Create a common method for updating the title of a download from the filename.

This method will be used by the DownloadProvider and the BrowserDownloadPage.

core/java/android/provider/Downloads.java

@@ -17,6 +17,11 @@
 package android.provider;
 
 import android.net.Uri;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Context;
+
+import java.io.File;
 
 /**
  * The Download Manager
@@ -1065,5 +1070,27 @@ public final class Downloads {
          */
         public static final int VISIBILITY_HIDDEN = 2;
 
+        /**
+         * Using a file name, create a title for a download.  Then store it in
+         * the database and return it.
+         *
+         * @param context Context for reaching the {@link ContentResolver} so
+         *      the database can be updated with the new title.
+         * @param filename Full path to the file.  Used to generate a title.
+         * @param id Id of the download, so the new title can be stored in the
+         *      database
+         * @return String Newly created title.
+         * @hide
+         */
+        public static String createTitleFromFilename(Context context,
+                String filename, long id) {
+            if (filename == null) return null;
+            String title = new File(filename).getName();
+            ContentValues values = new ContentValues();
+            values.put(COLUMN_TITLE, title);
+            context.getContentResolver().update(ContentUris.withAppendedId(
+                    CONTENT_URI, id), values, null, null);
+            return title;
+        }
     }
 }