Accessibility feature - framework changes (replacing 698, 699, 700, 701 and merging with the latest Donut)

11 files changed, 1279 insertions, 25 deletions

diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index 16b70ed..1564fd0 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -16,6 +16,9 @@
 
 package android.view;
 
+import com.android.internal.R;
+import com.android.internal.view.menu.MenuBuilder;
+
 import android.content.Context;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
@@ -25,12 +28,12 @@ import android.graphics.LinearGradient;
 import android.graphics.Matrix;
 import android.graphics.Paint;
 import android.graphics.PixelFormat;
+import android.graphics.Point;
 import android.graphics.PorterDuff;
 import android.graphics.PorterDuffXfermode;
 import android.graphics.Rect;
 import android.graphics.Region;
 import android.graphics.Shader;
-import android.graphics.Point;
 import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
 import android.os.Handler;
@@ -42,30 +45,30 @@ import android.os.RemoteException;
 import android.os.SystemClock;
 import android.os.SystemProperties;
 import android.util.AttributeSet;
+import android.util.Config;
 import android.util.EventLog;
 import android.util.Log;
-import android.util.SparseArray;
-import android.util.Poolable;
 import android.util.Pool;
-import android.util.Pools;
+import android.util.Poolable;
 import android.util.PoolableManager;
-import android.util.Config;
+import android.util.Pools;
+import android.util.SparseArray;
 import android.view.ContextMenu.ContextMenuInfo;
+import android.view.accessibility.AccessibilityEvent;
+import android.view.accessibility.AccessibilityEventSource;
+import android.view.accessibility.AccessibilityManager;
 import android.view.animation.Animation;
+import android.view.inputmethod.EditorInfo;
 import android.view.inputmethod.InputConnection;
 import android.view.inputmethod.InputMethodManager;
-import android.view.inputmethod.EditorInfo;
 import android.widget.ScrollBarDrawable;
 
-import com.android.internal.R;
-import com.android.internal.view.menu.MenuBuilder;
-
+import java.lang.ref.SoftReference;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.WeakHashMap;
-import java.lang.ref.SoftReference;
-import java.lang.reflect.Method;
-import java.lang.reflect.InvocationTargetException;
 
 /**
  * <p>
@@ -553,7 +556,7 @@ import java.lang.reflect.InvocationTargetException;
  *
  * @see android.view.ViewGroup
  */
-public class View implements Drawable.Callback, KeyEvent.Callback {
+public class View implements Drawable.Callback, KeyEvent.Callback, AccessibilityEventSource {
     private static final boolean DBG = false;
 
     /**
@@ -851,6 +854,18 @@ public class View implements Drawable.Callback, KeyEvent.Callback {
     public static final int HAPTIC_FEEDBACK_ENABLED = 0x10000000;
 
     /**
+     * View flag indicating whether {@link #addFocusables(ArrayList, int, int)}
+     * should add all focusable Views regardless if they are focusable in touch mode.
+     */
+    public static final int FOCUSABLES_ALL = 0x00000000;
+
+    /**
+     * View flag indicating whether {@link #addFocusables(ArrayList, int, int)}
+     * should add only Views focusable in touch mode.
+     */
+    public static final int FOCUSABLES_TOUCH_MODE = 0x00000001;
+
+    /**
      * Use with {@link #focusSearch}. Move focus to the previous selectable
      * item.
      */
@@ -1551,6 +1566,11 @@ public class View implements Drawable.Callback, KeyEvent.Callback {
     protected int mPaddingBottom;
 
     /**
+     * Briefly describes the view and is primarily used for accessibility support.
+     */
+    private CharSequence mContentDescription;
+
+    /**
      * Cache the paddingRight set by the user to append to the scrollbar's size.
      */
     @ViewDebug.ExportedProperty
@@ -1858,6 +1878,9 @@ public class View implements Drawable.Callback, KeyEvent.Callback {
                         viewFlagMasks |= DRAWING_CACHE_QUALITY_MASK;
                     }
                     break;
+                case com.android.internal.R.styleable.View_contentDescription:
+                    mContentDescription = a.getString(attr);
+                    break;
                 case com.android.internal.R.styleable.View_soundEffectsEnabled:
                     if (!a.getBoolean(attr, true)) {
                         viewFlagValues &= ~SOUND_EFFECTS_ENABLED;
@@ -2255,6 +2278,8 @@ public class View implements Drawable.Callback, KeyEvent.Callback {
      *         otherwise is returned.
      */
     public boolean performClick() {
+        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED);
+
         if (mOnClickListener != null) {
             playSoundEffect(SoundEffectConstants.CLICK);
             mOnClickListener.onClick(this);
@@ -2272,6 +2297,8 @@ public class View implements Drawable.Callback, KeyEvent.Callback {
      *         otherwise is returned.
      */
     public boolean performLongClick() {
+        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_LONG_CLICKED);
+
         boolean handled = false;
         if (mOnLongClickListener != null) {
             handled = mOnLongClickListener.onLongClick(View.this);
@@ -2492,6 +2519,10 @@ public class View implements Drawable.Callback, KeyEvent.Callback {
      *        from (in addition to direction).  Will be <code>null</code> otherwise.
      */
     protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
+        if (gainFocus) {
+            sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED);
+        }
+
         InputMethodManager imm = InputMethodManager.peekInstance();
         if (!gainFocus) {
             if (isPressed()) {
@@ -2514,6 +2545,79 @@ public class View implements Drawable.Callback, KeyEvent.Callback {
     }
 
     /**
+     * {@inheritDoc}
+     */
+    public void sendAccessibilityEvent(int eventType) {
+        if (AccessibilityManager.getInstance(mContext).isEnabled()) {
+            sendAccessibilityEventUnchecked(AccessibilityEvent.obtain(eventType));
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public void sendAccessibilityEventUnchecked(AccessibilityEvent event) {
+        event.setClassName(getClass().getName());
+        event.setPackageName(getContext().getPackageName());
+        event.setEnabled(isEnabled());
+        event.setContentDescription(mContentDescription);
+
+        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_FOCUSED && mAttachInfo != null) {
+            ArrayList<View> focusablesTempList = mAttachInfo.mFocusablesTempList;
+            getRootView().addFocusables(focusablesTempList, View.FOCUS_FORWARD, FOCUSABLES_ALL);
+            event.setItemCount(focusablesTempList.size());
+            event.setCurrentItemIndex(focusablesTempList.indexOf(this));
+            focusablesTempList.clear();
+        }
+
+        dispatchPopulateAccessibilityEvent(event);
+
+        AccessibilityManager.getInstance(mContext).sendAccessibilityEvent(event);
+    }
+
+    /**
+     * Dispatches an {@link AccessibilityEvent} to the {@link View} children
+     * to be populated.
+     *
+     * @param event The event.
+     *
+     * @return True if the event population was completed.
+     */
+    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
+        return false;
+    }
+
+    /**
+     * Gets the {@link View} description. It briefly describes the view and is
+     * primarily used for accessibility support. Set this property to enable
+     * better accessibility support for your application. This is especially
+     * true for views that do not have textual representation (For example,
+     * ImageButton).
+     *
+     * @return The content descriptiopn.
+     *
+     * @attr ref android.R.styleable#View_contentDescription
+     */
+    public CharSequence getContentDescription() {
+        return mContentDescription;
+    }
+
+    /**
+     * Sets the {@link View} description. It briefly describes the view and is
+     * primarily used for accessibility support. Set this property to enable
+     * better accessibility support for your application. This is especially
+     * true for views that do not have textual representation (For example,
+     * ImageButton).
+     *
+     * @param contentDescription The content description.
+     *
+     * @attr ref android.R.styleable#View_contentDescription
+     */
+    public void setContentDescription(CharSequence contentDescription) {
+        mContentDescription = contentDescription;
+    }
+
+    /**
      * Invoked whenever this view loses focus, either by losing window focus or by losing
      * focus within its window. This method can be used to clear any state tied to the
      * focus. For instance, if a button is held pressed with the trackball and the window
@@ -3222,11 +3326,37 @@ public class View implements Drawable.Callback, KeyEvent.Callback {
      * @param direction The direction of the focus
      */
     public void addFocusables(ArrayList<View> views, int direction) {
-        if (!isFocusable()) return;
+        addFocusables(views, direction, FOCUSABLES_TOUCH_MODE);
+    }
 
-        if (isInTouchMode() && !isFocusableInTouchMode()) return;
+    /**
+     * Adds any focusable views that are descendants of this view (possibly
+     * including this view if it is focusable itself) to views. This method
+     * adds all focusable views regardless if we are in touch mode or
+     * only views focusable in touch mode if we are in touch mode depending on
+     * the focusable mode paramater.
+     *
+     * @param views Focusable views found so far or null if all we are interested is
+     *        the number of focusables.
+     * @param direction The direction of the focus.
+     * @param focusableMode The type of focusables to be added.
+     *
+     * @see #FOCUSABLES_ALL
+     * @see #FOCUSABLES_TOUCH_MODE
+     */
+    public void addFocusables(ArrayList<View> views, int direction, int focusableMode) {
+        if (!isFocusable()) {
+            return;
+        }
 
-        views.add(this);
+        if ((focusableMode & FOCUSABLES_TOUCH_MODE) == FOCUSABLES_TOUCH_MODE &&
+                isInTouchMode() && !isFocusableInTouchMode()) {
+            return;
+        }
+
+        if (views != null) {
+            views.add(this);
+        }
     }
 
     /**
@@ -8378,7 +8508,12 @@ public class View implements Drawable.Callback, KeyEvent.Callback {
          * calling up the hierarchy.
          */
         final Rect mTmpInvalRect = new Rect();
-        
+
+        /**
+         * Temporary list for use in collecting focusable descendents of a view.
+         */
+        final ArrayList<View> mFocusablesTempList = new ArrayList<View>(24);
+
         /**
          * Creates a new set of attachment information with the specified
          * events handler and thread.
diff --git a/core/java/android/view/ViewGroup.java b/core/java/android/view/ViewGroup.java
index db5177f..bf04dcd 100644
--- a/core/java/android/view/ViewGroup.java
+++ b/core/java/android/view/ViewGroup.java
@@ -24,15 +24,16 @@ import android.graphics.Bitmap;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Rect;
-import android.graphics.Region;
 import android.graphics.RectF;
+import android.graphics.Region;
 import android.os.Parcelable;
 import android.os.SystemClock;
 import android.util.AttributeSet;
+import android.util.Config;
 import android.util.EventLog;
 import android.util.Log;
 import android.util.SparseArray;
-import android.util.Config;
+import android.view.accessibility.AccessibilityEvent;
 import android.view.animation.Animation;
 import android.view.animation.AnimationUtils;
 import android.view.animation.LayoutAnimationController;
@@ -601,6 +602,14 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
      */
     @Override
     public void addFocusables(ArrayList<View> views, int direction) {
+        addFocusables(views, direction, FOCUSABLES_TOUCH_MODE);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public void addFocusables(ArrayList<View> views, int direction, int focusableMode) {
         final int focusableCount = views.size();
 
         final int descendantFocusability = getDescendantFocusability();
@@ -612,7 +621,7 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
             for (int i = 0; i < count; i++) {
                 final View child = children[i];
                 if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) {
-                    child.addFocusables(views, direction);
+                    child.addFocusables(views, direction, focusableMode);
                 }
             }
         }
@@ -625,7 +634,7 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
             descendantFocusability != FOCUS_AFTER_DESCENDANTS ||
                 // No focusable descendants
                 (focusableCount == views.size())) {
-            super.addFocusables(views, direction);
+            super.addFocusables(views, direction, focusableMode);
         }
     }
 
@@ -1020,6 +1029,15 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
         }
     }
 
+    @Override
+    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
+        boolean populated = false;
+        for (int i = 0, count = getChildCount(); i < count; i++) {
+            populated |= getChildAt(i).dispatchPopulateAccessibilityEvent(event);
+        }
+        return populated;
+    }
+
     /**
      * {@inheritDoc}
      */
diff --git a/core/java/android/view/ViewRoot.java b/core/java/android/view/ViewRoot.java
index dbfb194..7cd65e2 100644
--- a/core/java/android/view/ViewRoot.java
+++ b/core/java/android/view/ViewRoot.java
@@ -34,6 +34,8 @@ import android.util.Log;
 import android.util.EventLog;
 import android.util.SparseArray;
 import android.view.View.MeasureSpec;
+import android.view.accessibility.AccessibilityEvent;
+import android.view.accessibility.AccessibilityManager;
 import android.view.inputmethod.InputConnection;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.Scroller;
@@ -640,6 +642,7 @@ public final class ViewRoot extends Handler implements ViewParent,
             host.dispatchAttachedToWindow(attachInfo, 0);
             getRunQueue().executeActions(attachInfo.mHandler);
             //Log.i(TAG, "Screen on initialized: " + attachInfo.mKeepScreenOn);
+
         } else {
             desiredWindowWidth = mWinFrame.width();
             desiredWindowHeight = mWinFrame.height();
@@ -1723,7 +1726,7 @@ public final class ViewRoot extends Handler implements ViewParent,
                     }
                     mView.dispatchWindowFocusChanged(hasWindowFocus);
                 }
-                
+
                 // Note: must be done after the focus change callbacks,
                 // so all of the view state is set up correctly.
                 if (hasWindowFocus) {
@@ -1741,6 +1744,10 @@ public final class ViewRoot extends Handler implements ViewParent,
                                 ~WindowManager.LayoutParams.SOFT_INPUT_IS_FORWARD_NAVIGATION;
                     mHasHadWindowFocus = true;
                 }
+
+                if (hasWindowFocus && mView != null) {
+                    sendAccessibilityEvents();
+                }
             }
         } break;
         case DIE:
@@ -2526,6 +2533,21 @@ public final class ViewRoot extends Handler implements ViewParent,
         sendMessage(msg);
     }
 
+    /**
+     * The window is getting focus so if there is anything focused/selected
+     * send an {@link AccessibilityEvent} to announce that.
+     */
+    private void sendAccessibilityEvents() {
+        if (!AccessibilityManager.getInstance(mView.getContext()).isEnabled()) {
+            return;
+        }
+        mView.sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
+        View focusedView = mView.findFocus();
+        if (focusedView != null && focusedView != mView) {
+            focusedView.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED);
+        }
+    }
+
     public boolean showContextMenuForChild(View originalView) {
         return false;
     }
diff --git a/core/java/android/view/Window.java b/core/java/android/view/Window.java
index 428de67..b0e738c 100644
--- a/core/java/android/view/Window.java
+++ b/core/java/android/view/Window.java
@@ -24,7 +24,7 @@ import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.IBinder;
-import android.util.Log;
+import android.view.accessibility.AccessibilityEvent;
 
 /**
  * Abstract base class for a top-level window look and behavior policy.  An
@@ -153,7 +153,16 @@ public abstract class Window {
          * @return boolean Return true if this event was consumed.
          */
         public boolean dispatchTrackballEvent(MotionEvent event);
-        
+
+        /**
+         * Called to process population of {@link AccessibilityEvent}s.
+         *
+         * @param event The event.
+         *
+         * @return boolean Return true if event population was completed.
+         */
+        public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event);
+
         /**
          * Instantiate the view to display in the panel for 'featureId'.
          * You can return null, in which case the default content (typically
diff --git a/core/java/android/view/WindowManagerImpl.java b/core/java/android/view/WindowManagerImpl.java
index 755d7b8..0973599 100644
--- a/core/java/android/view/WindowManagerImpl.java
+++ b/core/java/android/view/WindowManagerImpl.java
@@ -173,7 +173,6 @@ public class WindowManagerImpl implements WindowManager {
             mRoots[index] = root;
             mParams[index] = wparams;
         }
-
         // do this last because it fires off messages to start doing things
         root.setView(view, wparams, panelParentView);
     }
diff --git a/core/java/android/view/accessibility/AccessibilityEvent.aidl b/core/java/android/view/accessibility/AccessibilityEvent.aidl
new file mode 100644
index 0000000..cee3604
--- /dev/null
+++ b/core/java/android/view/accessibility/AccessibilityEvent.aidl
@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2009, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view.accessibility;
+
+parcelable AccessibilityEvent;
diff --git a/core/java/android/view/accessibility/AccessibilityEvent.java b/core/java/android/view/accessibility/AccessibilityEvent.java
new file mode 100644
index 0000000..c22f991
--- /dev/null
+++ b/core/java/android/view/accessibility/AccessibilityEvent.java
@@ -0,0 +1,734 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view.accessibility;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.text.TextUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * This class represents accessibility events that are sent by the system when
+ * something notable happens in the user interface. For example, when a
+ * {@link android.widget.Button} is clicked, a {@link android.view.View} is focused, etc.
+ * <p>
+ * This class represents various semantically different accessibility event
+ * types. Each event type has associated a set of related properties. In other
+ * words, each event type is characterized via a subset of the properties exposed
+ * by this class. For each event type there is a corresponding constant defined
+ * in this class. Since some event types are semantically close there are mask
+ * constants that group them together. Follows a specification of the event
+ * types and their associated properties:
+ * <p>
+ * <b>VIEW TYPES</b> <br>
+ * <p>
+ * <b>View clicked</b> - represents the event of clicking on a {@link android.view.View}
+ * like {@link android.widget.Button}, {@link android.widget.CompoundButton}, etc. <br>
+ * Type:{@link #TYPE_VIEW_CLICKED} <br>
+ * Properties:
+ * {@link #getClassName()},
+ * {@link #getPackageName()},
+ * {@link #getEventTime()},
+ * {@link #getText()},
+ * {@link #isChecked()},
+ * {@link #isEnabled()},
+ * {@link #isPassword()},
+ * {@link #getItemCount()},
+ * {@link #getCurrentItemIndex()}
+ * <p>
+ * <b>View long clicked</b> - represents the event of long clicking on a {@link android.view.View}
+ * like {@link android.widget.Button}, {@link android.widget.CompoundButton}, etc. <br>
+ * Type:{@link #TYPE_VIEW_LONG_CLICKED} <br>
+ * Properties:
+ * {@link #getClassName()},
+ * {@link #getPackageName()},
+ * {@link #getEventTime()},
+ * {@link #getText()},
+ * {@link #isChecked()},
+ * {@link #isEnabled()},
+ * {@link #isPassword()},
+ * {@link #getItemCount()},
+ * {@link #getCurrentItemIndex()}
+ * <p>
+ * <b>View selected</b> - represents the event of selecting an item usually in
+ * the context of an {@link android.widget.AdapterView}. <br>
+ * Type: {@link #TYPE_VIEW_SELECTED} <br>
+ * Properties:
+ * {@link #getClassName()},
+ * {@link #getPackageName()},
+ * {@link #getEventTime()},
+ * {@link #getText()},
+ * {@link #isChecked()},
+ * {@link #isEnabled()},
+ * {@link #isPassword()},
+ * {@link #getItemCount()},
+ * {@link #getCurrentItemIndex()}
+ * <p>
+ * <b>View focused</b> - represents the event of focusing a
+ * {@link android.view.View}. <br>
+ * Type: {@link #TYPE_VIEW_FOCUSED} <br>
+ * Properties:
+ * {@link #getClassName()},
+ * {@link #getPackageName()},
+ * {@link #getEventTime()},
+ * {@link #getText()},
+ * {@link #isChecked()},
+ * {@link #isEnabled()},
+ * {@link #isPassword()},
+ * {@link #getItemCount()},
+ * {@link #getCurrentItemIndex()}
+ * <p>
+ * <b>View text changed</b> - represents the event of changing the text of an
+ * {@link android.widget.EditText}. <br>
+ * Type: {@link #TYPE_VIEW_TEXT_CHANGED} <br>
+ * Properties:
+ * {@link #getClassName()},
+ * {@link #getPackageName()},
+ * {@link #getEventTime()},
+ * {@link #getText()},
+ * {@link #isChecked()},
+ * {@link #isEnabled()},
+ * {@link #isPassword()},
+ * {@link #getItemCount()},
+ * {@link #getCurrentItemIndex()},
+ * {@link #getFromIndex()},
+ * {@link #getAddedCount()},
+ * {@link #getRemovedCount()},
+ * {@link #getBeforeText()}
+ * <p>
+ * <b>TRANSITION TYPES</b> <br>
+ * <p>
+ * <b>Window state changed</b> - represents the event of opening/closing a
+ * {@link android.widget.PopupWindow}, {@link android.view.Menu},
+ * {@link android.app.Dialog}, etc. <br>
+ * Type: {@link #TYPE_WINDOW_STATE_CHANGED} <br>
+ * Properties:
+ * {@link #getClassName()},
+ * {@link #getPackageName()},
+ * {@link #getEventTime()},
+ * {@link #getText()}
+ * <p>
+ * <b>NOTIFICATION TYPES</b> <br>
+ * <p>
+ * <b>Notification state changed</b> - represents the event showing/hiding
+ * {@link android.app.Notification}.
+ * Type: {@link #TYPE_NOTIFICATION_STATE_CHANGED} <br>
+ * Properties:
+ * {@link #getClassName()},
+ * {@link #getPackageName()},
+ * {@link #getEventTime()},
+ * {@link #getText()}
+ * {@link #getParcelableData()}
+ * <p>
+ * <b>Security note</b>
+ * <p>
+ * Since an event contains the text of its source privacy can be compromised by leaking of
+ * sensitive information such as passwords. To address this issue any event fired in response
+ * to manipulation of a PASSWORD field does NOT CONTAIN the text of the password.
+ *
+ * @see android.view.accessibility.AccessibilityManager
+ * @see android.accessibilityservice.AccessibilityService
+ */
+public final class AccessibilityEvent implements Parcelable {
+
+    /**
+     * Invalid selection/focus position.
+     *
+     * @see #getCurrentItemIndex()
+     */
+    public static final int INVALID_POSITION = -1;
+
+    /**
+     * Maximum length of the text fields.
+     *
+     * @see #getBeforeText()
+     * @see #getText()
+     */
+    public static final int MAX_TEXT_LENGTH = 500;
+
+    /**
+     * Represents the event of clicking on a {@link android.view.View} like
+     * {@link android.widget.Button}, {@link android.widget.CompoundButton}, etc.
+     */
+    public static final int TYPE_VIEW_CLICKED = 0x00000001;
+
+    /**
+     * Represents the event of long clicking on a {@link android.view.View} like
+     * {@link android.widget.Button}, {@link android.widget.CompoundButton}, etc.
+     */
+    public static final int TYPE_VIEW_LONG_CLICKED = 0x00000002;
+
+    /**
+     * Represents the event of selecting an item usually in the context of an
+     * {@link android.widget.AdapterView}.
+     */
+    public static final int TYPE_VIEW_SELECTED = 0x00000004;
+
+    /**
+     * Represents the event of focusing a {@link android.view.View}.
+     */
+    public static final int TYPE_VIEW_FOCUSED = 0x00000008;
+
+    /**
+     * Represents the event of changing the text of an {@link android.widget.EditText}.
+     */
+    public static final int TYPE_VIEW_TEXT_CHANGED = 0x00000010;
+
+    /**
+     * Represents the event of opening/closing a {@link android.widget.PopupWindow},
+     * {@link android.view.Menu}, {@link android.app.Dialog}, etc.
+     */
+    public static final int TYPE_WINDOW_STATE_CHANGED = 0x00000020;
+
+    /**
+     * Represents the event showing/hiding a {@link android.app.Notification}.
+     */
+    public static final int TYPE_NOTIFICATION_STATE_CHANGED = 0x00000040;
+
+    /**
+     * Mask for {@link AccessibilityEvent} all types.
+     *
+     * @see #TYPE_VIEW_CLICKED
+     * @see #TYPE_VIEW_LONG_CLICKED
+     * @see #TYPE_VIEW_SELECTED
+     * @see #TYPE_VIEW_FOCUSED
+     * @see #TYPE_VIEW_TEXT_CHANGED
+     * @see #TYPE_WINDOW_STATE_CHANGED
+     * @see #TYPE_NOTIFICATION_STATE_CHANGED
+     */
+    public static final int TYPES_ALL_MASK = 0xFFFFFFFF;
+
+    private static final int MAX_POOL_SIZE = 2;
+    private static final Object mPoolLock = new Object();
+    private static AccessibilityEvent sPool;
+    private static int sPoolSize;
+
+    private static final int CHECKED = 0x00000001;
+    private static final int ENABLED = 0x00000002;
+    private static final int PASSWORD = 0x00000004;
+    private static final int FULL_SCREEN = 0x00000080;
+
+    private AccessibilityEvent mNext;
+
+    private int mEventType;
+    private int mBooleanProperties;
+    private int mCurrentItemIndex;
+    private int mItemCount;
+    private int mFromIndex;
+    private int mAddedCount;
+    private int mRemovedCount;
+
+    private long mEventTime;
+
+    private CharSequence mClassName;
+    private CharSequence mPackageName;
+    private CharSequence mContentDescription;
+    private CharSequence mBeforeText;
+
+    private Parcelable mParcelableData;
+
+    private final List<CharSequence> mText = new ArrayList<CharSequence>();
+
+    private boolean mIsInPool;
+
+    /*
+     * Hide constructor from clients.
+     */
+    private AccessibilityEvent() {
+        mCurrentItemIndex = INVALID_POSITION;
+    }
+
+    /**
+     * Gets if the source is checked.
+     *
+     * @return True if the view is checked, false otherwise.
+     */
+    public boolean isChecked() {
+        return getBooleanProperty(CHECKED);
+    }
+
+    /**
+     * Sets if the source is checked.
+     *
+     * @param isChecked True if the view is checked, false otherwise.
+     */
+    public void setChecked(boolean isChecked) {
+        setBooleanProperty(CHECKED, isChecked);
+    }
+
+    /**
+     * Gets if the source is enabled.
+     *
+     * @return True if the view is enabled, false otherwise.
+     */
+    public boolean isEnabled() {
+        return getBooleanProperty(ENABLED);
+    }
+
+    /**
+     * Sets if the source is enabled.
+     *
+     * @param isEnabled True if the view is enabled, false otherwise.
+     */
+    public void setEnabled(boolean isEnabled) {
+        setBooleanProperty(ENABLED, isEnabled);
+    }
+
+    /**
+     * Gets if the source is a password field.
+     *
+     * @return True if the view is a password field, false otherwise.
+     */
+    public boolean isPassword() {
+        return getBooleanProperty(PASSWORD);
+    }
+
+    /**
+     * Sets if the source is a password field.
+     *
+     * @param isPassword True if the view is a password field, false otherwise.
+     */
+    public void setPassword(boolean isPassword) {
+        setBooleanProperty(PASSWORD, isPassword);
+    }
+
+    /**
+     * Sets if the source is taking the entire screen.
+     *
+     * @param isFullScreen True if the source is full screen, false otherwise.
+     */
+    public void setFullScreen(boolean isFullScreen) {
+        setBooleanProperty(FULL_SCREEN, isFullScreen);
+    }
+
+    /**
+     * Gets if the source is taking the entire screen.
+     *
+     * @return True if the source is full screen, false otherwise.
+     */
+    public boolean isFullScreen() {
+        return getBooleanProperty(FULL_SCREEN);
+    }
+
+    /**
+     * Gets the event type.
+     *
+     * @return The event type.
+     */
+    public int getEventType() {
+        return mEventType;
+    }
+
+    /**
+     * Sets the event type.
+     *
+     * @param eventType The event type.
+     */
+    public void setEventType(int eventType) {
+        mEventType = eventType;
+    }
+
+    /**
+     * Gets the number of items that can be visited.
+     *
+     * @return The number of items.
+     */
+    public int getItemCount() {
+        return mItemCount;
+    }
+
+    /**
+     * Sets the number of items that can be visited.
+     *
+     * @param itemCount The number of items.
+     */
+    public void setItemCount(int itemCount) {
+        mItemCount = itemCount;
+    }
+
+    /**
+     * Gets the index of the source in the list of items the can be visited.
+     *
+     * @return The current item index.
+     */
+    public int getCurrentItemIndex() {
+        return mCurrentItemIndex;
+    }
+
+    /**
+     * Sets the index of the source in the list of items that can be visited.
+     *
+     * @param currentItemIndex The current item index.
+     */
+    public void setCurrentItemIndex(int currentItemIndex) {
+        mCurrentItemIndex = currentItemIndex;
+    }
+
+    /**
+     * Gets the index of the first character of the changed sequence.
+     *
+     * @return The index of the first character.
+     */
+    public int getFromIndex() {
+        return mFromIndex;
+    }
+
+    /**
+     * Sets the index of the first character of the changed sequence.
+     *
+     * @param fromIndex The index of the first character.
+     */
+    public void setFromIndex(int fromIndex) {
+        mFromIndex = fromIndex;
+    }
+
+    /**
+     * Gets the number of added characters.
+     *
+     * @return The number of added characters.
+     */
+    public int getAddedCount() {
+        return mAddedCount;
+    }
+
+    /**
+     * Sets the number of added characters.
+     *
+     * @param addedCount The number of added characters.
+     */
+    public void setAddedCount(int addedCount) {
+        mAddedCount = addedCount;
+    }
+
+    /**
+     * Gets the number of removed characters.
+     *
+     * @return The number of removed characters.
+     */
+    public int getRemovedCount() {
+        return mRemovedCount;
+    }
+
+    /**
+     * Sets the number of removed characters.
+     *
+     * @param removedCount The number of removed characters.
+     */
+    public void setRemovedCount(int removedCount) {
+        mRemovedCount = removedCount;
+    }
+
+    /**
+     * Gets the time in which this event was sent.
+     *
+     * @return The event time.
+     */
+    public long getEventTime() {
+        return mEventTime;
+    }
+
+    /**
+     * Sets the time in which this event was sent.
+     *
+     * @param eventTime The event time.
+     */
+    public void setEventTime(long eventTime) {
+        mEventTime = eventTime;
+    }
+
+    /**
+     * Gets the class name of the source.
+     *
+     * @return The class name.
+     */
+    public CharSequence getClassName() {
+        return mClassName;
+    }
+
+    /**
+     * Sets the class name of the source.
+     *
+     * @param className The lass name.
+     */
+    public void setClassName(CharSequence className) {
+        mClassName = className;
+    }
+
+    /**
+     * Gets the package name of the source.
+     *
+     * @return The package name.
+     */
+    public CharSequence getPackageName() {
+        return mPackageName;
+    }
+
+    /**
+     * Sets the package name of the source.
+     *
+     * @param packageName The package name.
+     */
+    public void setPackageName(CharSequence packageName) {
+        mPackageName = packageName;
+    }
+
+    /**
+     * Gets the text of the event. The index in the list represents the priority
+     * of the text. Specifically, the lower the index the higher the priority.
+     *
+     * @return The text.
+     */
+    public List<CharSequence> getText() {
+        return mText;
+    }
+
+    /**
+     * Sets the text before a change.
+     *
+     * @return The text before the change.
+     */
+    public CharSequence getBeforeText() {
+        return mBeforeText;
+    }
+
+    /**
+     * Sets the text before a change.
+     *
+     * @param beforeText The text before the change.
+     */
+    public void setBeforeText(CharSequence beforeText) {
+        mBeforeText = beforeText;
+    }
+
+    /**
+     * Gets the description of the source.
+     *
+     * @return The description.
+     */
+    public CharSequence getContentDescription() {
+        return mContentDescription;
+    }
+
+    /**
+     * Sets the description of the source.
+     *
+     * @param contentDescription The description.
+     */
+    public void setContentDescription(CharSequence contentDescription) {
+        mContentDescription = contentDescription;
+    }
+
+    /**
+     * Gets the {@link Parcelable} data.
+     *
+     * @return The parcelable data.
+     */
+    public Parcelable getParcelableData() {
+        return mParcelableData;
+    }
+
+    /**
+     * Sets the {@link Parcelable} data of the event.
+     *
+     * @param parcelableData The parcelable data.
+     */
+    public void setParcelableData(Parcelable parcelableData) {
+        mParcelableData = parcelableData;
+    }
+
+    /**
+     * Returns a cached instance if such is available or a new one is
+     * instantiated with type property set.
+     *
+     * @param eventType The event type.
+     * @return An instance.
+     */
+    public static AccessibilityEvent obtain(int eventType) {
+        AccessibilityEvent event = AccessibilityEvent.obtain();
+        event.setEventType(eventType);
+        return event;
+    }
+
+    /**
+     * Returns a cached instance if such is available or a new one is
+     * instantiated.
+     *
+     * @return An instance.
+     */
+    public static AccessibilityEvent obtain() {
+        synchronized (mPoolLock) {
+            if (sPool != null) {
+                AccessibilityEvent event = sPool;
+                sPool = sPool.mNext;
+                sPoolSize--;
+                event.mNext = null;
+                event.mIsInPool = false;
+                return event;
+            }
+            return new AccessibilityEvent();
+        }
+    }
+
+    /**
+     * Return an instance back to be reused.
+     * <p>
+     * <b>Note: You must not touch the object after calling this function.</b>
+     */
+    public void recycle() {
+        if (mIsInPool) {
+            return;
+        }
+
+        clear();
+        synchronized (mPoolLock) {
+            if (sPoolSize <= MAX_POOL_SIZE) {
+                mNext = sPool;
+                sPool = this;
+                mIsInPool = true;
+                sPoolSize++;
+            }
+        }
+    }
+
+    /**
+     * Clears the state of this instance.
+     */
+    private void clear() {
+        mEventType = 0;
+        mBooleanProperties = 0;
+        mCurrentItemIndex = INVALID_POSITION;
+        mItemCount = 0;
+        mFromIndex = 0;
+        mAddedCount = 0;
+        mRemovedCount = 0;
+        mEventTime = 0;
+        mClassName = null;
+        mPackageName = null;
+        mContentDescription = null;
+        mBeforeText = null;
+        mText.clear();
+    }
+
+    /**
+     * Gets the value of a boolean property.
+     *
+     * @param property The property.
+     * @return The value.
+     */
+    private boolean getBooleanProperty(int property) {
+        return (mBooleanProperties & property) == property;
+    }
+
+    /**
+     * Sets a boolean property.
+     *
+     * @param property The property.
+     * @param value The value.
+     */
+    private void setBooleanProperty(int property, boolean value) {
+        if (value) {
+            mBooleanProperties |= property;
+        } else {
+            mBooleanProperties &= ~property;
+        }
+    }
+
+    /**
+     * Creates a new instance from a {@link Parcel}.
+     *
+     * @param parcel A parcel containing the state of a {@link AccessibilityEvent}.
+     */
+    public void initFromParcel(Parcel parcel) {
+        mEventType = parcel.readInt();
+        mBooleanProperties = parcel.readInt();
+        mCurrentItemIndex = parcel.readInt();
+        mItemCount = parcel.readInt();
+        mFromIndex = parcel.readInt();
+        mAddedCount = parcel.readInt();
+        mRemovedCount = parcel.readInt();
+        mEventTime = parcel.readLong();
+        mClassName = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel);
+        mPackageName = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel);
+        mContentDescription = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel);
+        mBeforeText = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel);
+        mParcelableData = parcel.readParcelable(null);
+        parcel.readList(mText, null);
+    }
+
+    public void writeToParcel(Parcel parcel, int flags) {
+        parcel.writeInt(mEventType);
+        parcel.writeInt(mBooleanProperties);
+        parcel.writeInt(mCurrentItemIndex);
+        parcel.writeInt(mItemCount);
+        parcel.writeInt(mFromIndex);
+        parcel.writeInt(mAddedCount);
+        parcel.writeInt(mRemovedCount);
+        parcel.writeLong(mEventTime);
+        TextUtils.writeToParcel(mClassName, parcel, 0);
+        TextUtils.writeToParcel(mPackageName, parcel, 0);
+        TextUtils.writeToParcel(mContentDescription, parcel, 0);
+        TextUtils.writeToParcel(mBeforeText, parcel, 0);
+        parcel.writeParcelable(mParcelableData, flags);
+        parcel.writeList(mText);
+    }
+
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder builder = new StringBuilder();
+        builder.append(super.toString());
+        builder.append("; EventType: " + mEventType);
+        builder.append("; EventTime: " + mEventTime);
+        builder.append("; ClassName: " + mClassName);
+        builder.append("; PackageName: " + mPackageName);
+        builder.append("; Text: " + mText);
+        builder.append("; ContentDescription: " + mContentDescription);
+        builder.append("; ItemCount: " + mItemCount);
+        builder.append("; CurrentItemIndex: " + mCurrentItemIndex);
+        builder.append("; IsEnabled: " + isEnabled());
+        builder.append("; IsPassword: " + isPassword());
+        builder.append("; IsChecked: " + isChecked());
+        builder.append("; IsFullScreen: " + isFullScreen());
+        builder.append("; BeforeText: " + mBeforeText);
+        builder.append("; FromIndex: " + mFromIndex);
+        builder.append("; AddedCount: " + mAddedCount);
+        builder.append("; RemovedCount: " + mRemovedCount);
+        builder.append("; ParcelableData: " + mParcelableData);
+        return builder.toString();
+    }
+
+    /**
+     * @see Parcelable.Creator
+     */
+    public static final Parcelable.Creator<AccessibilityEvent> CREATOR =
+            new Parcelable.Creator<AccessibilityEvent>() {
+        public AccessibilityEvent createFromParcel(Parcel parcel) {
+            AccessibilityEvent event = AccessibilityEvent.obtain();
+            event.initFromParcel(parcel);
+            return event;
+        }
+
+        public AccessibilityEvent[] newArray(int size) {
+            return new AccessibilityEvent[size];
+        }
+    };
+}
diff --git a/core/java/android/view/accessibility/AccessibilityEventSource.java b/core/java/android/view/accessibility/AccessibilityEventSource.java
new file mode 100644
index 0000000..3d70959
--- /dev/null
+++ b/core/java/android/view/accessibility/AccessibilityEventSource.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view.accessibility;
+
+/**
+ * This interface is implemented by classes source of {@link AccessibilityEvent}s.
+ */
+public interface AccessibilityEventSource {
+
+    /**
+     * Handles the request for sending an {@link AccessibilityEvent} given
+     * the event type. The method must first check if accessibility is on
+     * via calling {@link AccessibilityManager#isEnabled()}, obtain
+     * an {@link AccessibilityEvent} from the event pool through calling
+     * {@link AccessibilityEvent#obtain(int)}, populate the event, and
+     * send it for dispatch via calling
+     * {@link AccessibilityManager#sendAccessibilityEvent(AccessibilityEvent)}.
+     *
+     * @see AccessibilityEvent
+     * @see AccessibilityManager
+     *
+     * @param eventType The event type.
+     */
+    public void sendAccessibilityEvent(int eventType);
+
+    /**
+     * Handles the request for sending an {@link AccessibilityEvent}. The
+     * method does not guarantee to check if accessibility is on before
+     * sending the event for dispatch. It is responsibility of the caller
+     * to do the check via calling {@link AccessibilityManager#isEnabled()}.
+     *
+     * @see AccessibilityEvent
+     * @see AccessibilityManager
+     *
+     * @param event The event.
+     */
+    public void sendAccessibilityEventUnchecked(AccessibilityEvent event);
+}
diff --git a/core/java/android/view/accessibility/AccessibilityManager.java b/core/java/android/view/accessibility/AccessibilityManager.java
new file mode 100644
index 0000000..0186270
--- /dev/null
+++ b/core/java/android/view/accessibility/AccessibilityManager.java
@@ -0,0 +1,198 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view.accessibility;
+
+import static android.util.Config.LOGV;
+
+import android.content.Context;
+import android.content.pm.ServiceInfo;
+import android.os.Binder;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.Looper;
+import android.os.Message;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.os.SystemClock;
+import android.util.Log;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * System level service that serves as an event dispatch for {@link AccessibilityEvent}s.
+ * Such events are generated when something notable happens in the user interface,
+ * for example an {@link android.app.Activity} starts, the focus or selection of a
+ * {@link android.view.View} changes etc. Parties interested in handling accessibility
+ * events implement and register an accessibility service which extends
+ * {@link android.accessibilityservice.AccessibilityService}.
+ *
+ * @see AccessibilityEvent
+ * @see android.accessibilityservice.AccessibilityService
+ * @see android.content.Context#getSystemService
+ */
+public final class AccessibilityManager {
+    private static final String LOG_TAG = "AccessibilityManager";
+
+    static final Object sInstanceSync = new Object();
+
+    private static AccessibilityManager sInstance;
+
+    private static final int DO_SET_ENABLED = 10;
+
+    final IAccessibilityManager mService;
+
+    final Handler mHandler;
+
+    boolean mIsEnabled;
+
+    final IAccessibilityManagerClient.Stub mClient = new IAccessibilityManagerClient.Stub() {
+        public void setEnabled(boolean enabled) {
+            mHandler.obtainMessage(DO_SET_ENABLED, enabled ? 1 : 0, 0).sendToTarget();
+        }
+    };
+
+    class MyHandler extends Handler {
+
+        MyHandler(Looper mainLooper) {
+            super(mainLooper);
+        }
+
+        @Override
+        public void handleMessage(Message message) {
+            switch (message.what) {
+                case DO_SET_ENABLED :
+                    synchronized (mHandler) {
+                        mIsEnabled = (message.arg1 == 1);
+                    }
+                    return;
+                default :
+                    Log.w(LOG_TAG, "Unknown message type: " + message.what);
+            }
+        }
+    }
+
+    /**
+     * Get an AccessibilityManager instance (create one if necessary).
+     *
+     * @hide
+     */
+    public static AccessibilityManager getInstance(Context context) {
+        synchronized (sInstanceSync) {
+            if (sInstance == null) {
+                sInstance = new AccessibilityManager(context);
+            }
+        }
+        return sInstance;
+    }
+
+    /**
+     * Create an instance.
+     *
+     * @param context A {@link Context}.
+     */
+    private AccessibilityManager(Context context) {
+        mHandler = new MyHandler(context.getMainLooper());
+        IBinder iBinder = ServiceManager.getService(Context.ACCESSIBILITY_SERVICE);
+        mService = IAccessibilityManager.Stub.asInterface(iBinder);
+        try {
+            mService.addClient(mClient);
+        } catch (RemoteException re) {
+            Log.e(LOG_TAG, "AccessibilityManagerService is dead", re);
+        }
+    }
+
+    /**
+     * Returns if the {@link AccessibilityManager} is enabled.
+     *
+     * @return True if this {@link AccessibilityManager} is enabled, false otherwise.
+     */
+    public boolean isEnabled() {
+        synchronized (mHandler) {
+            return mIsEnabled;
+        }
+    }
+
+    /**
+     * Sends an {@link AccessibilityEvent}. If this {@link AccessibilityManager} is not
+     * enabled the call is a NOOP.
+     *
+     * @param event The {@link AccessibilityEvent}.
+     *
+     * @throws IllegalStateException if a client tries to send an {@link AccessibilityEvent}
+     *         while accessibility is not enabled.
+     */
+    public void sendAccessibilityEvent(AccessibilityEvent event) {
+        if (!mIsEnabled) {
+            throw new IllegalStateException("Accessibility off. Did you forget to check that?");
+        }
+        boolean doRecycle = false;
+        try {
+            event.setEventTime(SystemClock.uptimeMillis());
+            // it is possible that this manager is in the same process as the service but
+            // client using it is called through Binder from another process. Example: MMS
+            // app adds a SMS notification and the NotificationManagerService calls this method
+            long identityToken = Binder.clearCallingIdentity();
+            doRecycle = mService.sendAccessibilityEvent(event);
+            Binder.restoreCallingIdentity(identityToken);
+            if (LOGV) {
+                Log.i(LOG_TAG, event + " sent");
+            }
+        } catch (RemoteException re) {
+            Log.e(LOG_TAG, "Error during sending " + event + " ", re);
+        } finally {
+            if (doRecycle) {
+                event.recycle();
+            }
+        }
+    }
+
+    /**
+     * Requests interruption of the accessibility feedback from all accessibility services.
+     */
+    public void interrupt() {
+        if (!mIsEnabled) {
+            throw new IllegalStateException("Accessibility off. Did you forget to check that?");
+        }
+        try {
+            mService.interrupt();
+            if (LOGV) {
+                Log.i(LOG_TAG, "Requested interrupt from all services");
+            }
+        } catch (RemoteException re) {
+            Log.e(LOG_TAG, "Error while requesting interrupt from all services. ", re);
+        }
+    }
+
+    /**
+     * Returns the {@link ServiceInfo}s of the installed accessibility services.
+     *
+     * @return An unmodifiable list with {@link ServiceInfo}s.
+     */
+    public List<ServiceInfo> getAccessibilityServiceList() {
+        List<ServiceInfo> services = null;
+        try {
+            services = mService.getAccessibilityServiceList();
+            if (LOGV) {
+                Log.i(LOG_TAG, "Installed AccessibilityServices " + services);
+            }
+        } catch (RemoteException re) {
+            Log.e(LOG_TAG, "Error while obtaining the installed AccessibilityServices. ", re);
+        }
+        return Collections.unmodifiableList(services);
+    }
+}
diff --git a/core/java/android/view/accessibility/IAccessibilityManager.aidl b/core/java/android/view/accessibility/IAccessibilityManager.aidl
new file mode 100644
index 0000000..32788be
--- /dev/null
+++ b/core/java/android/view/accessibility/IAccessibilityManager.aidl
@@ -0,0 +1,39 @@
+/* //device/java/android/android/app/INotificationManager.aidl
+**
+** Copyright 2009, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+package android.view.accessibility;
+
+import android.view.accessibility.AccessibilityEvent;
+import android.view.accessibility.IAccessibilityManagerClient;
+import android.content.pm.ServiceInfo;
+
+/**
+ * Interface implemented by the AccessibilityManagerService called by
+ * the AccessibilityMasngers.
+ *
+ * @hide
+ */
+interface IAccessibilityManager {
+
+    void addClient(IAccessibilityManagerClient client);
+
+    boolean sendAccessibilityEvent(in AccessibilityEvent uiEvent);
+
+    List<ServiceInfo> getAccessibilityServiceList();
+
+    void interrupt();
+}
diff --git a/core/java/android/view/accessibility/IAccessibilityManagerClient.aidl b/core/java/android/view/accessibility/IAccessibilityManagerClient.aidl
new file mode 100644
index 0000000..1eb60fc
--- /dev/null
+++ b/core/java/android/view/accessibility/IAccessibilityManagerClient.aidl
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view.accessibility;
+
+/**
+ * Interface a client of the IAccessibilityManager implements to
+ * receive information about changes in the manager state.
+ *
+ * @hide
+ */
+oneway interface IAccessibilityManagerClient {
+
+    void setEnabled(boolean enabled);
+
+}