diff --git a/media/libmediaplayerservice/ActivityManager.cpp b/media/libmediaplayerservice/ActivityManager.cpp
new file mode 100644
index 0000000..60a209f
--- /dev/null
+++ b/media/libmediaplayerservice/ActivityManager.cpp
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2006 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.
+ */
+
+#include <unistd.h>
+#include <binder/IBinder.h>
+#include <binder/IServiceManager.h>
+#include <binder/Parcel.h>
+#include <utils/String8.h>
+
+#include "ActivityManager.h"
+
+namespace android {
+
+const uint32_t OPEN_CONTENT_URI_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION + 4;
+
+// Perform ContentProvider.openFile() on the given URI, returning
+// the resulting native file descriptor.  Returns < 0 on error.
+int openContentProviderFile(const String16& uri)
+{
+    int fd = -1;
+
+    sp<IServiceManager> sm = defaultServiceManager();
+    sp<IBinder> am = sm->getService(String16("activity"));
+    if (am != NULL) {
+        Parcel data, reply;
+        data.writeInterfaceToken(String16("android.app.IActivityManager"));
+        data.writeString16(uri);
+        status_t ret = am->transact(OPEN_CONTENT_URI_TRANSACTION, data, &reply);
+        if (ret == NO_ERROR) {
+            int32_t exceptionCode = reply.readExceptionCode();
+            if (!exceptionCode) {
+                // Success is indicated here by a nonzero int followed by the fd;
+                // failure by a zero int with no data following.
+                if (reply.readInt32() != 0) {
+                    fd = dup(reply.readFileDescriptor());
+                }
+            } else {
+                // An exception was thrown back; fall through to return failure
+                ALOGD("openContentUri(%s) caught exception %d\n",
+                        String8(uri).string(), exceptionCode);
+            }
+        }
+    }
+
+    return fd;
+}
+
+} /* namespace android */