Add joystick support to framework.

Change-Id: I95374436708752e1a9cff3f85c5b9bc3e0987961

20 files changed, 1157 insertions, 38 deletions

diff --git a/api/current.xml b/api/current.xml
index b733d891025e..7b19677bd6f3 100644
--- a/api/current.xml
+++ b/api/current.xml
@@ -22816,6 +22816,19 @@
 <parameter name="id" type="int">
 </parameter>
 </method>
+<method name="dispatchGenericMotionEvent"
+ return="boolean"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="ev" type="android.view.MotionEvent">
+</parameter>
+</method>
 <method name="dispatchKeyEvent"
  return="boolean"
  abstract="false"
@@ -23646,6 +23659,19 @@
  visibility="public"
 >
 </method>
+<method name="onGenericMotionEvent"
+ return="boolean"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="event" type="android.view.MotionEvent">
+</parameter>
+</method>
 <method name="onKeyDown"
  return="boolean"
  abstract="false"
@@ -27595,6 +27621,19 @@
  visibility="public"
 >
 </method>
+<method name="dispatchGenericMotionEvent"
+ return="boolean"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="ev" type="android.view.MotionEvent">
+</parameter>
+</method>
 <method name="dispatchKeyEvent"
  return="boolean"
  abstract="false"
@@ -27950,6 +27989,19 @@
  visibility="public"
 >
 </method>
+<method name="onGenericMotionEvent"
+ return="boolean"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="event" type="android.view.MotionEvent">
+</parameter>
+</method>
 <method name="onKeyDown"
  return="boolean"
  abstract="false"
@@ -207180,6 +207232,17 @@
  visibility="public"
 >
 </field>
+<field name="SOURCE_CLASS_JOYSTICK"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="16"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
 <field name="SOURCE_CLASS_MASK"
  type="int"
  transient="false"
@@ -207235,6 +207298,28 @@
  visibility="public"
 >
 </field>
+<field name="SOURCE_GAMEPAD"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="1025"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="SOURCE_JOYSTICK"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="16777232"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
 <field name="SOURCE_KEYBOARD"
  type="int"
  transient="false"
@@ -209077,6 +209162,182 @@
  visibility="public"
 >
 </field>
+<field name="KEYCODE_BUTTON_1"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="188"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="KEYCODE_BUTTON_10"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="197"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="KEYCODE_BUTTON_11"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="198"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="KEYCODE_BUTTON_12"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="199"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="KEYCODE_BUTTON_13"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="200"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="KEYCODE_BUTTON_14"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="201"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="KEYCODE_BUTTON_15"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="202"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="KEYCODE_BUTTON_16"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="203"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="KEYCODE_BUTTON_2"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="189"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="KEYCODE_BUTTON_3"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="190"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="KEYCODE_BUTTON_4"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="191"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="KEYCODE_BUTTON_5"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="192"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="KEYCODE_BUTTON_6"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="193"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="KEYCODE_BUTTON_7"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="194"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="KEYCODE_BUTTON_8"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="195"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="KEYCODE_BUTTON_9"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="196"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
 <field name="KEYCODE_BUTTON_A"
  type="int"
  transient="false"
@@ -216194,6 +216455,19 @@
 <parameter name="canvas" type="android.graphics.Canvas">
 </parameter>
 </method>
+<method name="dispatchGenericMotionEvent"
+ return="boolean"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="event" type="android.view.MotionEvent">
+</parameter>
+</method>
 <method name="dispatchKeyEvent"
  return="boolean"
  abstract="false"
@@ -218336,6 +218610,19 @@
 <parameter name="previouslyFocusedRect" type="android.graphics.Rect">
 </parameter>
 </method>
+<method name="onGenericMotionEvent"
+ return="boolean"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="event" type="android.view.MotionEvent">
+</parameter>
+</method>
 <method name="onKeyDown"
  return="boolean"
  abstract="false"
@@ -225273,6 +225560,19 @@
 <parameter name="hardwareAccelerated" type="boolean">
 </parameter>
 </method>
+<method name="superDispatchGenericMotionEvent"
+ return="boolean"
+ abstract="true"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="event" type="android.view.MotionEvent">
+</parameter>
+</method>
 <method name="superDispatchKeyEvent"
  return="boolean"
  abstract="true"
@@ -225618,6 +225918,19 @@
  deprecated="not deprecated"
  visibility="public"
 >
+<method name="dispatchGenericMotionEvent"
+ return="boolean"
+ abstract="true"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="event" type="android.view.MotionEvent">
+</parameter>
+</method>
 <method name="dispatchKeyEvent"
  return="boolean"
  abstract="true"
diff --git a/core/java/android/app/Activity.java b/core/java/android/app/Activity.java
index 6f0cb45dd466..3eef7855e27a 100644
--- a/core/java/android/app/Activity.java
+++ b/core/java/android/app/Activity.java
@@ -2081,7 +2081,39 @@ public class Activity extends ContextThemeWrapper
     public boolean onTrackballEvent(MotionEvent event) {
         return false;
     }
-    
+
+    /**
+     * Called when a generic motion event was not handled by any of the
+     * views inside of the activity.
+     * <p>
+     * Generic motion events are dispatched to the focused view to describe
+     * the motions of input devices such as joysticks.  The
+     * {@link MotionEvent#getSource() source} of the motion event specifies
+     * the class of input that was received.  Implementations of this method
+     * must examine the bits in the source before processing the event.
+     * The following code example shows how this is done.
+     * </p>
+     * <code>
+     * public boolean onGenericMotionEvent(MotionEvent event) {
+     *     if ((event.getSource() &amp; InputDevice.SOURCE_CLASS_JOYSTICK) != 0) {
+     *         float x = event.getX();
+     *         float y = event.getY();
+     *         // process the joystick motion
+     *         return true;
+     *     }
+     *     return super.onGenericMotionEvent(event);
+     * }
+     * </code>
+     *
+     * @param event The generic motion event being processed.
+     *
+     * @return Return true if you have consumed the event, false if you haven't.
+     * The default implementation always returns false.
+     */
+    public boolean onGenericMotionEvent(MotionEvent event) {
+        return false;
+    }
+
     /**
      * Called whenever a key, touch, or trackball event is dispatched to the
      * activity.  Implement this method if you wish to know that the user has
@@ -2264,6 +2296,24 @@ public class Activity extends ContextThemeWrapper
         return onTrackballEvent(ev);
     }
 
+    /**
+     * Called to process generic motion events.  You can override this to
+     * intercept all generic motion events before they are dispatched to the
+     * window.  Be sure to call this implementation for generic motion events
+     * that should be handled normally.
+     *
+     * @param ev The generic motion event.
+     *
+     * @return boolean Return true if this event was consumed.
+     */
+    public boolean dispatchGenericMotionEvent(MotionEvent ev) {
+        onUserInteraction();
+        if (getWindow().superDispatchGenericMotionEvent(ev)) {
+            return true;
+        }
+        return onGenericMotionEvent(ev);
+    }
+
     public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
         event.setClassName(getClass().getName());
         event.setPackageName(getPackageName());
diff --git a/core/java/android/app/Dialog.java b/core/java/android/app/Dialog.java
index 6791400a0055..b0929dd0aa6c 100644
--- a/core/java/android/app/Dialog.java
+++ b/core/java/android/app/Dialog.java
@@ -633,7 +633,39 @@ public class Dialog implements DialogInterface, Window.Callback,
     public boolean onTrackballEvent(MotionEvent event) {
         return false;
     }
-    
+
+    /**
+     * Called when a generic motion event was not handled by any of the
+     * views inside of the dialog.
+     * <p>
+     * Generic motion events are dispatched to the focused view to describe
+     * the motions of input devices such as joysticks.  The
+     * {@link MotionEvent#getSource() source} of the motion event specifies
+     * the class of input that was received.  Implementations of this method
+     * must examine the bits in the source before processing the event.
+     * The following code example shows how this is done.
+     * </p>
+     * <code>
+     * public boolean onGenericMotionEvent(MotionEvent event) {
+     *     if ((event.getSource() &amp; InputDevice.SOURCE_CLASS_JOYSTICK) != 0) {
+     *         float x = event.getX();
+     *         float y = event.getY();
+     *         // process the joystick motion
+     *         return true;
+     *     }
+     *     return super.onGenericMotionEvent(event);
+     * }
+     * </code>
+     *
+     * @param event The generic motion event being processed.
+     *
+     * @return Return true if you have consumed the event, false if you haven't.
+     * The default implementation always returns false.
+     */
+    public boolean onGenericMotionEvent(MotionEvent event) {
+        return false;
+    }
+
     public void onWindowAttributesChanged(WindowManager.LayoutParams params) {
         if (mDecor != null) {
             mWindowManager.updateViewLayout(mDecor, params);
@@ -722,6 +754,23 @@ public class Dialog implements DialogInterface, Window.Callback,
         return onTrackballEvent(ev);
     }
 
+    /**
+     * Called to process generic motion events.  You can override this to
+     * intercept all generic motion events before they are dispatched to the
+     * window.  Be sure to call this implementation for generic motion events
+     * that should be handled normally.
+     *
+     * @param ev The generic motion event.
+     *
+     * @return boolean Return true if this event was consumed.
+     */
+    public boolean dispatchGenericMotionEvent(MotionEvent ev) {
+        if (mWindow.superDispatchGenericMotionEvent(ev)) {
+            return true;
+        }
+        return onGenericMotionEvent(ev);
+    }
+
     public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
         event.setClassName(getClass().getName());
         event.setPackageName(mContext.getPackageName());
diff --git a/core/java/android/view/InputDevice.java b/core/java/android/view/InputDevice.java
index dd04975c11d6..e799f7696c65 100755
--- a/core/java/android/view/InputDevice.java
+++ b/core/java/android/view/InputDevice.java
@@ -98,7 +98,16 @@ public final class InputDevice implements Parcelable {
      * Use {@link #getMotionRange} to query the range of positions.
      */
     public static final int SOURCE_CLASS_POSITION = 0x00000008;
-    
+
+    /**
+     * The input source is a joystick.
+     *
+     * A {@link MotionEvent} should be interpreted as absolute joystick movements.
+     *
+     * Use {@link #getMotionRange} to query the range of positions.
+     */
+    public static final int SOURCE_CLASS_JOYSTICK = 0x00000010;
+
     /**
      * The input source is unknown.
      */
@@ -117,7 +126,15 @@ public final class InputDevice implements Parcelable {
      * @see #SOURCE_CLASS_BUTTON
      */
     public static final int SOURCE_DPAD = 0x00000200 | SOURCE_CLASS_BUTTON;
-    
+
+    /**
+     * The input source is a game pad.
+     * (It may also be a {@link #SOURCE_JOYSTICK}).
+     *
+     * @see #SOURCE_CLASS_BUTTON
+     */
+    public static final int SOURCE_GAMEPAD = 0x00000400 | SOURCE_CLASS_BUTTON;
+
     /**
      * The input source is a touch screen pointing device.
      * 
@@ -148,7 +165,15 @@ public final class InputDevice implements Parcelable {
      * @see #SOURCE_CLASS_POSITION
      */
     public static final int SOURCE_TOUCHPAD = 0x00100000 | SOURCE_CLASS_POSITION;
-    
+
+    /**
+     * The input source is a joystick.
+     * (It may also be a {@link #SOURCE_GAMEPAD}).
+     *
+     * @see #SOURCE_CLASS_JOYSTICK
+     */
+    public static final int SOURCE_JOYSTICK = 0x01000000 | SOURCE_CLASS_JOYSTICK;
+
     /**
      * A special input source constant that is used when filtering input devices
      * to match devices that provide any type of input source.
diff --git a/core/java/android/view/KeyEvent.java b/core/java/android/view/KeyEvent.java
index ecf1aefc935e..695d16a2de8c 100755
--- a/core/java/android/view/KeyEvent.java
+++ b/core/java/android/view/KeyEvent.java
@@ -533,8 +533,40 @@ public class KeyEvent extends InputEvent implements Parcelable {
     /** Key code constant: App switch key.
      * Should bring up the application switcher dialog. */
     public static final int KEYCODE_APP_SWITCH      = 187;
-
-    private static final int LAST_KEYCODE           = KEYCODE_APP_SWITCH;
+    /** Key code constant: Generic Game Pad Button #1.*/
+    public static final int KEYCODE_BUTTON_1        = 188;
+    /** Key code constant: Generic Game Pad Button #2.*/
+    public static final int KEYCODE_BUTTON_2        = 189;
+    /** Key code constant: Generic Game Pad Button #3.*/
+    public static final int KEYCODE_BUTTON_3        = 190;
+    /** Key code constant: Generic Game Pad Button #4.*/
+    public static final int KEYCODE_BUTTON_4        = 191;
+    /** Key code constant: Generic Game Pad Button #5.*/
+    public static final int KEYCODE_BUTTON_5        = 192;
+    /** Key code constant: Generic Game Pad Button #6.*/
+    public static final int KEYCODE_BUTTON_6        = 193;
+    /** Key code constant: Generic Game Pad Button #7.*/
+    public static final int KEYCODE_BUTTON_7        = 194;
+    /** Key code constant: Generic Game Pad Button #8.*/
+    public static final int KEYCODE_BUTTON_8        = 195;
+    /** Key code constant: Generic Game Pad Button #9.*/
+    public static final int KEYCODE_BUTTON_9        = 196;
+    /** Key code constant: Generic Game Pad Button #10.*/
+    public static final int KEYCODE_BUTTON_10       = 197;
+    /** Key code constant: Generic Game Pad Button #11.*/
+    public static final int KEYCODE_BUTTON_11       = 198;
+    /** Key code constant: Generic Game Pad Button #12.*/
+    public static final int KEYCODE_BUTTON_12       = 199;
+    /** Key code constant: Generic Game Pad Button #13.*/
+    public static final int KEYCODE_BUTTON_13       = 200;
+    /** Key code constant: Generic Game Pad Button #14.*/
+    public static final int KEYCODE_BUTTON_14       = 201;
+    /** Key code constant: Generic Game Pad Button #15.*/
+    public static final int KEYCODE_BUTTON_15       = 202;
+    /** Key code constant: Generic Game Pad Button #16.*/
+    public static final int KEYCODE_BUTTON_16       = 203;
+
+    private static final int LAST_KEYCODE           = KEYCODE_BUTTON_16;
 
     // NOTE: If you add a new keycode here you must also add it to:
     //  isSystem()
@@ -741,6 +773,22 @@ public class KeyEvent extends InputEvent implements Parcelable {
         "KEYCODE_PROG_YELLOW",
         "KEYCODE_PROG_BLUE",
         "KEYCODE_APP_SWITCH",
+        "KEYCODE_BUTTON_1",
+        "KEYCODE_BUTTON_2",
+        "KEYCODE_BUTTON_3",
+        "KEYCODE_BUTTON_4",
+        "KEYCODE_BUTTON_5",
+        "KEYCODE_BUTTON_6",
+        "KEYCODE_BUTTON_7",
+        "KEYCODE_BUTTON_8",
+        "KEYCODE_BUTTON_9",
+        "KEYCODE_BUTTON_10",
+        "KEYCODE_BUTTON_11",
+        "KEYCODE_BUTTON_12",
+        "KEYCODE_BUTTON_13",
+        "KEYCODE_BUTTON_14",
+        "KEYCODE_BUTTON_15",
+        "KEYCODE_BUTTON_16",
     };
 
     // Symbolic names of all metakeys in bit order from least significant to most significant.
diff --git a/core/java/android/view/MotionEvent.java b/core/java/android/view/MotionEvent.java
index db2cd5056252..0a5c5c64f770 100644
--- a/core/java/android/view/MotionEvent.java
+++ b/core/java/android/view/MotionEvent.java
@@ -26,7 +26,8 @@ import android.os.SystemClock;
  * class may hold either absolute or relative movements, depending on what
  * it is being used for.
  * <p>
- * On pointing devices such as touch screens, pointer coordinates specify absolute
+ * On pointing devices with source class {@link InputDevice#SOURCE_CLASS_POINTER}
+ * such as touch screens, the pointer coordinates specify absolute
  * positions such as view X/Y coordinates.  Each complete gesture is represented
  * by a sequence of motion events with actions that describe pointer state transitions
  * and movements.  A gesture starts with a motion event with {@link #ACTION_DOWN}
@@ -38,11 +39,18 @@ import android.os.SystemClock;
  * by a motion event with {@link #ACTION_UP} or when gesture is canceled
  * with {@link #ACTION_CANCEL}.
  * </p><p>
- * On trackballs, the pointer coordinates specify relative movements as X/Y deltas.
+ * On trackball devices with source class {@link InputDevice#SOURCE_CLASS_TRACKBALL},
+ * the pointer coordinates specify relative movements as X/Y deltas.
  * A trackball gesture consists of a sequence of movements described by motion
  * events with {@link #ACTION_MOVE} interspersed with occasional {@link #ACTION_DOWN}
  * or {@link #ACTION_UP} motion events when the trackball button is pressed or released.
  * </p><p>
+ * On joystick devices with source class {@link InputDevice#SOURCE_CLASS_JOYSTICK},
+ * the pointer coordinates specify the absolute position of the joystick axes.
+ * The joystick axis values are normalized to a range of -1.0 to 1.0 where 0.0 corresponds
+ * to the center position.  More information about the set of available axes and the
+ * range of motion can be obtained using {@link InputDevice#getMotionRange}.
+ * </p><p>
  * Motion events always report movements for all pointers at once.  The number
  * of pointers only ever changes by one as individual pointers go up and down,
  * except when the gesture is canceled.
diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index f05ef8c588cd..57520d1e5bfb 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -4493,6 +4493,16 @@ public class View implements Drawable.Callback, KeyEvent.Callback, Accessibility
     }
 
     /**
+     * Pass a generic motion event down to the focused view.
+     *
+     * @param event The motion event to be dispatched.
+     * @return True if the event was handled by the view, false otherwise.
+     */
+    public boolean dispatchGenericMotionEvent(MotionEvent event) {
+        return onGenericMotionEvent(event);
+    }
+
+    /**
      * Called when the window containing this view gains or loses window focus.
      * ViewGroups should override to route to their children.
      *
@@ -4994,6 +5004,37 @@ public class View implements Drawable.Callback, KeyEvent.Callback, Accessibility
     }
 
     /**
+     * Implement this method to handle generic motion events.
+     * <p>
+     * Generic motion events are dispatched to the focused view to describe
+     * the motions of input devices such as joysticks.  The
+     * {@link MotionEvent#getSource() source} of the motion event specifies
+     * the class of input that was received.  Implementations of this method
+     * must examine the bits in the source before processing the event.
+     * The following code example shows how this is done.
+     * </p>
+     * <code>
+     * public boolean onGenericMotionEvent(MotionEvent event) {
+     *     if ((event.getSource() &amp; InputDevice.SOURCE_CLASS_JOYSTICK) != 0) {
+     *         float x = event.getX();
+     *         float y = event.getY();
+     *         // process the joystick motion
+     *         return true;
+     *     }
+     *     return super.onGenericMotionEvent(event);
+     * }
+     * </code>
+     *
+     * @param event The generic motion event being processed.
+     *
+     * @return Return true if you have consumed the event, false if you haven't.
+     * The default implementation always returns false.
+     */
+    public boolean onGenericMotionEvent(MotionEvent event) {
+        return false;
+    }
+
+    /**
      * Implement this method to handle touch screen motion events.
      *
      * @param event The motion event.
diff --git a/core/java/android/view/ViewGroup.java b/core/java/android/view/ViewGroup.java
index f6b6778ea555..dbc4779167b3 100644
--- a/core/java/android/view/ViewGroup.java
+++ b/core/java/android/view/ViewGroup.java
@@ -1124,6 +1124,19 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
      * {@inheritDoc}
      */
     @Override
+    public boolean dispatchGenericMotionEvent(MotionEvent event) {
+        if ((mPrivateFlags & (FOCUSED | HAS_BOUNDS)) == (FOCUSED | HAS_BOUNDS)) {
+            return super.dispatchGenericMotionEvent(event);
+        } else if (mFocused != null && (mFocused.mPrivateFlags & HAS_BOUNDS) == HAS_BOUNDS) {
+            return mFocused.dispatchGenericMotionEvent(event);
+        }
+        return false;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
     public boolean dispatchTouchEvent(MotionEvent ev) {
         if (!onFilterTouchEventForSecurity(ev)) {
             return false;
diff --git a/core/java/android/view/ViewRoot.java b/core/java/android/view/ViewRoot.java
index ad9e68633958..4ed97422cbde 100644
--- a/core/java/android/view/ViewRoot.java
+++ b/core/java/android/view/ViewRoot.java
@@ -128,6 +128,11 @@ public final class ViewRoot extends Handler implements ViewParent,
     final TrackballAxis mTrackballAxisX = new TrackballAxis();
     final TrackballAxis mTrackballAxisY = new TrackballAxis();
 
+    int mLastJoystickXDirection;
+    int mLastJoystickYDirection;
+    int mLastJoystickXKeyCode;
+    int mLastJoystickYKeyCode;
+
     final int[] mTmpLocation = new int[2];
 
     final TypedValue mTmpValue = new TypedValue();
@@ -1878,6 +1883,7 @@ public final class ViewRoot extends Handler implements ViewParent,
     public final static int CLOSE_SYSTEM_DIALOGS = 1014;
     public final static int DISPATCH_DRAG_EVENT = 1015;
     public final static int DISPATCH_DRAG_LOCATION_EVENT = 1016;
+    public final static int DISPATCH_GENERIC_MOTION = 1017;
 
     @Override
     public void handleMessage(Message msg) {
@@ -1914,6 +1920,9 @@ public final class ViewRoot extends Handler implements ViewParent,
         case DISPATCH_TRACKBALL:
             deliverTrackballEvent((MotionEvent) msg.obj, msg.arg1 != 0);
             break;
+        case DISPATCH_GENERIC_MOTION:
+            deliverGenericMotionEvent((MotionEvent) msg.obj, msg.arg1 != 0);
+            break;
         case DISPATCH_APP_VISIBILITY:
             handleAppVisibility(msg.arg1 != 0);
             break;
@@ -2420,6 +2429,102 @@ public final class ViewRoot extends Handler implements ViewParent,
         }
     }
 
+    private void deliverGenericMotionEvent(MotionEvent event, boolean sendDone) {
+        final int source = event.getSource();
+        final boolean isJoystick = (source & InputDevice.SOURCE_CLASS_JOYSTICK) != 0;
+
+        // If there is no view, then the event will not be handled.
+        if (mView == null || !mAdded) {
+            if (isJoystick) {
+                updateJoystickDirection(event, false);
+            }
+            finishGenericMotionEvent(event, sendDone, false);
+            return;
+        }
+
+        // Deliver the event to the view.
+        if (mView.dispatchGenericMotionEvent(event)) {
+            ensureTouchMode(false);
+            if (isJoystick) {
+                updateJoystickDirection(event, false);
+            }
+            finishGenericMotionEvent(event, sendDone, true);
+            return;
+        }
+
+        if (isJoystick) {
+            // Translate the joystick event into DPAD keys and try to deliver those.
+            updateJoystickDirection(event, true);
+            finishGenericMotionEvent(event, sendDone, true);
+        } else {
+            finishGenericMotionEvent(event, sendDone, false);
+        }
+    }
+
+    private void finishGenericMotionEvent(MotionEvent event, boolean sendDone, boolean handled) {
+        event.recycle();
+        if (sendDone) {
+            finishInputEvent(handled);
+        }
+    }
+
+    private void updateJoystickDirection(MotionEvent event, boolean synthesizeNewKeys) {
+        final long time = event.getEventTime();
+        final int metaState = event.getMetaState();
+        final int deviceId = event.getDeviceId();
+        final int source = event.getSource();
+        final int xDirection = joystickAxisValueToDirection(event.getX());
+        final int yDirection = joystickAxisValueToDirection(event.getY());
+
+        if (xDirection != mLastJoystickXDirection) {
+            if (mLastJoystickXKeyCode != 0) {
+                deliverKeyEvent(new KeyEvent(time, time,
+                        KeyEvent.ACTION_UP, mLastJoystickXKeyCode, 0, metaState,
+                        deviceId, 0, KeyEvent.FLAG_FALLBACK, source), false);
+                mLastJoystickXKeyCode = 0;
+            }
+
+            mLastJoystickXDirection = xDirection;
+
+            if (xDirection != 0 && synthesizeNewKeys) {
+                mLastJoystickXKeyCode = xDirection > 0
+                        ? KeyEvent.KEYCODE_DPAD_RIGHT : KeyEvent.KEYCODE_DPAD_LEFT;
+                deliverKeyEvent(new KeyEvent(time, time,
+                        KeyEvent.ACTION_DOWN, mLastJoystickXKeyCode, 0, metaState,
+                        deviceId, 0, KeyEvent.FLAG_FALLBACK, source), false);
+            }
+        }
+
+        if (yDirection != mLastJoystickYDirection) {
+            if (mLastJoystickYKeyCode != 0) {
+                deliverKeyEvent(new KeyEvent(time, time,
+                        KeyEvent.ACTION_UP, mLastJoystickYKeyCode, 0, metaState,
+                        deviceId, 0, KeyEvent.FLAG_FALLBACK, source), false);
+                mLastJoystickYKeyCode = 0;
+            }
+
+            mLastJoystickYDirection = yDirection;
+
+            if (yDirection != 0 && synthesizeNewKeys) {
+                mLastJoystickYKeyCode = yDirection > 0
+                        ? KeyEvent.KEYCODE_DPAD_DOWN : KeyEvent.KEYCODE_DPAD_UP;
+                deliverKeyEvent(new KeyEvent(time, time,
+                        KeyEvent.ACTION_DOWN, mLastJoystickYKeyCode, 0, metaState,
+                        deviceId, 0, KeyEvent.FLAG_FALLBACK, source), false);
+            }
+        }
+    }
+
+    private static int joystickAxisValueToDirection(float value) {
+        if (value >= 0.5f) {
+            return 1;
+        } else if (value <= -0.5f) {
+            return -1;
+        } else {
+            return 0;
+        }
+    }
+
     /**
      * Returns true if the key is used for keyboard navigation.
      * @param keyEvent The key event.
@@ -3053,11 +3158,7 @@ public final class ViewRoot extends Handler implements ViewParent,
         } else if ((source & InputDevice.SOURCE_CLASS_TRACKBALL) != 0) {
             dispatchTrackball(event, sendDone);
         } else {
-            // TODO
-            Log.v(TAG, "Dropping unsupported motion event (unimplemented): " + event);
-            if (sendDone) {
-                finishInputEvent(false);
-            }
+            dispatchGenericMotion(event, sendDone);
         }
     }
 
@@ -3082,7 +3183,14 @@ public final class ViewRoot extends Handler implements ViewParent,
         msg.arg1 = sendDone ? 1 : 0;
         sendMessageAtTime(msg, event.getEventTime());
     }
-    
+
+    private void dispatchGenericMotion(MotionEvent event, boolean sendDone) {
+        Message msg = obtainMessage(DISPATCH_GENERIC_MOTION);
+        msg.obj = event;
+        msg.arg1 = sendDone ? 1 : 0;
+        sendMessageAtTime(msg, event.getEventTime());
+    }
+
     public void dispatchAppVisibility(boolean visible) {
         Message msg = obtainMessage(DISPATCH_APP_VISIBILITY);
         msg.arg1 = visible ? 1 : 0;
diff --git a/core/java/android/view/Window.java b/core/java/android/view/Window.java
index 2f27935dd331..5cbaf2a69e9d 100644
--- a/core/java/android/view/Window.java
+++ b/core/java/android/view/Window.java
@@ -185,6 +185,18 @@ public abstract class Window {
         public boolean dispatchTrackballEvent(MotionEvent event);
 
         /**
+         * Called to process generic motion events.  At the very least your
+         * implementation must call
+         * {@link android.view.Window#superDispatchGenericMotionEvent} to do the
+         * standard processing.
+         *
+         * @param event The generic motion event.
+         *
+         * @return boolean Return true if this event was consumed.
+         */
+        public boolean dispatchGenericMotionEvent(MotionEvent event);
+
+        /**
          * Called to process population of {@link AccessibilityEvent}s.
          *
          * @param event The event.
@@ -1063,6 +1075,14 @@ public abstract class Window {
     public abstract boolean superDispatchTrackballEvent(MotionEvent event);
     
     /**
+     * Used by custom windows, such as Dialog, to pass the generic motion event
+     * further down the view hierarchy. Application developers should
+     * not need to implement or call this.
+     *
+     */
+    public abstract boolean superDispatchGenericMotionEvent(MotionEvent event);
+
+    /**
      * Retrieve the top-level window decor view (containing the standard
      * window frame/decorations and the client's content inside of that), which
      * can be added as a window to the window manager.
diff --git a/core/res/res/values/attrs.xml b/core/res/res/values/attrs.xml
index 19e2b8d9c937..3f02b0ba6c98 100755
--- a/core/res/res/values/attrs.xml
+++ b/core/res/res/values/attrs.xml
@@ -1310,6 +1310,22 @@
         <enum name="KEYCODE_PROG_YELLOW" value="185" />
         <enum name="KEYCODE_PROG_BLUE" value="186" />
         <enum name="KEYCODE_APP_SWITCH" value="187" />
+        <enum name="KEYCODE_BUTTON_1" value="188" />
+        <enum name="KEYCODE_BUTTON_2" value="189" />
+        <enum name="KEYCODE_BUTTON_3" value="190" />
+        <enum name="KEYCODE_BUTTON_4" value="191" />
+        <enum name="KEYCODE_BUTTON_5" value="192" />
+        <enum name="KEYCODE_BUTTON_6" value="193" />
+        <enum name="KEYCODE_BUTTON_7" value="194" />
+        <enum name="KEYCODE_BUTTON_8" value="195" />
+        <enum name="KEYCODE_BUTTON_9" value="196" />
+        <enum name="KEYCODE_BUTTON_10" value="197" />
+        <enum name="KEYCODE_BUTTON_11" value="198" />
+        <enum name="KEYCODE_BUTTON_12" value="199" />
+        <enum name="KEYCODE_BUTTON_13" value="200" />
+        <enum name="KEYCODE_BUTTON_14" value="201" />
+        <enum name="KEYCODE_BUTTON_15" value="202" />
+        <enum name="KEYCODE_BUTTON_16" value="203" />
     </attr>
 
     <!-- ***************************************************************** -->
diff --git a/data/keyboards/Generic.kl b/data/keyboards/Generic.kl
index 1ee121e977d9..0aefc3114679 100644
--- a/data/keyboards/Generic.kl
+++ b/data/keyboards/Generic.kl
@@ -262,6 +262,24 @@ key 233   HEADSETHOOK
 # key 240 "KEY_UNKNOWN"
 
 
+key 288   BUTTON_1
+key 289   BUTTON_2
+key 290   BUTTON_3
+key 291   BUTTON_4
+key 292   BUTTON_5
+key 293   BUTTON_6
+key 294   BUTTON_7
+key 295   BUTTON_8
+key 296   BUTTON_9
+key 297   BUTTON_10
+key 298   BUTTON_11
+key 299   BUTTON_12
+key 300   BUTTON_13
+key 301   BUTTON_14
+key 302   BUTTON_15
+key 303   BUTTON_16
+
+
 key 304   BUTTON_A
 key 305   BUTTON_B
 key 306   BUTTON_C
diff --git a/include/ui/KeycodeLabels.h b/include/ui/KeycodeLabels.h
index 9b1a8975e457..dbccf29b110e 100755
--- a/include/ui/KeycodeLabels.h
+++ b/include/ui/KeycodeLabels.h
@@ -212,6 +212,22 @@ static const KeycodeLabel KEYCODES[] = {
     { "PROG_YELLOW", 185 },
     { "PROG_BLUE", 186 },
     { "APP_SWITCH", 187 },
+    { "BUTTON_1", 188 },
+    { "BUTTON_2", 189 },
+    { "BUTTON_3", 190 },
+    { "BUTTON_4", 191 },
+    { "BUTTON_5", 192 },
+    { "BUTTON_6", 193 },
+    { "BUTTON_7", 194 },
+    { "BUTTON_8", 195 },
+    { "BUTTON_9", 196 },
+    { "BUTTON_10", 197 },
+    { "BUTTON_11", 198 },
+    { "BUTTON_12", 199 },
+    { "BUTTON_13", 200 },
+    { "BUTTON_14", 201 },
+    { "BUTTON_15", 202 },
+    { "BUTTON_16", 203 },
 
     // NOTE: If you add a new keycode here you must also add it to several other files.
     //       Refer to frameworks/base/core/java/android/view/KeyEvent.java for the full list.
diff --git a/native/include/android/input.h b/native/include/android/input.h
index e196686ea37d..bad363d21471 100644
--- a/native/include/android/input.h
+++ b/native/include/android/input.h
@@ -333,6 +333,7 @@ enum {
     AINPUT_SOURCE_CLASS_POINTER = 0x00000002,
     AINPUT_SOURCE_CLASS_NAVIGATION = 0x00000004,
     AINPUT_SOURCE_CLASS_POSITION = 0x00000008,
+    AINPUT_SOURCE_CLASS_JOYSTICK = 0x00000010,
 };
 
 enum {
@@ -340,10 +341,12 @@ enum {
 
     AINPUT_SOURCE_KEYBOARD = 0x00000100 | AINPUT_SOURCE_CLASS_BUTTON,
     AINPUT_SOURCE_DPAD = 0x00000200 | AINPUT_SOURCE_CLASS_BUTTON,
+    AINPUT_SOURCE_GAMEPAD = 0x00000400 | AINPUT_SOURCE_CLASS_BUTTON,
     AINPUT_SOURCE_TOUCHSCREEN = 0x00001000 | AINPUT_SOURCE_CLASS_POINTER,
     AINPUT_SOURCE_MOUSE = 0x00002000 | AINPUT_SOURCE_CLASS_POINTER,
     AINPUT_SOURCE_TRACKBALL = 0x00010000 | AINPUT_SOURCE_CLASS_NAVIGATION,
     AINPUT_SOURCE_TOUCHPAD = 0x00100000 | AINPUT_SOURCE_CLASS_POSITION,
+    AINPUT_SOURCE_JOYSTICK = 0x01000000 | AINPUT_SOURCE_CLASS_JOYSTICK,
 
     AINPUT_SOURCE_ANY = 0xffffff00,
 };
diff --git a/native/include/android/keycodes.h b/native/include/android/keycodes.h
index b026a0c9421b..c4a7eff947b1 100644
--- a/native/include/android/keycodes.h
+++ b/native/include/android/keycodes.h
@@ -231,6 +231,22 @@ enum {
     AKEYCODE_PROG_YELLOW     = 185,
     AKEYCODE_PROG_BLUE       = 186,
     AKEYCODE_APP_SWITCH      = 187,
+    AKEYCODE_BUTTON_1        = 188,
+    AKEYCODE_BUTTON_2        = 189,
+    AKEYCODE_BUTTON_3        = 190,
+    AKEYCODE_BUTTON_4        = 191,
+    AKEYCODE_BUTTON_5        = 192,
+    AKEYCODE_BUTTON_6        = 193,
+    AKEYCODE_BUTTON_7        = 194,
+    AKEYCODE_BUTTON_8        = 195,
+    AKEYCODE_BUTTON_9        = 196,
+    AKEYCODE_BUTTON_10       = 197,
+    AKEYCODE_BUTTON_11       = 198,
+    AKEYCODE_BUTTON_12       = 199,
+    AKEYCODE_BUTTON_13       = 200,
+    AKEYCODE_BUTTON_14       = 201,
+    AKEYCODE_BUTTON_15       = 202,
+    AKEYCODE_BUTTON_16       = 203,
 
     // NOTE: If you add a new keycode here you must also add it to several other files.
     //       Refer to frameworks/base/core/java/android/view/KeyEvent.java for the full list.
diff --git a/policy/src/com/android/internal/policy/impl/PhoneWindow.java b/policy/src/com/android/internal/policy/impl/PhoneWindow.java
index d6b7366ea168..8e670b8357fb 100644
--- a/policy/src/com/android/internal/policy/impl/PhoneWindow.java
+++ b/policy/src/com/android/internal/policy/impl/PhoneWindow.java
@@ -1278,6 +1278,11 @@ public class PhoneWindow extends Window implements MenuBuilder.Callback {
         return mDecor.superDispatchTrackballEvent(event);
     }
 
+    @Override
+    public boolean superDispatchGenericMotionEvent(MotionEvent event) {
+        return mDecor.superDispatchGenericMotionEvent(event);
+    }
+
     /**
      * A key was pressed down and not handled by anything else in the window.
      *
@@ -1691,6 +1696,13 @@ public class PhoneWindow extends Window implements MenuBuilder.Callback {
                     .dispatchTrackballEvent(ev);
         }
 
+        @Override
+        public boolean dispatchGenericMotionEvent(MotionEvent ev) {
+            final Callback cb = getCallback();
+            return cb != null && mFeatureId < 0 ? cb.dispatchGenericMotionEvent(ev) : super
+                    .dispatchGenericMotionEvent(ev);
+        }
+
         public boolean superDispatchKeyEvent(KeyEvent event) {
             return super.dispatchKeyEvent(event);
         }
@@ -1707,6 +1719,10 @@ public class PhoneWindow extends Window implements MenuBuilder.Callback {
             return super.dispatchTrackballEvent(event);
         }
 
+        public boolean superDispatchGenericMotionEvent(MotionEvent event) {
+            return super.dispatchGenericMotionEvent(event);
+        }
+
         @Override
         public boolean onTouchEvent(MotionEvent event) {
             return onInterceptTouchEvent(event);
diff --git a/services/input/EventHub.cpp b/services/input/EventHub.cpp
index 487e73fbbdce..efdb1775de76 100644
--- a/services/input/EventHub.cpp
+++ b/services/input/EventHub.cpp
@@ -624,7 +624,11 @@ static const int32_t GAMEPAD_KEYCODES[] = {
         AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1,
         AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2,
         AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR,
-        AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE
+        AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE,
+        AKEYCODE_BUTTON_1, AKEYCODE_BUTTON_2, AKEYCODE_BUTTON_3, AKEYCODE_BUTTON_4,
+        AKEYCODE_BUTTON_5, AKEYCODE_BUTTON_6, AKEYCODE_BUTTON_7, AKEYCODE_BUTTON_8,
+        AKEYCODE_BUTTON_9, AKEYCODE_BUTTON_10, AKEYCODE_BUTTON_11, AKEYCODE_BUTTON_12,
+        AKEYCODE_BUTTON_13, AKEYCODE_BUTTON_14, AKEYCODE_BUTTON_15, AKEYCODE_BUTTON_16,
 };
 
 int EventHub::openDevice(const char *devicePath) {
@@ -739,9 +743,9 @@ int EventHub::openDevice(const char *devicePath) {
         //}
 
         // See if this is a keyboard.  Ignore everything in the button range except for
-        // gamepads which are also considered keyboards.
+        // joystick and gamepad buttons which are also considered keyboards.
         if (containsNonZeroByte(key_bitmask, 0, sizeof_bit_array(BTN_MISC))
-                || containsNonZeroByte(key_bitmask, sizeof_bit_array(BTN_GAMEPAD),
+                || containsNonZeroByte(key_bitmask, sizeof_bit_array(BTN_JOYSTICK),
                         sizeof_bit_array(BTN_DIGI))
                 || containsNonZeroByte(key_bitmask, sizeof_bit_array(KEY_OK),
                         sizeof_bit_array(KEY_MAX + 1))) {
@@ -856,6 +860,18 @@ int EventHub::openDevice(const char *devicePath) {
         }
     }
 
+    // See if this device is a joystick.
+    // Ignore touchscreens because they use the same absolute axes for other purposes.
+    if (device->classes & INPUT_DEVICE_CLASS_GAMEPAD
+            && !(device->classes & INPUT_DEVICE_CLASS_TOUCHSCREEN)) {
+        if (test_bit(ABS_X, abs_bitmask)
+                || test_bit(ABS_Y, abs_bitmask)
+                || test_bit(ABS_HAT0X, abs_bitmask)
+                || test_bit(ABS_HAT0Y, abs_bitmask)) {
+            device->classes |= INPUT_DEVICE_CLASS_JOYSTICK;
+        }
+    }
+
     // If the device isn't recognized as something we handle, don't monitor it.
     if (device->classes == 0) {
         LOGV("Dropping device: id=%d, path='%s', name='%s'",
diff --git a/services/input/EventHub.h b/services/input/EventHub.h
index 74b7ec5e9ebc..3b5a1ea05168 100644
--- a/services/input/EventHub.h
+++ b/services/input/EventHub.h
@@ -85,7 +85,7 @@ struct RawAbsoluteAxisInfo {
     int32_t flat;      // center flat position, eg. flat == 8 means center is between -8 and 8
     int32_t fuzz;      // error tolerance, eg. fuzz == 4 means value is +/- 4 due to noise
 
-    inline int32_t getRange() { return maxValue - minValue; }
+    inline int32_t getRange() const { return maxValue - minValue; }
 
     inline void clear() {
         valid = false;
@@ -100,7 +100,7 @@ struct RawAbsoluteAxisInfo {
  * Input device classes.
  */
 enum {
-    /* The input device is a keyboard. */
+    /* The input device is a keyboard or has buttons. */
     INPUT_DEVICE_CLASS_KEYBOARD      = 0x00000001,
 
     /* The input device is an alpha-numeric keyboard (not just a dial pad). */
@@ -123,6 +123,9 @@ enum {
 
     /* The input device has switches. */
     INPUT_DEVICE_CLASS_SWITCH        = 0x00000080,
+
+    /* The input device is a joystick (implies gamepad, has joystick absolute axes). */
+    INPUT_DEVICE_CLASS_JOYSTICK      = 0x00000100,
 };
 
 /*
diff --git a/services/input/InputReader.cpp b/services/input/InputReader.cpp
index 6b6679117fab..77b745ff5708 100644
--- a/services/input/InputReader.cpp
+++ b/services/input/InputReader.cpp
@@ -250,6 +250,9 @@ InputDevice* InputReader::createDevice(int32_t deviceId, const String8& name, ui
     if (classes & INPUT_DEVICE_CLASS_DPAD) {
         keyboardSources |= AINPUT_SOURCE_DPAD;
     }
+    if (classes & INPUT_DEVICE_CLASS_GAMEPAD) {
+        keyboardSources |= AINPUT_SOURCE_GAMEPAD;
+    }
 
     if (keyboardSources != 0) {
         device->addMapper(new KeyboardInputMapper(device, keyboardSources, keyboardType));
@@ -267,6 +270,11 @@ InputDevice* InputReader::createDevice(int32_t deviceId, const String8& name, ui
         device->addMapper(new SingleTouchInputMapper(device));
     }
 
+    // Joystick-like devices.
+    if (classes & INPUT_DEVICE_CLASS_JOYSTICK) {
+        device->addMapper(new JoystickInputMapper(device));
+    }
+
     return device;
 }
 
@@ -715,6 +723,16 @@ int32_t InputMapper::getMetaState() {
     return 0;
 }
 
+void InputMapper::dumpRawAbsoluteAxisInfo(String8& dump,
+        const RawAbsoluteAxisInfo& axis, const char* name) {
+    if (axis.valid) {
+        dump.appendFormat(INDENT4 "%s: min=%d, max=%d, flat=%d, fuzz=%d\n",
+                name, axis.minValue, axis.maxValue, axis.flat, axis.fuzz);
+    } else {
+        dump.appendFormat(INDENT4 "%s: unknown range\n", name);
+    }
+}
+
 
 // --- SwitchInputMapper ---
 
@@ -857,7 +875,7 @@ void KeyboardInputMapper::process(const RawEvent* rawEvent) {
 bool KeyboardInputMapper::isKeyboardOrGamepadKey(int32_t scanCode) {
     return scanCode < BTN_MOUSE
         || scanCode >= KEY_OK
-        || (scanCode >= BTN_GAMEPAD && scanCode < BTN_DIGI);
+        || (scanCode >= BTN_JOYSTICK && scanCode < BTN_DIGI);
 }
 
 void KeyboardInputMapper::processKey(nsecs_t when, bool down, int32_t keyCode,
@@ -1486,25 +1504,16 @@ void TouchInputMapper::configureRawAxes() {
     mRawAxes.orientation.clear();
 }
 
-static void dumpAxisInfo(String8& dump, RawAbsoluteAxisInfo axis, const char* name) {
-    if (axis.valid) {
-        dump.appendFormat(INDENT4 "%s: min=%d, max=%d, flat=%d, fuzz=%d\n",
-                name, axis.minValue, axis.maxValue, axis.flat, axis.fuzz);
-    } else {
-        dump.appendFormat(INDENT4 "%s: unknown range\n", name);
-    }
-}
-
 void TouchInputMapper::dumpRawAxes(String8& dump) {
     dump.append(INDENT3 "Raw Axes:\n");
-    dumpAxisInfo(dump, mRawAxes.x, "X");
-    dumpAxisInfo(dump, mRawAxes.y, "Y");
-    dumpAxisInfo(dump, mRawAxes.pressure, "Pressure");
-    dumpAxisInfo(dump, mRawAxes.touchMajor, "TouchMajor");
-    dumpAxisInfo(dump, mRawAxes.touchMinor, "TouchMinor");
-    dumpAxisInfo(dump, mRawAxes.toolMajor, "ToolMajor");
-    dumpAxisInfo(dump, mRawAxes.toolMinor, "ToolMinor");
-    dumpAxisInfo(dump, mRawAxes.orientation, "Orientation");
+    dumpRawAbsoluteAxisInfo(dump, mRawAxes.x, "X");
+    dumpRawAbsoluteAxisInfo(dump, mRawAxes.y, "Y");
+    dumpRawAbsoluteAxisInfo(dump, mRawAxes.pressure, "Pressure");
+    dumpRawAbsoluteAxisInfo(dump, mRawAxes.touchMajor, "TouchMajor");
+    dumpRawAbsoluteAxisInfo(dump, mRawAxes.touchMinor, "TouchMinor");
+    dumpRawAbsoluteAxisInfo(dump, mRawAxes.toolMajor, "ToolMajor");
+    dumpRawAbsoluteAxisInfo(dump, mRawAxes.toolMinor, "ToolMinor");
+    dumpRawAbsoluteAxisInfo(dump, mRawAxes.orientation, "Orientation");
 }
 
 bool TouchInputMapper::configureSurfaceLocked() {
@@ -3646,4 +3655,199 @@ void MultiTouchInputMapper::configureRawAxes() {
 }
 
 
+// --- JoystickInputMapper ---
+
+JoystickInputMapper::JoystickInputMapper(InputDevice* device) :
+        InputMapper(device) {
+    initialize();
+}
+
+JoystickInputMapper::~JoystickInputMapper() {
+}
+
+uint32_t JoystickInputMapper::getSources() {
+    return AINPUT_SOURCE_JOYSTICK;
+}
+
+void JoystickInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
+    InputMapper::populateDeviceInfo(info);
+
+    if (mAxes.x.valid) {
+        info->addMotionRange(AINPUT_MOTION_RANGE_X,
+                mAxes.x.min, mAxes.x.max, mAxes.x.flat, mAxes.x.fuzz);
+    }
+    if (mAxes.y.valid) {
+        info->addMotionRange(AINPUT_MOTION_RANGE_Y,
+                mAxes.y.min, mAxes.y.max, mAxes.y.flat, mAxes.y.fuzz);
+    }
+}
+
+void JoystickInputMapper::dump(String8& dump) {
+    dump.append(INDENT2 "Joystick Input Mapper:\n");
+
+    dump.append(INDENT3 "Raw Axes:\n");
+    dumpRawAbsoluteAxisInfo(dump, mRawAxes.x, "X");
+    dumpRawAbsoluteAxisInfo(dump, mRawAxes.y, "Y");
+
+    dump.append(INDENT3 "Normalized Axes:\n");
+    dumpNormalizedAxis(dump, mAxes.x, "X");
+    dumpNormalizedAxis(dump, mAxes.y, "Y");
+    dumpNormalizedAxis(dump, mAxes.hat0X, "Hat0X");
+    dumpNormalizedAxis(dump, mAxes.hat0Y, "Hat0Y");
+}
+
+void JoystickInputMapper::dumpNormalizedAxis(String8& dump,
+        const NormalizedAxis& axis, const char* name) {
+    if (axis.valid) {
+        dump.appendFormat(INDENT4 "%s: min=%0.3f, max=%0.3f, flat=%0.3f, fuzz=%0.3f, "
+                "scale=%0.3f, center=%0.3f, precision=%0.3f, value=%0.3f\n",
+                name, axis.min, axis.max, axis.flat, axis.fuzz,
+                axis.scale, axis.center, axis.precision, axis.value);
+    } else {
+        dump.appendFormat(INDENT4 "%s: unknown range\n", name);
+    }
+}
+
+void JoystickInputMapper::configure() {
+    InputMapper::configure();
+
+    getEventHub()->getAbsoluteAxisInfo(getDeviceId(), ABS_X, & mRawAxes.x);
+    getEventHub()->getAbsoluteAxisInfo(getDeviceId(), ABS_Y, & mRawAxes.y);
+    getEventHub()->getAbsoluteAxisInfo(getDeviceId(), ABS_HAT0X, & mRawAxes.hat0X);
+    getEventHub()->getAbsoluteAxisInfo(getDeviceId(), ABS_HAT0Y, & mRawAxes.hat0Y);
+
+    mAxes.x.configure(mRawAxes.x);
+    mAxes.y.configure(mRawAxes.y);
+    mAxes.hat0X.configure(mRawAxes.hat0X);
+    mAxes.hat0Y.configure(mRawAxes.hat0Y);
+}
+
+void JoystickInputMapper::initialize() {
+    mAccumulator.clear();
+
+    mAxes.x.resetState();
+    mAxes.y.resetState();
+    mAxes.hat0X.resetState();
+    mAxes.hat0Y.resetState();
+}
+
+void JoystickInputMapper::reset() {
+    // Recenter all axes.
+    nsecs_t when = systemTime(SYSTEM_TIME_MONOTONIC);
+    mAccumulator.clear();
+    mAccumulator.fields = Accumulator::FIELD_ALL;
+    sync(when);
+
+    // Reinitialize state.
+    initialize();
+
+    InputMapper::reset();
+}
+
+void JoystickInputMapper::process(const RawEvent* rawEvent) {
+    switch (rawEvent->type) {
+    case EV_ABS:
+        switch (rawEvent->scanCode) {
+        case ABS_X:
+            mAccumulator.fields |= Accumulator::FIELD_ABS_X;
+            mAccumulator.absX = rawEvent->value;
+            break;
+        case ABS_Y:
+            mAccumulator.fields |= Accumulator::FIELD_ABS_Y;
+            mAccumulator.absY = rawEvent->value;
+            break;
+        case ABS_HAT0X:
+            mAccumulator.fields |= Accumulator::FIELD_ABS_HAT0X;
+            mAccumulator.absHat0X = rawEvent->value;
+            break;
+        case ABS_HAT0Y:
+            mAccumulator.fields |= Accumulator::FIELD_ABS_HAT0Y;
+            mAccumulator.absHat0Y = rawEvent->value;
+            break;
+        }
+        break;
+
+    case EV_SYN:
+        switch (rawEvent->scanCode) {
+        case SYN_REPORT:
+            sync(rawEvent->when);
+            break;
+        }
+        break;
+    }
+}
+
+void JoystickInputMapper::sync(nsecs_t when) {
+    uint32_t fields = mAccumulator.fields;
+    if (fields == 0) {
+        return; // no new state changes, so nothing to do
+    }
+
+    int32_t metaState = mContext->getGlobalMetaState();
+
+    bool motionAxisChanged = false;
+    if (fields & Accumulator::FIELD_ABS_X) {
+        if (mAxes.x.updateValue(mAccumulator.absX)) {
+            motionAxisChanged = true;
+        }
+    }
+
+    if (fields & Accumulator::FIELD_ABS_Y) {
+        if (mAxes.y.updateValue(mAccumulator.absY)) {
+            motionAxisChanged = true;
+        }
+    }
+
+    if (motionAxisChanged) {
+        PointerCoords pointerCoords;
+        pointerCoords.x = mAxes.x.value;
+        pointerCoords.y = mAxes.y.value;
+        pointerCoords.touchMajor = 0;
+        pointerCoords.touchMinor = 0;
+        pointerCoords.toolMajor = 0;
+        pointerCoords.toolMinor = 0;
+        pointerCoords.pressure = 0;
+        pointerCoords.size = 0;
+        pointerCoords.orientation = 0;
+
+        int32_t pointerId = 0;
+        getDispatcher()->notifyMotion(when, getDeviceId(), AINPUT_SOURCE_JOYSTICK, 0,
+                AMOTION_EVENT_ACTION_MOVE, 0, metaState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                1, &pointerId, &pointerCoords, mAxes.x.precision, mAxes.y.precision, 0);
+    }
+
+    if (fields & Accumulator::FIELD_ABS_HAT0X) {
+        if (mAxes.hat0X.updateValueAndDirection(mAccumulator.absHat0X)) {
+            notifyDirectionalAxis(mAxes.hat0X, when, metaState,
+                    AKEYCODE_DPAD_LEFT, AKEYCODE_DPAD_RIGHT);
+        }
+    }
+
+    if (fields & Accumulator::FIELD_ABS_HAT0Y) {
+        if (mAxes.hat0Y.updateValueAndDirection(mAccumulator.absHat0Y)) {
+            notifyDirectionalAxis(mAxes.hat0Y, when, metaState,
+                    AKEYCODE_DPAD_UP, AKEYCODE_DPAD_DOWN);
+        }
+    }
+
+    mAccumulator.clear();
+}
+
+void JoystickInputMapper::notifyDirectionalAxis(DirectionalAxis& axis,
+        nsecs_t when, int32_t metaState, int32_t lowKeyCode, int32_t highKeyCode) {
+    if (axis.lastKeyCode) {
+        getDispatcher()->notifyKey(when, getDeviceId(), AINPUT_SOURCE_JOYSTICK, 0,
+                AKEY_EVENT_ACTION_UP, AKEY_EVENT_FLAG_FROM_SYSTEM,
+                axis.lastKeyCode, 0, metaState, when);
+        axis.lastKeyCode = 0;
+    }
+    if (axis.direction) {
+        axis.lastKeyCode = axis.direction > 0 ? highKeyCode : lowKeyCode;
+        getDispatcher()->notifyKey(when, getDeviceId(), AINPUT_SOURCE_JOYSTICK, 0,
+                AKEY_EVENT_ACTION_DOWN, AKEY_EVENT_FLAG_FROM_SYSTEM,
+                axis.lastKeyCode, 0, metaState, when);
+    }
+}
+
+
 } // namespace android
diff --git a/services/input/InputReader.h b/services/input/InputReader.h
index 8b2d40a096d2..613ed18bdc24 100644
--- a/services/input/InputReader.h
+++ b/services/input/InputReader.h
@@ -339,6 +339,9 @@ public:
 protected:
     InputDevice* mDevice;
     InputReaderContext* mContext;
+
+    static void dumpRawAbsoluteAxisInfo(String8& dump,
+            const RawAbsoluteAxisInfo& axis, const char* name);
 };
 
 
@@ -951,6 +954,139 @@ private:
     void sync(nsecs_t when);
 };
 
+
+class JoystickInputMapper : public InputMapper {
+public:
+    JoystickInputMapper(InputDevice* device);
+    virtual ~JoystickInputMapper();
+
+    virtual uint32_t getSources();
+    virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo);
+    virtual void dump(String8& dump);
+    virtual void configure();
+    virtual void reset();
+    virtual void process(const RawEvent* rawEvent);
+
+private:
+    struct RawAxes {
+        RawAbsoluteAxisInfo x;
+        RawAbsoluteAxisInfo y;
+        RawAbsoluteAxisInfo hat0X;
+        RawAbsoluteAxisInfo hat0Y;
+    } mRawAxes;
+
+    struct NormalizedAxis {
+        bool valid;
+
+        static const float min = -1.0f;
+        static const float max = -1.0f;
+
+        float scale;      // scale factor
+        float center;     // center offset after scaling
+        float precision;  // precision
+        float flat;       // size of flat region
+        float fuzz;       // error tolerance
+
+        float value;      // most recent value
+
+        NormalizedAxis() : valid(false), scale(0), center(0), precision(0),
+                flat(0), fuzz(0), value(0) {
+        }
+
+        void configure(const RawAbsoluteAxisInfo& rawAxis) {
+            if (rawAxis.valid && rawAxis.getRange() != 0) {
+                valid = true;
+                scale = 2.0f / rawAxis.getRange();
+                precision = rawAxis.getRange();
+                flat = rawAxis.flat * scale;
+                fuzz = rawAxis.fuzz * scale;
+                center = float(rawAxis.minValue + rawAxis.maxValue) / rawAxis.getRange();
+            }
+        }
+
+        void resetState() {
+            value = 0;
+        }
+
+        bool updateValue(int32_t rawValue) {
+            float newValue = rawValue * scale - center;
+            if (value == newValue) {
+                return false;
+            }
+            value = newValue;
+            return true;
+        }
+    };
+
+    struct DirectionalAxis : NormalizedAxis {
+        int32_t direction; // most recent direction vector: value is one of -1, 0, 1.
+
+        int32_t lastKeyCode;  // most recent key code produced
+
+        DirectionalAxis() : lastKeyCode(0) {
+        }
+
+        void resetState() {
+            NormalizedAxis::resetState();
+            direction = 0;
+            lastKeyCode = 0;
+        }
+
+        bool updateValueAndDirection(int32_t rawValue) {
+            if (!updateValue(rawValue)) {
+                return false;
+            }
+            if (value > flat) {
+                direction = 1;
+            } else if (value < -flat) {
+                direction = -1;
+            } else {
+                direction = 0;
+            }
+            return true;
+        }
+    };
+
+    struct Axes {
+        NormalizedAxis x;
+        NormalizedAxis y;
+        DirectionalAxis hat0X;
+        DirectionalAxis hat0Y;
+    } mAxes;
+
+    struct Accumulator {
+        enum {
+            FIELD_ABS_X = 1,
+            FIELD_ABS_Y = 2,
+            FIELD_ABS_HAT0X = 4,
+            FIELD_ABS_HAT0Y = 8,
+
+            FIELD_ALL = FIELD_ABS_X | FIELD_ABS_Y | FIELD_ABS_HAT0X | FIELD_ABS_HAT0Y,
+        };
+
+        uint32_t fields;
+
+        int32_t absX;
+        int32_t absY;
+        int32_t absHat0X;
+        int32_t absHat0Y;
+
+        inline void clear() {
+            fields = 0;
+        }
+    } mAccumulator;
+
+    void initialize();
+
+    void sync(nsecs_t when);
+
+    void notifyDirectionalAxis(DirectionalAxis& axis,
+            nsecs_t when, int32_t metaState, int32_t lowKeyCode, int32_t highKeyCode);
+
+    static void dumpNormalizedAxis(String8& dump,
+            const NormalizedAxis& axis, const char* name);
+};
+
 } // namespace android
 
 #endif // _UI_INPUT_READER_H