diff --git a/core/java/android/view/MotionEvent.java b/core/java/android/view/MotionEvent.java
index 4394cd8..6026d04 100644
--- a/core/java/android/view/MotionEvent.java
+++ b/core/java/android/view/MotionEvent.java
@@ -1399,6 +1399,7 @@
     private static native int nativeGetButtonState(long nativePtr);
     private static native void nativeSetButtonState(long nativePtr, int buttonState);
     private static native int nativeGetActionButton(long nativePtr);
+    private static native void nativeSetActionButton(long nativePtr, int actionButton);
     private static native void nativeOffsetLocation(long nativePtr, float deltaX, float deltaY);
     private static native float nativeGetXOffset(long nativePtr);
     private static native float nativeGetYOffset(long nativePtr);
@@ -2284,6 +2285,16 @@
     }
 
     /**
+     * Sets the action button for the event.
+     *
+     * @see #getActionButton()
+     * @hide
+     */
+    public final void setActionButton(int button) {
+        nativeSetActionButton(mNativePtr, button);
+    }
+
+    /**
      * Returns the original raw X coordinate of this event.  For touch
      * events on the screen, this is the original location of the event
      * on the screen, before it had been adjusted for the containing window
diff --git a/core/jni/android_view_MotionEvent.cpp b/core/jni/android_view_MotionEvent.cpp
index eb28c4d..98c17c0 100644
--- a/core/jni/android_view_MotionEvent.cpp
+++ b/core/jni/android_view_MotionEvent.cpp
@@ -462,6 +462,12 @@
     return event->getActionButton();
 }
 
+static void android_view_MotionEvent_nativeSetActionButton(JNIEnv* env, jclass clazz,
+        jlong nativePtr, jint button) {
+    MotionEvent* event = reinterpret_cast<MotionEvent*>(nativePtr);
+    event->setActionButton(button);
+}
+
 static jboolean android_view_MotionEvent_nativeIsTouchEvent(JNIEnv* env, jclass clazz,
         jlong nativePtr) {
     MotionEvent* event = reinterpret_cast<MotionEvent*>(nativePtr);
@@ -779,6 +785,9 @@
     { "nativeGetActionButton",
             "(J)I",
             (void*)android_view_MotionEvent_nativeGetActionButton},
+    { "nativeSetActionButton",
+            "(JI)V",
+            (void*)android_view_MotionEvent_nativeSetActionButton},
     { "nativeIsTouchEvent",
             "(J)Z",
             (void*)android_view_MotionEvent_nativeIsTouchEvent },