diff --git a/MyTracks/src/com/google/android/apps/mytracks/services/ITrackRecordingService.aidl b/MyTracks/src/com/google/android/apps/mytracks/services/ITrackRecordingService.aidl
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index 000000000..a274a7980
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+++ b/MyTracks/src/com/google/android/apps/mytracks/services/ITrackRecordingService.aidl
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2008 Google Inc.
+ * 
+ * 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.
+ */
+package com.google.android.apps.mytracks.services;
+
+import com.google.android.apps.mytracks.content.Waypoint;
+
+/**
+ * MyTracks service.
+ * This service is the process that actually records and manages tracks.
+ */
+interface ITrackRecordingService {
+
+  /**
+   * Starts recording a new track.
+   *
+   * @return the track ID of the new track
+   */
+  long startNewTrack();
+
+  /**
+   * Checks and returns whether we're currently recording a track.
+   */
+  boolean isRecording();
+
+  /**
+   * Inserts a waypoint marker in the track being recorded.
+   *
+   * @param waypoint the waypoint to insert
+   */
+  long insertWaypointMarker(in Waypoint waypoint);
+
+  /**
+   * Inserts a statistics marker in the track being recorded.
+   *
+   * @param location the location at which to insert the marker
+   * @return the unique ID of the inserted marker
+   */
+  long insertStatisticsMarker(in Location location);
+
+  /**
+   * Inserts a location in the track being recorded.
+   *
+   * When recording, locations detected by the GPS are already automatically
+   * added to the track, so this should be used only for adding special points
+   * or for testing.
+   *
+   * @param loc the location to insert
+   */
+  void recordLocation(in Location loc);
+
+  /**
+   * Stops recording the current track.
+   */
+  void endCurrentTrack();
+
+  /**
+   * Returns whether at least one track has been or is being recorded (and was
+   * not deleted).
+   */
+  boolean hasRecorded();
+
+  /**
+   * Deletes all the stored tracks.
+   */
+  void deleteAllTracks();
+
+  /**
+   * Notifies the service that its preferences may have been changed.
+   * This is necessary because the service running on a separate process cannot
+   * listen to the changes itself.
+   *
+   * @param key the preference key which may have changed
+   */
+  void sharedPreferenceChanged(in String key);
+}