Fix gpx lock in the start of a recording. Use a handler thread

to obtain locationListener callbacks.

MyTracks/src/com/google/android/apps/mytracks/services/TrackRecordingService.java

@@ -250,12 +250,8 @@ public class TrackRecordingService extends Service {
       @Override
     public void run() {
       if (isRecording() && !isPaused()) {
-        handler.post(new Runnable() {
-          public void run() {
         registerLocationListener();
       }
-        });
-      }
     }
   };
 
@@ -962,6 +958,12 @@ public class TrackRecordingService extends Service {
    * Registers the location listener.
    */
   private void registerLocationListener() {
+    /*
+     * Use the handler so the requestLocationUpdaets locationListener will be
+     * invoked on the handler thread.
+     */
+    handler.post(new Runnable() {
+      public void run() {
         unregisterLocationListener();
 
         if (myTracksLocationManager == null) {
@@ -970,13 +972,16 @@ public class TrackRecordingService extends Service {
         }
         try {
           long interval = locationListenerPolicy.getDesiredPollingInterval();
-      myTracksLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, interval,
+          myTracksLocationManager.requestLocationUpdates(
-          locationListenerPolicy.getMinDistance(), locationListener);
+              LocationManager.GPS_PROVIDER, interval, locationListenerPolicy.getMinDistance(),
+              locationListener);
           currentRecordingInterval = interval;
         } catch (RuntimeException e) {
           Log.e(TAG, "Could not register location listener.", e);
         }
       }
+    });
+  }
 
   /**
    * Unregisters the location manager.