Add PreferencesUtils to access

- recording track id
- selected track id

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

@@ -21,11 +21,11 @@ import com.google.android.apps.mytracks.content.TracksColumns;
 import com.google.android.apps.mytracks.io.file.TrackWriter;
 import com.google.android.apps.mytracks.io.file.TrackWriterFactory;
 import com.google.android.apps.mytracks.io.file.TrackWriterFactory.TrackFileFormat;
+import com.google.android.apps.mytracks.util.PreferencesUtils;
 import com.google.android.apps.mytracks.util.SystemUtils;
 import com.google.android.maps.mytracks.R;
 
 import android.content.Context;
-import android.content.SharedPreferences;
 import android.database.Cursor;
 import android.os.AsyncTask;
 import android.os.PowerManager.WakeLock;
@@ -65,13 +65,8 @@ public class ExportAsyncTask extends AsyncTask<Void, Integer, Boolean> {
     context = exportActivity.getApplicationContext();
     myTracksProviderUtils = MyTracksProviderUtils.Factory.get(exportActivity);
 
-    SharedPreferences sharedPreferences = exportActivity.getSharedPreferences(
-        Constants.SETTINGS_NAME, Context.MODE_PRIVATE);
-    long recordingTrackId = sharedPreferences.getLong(
-        exportActivity.getString(R.string.recording_track_key), -1L);
-
     // Get the wake lock if not recording
-    if (recordingTrackId == -1L) {
+    if (PreferencesUtils.getRecordingTrackId(exportActivity) == -1L) {
       wakeLock = SystemUtils.acquireWakeLock(exportActivity, wakeLock);
     }
     success = false;

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

@@ -19,11 +19,9 @@ package com.google.android.apps.mytracks;
 import com.google.android.apps.mytracks.content.MyTracksProviderUtils;
 import com.google.android.apps.mytracks.io.file.GpxImporter;
 import com.google.android.apps.mytracks.util.FileUtils;
+import com.google.android.apps.mytracks.util.PreferencesUtils;
 import com.google.android.apps.mytracks.util.SystemUtils;
-import com.google.android.maps.mytracks.R;
 
-import android.content.Context;
-import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.os.PowerManager.WakeLock;
 import android.util.Log;
@@ -82,13 +80,9 @@ public class ImportAsyncTask extends AsyncTask<Void, Integer, Boolean> {
     this.path = path;
 
     myTracksProviderUtils = MyTracksProviderUtils.Factory.get(importActivity);
-    SharedPreferences sharedPreferences = importActivity.getSharedPreferences(
-        Constants.SETTINGS_NAME, Context.MODE_PRIVATE);
-    long recordingTrackId = sharedPreferences.getLong(
-        importActivity.getString(R.string.recording_track_key), -1L);
 
     // Get the wake lock if not recording
-    if (recordingTrackId == -1L) {
+    if (PreferencesUtils.getRecordingTrackId(importActivity) == -1L) {
       wakeLock = SystemUtils.acquireWakeLock(importActivity, wakeLock);
     }
 

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

@@ -24,6 +24,7 @@ import com.google.android.apps.mytracks.services.sensors.ant.AntUtils;
 import com.google.android.apps.mytracks.util.ApiAdapterFactory;
 import com.google.android.apps.mytracks.util.BluetoothDeviceUtils;
 import com.google.android.apps.mytracks.util.DialogUtils;
+import com.google.android.apps.mytracks.util.PreferencesUtils;
 import com.google.android.apps.mytracks.util.UnitConversions;
 import com.google.android.maps.mytracks.R;
 
@@ -345,8 +346,7 @@ public class SettingsActivity extends PreferenceActivity {
 
     // If recording, disable backup/restore/reset
     // (we don't want to get to inconsistent states)
-    boolean recording =
-        preferences.getLong(getString(R.string.recording_track_key), -1) != -1;
+    boolean recording = PreferencesUtils.getRecordingTrackId(this) != -1;
     backupNowPreference.setEnabled(!recording);
     restoreNowPreference.setEnabled(!recording);
     resetPreference.setEnabled(!recording);

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

@@ -37,6 +37,7 @@ import com.google.android.apps.mytracks.services.ServiceUtils;
 import com.google.android.apps.mytracks.services.TrackRecordingServiceConnection;
 import com.google.android.apps.mytracks.util.AnalyticsUtils;
 import com.google.android.apps.mytracks.util.ApiAdapterFactory;
+import com.google.android.apps.mytracks.util.PreferencesUtils;
 import com.google.android.maps.mytracks.R;
 
 import android.content.Context;
@@ -102,7 +103,7 @@ public class TrackDetailActivity extends FragmentActivity {
     @Override
     public void onSharedPreferenceChanged(SharedPreferences preferences, String key) {
       // Note that key can be null
-      if (getString(R.string.recording_track_key).equals(key)) {
+      if (PreferencesUtils.getRecordingTrackIdKey(TrackDetailActivity.this).equals(key)) {
         updateMenu();      
       }
     }
@@ -446,8 +447,7 @@ public class TrackDetailActivity extends FragmentActivity {
    * Updates the menu.
    */
   private void updateMenu() {
-    updateMenuItems(
-        trackId == sharedPreferences.getLong(getString(R.string.recording_track_key), -1L));
+    updateMenuItems(trackId == PreferencesUtils.getRecordingTrackId(this));
   }
 
   /**
@@ -508,8 +508,7 @@ public class TrackDetailActivity extends FragmentActivity {
    * Returns true if recording.
    */
   private boolean isRecording() {
-    return ServiceUtils.isRecording(
-        this, trackRecordingServiceConnection.getServiceIfBound(), sharedPreferences);
+    return ServiceUtils.isRecording(this, trackRecordingServiceConnection.getServiceIfBound());
   }
 
   /**
@@ -528,7 +527,7 @@ public class TrackDetailActivity extends FragmentActivity {
     }
     trackRecordingServiceConnection.stop();
 
-    long recordingTrackId = sharedPreferences.getLong(getString(R.string.recording_track_key), -1L);
+    long recordingTrackId = PreferencesUtils.getRecordingTrackId(this);
     if (recordingTrackId != -1L) {
       Intent intent = new Intent(this, TrackEditActivity.class)
           .putExtra(TrackEditActivity.EXTRA_SHOW_CANCEL, false)

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

@@ -26,6 +26,7 @@ import com.google.android.apps.mytracks.services.ServiceUtils;
 import com.google.android.apps.mytracks.services.TrackRecordingServiceConnection;
 import com.google.android.apps.mytracks.util.ApiAdapterFactory;
 import com.google.android.apps.mytracks.util.EulaUtils;
+import com.google.android.apps.mytracks.util.PreferencesUtils;
 import com.google.android.apps.mytracks.util.StringUtils;
 import com.google.android.maps.mytracks.R;
 
@@ -115,8 +116,8 @@ public class TrackListActivity extends FragmentActivity {
       if (getString(R.string.metric_units_key).equals(key)) {
         metricUnits = preferences.getBoolean(getString(R.string.metric_units_key), true);
       }
-      if (getString(R.string.recording_track_key).equals(key)) {
-        recordingTrackId = sharedPreferences.getLong(getString(R.string.recording_track_key), -1L);
+      if (PreferencesUtils.getRecordingTrackIdKey(TrackListActivity.this).equals(key)) {
+        recordingTrackId = PreferencesUtils.getRecordingTrackId(TrackListActivity.this);
         if (isRecording()) {
           trackRecordingServiceConnection.startAndBind();
         }
@@ -136,7 +137,6 @@ public class TrackListActivity extends FragmentActivity {
   };
   
   private TrackRecordingServiceConnection trackRecordingServiceConnection;
-  private SharedPreferences sharedPreferences;
   private boolean metricUnits;
   private long recordingTrackId;
   private ListView listView;
@@ -162,10 +162,11 @@ public class TrackListActivity extends FragmentActivity {
     trackRecordingServiceConnection = new TrackRecordingServiceConnection(
         this, bindChangedCallback);
 
-    sharedPreferences = getSharedPreferences(Constants.SETTINGS_NAME, Context.MODE_PRIVATE);
+    SharedPreferences sharedPreferences = getSharedPreferences(
+        Constants.SETTINGS_NAME, Context.MODE_PRIVATE);
     sharedPreferences.registerOnSharedPreferenceChangeListener(sharedPreferenceChangeListener);
     metricUnits = sharedPreferences.getBoolean(getString(R.string.metric_units_key), true);
-    recordingTrackId = sharedPreferences.getLong(getString(R.string.recording_track_key), -1L);
+    recordingTrackId = PreferencesUtils.getRecordingTrackId(this);
 
     listView = (ListView) findViewById(R.id.track_list);
     listView.setOnItemClickListener(new OnItemClickListener() {
@@ -421,8 +422,7 @@ public class TrackListActivity extends FragmentActivity {
    * Returns true if recording.
    */
   private boolean isRecording() {
-    return ServiceUtils.isRecording(
-        this, trackRecordingServiceConnection.getServiceIfBound(), sharedPreferences);
+    return ServiceUtils.isRecording(this, trackRecordingServiceConnection.getServiceIfBound());
   }
 
   /**

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

@@ -25,15 +25,14 @@ import com.google.android.apps.mytracks.content.WaypointsColumns;
 import com.google.android.apps.mytracks.services.ITrackRecordingService;
 import com.google.android.apps.mytracks.services.TrackRecordingServiceConnection;
 import com.google.android.apps.mytracks.util.DialogUtils;
+import com.google.android.apps.mytracks.util.PreferencesUtils;
 import com.google.android.apps.mytracks.util.StringUtils;
 import com.google.android.maps.mytracks.R;
 
 import android.app.Dialog;
 import android.app.ListActivity;
-import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.database.Cursor;
 import android.os.Bundle;
 import android.os.RemoteException;
@@ -156,19 +155,11 @@ public class WaypointsList extends ListActivity implements View.OnClickListener
     insertStatisticsButton =
         (Button) findViewById(R.id.waypointslist_btn_insert_statistics);
     insertStatisticsButton.setOnClickListener(this);
-    SharedPreferences preferences = getSharedPreferences(
-        Constants.SETTINGS_NAME, Context.MODE_PRIVATE);
 
-    // TODO: Get rid of selected and recording track IDs
-    long selectedTrackId = -1;
-    if (preferences != null) {
-      recordingTrackId =
-          preferences.getLong(getString(R.string.recording_track_key), -1);
-      selectedTrackId =
-          preferences.getLong(getString(R.string.selected_track_key), -1);
-    }
-    boolean selectedRecording = selectedTrackId > 0
-        && selectedTrackId == recordingTrackId;
+    recordingTrackId = PreferencesUtils.getRecordingTrackId(this);
+
+    long selectedTrackId = PreferencesUtils.getSelectedTrackId(this);
+    boolean selectedRecording = selectedTrackId != -1L && selectedTrackId == recordingTrackId;
     insertWaypointButton.setEnabled(selectedRecording);
     insertStatisticsButton.setEnabled(selectedRecording);
 

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

@@ -28,8 +28,8 @@ import com.google.android.apps.mytracks.content.MyTracksProviderUtils.DoubleBuff
 import com.google.android.apps.mytracks.content.MyTracksProviderUtils.LocationIterator;
 import com.google.android.apps.mytracks.content.TrackDataListener.ProviderState;
 import com.google.android.apps.mytracks.content.TrackDataListeners.ListenerRegistration;
-import com.google.android.apps.mytracks.util.ApiAdapterFactory;
 import com.google.android.apps.mytracks.util.LocationUtils;
+import com.google.android.apps.mytracks.util.PreferencesUtils;
 import com.google.android.maps.mytracks.R;
 
 import android.content.Context;
@@ -59,8 +59,6 @@ import java.util.Set;
 public class TrackDataHub {
 
   // Preference keys
-  private final String SELECTED_TRACK_KEY;
-  private final String RECORDING_TRACK_KEY;
   private final String MIN_REQUIRED_ACCURACY_KEY;
   private final String METRIC_UNITS_KEY;
   private final String SPEED_REPORTING_KEY;
@@ -223,8 +221,6 @@ public class TrackDataHub {
     this.targetNumPoints = targetNumPoints;
     this.locationFactory = new DoubleBufferedLocationFactory();
 
-    SELECTED_TRACK_KEY = context.getString(R.string.selected_track_key);
-    RECORDING_TRACK_KEY = context.getString(R.string.recording_track_key);
     MIN_REQUIRED_ACCURACY_KEY = context.getString(R.string.min_required_accuracy_key);
     METRIC_UNITS_KEY = context.getString(R.string.metric_units_key);
     SPEED_REPORTING_KEY = context.getString(R.string.report_speed_key);
@@ -302,7 +298,7 @@ public class TrackDataHub {
   }
 
   private void loadSharedPreferences() {
-    selectedTrackId = preferences.getLong(SELECTED_TRACK_KEY, -1);
+    selectedTrackId = PreferencesUtils.getSelectedTrackId(context);
     useMetricUnits = preferences.getBoolean(METRIC_UNITS_KEY, true);
     reportSpeed = preferences.getBoolean(SPEED_REPORTING_KEY, true);
     minRequiredAccuracy = preferences.getInt(MIN_REQUIRED_ACCURACY_KEY,
@@ -380,8 +376,8 @@ public class TrackDataHub {
     if (!isStarted()) {
       loadSharedPreferences();
     }
-    long recordingTrackId = preferences.getLong(RECORDING_TRACK_KEY, -1);
-    return recordingTrackId > 0 && recordingTrackId == selectedTrackId;
+    long recordingTrackId = PreferencesUtils.getRecordingTrackId(context);
+    return recordingTrackId != -1L && recordingTrackId == selectedTrackId;
   }
 
   /**
@@ -399,8 +395,7 @@ public class TrackDataHub {
 
     // Save the selection to memory and flush.
     selectedTrackId = trackId;
-    ApiAdapterFactory.getApiAdapter().applyPreferenceChanges(
-        preferences.edit().putLong(SELECTED_TRACK_KEY, trackId));
+    PreferencesUtils.setSelectedTrackId(context, selectedTrackId);
 
     // Force it to reload data from the beginning.
     Log.d(TAG, "Loading track");
@@ -627,9 +622,8 @@ public class TrackDataHub {
     } else if (SPEED_REPORTING_KEY.equals(key)) {
       reportSpeed = preferences.getBoolean(SPEED_REPORTING_KEY, true);
       notifySpeedReportingChanged();
-    } else if (SELECTED_TRACK_KEY.equals(key)) {
-      long trackId = preferences.getLong(SELECTED_TRACK_KEY, -1);
-      loadTrack(trackId);
+    } else if (PreferencesUtils.getSelectedTrackIdKey(context).equals(key)) {
+      loadTrack(PreferencesUtils.getSelectedTrackId(context));
     }
   }
 

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

@@ -16,7 +16,6 @@
 
 package com.google.android.apps.mytracks.fragments;
 
-import com.google.android.apps.mytracks.Constants;
 import com.google.android.apps.mytracks.MyTracksApplication;
 import com.google.android.apps.mytracks.StatsUtilities;
 import com.google.android.apps.mytracks.content.Track;
@@ -28,8 +27,6 @@ import com.google.android.apps.mytracks.services.ServiceUtils;
 import com.google.android.apps.mytracks.util.UnitConversions;
 import com.google.android.maps.mytracks.R;
 
-import android.content.Context;
-import android.content.SharedPreferences;
 import android.location.Location;
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
@@ -51,7 +48,6 @@ public class StatsFragment extends Fragment implements TrackDataListener {
 
   private static final String TAG = StatsFragment.class.getSimpleName();
 
-  private SharedPreferences sharedPreferences;
   private StatsUtilities statsUtilities;
   private TrackDataHub trackDataHub;
   private UiUpdateThread uiUpdateThread;
@@ -76,7 +72,7 @@ public class StatsFragment extends Fragment implements TrackDataListener {
     @Override
     public void run() {
       Log.d(TAG, "UI update thread started");
-      while (ServiceUtils.isRecording(getActivity(), null, sharedPreferences)) {
+      while (ServiceUtils.isRecording(getActivity(), null)) {
         getActivity().runOnUiThread(updateTotalTime);
         try {
           Thread.sleep(1000L);
@@ -92,8 +88,6 @@ public class StatsFragment extends Fragment implements TrackDataListener {
   @Override
   public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
-    sharedPreferences = getActivity()
-        .getSharedPreferences(Constants.SETTINGS_NAME, Context.MODE_PRIVATE);
     statsUtilities = new StatsUtilities(getActivity());
   }
 

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

@@ -21,6 +21,7 @@ import com.google.android.apps.mytracks.Constants;
 import com.google.android.apps.mytracks.content.MyTracksProviderUtils;
 import com.google.android.apps.mytracks.content.Track;
 import com.google.android.apps.mytracks.stats.TripStatistics;
+import com.google.android.apps.mytracks.util.PreferencesUtils;
 import com.google.android.apps.mytracks.util.UnitConversions;
 import com.google.android.maps.mytracks.R;
 import com.google.common.annotations.VisibleForTesting;
@@ -112,14 +113,12 @@ public class DynamicSpeedTrackPathDescriptor implements TrackPathDescriptor,
 
   @Override
   public boolean needsRedraw() {
-    SharedPreferences prefs = context.getSharedPreferences(Constants.SETTINGS_NAME,
-        Context.MODE_PRIVATE);
-    long currentTrackId = prefs.getLong(context.getString(R.string.selected_track_key), -1);
-    if (currentTrackId == -1) {
+    long selectedTrackId = PreferencesUtils.getSelectedTrackId(context);
+    if (selectedTrackId == -1L) {
       // Could not find track.
       return false;
     }
-    Track track = MyTracksProviderUtils.Factory.get(context).getTrack(currentTrackId);
+    Track track = MyTracksProviderUtils.Factory.get(context).getTrack(selectedTrackId);
     TripStatistics stats = track.getStatistics();
     double newAverageMovingSpeed = (int) Math.floor(
         stats.getAverageMovingSpeed() * UnitConversions.MS_TO_KMH);

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

@@ -17,6 +17,7 @@ package com.google.android.apps.mytracks.services;
 
 import com.google.android.apps.mytracks.Constants;
 import com.google.android.apps.mytracks.util.ApiAdapterFactory;
+import com.google.android.apps.mytracks.util.PreferencesUtils;
 import com.google.android.maps.mytracks.R;
 
 import android.content.Context;
@@ -41,8 +42,6 @@ public class PreferenceManager implements OnSharedPreferenceChangeListener {
   private final String minRecordingDistanceKey;
   private final String minRecordingIntervalKey;
   private final String minRequiredAccuracyKey;
-  private final String recordingTrackKey;
-  private final String selectedTrackKey;
   private final String splitFrequencyKey;
 
   public PreferenceManager(TrackRecordingService service) {
@@ -72,10 +71,6 @@ public class PreferenceManager implements OnSharedPreferenceChangeListener {
         service.getString(R.string.min_recording_interval_key);
     minRequiredAccuracyKey =
         service.getString(R.string.min_required_accuracy_key);
-    recordingTrackKey =
-        service.getString(R.string.recording_track_key);
-    selectedTrackKey =
-        service.getString(R.string.selected_track_key);
     splitFrequencyKey =
         service.getString(R.string.split_frequency_key);
 
@@ -152,12 +147,12 @@ public class PreferenceManager implements OnSharedPreferenceChangeListener {
           autoResumeTrackTimeoutKey,
           Constants.DEFAULT_AUTO_RESUME_TRACK_TIMEOUT));
     }
-    if (key == null || key.equals(recordingTrackKey)) {
-      long recordingTrackId = sharedPreferences.getLong(recordingTrackKey, -1);
+    if (key == null || key.equals(PreferencesUtils.getRecordingTrackIdKey(service))) {
+      long recordingTrackId = PreferencesUtils.getRecordingTrackId(service);
       // Only read the id if it is valid.
       // Setting it to -1 should only happen in
       // TrackRecordingService.endCurrentTrack()
-      if (recordingTrackId > 0) {
+      if (recordingTrackId != -1L) {
         service.setRecordingTrackId(recordingTrackId);
       }
     }
@@ -177,18 +172,6 @@ public class PreferenceManager implements OnSharedPreferenceChangeListener {
     ApiAdapterFactory.getApiAdapter().applyPreferenceChanges(editor);
   }
 
-  public void setRecordingTrack(long id) {
-    Editor editor = sharedPreferences.edit();
-    editor.putLong(recordingTrackKey, id);
-    ApiAdapterFactory.getApiAdapter().applyPreferenceChanges(editor);    
-  }
-
-  public void setSelectedTrack(long id) {
-    Editor editor = sharedPreferences.edit();
-    editor.putLong(selectedTrackKey, id);
-    ApiAdapterFactory.getApiAdapter().applyPreferenceChanges(editor);    
-  }
-
   public void shutdown() {
     sharedPreferences.unregisterOnSharedPreferenceChangeListener(this);
     service = null;

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

@@ -17,14 +17,12 @@ package com.google.android.apps.mytracks.services;
 
 import static com.google.android.apps.mytracks.Constants.TAG;
 
-import com.google.android.apps.mytracks.Constants;
-import com.google.android.maps.mytracks.R;
+import com.google.android.apps.mytracks.util.PreferencesUtils;
 
 import android.app.ActivityManager;
 import android.app.ActivityManager.RunningServiceInfo;
 import android.content.ComponentName;
 import android.content.Context;
-import android.content.SharedPreferences;
 import android.os.RemoteException;
 import android.util.Log;
 
@@ -38,16 +36,16 @@ import java.util.List;
 public class ServiceUtils {
 
   /**
-   * Checks whether we're currently recording.
-   * The checking is done by calling the service, if provided, or alternatively by reading
-   * recording state saved to preferences.
-   *
-   * @param ctx the current context
+   * Checks whether we're currently recording. The checking is done by calling
+   * the service, if provided, or alternatively by reading recording state saved
+   * to preferences.
+   * 
+   * @param context the current context
    * @param service the service, or null if not bound to it
-   * @param preferences the preferences, or null if not available
-   * @return true if the service is recording (or supposed to be recording), false otherwise
+   * @return true if the service is recording (or supposed to be recording),
+   *         false otherwise
    */
-  public static boolean isRecording(Context ctx, ITrackRecordingService service, SharedPreferences preferences) {
+  public static boolean isRecording(Context context, ITrackRecordingService service) {
     if (service != null) {
       try {
         return service.isRecording();
@@ -57,11 +55,7 @@ public class ServiceUtils {
         Log.e(TAG, "Failed to check if service is recording", e);
       }
     }
-
-    if (preferences == null) {
-      preferences = ctx.getSharedPreferences(Constants.SETTINGS_NAME, Context.MODE_PRIVATE);
-    }
-    return preferences.getLong(ctx.getString(R.string.recording_track_key), -1) > 0;
+    return PreferencesUtils.getRecordingTrackId(context) != -1L;
   }
 
   /**

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

@@ -39,6 +39,7 @@ import com.google.android.apps.mytracks.services.tasks.StatusAnnouncerFactory;
 import com.google.android.apps.mytracks.stats.TripStatistics;
 import com.google.android.apps.mytracks.stats.TripStatisticsBuilder;
 import com.google.android.apps.mytracks.util.LocationUtils;
+import com.google.android.apps.mytracks.util.PreferencesUtils;
 import com.google.android.maps.mytracks.R;
 import com.google.common.annotations.VisibleForTesting;
 
@@ -263,12 +264,13 @@ public class TrackRecordingService extends Service {
       restoreStats(recordingTrack);
       isRecording = true;
     } else {
-      if (recordingTrackId != -1) {
+      if (recordingTrackId != -1L) {
         // Make sure we have consistent state in shared preferences.
         Log.w(TAG, "TrackRecordingService.onCreate: "
             + "Resetting an orphaned recording track = " + recordingTrackId);
       }
-      prefManager.setRecordingTrack(recordingTrackId = -1);
+      recordingTrackId = -1L;
+      PreferencesUtils.setRecordingTrackId(this, recordingTrackId);
     }
     showNotification();
   }
@@ -324,7 +326,8 @@ public class TrackRecordingService extends Service {
           "TrackRecordingService: Not resuming, because the previous track ("
           + recordingTrack + ") doesn't exist or is too old");
       isRecording = false;
-      prefManager.setRecordingTrack(recordingTrackId = -1);
+      recordingTrackId = -1L;
+      PreferencesUtils.setRecordingTrackId(this, recordingTrackId);
       stopSelfResult(startId);
       return;
     }
@@ -609,7 +612,7 @@ public class TrackRecordingService extends Service {
     // Reset the number of auto-resume retries.
     setAutoResumeTrackRetries(0);
     // Persist the current recording track.
-    prefManager.setRecordingTrack(recordingTrackId);
+    PreferencesUtils.setRecordingTrackId(this, recordingTrackId);
 
     // Notify the world that we're now recording.
     sendTrackBroadcast(
@@ -1035,7 +1038,8 @@ public class TrackRecordingService extends Service {
     }
     showNotification();
     long recordedTrackId = recordingTrackId;
-    prefManager.setRecordingTrack(recordingTrackId = -1);
+    recordingTrackId = -1L;
+    PreferencesUtils.setRecordingTrackId(this, recordingTrackId);
 
     if (sensorManager != null) {
       SensorManagerFactory.getInstance().releaseSensorManager(sensorManager);

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

@@ -0,0 +1,127 @@
+/*
+ * Copyright 2012 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.util;
+
+import com.google.android.apps.mytracks.Constants;
+import com.google.android.maps.mytracks.R;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.Editor;
+
+/**
+ * Utilities to access preferences stored in {@link SharedPreferences}.
+ * 
+ * @author Jimmy Shih
+ */
+public class PreferencesUtils {
+
+  private PreferencesUtils() {}
+
+  /**
+   * Gets the recording track id key.
+   * 
+   * @param context the context
+   */
+  public static String getRecordingTrackIdKey(Context context) {
+    return getKey(context, R.string.recording_track_id_key);
+  }
+
+  /**
+   * Gets the recording track id.
+   * 
+   * @param context the context
+   */
+  public static long getRecordingTrackId(Context context) {
+    return getLong(context, R.string.recording_track_id_key);
+  }
+
+  /**
+   * Sets the recording track id.
+   * 
+   * @param context the context
+   * @param trackId the track id
+   */
+  public static void setRecordingTrackId(Context context, long trackId) {
+    setLong(context, R.string.recording_track_id_key, trackId);
+  }
+
+  /**
+   * Gets the selected track id key.
+   * 
+   * @param context the context
+   */
+  public static String getSelectedTrackIdKey(Context context) {
+    return getKey(context, R.string.selected_track_id_key);
+  }
+
+  /**
+   * Gets the selected track id.
+   * 
+   * @param context the context
+   */
+  public static long getSelectedTrackId(Context context) {
+    return getLong(context, R.string.selected_track_id_key);
+  }
+
+  /**
+   * Sets the selected track id.
+   * 
+   * @param context the context
+   * @param trackId the track id
+   */
+  public static void setSelectedTrackId(Context context, long trackId) {
+    setLong(context, R.string.selected_track_id_key, trackId);
+  }
+
+  /**
+   * Gets a preference key
+   * 
+   * @param context the context
+   * @param keyId the key id
+   */
+  private static String getKey(Context context, int keyId) {
+    return context.getString(keyId);
+  }
+
+  /**
+   * Gets a long preference value.
+   * 
+   * @param context the context
+   * @param keyId the key id
+   */
+  private static long getLong(Context context, int keyId) {
+    SharedPreferences sharedPreferences = context.getSharedPreferences(
+        Constants.SETTINGS_NAME, Context.MODE_PRIVATE);
+    return sharedPreferences.getLong(getKey(context, keyId), -1L);
+  }
+
+  /**
+   * Sets a long preference value.
+   * 
+   * @param context the context
+   * @param keyId the key id
+   * @param value the value
+   */
+  private static void setLong(Context context, int keyId, long value) {
+    SharedPreferences sharedPreferences = context.getSharedPreferences(
+        Constants.SETTINGS_NAME, Context.MODE_PRIVATE);
+    Editor editor = sharedPreferences.edit();
+    editor.putLong(getKey(context, keyId), value);
+    ApiAdapterFactory.getApiAdapter().applyPreferenceChanges(editor);
+  }
+}

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

@@ -25,6 +25,7 @@ import com.google.android.apps.mytracks.content.Track;
 import com.google.android.apps.mytracks.content.TracksColumns;
 import com.google.android.apps.mytracks.services.ControlRecordingService;
 import com.google.android.apps.mytracks.stats.TripStatistics;
+import com.google.android.apps.mytracks.util.PreferencesUtils;
 import com.google.android.apps.mytracks.util.StringUtils;
 import com.google.android.maps.mytracks.R;
 
@@ -235,9 +236,8 @@ public class TrackWidgetProvider
       reportSpeed = prefs.getBoolean(reportSpeedKey, true);
     }
 
-    String selectedTrackKey = context.getString(R.string.selected_track_key);
-    if (key == null || key.equals(selectedTrackKey)) {
-      selectedTrackId = prefs.getLong(selectedTrackKey, -1);
+    if (key == null || key.equals(PreferencesUtils.getSelectedTrackIdKey(context))) {
+      selectedTrackId = PreferencesUtils.getSelectedTrackId(context);
       Log.d(TAG, "TrackWidgetProvider setting selecting track from preference: " + selectedTrackId);
     }
   }