diff --git a/include/androidfw/Input.h b/include/androidfw/Input.h
index f8cbdde..a98e1a2 100644
--- a/include/androidfw/Input.h
+++ b/include/androidfw/Input.h
@@ -811,117 +811,6 @@
     VelocityTracker mVelocityTracker;
 };
 
-/*
- * Identifies a device.
- */
-struct InputDeviceIdentifier {
-    inline InputDeviceIdentifier() :
-            bus(0), vendor(0), product(0), version(0) {
-    }
-
-    // Information provided by the kernel.
-    String8 name;
-    String8 location;
-    String8 uniqueId;
-    uint16_t bus;
-    uint16_t vendor;
-    uint16_t product;
-    uint16_t version;
-
-    // A composite input device descriptor string that uniquely identifies the device
-    // even across reboots or reconnections.  The value of this field is used by
-    // upper layers of the input system to associate settings with individual devices.
-    // It is hashed from whatever kernel provided information is available.
-    // Ideally, the way this value is computed should not change between Android releases
-    // because that would invalidate persistent settings that rely on it.
-    String8 descriptor;
-};
-
-/*
- * Describes the characteristics and capabilities of an input device.
- */
-class InputDeviceInfo {
-public:
-    InputDeviceInfo();
-    InputDeviceInfo(const InputDeviceInfo& other);
-    ~InputDeviceInfo();
-
-    struct MotionRange {
-        int32_t axis;
-        uint32_t source;
-        float min;
-        float max;
-        float flat;
-        float fuzz;
-    };
-
-    void initialize(int32_t id, const String8& name, const String8& descriptor);
-
-    inline int32_t getId() const { return mId; }
-    inline const String8 getName() const { return mName; }
-    inline const String8 getDescriptor() const { return mDescriptor; }
-    inline uint32_t getSources() const { return mSources; }
-
-    const MotionRange* getMotionRange(int32_t axis, uint32_t source) const;
-
-    void addSource(uint32_t source);
-    void addMotionRange(int32_t axis, uint32_t source,
-            float min, float max, float flat, float fuzz);
-    void addMotionRange(const MotionRange& range);
-
-    inline void setKeyboardType(int32_t keyboardType) { mKeyboardType = keyboardType; }
-    inline int32_t getKeyboardType() const { return mKeyboardType; }
-
-    inline void setKeyCharacterMapFile(const String8& value) { mKeyCharacterMapFile = value; }
-    inline const String8& getKeyCharacterMapFile() const { return mKeyCharacterMapFile; }
-
-    inline const Vector<MotionRange>& getMotionRanges() const {
-        return mMotionRanges;
-    }
-
-private:
-    int32_t mId;
-    String8 mName;
-    String8 mDescriptor;
-    uint32_t mSources;
-    int32_t mKeyboardType;
-    String8 mKeyCharacterMapFile;
-
-    Vector<MotionRange> mMotionRanges;
-};
-
-/* Types of input device configuration files. */
-enum InputDeviceConfigurationFileType {
-    INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION = 0,     /* .idc file */
-    INPUT_DEVICE_CONFIGURATION_FILE_TYPE_KEY_LAYOUT = 1,        /* .kl file */
-    INPUT_DEVICE_CONFIGURATION_FILE_TYPE_KEY_CHARACTER_MAP = 2, /* .kcm file */
-};
-
-/*
- * Gets the path of an input device configuration file, if one is available.
- * Considers both system provided and user installed configuration files.
- *
- * The device identifier is used to construct several default configuration file
- * names to try based on the device name, vendor, product, and version.
- *
- * Returns an empty string if not found.
- */
-extern String8 getInputDeviceConfigurationFilePathByDeviceIdentifier(
-        const InputDeviceIdentifier& deviceIdentifier,
-        InputDeviceConfigurationFileType type);
-
-/*
- * Gets the path of an input device configuration file, if one is available.
- * Considers both system provided and user installed configuration files.
- *
- * The name is case-sensitive and is used to construct the filename to resolve.
- * All characters except 'a'-'z', 'A'-'Z', '0'-'9', '-', and '_' are replaced by underscores.
- *
- * Returns an empty string if not found.
- */
-extern String8 getInputDeviceConfigurationFilePathByName(
-        const String8& name, InputDeviceConfigurationFileType type);
-
 } // namespace android
 
 #endif // _ANDROIDFW_INPUT_H
diff --git a/include/androidfw/InputDevice.h b/include/androidfw/InputDevice.h
new file mode 100644
index 0000000..c9554dc
--- /dev/null
+++ b/include/androidfw/InputDevice.h
@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+#ifndef _ANDROIDFW_INPUT_DEVICE_H
+#define _ANDROIDFW_INPUT_DEVICE_H
+
+#include <androidfw/Input.h>
+#include <androidfw/KeyCharacterMap.h>
+
+namespace android {
+
+/*
+ * Identifies a device.
+ */
+struct InputDeviceIdentifier {
+    inline InputDeviceIdentifier() :
+            bus(0), vendor(0), product(0), version(0) {
+    }
+
+    // Information provided by the kernel.
+    String8 name;
+    String8 location;
+    String8 uniqueId;
+    uint16_t bus;
+    uint16_t vendor;
+    uint16_t product;
+    uint16_t version;
+
+    // A composite input device descriptor string that uniquely identifies the device
+    // even across reboots or reconnections.  The value of this field is used by
+    // upper layers of the input system to associate settings with individual devices.
+    // It is hashed from whatever kernel provided information is available.
+    // Ideally, the way this value is computed should not change between Android releases
+    // because that would invalidate persistent settings that rely on it.
+    String8 descriptor;
+};
+
+/*
+ * Describes the characteristics and capabilities of an input device.
+ */
+class InputDeviceInfo {
+public:
+    InputDeviceInfo();
+    InputDeviceInfo(const InputDeviceInfo& other);
+    ~InputDeviceInfo();
+
+    struct MotionRange {
+        int32_t axis;
+        uint32_t source;
+        float min;
+        float max;
+        float flat;
+        float fuzz;
+    };
+
+    void initialize(int32_t id, const String8& name, const String8& descriptor);
+
+    inline int32_t getId() const { return mId; }
+    inline const String8 getName() const { return mName; }
+    inline const String8 getDescriptor() const { return mDescriptor; }
+    inline uint32_t getSources() const { return mSources; }
+
+    const MotionRange* getMotionRange(int32_t axis, uint32_t source) const;
+
+    void addSource(uint32_t source);
+    void addMotionRange(int32_t axis, uint32_t source,
+            float min, float max, float flat, float fuzz);
+    void addMotionRange(const MotionRange& range);
+
+    inline void setKeyboardType(int32_t keyboardType) { mKeyboardType = keyboardType; }
+    inline int32_t getKeyboardType() const { return mKeyboardType; }
+
+    inline void setKeyCharacterMap(const sp<KeyCharacterMap>& value) {
+        mKeyCharacterMap = value;
+    }
+
+    inline sp<KeyCharacterMap> getKeyCharacterMap() const {
+        return mKeyCharacterMap;
+    }
+
+    inline const Vector<MotionRange>& getMotionRanges() const {
+        return mMotionRanges;
+    }
+
+private:
+    int32_t mId;
+    String8 mName;
+    String8 mDescriptor;
+    uint32_t mSources;
+    int32_t mKeyboardType;
+    sp<KeyCharacterMap> mKeyCharacterMap;
+
+    Vector<MotionRange> mMotionRanges;
+};
+
+/* Types of input device configuration files. */
+enum InputDeviceConfigurationFileType {
+    INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION = 0,     /* .idc file */
+    INPUT_DEVICE_CONFIGURATION_FILE_TYPE_KEY_LAYOUT = 1,        /* .kl file */
+    INPUT_DEVICE_CONFIGURATION_FILE_TYPE_KEY_CHARACTER_MAP = 2, /* .kcm file */
+};
+
+/*
+ * Gets the path of an input device configuration file, if one is available.
+ * Considers both system provided and user installed configuration files.
+ *
+ * The device identifier is used to construct several default configuration file
+ * names to try based on the device name, vendor, product, and version.
+ *
+ * Returns an empty string if not found.
+ */
+extern String8 getInputDeviceConfigurationFilePathByDeviceIdentifier(
+        const InputDeviceIdentifier& deviceIdentifier,
+        InputDeviceConfigurationFileType type);
+
+/*
+ * Gets the path of an input device configuration file, if one is available.
+ * Considers both system provided and user installed configuration files.
+ *
+ * The name is case-sensitive and is used to construct the filename to resolve.
+ * All characters except 'a'-'z', 'A'-'Z', '0'-'9', '-', and '_' are replaced by underscores.
+ *
+ * Returns an empty string if not found.
+ */
+extern String8 getInputDeviceConfigurationFilePathByName(
+        const String8& name, InputDeviceConfigurationFileType type);
+
+} // namespace android
+
+#endif // _ANDROIDFW_INPUT_DEVICE_H
diff --git a/include/androidfw/KeyCharacterMap.h b/include/androidfw/KeyCharacterMap.h
index 679dd2c..3cc1cb2 100644
--- a/include/androidfw/KeyCharacterMap.h
+++ b/include/androidfw/KeyCharacterMap.h
@@ -19,12 +19,17 @@
 
 #include <stdint.h>
 
+#if HAVE_ANDROID_OS
+#include <binder/IBinder.h>
+#endif
+
 #include <androidfw/Input.h>
 #include <utils/Errors.h>
 #include <utils/KeyedVector.h>
 #include <utils/Tokenizer.h>
 #include <utils/String8.h>
 #include <utils/Unicode.h>
+#include <utils/RefBase.h>
 
 namespace android {
 
@@ -32,8 +37,10 @@
  * Describes a mapping from Android key codes to characters.
  * Also specifies other functions of the keyboard such as the keyboard type
  * and key modifier semantics.
+ *
+ * This object is immutable after it has been loaded.
  */
-class KeyCharacterMap {
+class KeyCharacterMap : public RefBase {
 public:
     enum KeyboardType {
         KEYBOARD_TYPE_UNKNOWN = 0,
@@ -50,9 +57,11 @@
         int32_t metaState;
     };
 
-    ~KeyCharacterMap();
+    /* Loads a key character map from a file. */
+    static status_t load(const String8& filename, sp<KeyCharacterMap>* outMap);
 
-    static status_t load(const String8& filename, KeyCharacterMap** outMap);
+    /* Returns an empty key character map. */
+    static sp<KeyCharacterMap> empty();
 
     /* Gets the keyboard type. */
     int32_t getKeyboardType() const;
@@ -92,6 +101,17 @@
     bool getEvents(int32_t deviceId, const char16_t* chars, size_t numChars,
             Vector<KeyEvent>& outEvents) const;
 
+#if HAVE_ANDROID_OS
+    /* Reads a key map from a parcel. */
+    static sp<KeyCharacterMap> readFromParcel(Parcel* parcel);
+
+    /* Writes a key map to a parcel. */
+    void writeToParcel(Parcel* parcel) const;
+#endif
+
+protected:
+    virtual ~KeyCharacterMap();
+
 private:
     struct Behavior {
         Behavior();
@@ -162,6 +182,8 @@
         status_t parseCharacterLiteral(char16_t* outCharacter);
     };
 
+    static sp<KeyCharacterMap> sEmpty;
+
     KeyedVector<int32_t, Key*> mKeys;
     int mType;
 
diff --git a/include/androidfw/KeyLayoutMap.h b/include/androidfw/KeyLayoutMap.h
index 5a6f550..5408680 100644
--- a/include/androidfw/KeyLayoutMap.h
+++ b/include/androidfw/KeyLayoutMap.h
@@ -21,6 +21,7 @@
 #include <utils/Errors.h>
 #include <utils/KeyedVector.h>
 #include <utils/Tokenizer.h>
+#include <utils/RefBase.h>
 
 namespace android {
 
@@ -56,18 +57,21 @@
 
 /**
  * Describes a mapping from keyboard scan codes and joystick axes to Android key codes and axes.
+ *
+ * This object is immutable after it has been loaded.
  */
-class KeyLayoutMap {
+class KeyLayoutMap : public RefBase {
 public:
-    ~KeyLayoutMap();
-
-    static status_t load(const String8& filename, KeyLayoutMap** outMap);
+    static status_t load(const String8& filename, sp<KeyLayoutMap>* outMap);
 
     status_t mapKey(int32_t scanCode, int32_t* keyCode, uint32_t* flags) const;
     status_t findScanCodesForKey(int32_t keyCode, Vector<int32_t>* outScanCodes) const;
 
     status_t mapAxis(int32_t scanCode, AxisInfo* outAxisInfo) const;
 
+protected:
+    virtual ~KeyLayoutMap();
+
 private:
     struct Key {
         int32_t keyCode;
diff --git a/include/androidfw/Keyboard.h b/include/androidfw/Keyboard.h
index ae65198..6537a8f 100644
--- a/include/androidfw/Keyboard.h
+++ b/include/androidfw/Keyboard.h
@@ -18,6 +18,7 @@
 #define _ANDROIDFW_KEYBOARD_H
 
 #include <androidfw/Input.h>
+#include <androidfw/InputDevice.h>
 #include <utils/Errors.h>
 #include <utils/String8.h>
 #include <utils/PropertyMap.h>
@@ -42,10 +43,10 @@
 class KeyMap {
 public:
     String8 keyLayoutFile;
-    KeyLayoutMap* keyLayoutMap;
+    sp<KeyLayoutMap> keyLayoutMap;
 
     String8 keyCharacterMapFile;
-    KeyCharacterMap* keyCharacterMap;
+    sp<KeyCharacterMap> keyCharacterMap;
 
     KeyMap();
     ~KeyMap();
diff --git a/include/androidfw/VirtualKeyMap.h b/include/androidfw/VirtualKeyMap.h
index 66340e3..dd3ad1e9 100644
--- a/include/androidfw/VirtualKeyMap.h
+++ b/include/androidfw/VirtualKeyMap.h
@@ -43,6 +43,8 @@
 /**
  * Describes a collection of virtual keys on a touch screen in terms of
  * virtual scan codes and hit rectangles.
+ *
+ * This object is immutable after it has been loaded.
  */
 class VirtualKeyMap {
 public: