Address Rodrigo's comments.

Add service preference manager.

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

@@ -1240,7 +1240,7 @@ public class MyTracks extends TabActivity implements OnTouchListener,
    * Starts the track recording service (if not already running) and binds to
    * it. Starts recording a new track.
    */
-  protected void startRecording() {
+  public void startRecording() {
     if (trackRecordingService == null) {
       startNewTrackRequested = true;
       Intent startIntent = new Intent(this, TrackRecordingService.class);
@@ -1266,7 +1266,7 @@ public class MyTracks extends TabActivity implements OnTouchListener,
    * Stops the track recording service and unbinds from it. Will display a toast
    * "Stopped recording" and pop up the Track Details activity.
    */
-  protected void stopRecording() {
+  public void stopRecording() {
     if (trackRecordingService != null) {
       try {
         trackRecordingService.endCurrentTrack();
@@ -1325,7 +1325,7 @@ public class MyTracks extends TabActivity implements OnTouchListener,
    *
    * @param trackId the id of the track
    */
-  protected void setSelectedTrack(final long trackId) {
+  public void setSelectedTrack(final long trackId) {
     runOnUiThread(new Runnable() {
       public void run() {
         SharedPreferences prefs =

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

@@ -152,41 +152,7 @@ public class MyTracksMap extends MapActivity
       if (selectedTrack == null) {
         return;
       }
-      Cursor cursor = null;
-      try {
-        cursor = providerUtils.getLocationsCursor(
-            recordingTrackId,
-            lastSeenLocationId + 1,
-            MyTracksConstants.MAX_DISPLAYED_TRACK_POINTS
-                - selectedTrack.getLocations().size(),
-            true);
-        if (cursor != null) {
-          if (cursor.moveToLast()) {
-            final int idColumnIdx =
-                cursor.getColumnIndexOrThrow(TrackPointsColumns._ID);
-            int i = 0;
-            setSamplingFrequency(selectedTrack);
-            do {
-              Location location = providerUtils.createLocation(cursor);
-              if (i % samplingFrequency == 0 ||
-                  MyTracksUtils.isValidLocation(location)) {
-                lastSeenLocationId = cursor.getLong(idColumnIdx);
-                if (location != null) {
-                  mapOverlay.addLocation(location);
-                }
-              }
-              i++;
-            } while (cursor.moveToPrevious());
-          }
-        }
-      } catch (RuntimeException e) {
-        Log.w(MyTracksConstants.TAG, "Caught an unexpected exception: ", e);
-      } finally {
-        if (cursor != null) {
-          cursor.close();
-        }
-        mapView.postInvalidate();
-      }
+      readAllNewTrackPoints();
     }
   };
 
@@ -199,53 +165,9 @@ public class MyTracksMap extends MapActivity
       if (selectedTrack == null) {
         return;
       }
-      Cursor cursor = null;
-      long totalLocations = selectedTrack.getStopId() -
-          selectedTrack.getStartId();
-
       mapOverlay.clearPoints();
       lastSeenLocationId = selectedTrack.getStartId();
-      setSamplingFrequency(selectedTrack);
-      int bufferSize = 1024;
-      try {
-        int points = 0;
-        while (lastSeenLocationId < selectedTrack.getStopId()) {
-          cursor = providerUtils.getLocationsCursor(
-              selectedTrack.getId(), lastSeenLocationId, bufferSize, false);
-          if (cursor != null && cursor.moveToFirst()) {
-	          final int idColumnIdx =
-	              cursor.getColumnIndexOrThrow(TrackPointsColumns._ID);
-	          while (cursor.moveToNext()) {
-	            points++;
-	            Location location = providerUtils.createLocation(cursor);
-	            if (MyTracksUtils.isValidLocation(location)) {
-	              lastSeenLocationId = cursor.getLong(idColumnIdx);
-	              // Include a point if it fits one of the following criteria:
-	              // - Has the mod for the sampling frequency.
-	              // - Is the first point.
-	              // - Is the last point and we are not recording this track.
-	              if (points % samplingFrequency == 0 ||
-	                  points == 0 ||
-	                  (recordingTrackId != selectedTrack.getId() &&
-	                      points == (totalLocations - 1))) {
-	                mapOverlay.addLocation(location);
-	              }
-	            }
-	          }
-          } else {
-            lastSeenLocationId += bufferSize;
-          }
-          cursor.close();
-          cursor = null;
-        }
-      } catch (RuntimeException e) {
-        Log.w(MyTracksConstants.TAG, "Caught unexpected exception.", e);
-      } finally {
-        if (cursor != null) {
-          cursor.close();
-        }
-      }
-      mapView.postInvalidate();
+      readAllNewTrackPoints();
     }
   };
 
@@ -1049,4 +971,48 @@ public class MyTracksMap extends MapActivity
     Log.i(MyTracksConstants.TAG, "Sampling locations: " + samplingFrequency);
 
   }
+  
+  private void readAllNewTrackPoints() {
+    Cursor cursor = null;
+    // Refetch the track to get the latest StopId
+    selectedTrack = providerUtils.getTrack(selectedTrack.getId());
+    long totalLocations = selectedTrack.getStopId() -
+        selectedTrack.getStartId();
+
+    setSamplingFrequency(selectedTrack);
+    int bufferSize = 1024;
+    int points = 0;
+    while (lastSeenLocationId < selectedTrack.getStopId()) {
+      cursor = providerUtils.getLocationsCursor(
+          selectedTrack.getId(), lastSeenLocationId, bufferSize, false);
+      if (cursor != null && cursor.moveToFirst()) {
+        final int idColumnIdx = cursor.getColumnIndexOrThrow(
+            TrackPointsColumns._ID);
+        while (cursor.moveToNext()) {
+          points++;
+          Location location = providerUtils.createLocation(cursor);
+          lastSeenLocationId = cursor.getLong(idColumnIdx);
+          // Include a point if it fits one of the following criteria:
+          // - Has the mod for the sampling frequency.
+          // - Is the first point.
+          // - Is the last point and we are not recording this track.
+          if (!MyTracksUtils.isValidLocation(location) ||
+              points % samplingFrequency == 0 ||
+              points == 0 ||
+              (recordingTrackId != selectedTrack.getId() &&
+                  points == (totalLocations - 1))) {
+            mapOverlay.addLocation(location);
+          }
+        }
+      } else {
+        lastSeenLocationId += bufferSize;
+      }
+      cursor.close();
+      cursor = null;
+    }
+    if (cursor != null) {
+      cursor.close();
+    }
+    mapView.postInvalidate();
+  }
 }

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

@@ -0,0 +1,122 @@
+package com.google.android.apps.mytracks.services;
+
+import android.content.SharedPreferences;
+import android.util.Log;
+
+import com.google.android.apps.mytracks.MyTracksConstants;
+import com.google.android.apps.mytracks.MyTracksSettings;
+import com.google.android.maps.mytracks.R;
+
+public class PreferenceManager {
+  private TrackRecordingService service;
+  private String announcement_frequency_key;
+  private String max_recording_distance_key;
+  private String metric_units_key;
+  private String min_recording_distance_key;
+  private String min_recording_interval_key;
+  private String min_required_accuracy_key;
+  private String signal_sampling_frequency_key;
+  private String split_frequency_key;
+  
+  public PreferenceManager(TrackRecordingService service) {
+    this.service = service;
+    announcement_frequency_key =
+      service.getString(R.string.announcement_frequency_key);
+    max_recording_distance_key = 
+      service.getString(R.string.max_recording_distance_key);
+    metric_units_key =
+      service.getString(R.string.metric_units_key);
+    min_recording_distance_key =
+        service.getString(R.string.min_recording_distance_key);
+    min_recording_interval_key =
+      service.getString(R.string.min_recording_interval_key);
+    min_required_accuracy_key =
+      service.getString(R.string.min_required_accuracy_key);
+    split_frequency_key =
+      service.getString(R.string.split_frequency_key);
+    signal_sampling_frequency_key =
+      service.getString(R.string.signal_sampling_frequency_key);
+  }
+  
+  /**
+   * Notifies that preferences have changed.
+   * Call this with key == null to update all preferences in one call.
+   *
+   * @param key the key that changed (may be null to update all preferences)
+   */
+  public void onSharedPreferenceChanged(String key) {
+    SharedPreferences sharedPreferences =
+        service.getSharedPreferences(MyTracksSettings.SETTINGS_NAME, 0);
+    if (sharedPreferences == null) {
+      Log.w(MyTracksConstants.TAG,
+          "TrackRecordingService: Couldn't get shared preferences.");
+      return;
+    }
+
+    if (key == null || key.equals(min_recording_distance_key)) {
+      service.setMinRecordingDistance(
+          sharedPreferences.getInt(
+              min_recording_distance_key,
+              MyTracksSettings.DEFAULT_MIN_RECORDING_DISTANCE));
+      Log.d(MyTracksConstants.TAG,
+          "TrackRecordingService: minRecordingDistance = "
+          + service.getMinRecordingDistance());
+    }
+    if (key == null || key.equals(max_recording_distance_key)) {
+      service.setMaxRecordingDistance(
+          sharedPreferences.getInt(
+              max_recording_distance_key,
+              MyTracksSettings.DEFAULT_MAX_RECORDING_DISTANCE));
+    }
+    if (key == null || key.equals(min_recording_interval_key)) {
+      int minRecordingInterval = sharedPreferences.getInt(
+          min_recording_interval_key,
+          MyTracksSettings.DEFAULT_MIN_RECORDING_INTERVAL);
+      switch (minRecordingInterval) {
+        case -2:
+          // Battery Miser
+          // min: 30 seconds
+          // max: 5 minutes
+          // minDist: 5 meters Choose battery life over moving time accuracy.
+          service.setLocationListenerPolicy(
+              new AdaptiveLocationListenerPolicy(30000, 300000, 5));
+          break;
+        case -1:
+          // High Accuracy
+          // min: 1 second
+          // max: 30 seconds
+          // minDist: 0 meters get all updates to properly measure moving time.
+          service.setLocationListenerPolicy(
+              new AdaptiveLocationListenerPolicy(1000, 30000, 0));
+          break;
+        default:
+          service.setLocationListenerPolicy(
+              new AbsoluteLocationListenerPolicy(minRecordingInterval * 1000));
+      }
+    }
+    if (key == null || key.equals(min_required_accuracy_key)) {
+      service.setMinRequiredAccuracy(
+          sharedPreferences.getInt(
+              min_required_accuracy_key,
+              MyTracksSettings.DEFAULT_MIN_REQUIRED_ACCURACY));
+    }
+    if (key == null || key.equals(announcement_frequency_key)) {
+      service.setAnnouncementFrequency(
+          sharedPreferences.getInt(announcement_frequency_key,
+              -1));
+    }
+    if (key == null || key.equals(split_frequency_key)) {
+      service.getSplitManager().setSplitFrequency(
+          sharedPreferences.getInt(split_frequency_key, 0));
+    }
+    if (key == null || key.equals(signal_sampling_frequency_key)) {
+      service.getSignalManager().setFrequency(
+          sharedPreferences.getInt(
+              signal_sampling_frequency_key, -1), service);
+    }
+    if (key == null || key.equals(metric_units_key)) {
+      service.getSplitManager().setMetricUnits(sharedPreferences.getBoolean(
+          metric_units_key, true));
+    }
+  }
+}

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

@@ -68,8 +68,6 @@ public class TrackRecordingService extends Service implements LocationListener {
   private LocationManager locationManager;
   private WakeLock wakeLock;
 
-  private int minRecordingInterval =
-      MyTracksSettings.DEFAULT_MIN_RECORDING_INTERVAL;
   private int minRecordingDistance =
       MyTracksSettings.DEFAULT_MIN_RECORDING_DISTANCE;
   private int maxRecordingDistance =
@@ -110,6 +108,8 @@ public class TrackRecordingService extends Service implements LocationListener {
   private TaskExecuterManager signalManager;
   private SplitManager splitManager;
 
+  private PreferenceManager prefManager;
+  
   /**
    * The interval in milliseconds that we have requested to be notified of gps
    * readings.
@@ -626,96 +626,7 @@ public class TrackRecordingService extends Service implements LocationListener {
   public void onSharedPreferenceChanged(String key) {
     Log.d(MyTracksConstants.TAG,
         "TrackRecordingService.onSharedPreferenceChanged");
-    SharedPreferences sharedPreferences =
-        getSharedPreferences(MyTracksSettings.SETTINGS_NAME, 0);
-    if (sharedPreferences == null) {
-      Log.w(MyTracksConstants.TAG,
-          "TrackRecordingService: Couldn't get shared preferences.");
-      return;
-    }
-
-    if (key == null
-        || key.equals(getString(R.string.min_recording_distance_key))) {
-      minRecordingDistance = sharedPreferences.getInt(
-          getString(R.string.min_recording_distance_key),
-          MyTracksSettings.DEFAULT_MIN_RECORDING_DISTANCE);
-      Log.d(MyTracksConstants.TAG,
-          "TrackRecordingService: minRecordingDistance = "
-          + minRecordingDistance);
-    }
-    if (key == null
-        || key.equals(getString(R.string.max_recording_distance_key))) {
-      maxRecordingDistance = sharedPreferences.getInt(
-          getString(R.string.max_recording_distance_key),
-          MyTracksSettings.DEFAULT_MAX_RECORDING_DISTANCE);
-    }
-    if (key == null
-        || key.equals(getString(R.string.min_recording_interval_key))) {
-      minRecordingInterval = sharedPreferences.getInt(
-          getString(R.string.min_recording_interval_key),
-          MyTracksSettings.DEFAULT_MIN_RECORDING_INTERVAL);
-      switch (minRecordingInterval) {
-        case -2:
-          // Battery Miser
-          // min: 30 seconds
-          // max: 5 minutes
-          // minDist: 5 meters Choose battery life over moving time accuracy.
-          locationListenerPolicy =
-              new AdaptiveLocationListenerPolicy(30000, 300000, 5);
-          break;
-        case -1:
-          // High Accuracy
-          // min: 1 second
-          // max: 30 seconds
-          // minDist: 0 meters get all updates to properly measure moving time.
-          locationListenerPolicy =
-              new AdaptiveLocationListenerPolicy(1000, 30000, 0);
-          break;
-        default:
-          locationListenerPolicy =
-              new AbsoluteLocationListenerPolicy(minRecordingInterval * 1000);
-      }
-    }
-    if (key == null
-        || key.equals(getString(R.string.min_required_accuracy_key))) {
-      minRequiredAccuracy = sharedPreferences.getInt(
-          getString(R.string.min_required_accuracy_key),
-          MyTracksSettings.DEFAULT_MIN_REQUIRED_ACCURACY);
-    }
-    if (key == null
-        || key.equals(getString(R.string.announcement_frequency_key))) {
-      announcementFrequency =
-          sharedPreferences.getInt(getString(R.string.announcement_frequency_key),
-              -1);
-      if (mTTSAvailable) {
-        if (announcementFrequency == -1) {
-          if (executer != null) {
-            executer.shutdown();
-            executer = null;
-          }
-        } else {
-          if (executer == null) {
-            SafeStatusAnnouncerTask announcer =
-                new SafeStatusAnnouncerTask(this);
-            executer = new PeriodicTaskExecuter(announcer, this);
-          }
-          executer.scheduleTask(announcementFrequency * 60000);
-        }
-      }
-    }
-    if (key == null || key.equals(getString(R.string.split_frequency_key))) {
-      splitManager.setSplitFrequency(
-          sharedPreferences.getInt(getString(R.string.split_frequency_key), 0));
-    }
-    if (key == null
-        || key.equals(getString(R.string.signal_sampling_frequency_key))) {
-      signalManager.setFrequency(sharedPreferences.getInt(
-          getString(R.string.signal_sampling_frequency_key), -1), this);
-    }
-    if (key == null || key.equals(getString(R.string.metric_units_key))) {
-      splitManager.setMetricUnits(sharedPreferences.getBoolean(
-          getString(R.string.metric_units_key), true));
-    }
+    prefManager.onSharedPreferenceChanged(key);
 
     if (isRecording) {
       registerLocationListener();
@@ -748,6 +659,7 @@ public class TrackRecordingService extends Service implements LocationListener {
       signalManager =
           new TaskExecuterManager(-1, new SignalStrengthTask(this), this);
     }
+    prefManager = new PreferenceManager(this);
     onSharedPreferenceChanged(null);
     restoreStats();
     registerLocationListener();
@@ -983,4 +895,68 @@ public class TrackRecordingService extends Service implements LocationListener {
   long getRecordingTrackId() {
     return recordingTrackId;
   }
+
+  public int getAnnouncementFrequency() {
+    return announcementFrequency;
+  }
+
+  public void setAnnouncementFrequency(int announcementFrequency) {
+    this.announcementFrequency = announcementFrequency;
+    if (mTTSAvailable) {
+      if (announcementFrequency == -1) {
+        if (executer != null) {
+          executer.shutdown();
+          executer = null;
+        }
+      } else {
+        if (executer == null) {
+          SafeStatusAnnouncerTask announcer =
+              new SafeStatusAnnouncerTask(this);
+          executer = new PeriodicTaskExecuter(announcer, this);
+        }
+        executer.scheduleTask(announcementFrequency * 60000);
+      }
+    }
+  }
+
+  public int getMaxRecordingDistance() {
+    return maxRecordingDistance;
+  }
+
+  public void setMaxRecordingDistance(int maxRecordingDistance) {
+    this.maxRecordingDistance = maxRecordingDistance;
+  }
+
+  public int getMinRecordingDistance() {
+    return minRecordingDistance;
+  }
+
+  public void setMinRecordingDistance(int minRecordingDistance) {
+    this.minRecordingDistance = minRecordingDistance;
+  }
+
+  public int getMinRequiredAccuracy() {
+    return minRequiredAccuracy;
+  }
+
+  public void setMinRequiredAccuracy(int minRequiredAccuracy) {
+    this.minRequiredAccuracy = minRequiredAccuracy;
+  }
+
+  public LocationListenerPolicy getLocationListenerPolicy() {
+    return locationListenerPolicy;
+  }
+
+  public void setLocationListenerPolicy(
+      LocationListenerPolicy locationListenerPolicy) {
+    this.locationListenerPolicy = locationListenerPolicy;
+  }
+
+  public SplitManager getSplitManager() {
+    return splitManager;
+  }
+
+  public TaskExecuterManager getSignalManager() {
+    return signalManager;
+  }
 }