Bug fixing and refactoring:

1) Make sure no one but service changes recordingTrackId (which is owned by it)
2) Cache sharedPreferences
3) Clear recordingTrackId if it doesn't correspond to a valid track or the service is not recording
4) More unit tests

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

@@ -97,9 +97,10 @@ public class MyTracks extends TabActivity implements OnTouchListener,
   /**
    * Singleton instance
    */
-  private static MyTracks instance = null;
-  private ChartActivity chartActivity = null;
+  private static MyTracks instance;
 
+  private ChartActivity chartActivity;
+  
   public ChartActivity getChartActivity() {
     return chartActivity;
   }
@@ -178,6 +179,8 @@ public class MyTracks extends TabActivity implements OnTouchListener,
    * Utilities to deal with the database.
    */
   private MyTracksProviderUtils providerUtils;
+  
+  private SharedPreferences sharedPreferences;
 
   /**
    * The connection to the track recording service.
@@ -275,6 +278,7 @@ public class MyTracks extends TabActivity implements OnTouchListener,
     instance = this;
     providerUtils = MyTracksProviderUtils.Factory.get(this);
     menuManager = new MenuManager(this);
+    sharedPreferences = getSharedPreferences(MyTracksSettings.SETTINGS_NAME, 0);
 
     // The volume we want to control is the Text-To-Speech volume
     int volumeStream =
@@ -310,14 +314,12 @@ public class MyTracks extends TabActivity implements OnTouchListener,
     tabHost.addView(layout);
     layout.setOnTouchListener(this);
 
-    SharedPreferences prefs =
-        getSharedPreferences(MyTracksSettings.SETTINGS_NAME, 0);
-    if (prefs != null) {
+    if (sharedPreferences != null) {
       selectedTrackId =
-          prefs.getLong(getString(R.string.selected_track_key), -1);
-      recordingTrackId =
-          prefs.getLong(getString(R.string.recording_track_key), -1);
-      prefs.registerOnSharedPreferenceChangeListener(this);
+          sharedPreferences.getLong(getString(R.string.selected_track_key), -1);
+      recordingTrackId = sharedPreferences.getLong(
+          getString(R.string.recording_track_key), -1);
+      sharedPreferences.registerOnSharedPreferenceChangeListener(this);
       Log.d(MyTracksConstants.TAG, "recordingTrackId: " + recordingTrackId
           + ", selectedTrackId: " + selectedTrackId);
       if (recordingTrackId > 0) {
@@ -1029,20 +1031,15 @@ public class MyTracks extends TabActivity implements OnTouchListener,
     shareIntent.putExtra(Intent.EXTRA_SUBJECT,
         getResources().getText(R.string.share_map_subject).toString());
 
-    SharedPreferences prefs =
-        getSharedPreferences(MyTracksSettings.SETTINGS_NAME, 0);
     boolean shareUrlOnly = true;
-    if (prefs != null) {
-      shareUrlOnly =
-          prefs.getBoolean(getString(R.string.share_url_only_key), false);
+    if (sharedPreferences != null) {
+      shareUrlOnly = sharedPreferences.getBoolean(
+          getString(R.string.share_url_only_key), false);
     }
 
     String url = MyMapsConstants.MAPSHOP_BASE_URL + "?msa=0&msid=" + mapId;
-    String msg = (shareUrlOnly
-        ? url
-        : String.format(
-            getResources().getText(R.string.share_map_body_format).toString(),
-            url));
+    String msg = shareUrlOnly ? url : String.format(
+        getResources().getText(R.string.share_map_body_format).toString(), url);
     shareIntent.putExtra(Intent.EXTRA_TEXT, msg);
     startActivity(Intent.createChooser(shareIntent,
         getResources().getText(R.string.share_map).toString()));
@@ -1256,9 +1253,10 @@ public class MyTracks extends TabActivity implements OnTouchListener,
   private void startRecordingNewTrack() {
     try {
       recordingTrackId = trackRecordingService.startNewTrack();
+      // Select the recording track.
+      setSelectedTrack(recordingTrackId);
       Toast.makeText(this, getString(R.string.status_now_recording),
           Toast.LENGTH_SHORT).show();
-      setSelectedAndRecordingTrack(recordingTrackId, recordingTrackId);
     } catch (RemoteException e) {
       Toast.makeText(this,
           getString(R.string.error_unable_to_start_recording),
@@ -1293,7 +1291,6 @@ public class MyTracks extends TabActivity implements OnTouchListener,
       } catch (RemoteException e) {
         Log.e(MyTracksConstants.TAG, "Unable to stop recording.", e);
       }
-      setRecordingTrack(-1);
       Intent intent = new Intent(MyTracks.this, MyTracksDetails.class);
       intent.putExtra("trackid", recordingTrackId);
       intent.putExtra("hasCancelButton", false);
@@ -1348,9 +1345,7 @@ public class MyTracks extends TabActivity implements OnTouchListener,
   public void setSelectedTrack(final long trackId) {
     runOnUiThread(new Runnable() {
       public void run() {
-        SharedPreferences prefs =
-            getSharedPreferences(MyTracksSettings.SETTINGS_NAME, 0);
-        SharedPreferences.Editor editor = prefs.edit();
+        SharedPreferences.Editor editor = sharedPreferences.edit();
         editor.putLong(getString(R.string.selected_track_key), trackId);
         editor.commit();
       }
@@ -1361,44 +1356,6 @@ public class MyTracks extends TabActivity implements OnTouchListener,
     return selectedTrackId;
   }
 
-  /**
-   * Writes the recording track id to the shared preferences.
-   * Executed on the UI thread.
-   *
-   * @param trackId the id of the track
-   */
-  private void setRecordingTrack(final long trackId) {
-    runOnUiThread(new Runnable() {
-      public void run() {
-        SharedPreferences prefs =
-            getSharedPreferences(MyTracksSettings.SETTINGS_NAME, 0);
-        SharedPreferences.Editor editor = prefs.edit();
-        editor.putLong(getString(R.string.recording_track_key), trackId);
-        editor.commit();
-      }
-    });
-  }
-
-  /**
-   * Writes the selected and the recording track id to the shared preferences.
-   * Executed on UI thread.
-   */
-  private void setSelectedAndRecordingTrack(final long theSelectedTrackId,
-      final long theRecordingTrackId) {
-    runOnUiThread(new Runnable() {
-      public void run() {
-        SharedPreferences prefs =
-            getSharedPreferences(MyTracksSettings.SETTINGS_NAME, 0);
-        if (prefs != null) {
-          SharedPreferences.Editor editor = prefs.edit();
-          editor.putLong(getString(R.string.selected_track_key), theSelectedTrackId);
-          editor.putLong(getString(R.string.recording_track_key), theRecordingTrackId);
-          editor.commit();
-        }
-      }
-    });
-  }
-
   /**
    * Binds to track recording service if it is running.
    */

MyTracks/src/com/google/android/apps/mytracks/MyTracksMap.java

@@ -702,7 +702,7 @@ public class MyTracksMap extends MapActivity
    */
   public void setSelectedTrack(final long trackId) {
     Log.d(MyTracksConstants.TAG, "MyTracksMap.setSelectedTrack: "
-        + "id = " + trackId + ", selectedTrackId = " + selectedTrackId);
+        + selectedTrackId + " -> " + trackId);
 
     if (selectedTrackId == trackId) {
       // Selected track did not change, nothing to do.
@@ -1000,15 +1000,18 @@ public class MyTracksMap extends MapActivity
     if (key == null || key.equals(getString(R.string.recording_track_key))) {
       recordingTrackId = sharedPreferences.getLong(
           getString(R.string.recording_track_key), -1);
-      if (isATrackSelected()) {
-        mapOverlay.setShowEndMarker(!isRecordingSelected());
-        mapView.postInvalidate();
-      }
     }
     if (key == null || key.equals(getString(R.string.selected_track_key))) {
       setSelectedTrack(sharedPreferences.getLong(
           getString(R.string.selected_track_key), -1));
     }
+    
+    // Show end marker if the track has been selected and is no recording.
+    // Note: This check must be *after* a call to setSelectedTrack(...) above.
+    if (isATrackSelected()) {
+      mapOverlay.setShowEndMarker(!isRecordingSelected());
+      mapView.postInvalidate();
+    }
   }
 
   private void readAllNewTrackPoints() {

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

@@ -662,6 +662,11 @@ public class TrackRecordingService extends Service implements LocationListener {
     if (recordingTrack != null) {
       restoreStats(recordingTrack);
       isRecording = true;
+    } else {
+      // Make sure we have consistent state in shared preferences.
+      Log.w(MyTracksConstants.TAG, "TrackRecordingService.onCreate: Resetting "
+          + "an orphaned recording track: " + recordingTrackId);
+      prefManager.setRecordingTrack(recordingTrackId = -1);
     }
     showNotification();
   }

MyTracksTest/src/com/google/android/apps/mytracks/services/TrackRecordingServiceTest.java

@@ -257,6 +257,18 @@ public class TrackRecordingServiceTest
     assertEquals(-1, service.getRecordingTrackId());
   }
 
+  @MediumTest
+  public void testRecording_orphanedRecordingTrack() throws Exception {
+    // Just set recording track to a bogus value.
+    setRecordingTrack(256);
+    
+    // Make sure that the service will not start recording and will clear
+    // the bogus track.
+    ITrackRecordingService service = bindAndGetService(createStartIntent());
+    assertFalse(service.isRecording());
+    assertEquals(-1, service.getRecordingTrackId());
+  }
+  
   @MediumTest
   public void testStartNewTrack_noRecording() throws Exception {
     List<Track> tracks = providerUtils.getAllTracks();
@@ -538,9 +550,12 @@ public class TrackRecordingServiceTest
     assertTrue(track.getId() >= 0);
     providerUtils.insertTrack(track);
     assertEquals(track.getId(), providerUtils.getTrack(track.getId()).getId());
+    setRecordingTrack(isRecording ? track.getId() : -1);
+  }
+  
+  private void setRecordingTrack(long id) {
     Editor editor = sharedPreferences.edit();
-    editor.putLong(context.getString(R.string.recording_track_key),
-        isRecording ? track.getId() : -1);
+    editor.putLong(context.getString(R.string.recording_track_key), id);
     editor.commit();
   }
 }