diff --git a/api/current.xml b/api/current.xml
index 0cf46eb..0df3891 100644
--- a/api/current.xml
+++ b/api/current.xml
@@ -157199,6 +157199,160 @@
 >
 </field>
 </interface>
+<class name="MediaStore.Files"
+ extends="java.lang.Object"
+ abstract="false"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<constructor name="MediaStore.Files"
+ type="android.provider.MediaStore.Files"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</constructor>
+<method name="getContentUri"
+ return="android.net.Uri"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="true"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="volumeName" type="java.lang.String">
+</parameter>
+</method>
+<method name="getContentUri"
+ return="android.net.Uri"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="volumeName" type="java.lang.String">
+</parameter>
+<parameter name="rowId" type="long">
+</parameter>
+</method>
+</class>
+<interface name="MediaStore.Files.FileColumns"
+ abstract="true"
+ static="true"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<implements name="android.provider.MediaStore.MediaColumns">
+</implements>
+<field name="MEDIA_TYPE"
+ type="java.lang.String"
+ transient="false"
+ volatile="false"
+ value="&quot;media_type&quot;"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="MEDIA_TYPE_AUDIO"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="2"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="MEDIA_TYPE_IMAGE"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="1"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="MEDIA_TYPE_NONE"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="0"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="MEDIA_TYPE_PLAYLIST"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="4"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="MEDIA_TYPE_VIDEO"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="3"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="MIME_TYPE"
+ type="java.lang.String"
+ transient="false"
+ volatile="false"
+ value="&quot;mime_type&quot;"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="PARENT"
+ type="java.lang.String"
+ transient="false"
+ volatile="false"
+ value="&quot;parent&quot;"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="TITLE"
+ type="java.lang.String"
+ transient="false"
+ volatile="false"
+ value="&quot;title&quot;"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+</interface>
 <class name="MediaStore.Images"
  extends="java.lang.Object"
  abstract="false"
diff --git a/core/java/android/provider/MediaStore.java b/core/java/android/provider/MediaStore.java
index b74e76f..f111ef2 100644
--- a/core/java/android/provider/MediaStore.java
+++ b/core/java/android/provider/MediaStore.java
@@ -266,36 +266,62 @@
      }
 
     /**
-     * Media provider table containing an index of all files in the storage.
-     * This can be used by applications to find all documents of a particular type
-     * and is also used internally by the device side MTP implementation.
-     * @hide
+     * Media provider table containing an index of all files in the media storage,
+     * including non-media files.  This should be used by applications that work with
+     * non-media file types (text, HTML, PDF, etc) as well as applications that need to
+     * work with multiple media file types in a single query.
      */
     public static final class Files {
 
+        /**
+         * Get the content:// style URI for the files table on the
+         * given volume.
+         *
+         * @param volumeName the name of the volume to get the URI for
+         * @return the URI to the files table on the given volume
+         */
         public static Uri getContentUri(String volumeName) {
             return Uri.parse(CONTENT_AUTHORITY_SLASH + volumeName +
                     "/file");
         }
 
+        /**
+         * Get the content:// style URI for a single row in the files table on the
+         * given volume.
+         *
+         * @param volumeName the name of the volume to get the URI for
+         * @param rowId the file to get the URI for
+         * @return the URI to the files table on the given volume
+         */
         public static final Uri getContentUri(String volumeName,
-                long fileId) {
+                long rowId) {
             return Uri.parse(CONTENT_AUTHORITY_SLASH + volumeName
-                    + "/file/" + fileId);
+                    + "/file/" + rowId);
         }
 
+        /**
+         * For use only by the MTP implementation.
+         * @hide
+         */
         public static Uri getMtpObjectsUri(String volumeName) {
             return Uri.parse(CONTENT_AUTHORITY_SLASH + volumeName +
                     "/object");
         }
 
+        /**
+         * For use only by the MTP implementation.
+         * @hide
+         */
         public static final Uri getMtpObjectsUri(String volumeName,
                 long fileId) {
             return Uri.parse(CONTENT_AUTHORITY_SLASH + volumeName
                     + "/object/" + fileId);
         }
 
-        // Used to implement the MTP GetObjectReferences and SetObjectReferences commands.
+        /**
+         * Used to implement the MTP GetObjectReferences and SetObjectReferences commands.
+         * @hide
+         */
         public static final Uri getMtpReferencesUri(String volumeName,
                 long fileId) {
             return Uri.parse(CONTENT_AUTHORITY_SLASH + volumeName
@@ -310,6 +336,7 @@
             /**
              * The MTP format code of the file
              * <P>Type: INTEGER</P>
+             * @hide
              */
             public static final String FORMAT = "format";