchInputMapper::findActiveIdBits(const CookedPointerData& cookedPointerData) {
+    if (!cookedPointerData.touchingIdBits.isEmpty()) {
+        return cookedPointerData.touchingIdBits;
+    }
+    return cookedPointerData.hoveringIdBits;
+}
+
 void TouchInputMapper::cookPointerData() {
     uint32_t currentPointerCount = mCurrentRawState.rawPointerData.pointerCount;
 
@@ -4420,6 +4494,12 @@
     mCurrentCookedState.cookedPointerData.touchingIdBits =
             mCurrentRawState.rawPointerData.touchingIdBits;
 
+    if (mCurrentCookedState.cookedPointerData.pointerCount == 0) {
+        mCurrentCookedState.buttonState = 0;
+    } else {
+        mCurrentCookedState.buttonState = mCurrentRawState.buttonState;
+    }
+
     // Walk through the the active pointers and map device coordinates onto
     // surface coordinates and adjust for display orientation.
     for (uint32_t i = 0; i < currentPointerCount; i++) {
@@ -4766,7 +4846,7 @@
 
     // Send events!
     int32_t metaState = getContext()->getGlobalMetaState();
-    int32_t buttonState = mCurrentRawState.buttonState;
+    int32_t buttonState = mCurrentCookedState.buttonState;
 
     // Update last coordinates of pointers that have moved so that we observe the new
     // pointer positions at the same time as other pointers that have just gone up.
@@ -4787,7 +4867,7 @@
                 mPointerGesture.lastGestureProperties,
                 mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
                 movedGestureIdBits);
-        if (buttonState != mLastRawState.buttonState) {
+        if (buttonState != mLastCookedState.buttonState) {
             moveNeeded = true;
         }
     }
@@ -4797,12 +4877,12 @@
     if (!dispatchedGestureIdBits.isEmpty()) {
         if (cancelPreviousGesture) {
             dispatchMotion(when, policyFlags, mSource,
-                    AMOTION_EVENT_ACTION_CANCEL, 0, metaState, buttonState,
+                    AMOTION_EVENT_ACTION_CANCEL, 0, 0, metaState, buttonState,
                     AMOTION_EVENT_EDGE_FLAG_NONE,
                     mPointerGesture.lastGestureProperties,
                     mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
-                    dispatchedGestureIdBits, -1,
-                    0, 0, mPointerGesture.downTime);
+                    dispatchedGestureIdBits, -1, 0,
+                    0, mPointerGesture.downTime);
 
             dispatchedGestureIdBits.clear();
         } else {
@@ -4817,7 +4897,7 @@
                 uint32_t id = upGestureIdBits.clearFirstMarkedBit();
 
                 dispatchMotion(when, policyFlags, mSource,
-                        AMOTION_EVENT_ACTION_POINTER_UP, 0,
+                        AMOTION_EVENT_ACTION_POINTER_UP, 0, 0,
                         metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
                         mPointerGesture.lastGestureProperties,
                         mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
@@ -4832,7 +4912,8 @@
     // Send motion events for all pointers that moved.
     if (moveNeeded) {
         dispatchMotion(when, policyFlags, mSource,
-                AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState,
+                AMOTION_EVENT_EDGE_FLAG_NONE,
                 mPointerGesture.currentGestureProperties,
                 mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
                 dispatchedGestureIdBits, -1,
@@ -4852,7 +4933,7 @@
             }
 
             dispatchMotion(when, policyFlags, mSource,
-                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, metaState, buttonState, 0,
+                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, 0, metaState, buttonState, 0,
                     mPointerGesture.currentGestureProperties,
                     mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
                     dispatchedGestureIdBits, id,
@@ -4863,7 +4944,7 @@
     // Send motion events for hover.
     if (mPointerGesture.currentGestureMode == PointerGesture::HOVER) {
         dispatchMotion(when, policyFlags, mSource,
-                AMOTION_EVENT_ACTION_HOVER_MOVE, 0,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
                 metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
                 mPointerGesture.currentGestureProperties,
                 mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
@@ -4889,7 +4970,7 @@
         pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
 
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                AMOTION_EVENT_ACTION_HOVER_MOVE, 0,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
                 metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
                 mViewport.displayId, 1, &pointerProperties, &pointerCoords,
                 0, 0, mPointerGesture.downTime);
@@ -4920,7 +5001,7 @@
         int32_t metaState = getContext()->getGlobalMetaState();
         int32_t buttonState = mCurrentRawState.buttonState;
         dispatchMotion(when, policyFlags, mSource,
-                AMOTION_EVENT_ACTION_CANCEL, 0, metaState, buttonState,
+                AMOTION_EVENT_ACTION_CANCEL, 0, 0, metaState, buttonState,
                 AMOTION_EVENT_EDGE_FLAG_NONE,
                 mPointerGesture.lastGestureProperties,
                 mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
@@ -5815,7 +5896,7 @@
 
         // Send up.
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                 AMOTION_EVENT_ACTION_UP, 0, metaState, mLastRawState.buttonState, 0,
+                 AMOTION_EVENT_ACTION_UP, 0, 0, metaState, mLastRawState.buttonState, 0,
                  mViewport.displayId,
                  1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
                  mOrientedXPrecision, mOrientedYPrecision,
@@ -5828,7 +5909,7 @@
 
         // Send hover exit.
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, metaState, mLastRawState.buttonState, 0,
+                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, 0, metaState, mLastRawState.buttonState, 0,
                 mViewport.displayId,
                 1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
                 mOrientedXPrecision, mOrientedYPrecision,
@@ -5843,7 +5924,7 @@
 
             // Send down.
             NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                    AMOTION_EVENT_ACTION_DOWN, 0, metaState, mCurrentRawState.buttonState, 0,
+                    AMOTION_EVENT_ACTION_DOWN, 0, 0, metaState, mCurrentRawState.buttonState, 0,
                     mViewport.displayId,
                     1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
                     mOrientedXPrecision, mOrientedYPrecision,
@@ -5853,7 +5934,7 @@
 
         // Send move.
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                AMOTION_EVENT_ACTION_MOVE, 0, metaState, mCurrentRawState.buttonState, 0,
+                AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, mCurrentRawState.buttonState, 0,
                 mViewport.displayId,
                 1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
                 mOrientedXPrecision, mOrientedYPrecision,
@@ -5867,7 +5948,7 @@
 
             // Send hover enter.
             NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                    AMOTION_EVENT_ACTION_HOVER_ENTER, 0, metaState,
+                    AMOTION_EVENT_ACTION_HOVER_ENTER, 0, 0, metaState,
                     mCurrentRawState.buttonState, 0,
                     mViewport.displayId,
                     1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
@@ -5878,7 +5959,7 @@
 
         // Send hover move.
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, metaState,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0, metaState,
                 mCurrentRawState.buttonState, 0,
                 mViewport.displayId,
                 1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
@@ -5900,7 +5981,7 @@
         pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
 
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
-                AMOTION_EVENT_ACTION_SCROLL, 0, metaState, mCurrentRawState.buttonState, 0,
+                AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState, mCurrentRawState.buttonState, 0,
                 mViewport.displayId,
                 1, &mPointerSimple.currentProperties, &pointerCoords,
                 mOrientedXPrecision, mOrientedYPrecision,
@@ -5925,10 +6006,11 @@
 }
 
 void TouchInputMapper::dispatchMotion(nsecs_t when, uint32_t policyFlags, uint32_t source,
-        int32_t action, int32_t flags, int32_t metaState, int32_t buttonState, int32_t edgeFlags,
+        int32_t action, int32_t actionButton, int32_t flags,
+        int32_t metaState, int32_t buttonState, int32_t edgeFlags,
         const PointerProperties* properties, const PointerCoords* coords,
-        const uint32_t* idToIndex, BitSet32 idBits,
-        int32_t changedId, float xPrecision, float yPrecision, nsecs_t downTime) {
+        const uint32_t* idToIndex, BitSet32 idBits, int32_t changedId,
+        float xPrecision, float yPrecision, nsecs_t downTime) {
     PointerCoords pointerCoords[MAX_POINTERS];
     PointerProperties pointerProperties[MAX_POINTERS];
     uint32_t pointerCount = 0;
@@ -5962,7 +6044,7 @@
     }
 
     NotifyMotionArgs args(when, getDeviceId(), source, policyFlags,
-            action, flags, metaState, buttonState, edgeFlags,
+            action, actionButton, flags, metaState, buttonState, edgeFlags,
             mViewport.displayId, pointerCount, pointerProperties, pointerCoords,
             xPrecision, yPrecision, downTime);
     getListener()->notifyMotion(&args);
@@ -6879,7 +6961,7 @@
     uint32_t policyFlags = 0;
 
     NotifyMotionArgs args(when, getDeviceId(), AINPUT_SOURCE_JOYSTICK, policyFlags,
-            AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+            AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
             ADISPLAY_ID_NONE, 1, &pointerProperties, &pointerCoords, 0, 0, 0);
     getListener()->notifyMotion(&args);
 }
diff --git a/services/inputflinger/InputReader.h b/services/inputflinger/InputReader.h
index ae090c1..4062ec7 100644
--- a/services/inputflinger/InputReader.h
+++ b/services/inputflinger/InputReader.h
@@ -1432,11 +1432,14 @@
         BitSet32 stylusIdBits;
         BitSet32 mouseIdBits;
 
+        int32_t buttonState;
+
         void copyFrom(const CookedState& other) {
             cookedPointerData.copyFrom(other.cookedPointerData);
             fingerIdBits = other.fingerIdBits;
             stylusIdBits = other.stylusIdBits;
             mouseIdBits = other.mouseIdBits;
+            buttonState = other.buttonState;
         }
 
         void clear() {
@@ -1444,6 +1447,7 @@
             fingerIdBits.clear();
             stylusIdBits.clear();
             mouseIdBits.clear();
+            buttonState = 0;
         }
     };
 
@@ -1794,6 +1798,9 @@
     void dispatchTouches(nsecs_t when, uint32_t policyFlags);
     void dispatchHoverExit(nsecs_t when, uint32_t policyFlags);
     void dispatchHoverEnterAndMove(nsecs_t when, uint32_t policyFlags);
+    void dispatchButtonRelease(nsecs_t when, uint32_t policyFlags);
+    void dispatchButtonPress(nsecs_t when, uint32_t policyFlags);
+    const BitSet32& findActiveIdBits(const CookedPointerData& cookedPointerData);
     void cookPointerData();
 
     void dispatchPointerUsage(nsecs_t when, uint32_t policyFlags, PointerUsage pointerUsage);
@@ -1824,8 +1831,8 @@
     // method will take care of setting the index and transmuting the action to DOWN or UP
     // it is the first / last pointer to go down / up.
     void dispatchMotion(nsecs_t when, uint32_t policyFlags, uint32_t source,
-            int32_t action, int32_t flags, int32_t metaState, int32_t buttonState,
-            int32_t edgeFlags,
+            int32_t action, int32_t actionButton,
+            int32_t flags, int32_t metaState, int32_t buttonState, int32_t edgeFlags,
             const PointerProperties* properties, const PointerCoords* coords,
             const uint32_t* idToIndex, BitSet32 idBits,
             int32_t changedId, float xPrecision, float yPrecision, nsecs_t downTime);
diff --git a/services/inputflinger/tests/InputDispatcher_test.cpp b/services/inputflinger/tests/InputDispatcher_test.cpp
index 9b68986..2d8eaef 100644
--- a/services/inputflinger/tests/InputDispatcher_test.cpp
+++ b/services/inputflinger/tests/InputDispatcher_test.cpp
@@ -150,7 +150,7 @@
 
     // Rejects undefined motion actions.
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
-            /*action*/ -1, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            /*action*/ -1, 0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -161,7 +161,7 @@
     // Rejects pointer down with invalid index.
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
             AMOTION_EVENT_ACTION_POINTER_DOWN | (1 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT),
-            0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -171,7 +171,7 @@
 
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
             AMOTION_EVENT_ACTION_POINTER_DOWN | (-1 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT),
-            0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -182,7 +182,7 @@
     // Rejects pointer up with invalid index.
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
             AMOTION_EVENT_ACTION_POINTER_UP | (1 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT),
-            0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -192,7 +192,7 @@
 
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
             AMOTION_EVENT_ACTION_POINTER_UP | (-1 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT),
-            0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -202,7 +202,7 @@
 
     // Rejects motion events with invalid number of pointers.
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
-            AMOTION_EVENT_ACTION_DOWN, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            AMOTION_EVENT_ACTION_DOWN, 0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 0, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -211,7 +211,7 @@
             << "Should reject motion events with 0 pointers.";
 
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
-            AMOTION_EVENT_ACTION_DOWN, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            AMOTION_EVENT_ACTION_DOWN, 0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ MAX_POINTERS + 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -222,7 +222,7 @@
     // Rejects motion events with invalid pointer ids.
     pointerProperties[0].id = -1;
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
-            AMOTION_EVENT_ACTION_DOWN, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            AMOTION_EVENT_ACTION_DOWN, 0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -232,7 +232,7 @@
 
     pointerProperties[0].id = MAX_POINTER_ID + 1;
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
-            AMOTION_EVENT_ACTION_DOWN, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            AMOTION_EVENT_ACTION_DOWN, 0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 1, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(
@@ -244,7 +244,7 @@
     pointerProperties[0].id = 1;
     pointerProperties[1].id = 1;
     event.initialize(DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
-            AMOTION_EVENT_ACTION_DOWN, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
+            AMOTION_EVENT_ACTION_DOWN, 0, 0, 0, AMETA_NONE, 0, 0, 0, 0, 0,
             ARBITRARY_TIME, ARBITRARY_TIME,
             /*pointerCount*/ 2, pointerProperties, pointerCoords);
     ASSERT_EQ(INPUT_EVENT_INJECTION_FAILED, mDispatcher->injectInputEvent(