Add constans for MTP event codes.

BUG=23368533

Change-Id: I922eb9a26812a44780ba81b8a391be45852cad08

3 files changed, 58 insertions, 2 deletions

diff --git a/api/current.txt b/api/current.txt
index ef18bf9f05f6..301878df5282 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -18173,6 +18173,24 @@ package android.mtp {
   public class MtpEvent {
     ctor public MtpEvent();
     method public int getEventCode();
+    field public static final int EVENT_CANCEL_TRANSACTION = 16385; // 0x4001
+    field public static final int EVENT_CAPTURE_COMPLETE = 16397; // 0x400d
+    field public static final int EVENT_DEVICE_INFO_CHANGED = 16392; // 0x4008
+    field public static final int EVENT_DEVICE_PROP_CHANGED = 16390; // 0x4006
+    field public static final int EVENT_DEVICE_RESET = 16395; // 0x400b
+    field public static final int EVENT_OBJECT_ADDED = 16386; // 0x4002
+    field public static final int EVENT_OBJECT_INFO_CHANGED = 16391; // 0x4007
+    field public static final int EVENT_OBJECT_PROP_CHANGED = 51201; // 0xc801
+    field public static final int EVENT_OBJECT_PROP_DESC_CHANGED = 51202; // 0xc802
+    field public static final int EVENT_OBJECT_REFERENCES_CHANGED = 51203; // 0xc803
+    field public static final int EVENT_OBJECT_REMOVED = 16387; // 0x4003
+    field public static final int EVENT_REQUEST_OBJECT_TRANSFER = 16393; // 0x4009
+    field public static final int EVENT_STORAGE_INFO_CHANGED = 16396; // 0x400c
+    field public static final int EVENT_STORE_ADDED = 16388; // 0x4004
+    field public static final int EVENT_STORE_FULL = 16394; // 0x400a
+    field public static final int EVENT_STORE_REMOVED = 16389; // 0x4005
+    field public static final int EVENT_UNDEFINED = 16384; // 0x4000
+    field public static final int EVENT_UNREPORTED_STATUS = 16398; // 0x400e
   }
 
   public final class MtpObjectInfo {
diff --git a/api/system-current.txt b/api/system-current.txt
index 0b216bdddb30..abafb359b216 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -19685,6 +19685,24 @@ package android.mtp {
   public class MtpEvent {
     ctor public MtpEvent();
     method public int getEventCode();
+    field public static final int EVENT_CANCEL_TRANSACTION = 16385; // 0x4001
+    field public static final int EVENT_CAPTURE_COMPLETE = 16397; // 0x400d
+    field public static final int EVENT_DEVICE_INFO_CHANGED = 16392; // 0x4008
+    field public static final int EVENT_DEVICE_PROP_CHANGED = 16390; // 0x4006
+    field public static final int EVENT_DEVICE_RESET = 16395; // 0x400b
+    field public static final int EVENT_OBJECT_ADDED = 16386; // 0x4002
+    field public static final int EVENT_OBJECT_INFO_CHANGED = 16391; // 0x4007
+    field public static final int EVENT_OBJECT_PROP_CHANGED = 51201; // 0xc801
+    field public static final int EVENT_OBJECT_PROP_DESC_CHANGED = 51202; // 0xc802
+    field public static final int EVENT_OBJECT_REFERENCES_CHANGED = 51203; // 0xc803
+    field public static final int EVENT_OBJECT_REMOVED = 16387; // 0x4003
+    field public static final int EVENT_REQUEST_OBJECT_TRANSFER = 16393; // 0x4009
+    field public static final int EVENT_STORAGE_INFO_CHANGED = 16396; // 0x400c
+    field public static final int EVENT_STORE_ADDED = 16388; // 0x4004
+    field public static final int EVENT_STORE_FULL = 16394; // 0x400a
+    field public static final int EVENT_STORE_REMOVED = 16389; // 0x4005
+    field public static final int EVENT_UNDEFINED = 16384; // 0x4000
+    field public static final int EVENT_UNREPORTED_STATUS = 16398; // 0x400e
   }
 
   public final class MtpObjectInfo {
diff --git a/media/java/android/mtp/MtpEvent.java b/media/java/android/mtp/MtpEvent.java
index 0fa7d93e12ca..4c8a74200ee0 100644
--- a/media/java/android/mtp/MtpEvent.java
+++ b/media/java/android/mtp/MtpEvent.java
@@ -18,13 +18,33 @@ package android.mtp;
 
 /**
  * This class encapsulates information about a MTP event.
+ * Event constants are defined by the USB-IF MTP specification.
  */
 public class MtpEvent {
-    private int mEventCode;
+    public static final int EVENT_UNDEFINED = 0x4000;
+    public static final int EVENT_CANCEL_TRANSACTION = 0x4001;
+    public static final int EVENT_OBJECT_ADDED = 0x4002;
+    public static final int EVENT_OBJECT_REMOVED = 0x4003;
+    public static final int EVENT_STORE_ADDED = 0x4004;
+    public static final int EVENT_STORE_REMOVED = 0x4005;
+    public static final int EVENT_DEVICE_PROP_CHANGED = 0x4006;
+    public static final int EVENT_OBJECT_INFO_CHANGED = 0x4007;
+    public static final int EVENT_DEVICE_INFO_CHANGED = 0x4008;
+    public static final int EVENT_REQUEST_OBJECT_TRANSFER = 0x4009;
+    public static final int EVENT_STORE_FULL = 0x400A;
+    public static final int EVENT_DEVICE_RESET = 0x400B;
+    public static final int EVENT_STORAGE_INFO_CHANGED = 0x400C;
+    public static final int EVENT_CAPTURE_COMPLETE = 0x400D;
+    public static final int EVENT_UNREPORTED_STATUS = 0x400E;
+    public static final int EVENT_OBJECT_PROP_CHANGED = 0xC801;
+    public static final int EVENT_OBJECT_PROP_DESC_CHANGED = 0xC802;
+    public static final int EVENT_OBJECT_REFERENCES_CHANGED = 0xC803;
+
+    private int mEventCode = EVENT_UNDEFINED;
 
     /**
      * Returns event code of MTP event.
-     *
+     * See the USB-IF MTP specification for the details of event constants.
      * @return event code
      */
     public int getEventCode() { return mEventCode; }