Improve MyTracksLocationManager thus LocationClient is only started when necessary.

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

@@ -388,7 +388,7 @@ public class SearchListActivity extends AbstractSendToGoogleActivity
     setTitle(textQuery);
 
     final MyTracksLocationManager myTracksLocationManager = new MyTracksLocationManager(
-        this, Looper.myLooper());
+        this, Looper.myLooper(), true);
     LocationListener locationListener = new LocationListener() {
         @Override
       public void onLocationChanged(final Location location) {

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

@@ -478,7 +478,7 @@ public class TrackListActivity extends AbstractSendToGoogleActivity
         return ApiAdapterFactory.getApiAdapter().handleSearchMenuSelection(this);
       case R.id.track_list_start_gps:
         MyTracksLocationManager myTracksLocationManager = new MyTracksLocationManager(
-            this, Looper.myLooper());
+            this, Looper.myLooper(), false);
         if (!myTracksLocationManager.isGpsProviderEnabled()) {
           intent = GoogleLocationUtils.isAvailable(TrackListActivity.this) ? new Intent(
               GoogleLocationUtils.ACTION_GOOGLE_LOCATION_SETTINGS)

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

@@ -167,7 +167,7 @@ public class MyTracksMapFragment extends SupportMapFragment implements TrackData
         @Override
       public void onClick(View v) {
         final MyTracksLocationManager myTracksLocationManager = new MyTracksLocationManager(
-            getActivity(), Looper.myLooper());
+            getActivity(), Looper.myLooper(), true);
         if (!myTracksLocationManager.isAllowed()) {
           String setting = getString(
               GoogleLocationUtils.isAvailable(getActivity()) ? R.string.gps_google_location_settings
@@ -533,7 +533,7 @@ public class MyTracksMapFragment extends SupportMapFragment implements TrackData
         TrackDataType.SAMPLED_OUT_TRACK_POINTS_TABLE, TrackDataType.PREFERENCE));
 
     MyTracksLocationManager myTracksLocationManager = new MyTracksLocationManager(
-        getActivity(), Looper.myLooper());
+        getActivity(), Looper.myLooper(), false);
     boolean isGpsProviderEnabled = myTracksLocationManager.isGpsProviderEnabled();
 
     if (googleMap != null) {

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

@@ -107,10 +107,10 @@ public class MyTracksLocationManager {
   private final Looper looper;
   private final Handler handler;
   private final LocationClient locationClient;
-
   private final LocationManager locationManager;
   private final ContentResolver contentResolver;
   private final GoogleSettingsObserver observer;
+
   private boolean isAvailable;
   private boolean isAllowed;
   private LocationListener requestLastLocation;
@@ -118,15 +118,21 @@ public class MyTracksLocationManager {
   private float requestLocationUpdatesDistance;
   private long requestLocationUpdatesTime;
 
-  public MyTracksLocationManager(Context context, Looper looper) {
+  public MyTracksLocationManager(Context context, Looper looper, boolean enableLocaitonClient) {
     this.looper = looper;
     handler = new Handler(looper);
-    locationClient = new LocationClient(context, connectionCallbacks, onConnectionFailedListener);
+
-    locationClient.connect();
+    if (enableLocaitonClient) {
+      locationClient = new LocationClient(context, connectionCallbacks, onConnectionFailedListener);
+      locationClient.connect();
+    } else {
+      locationClient = null;
+    }
 
     locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
     contentResolver = context.getContentResolver();
     observer = new GoogleSettingsObserver();
+
     isAvailable = GoogleLocationUtils.isAvailable(context);
     isAllowed = isUseLocationForServicesOn();
 
@@ -138,7 +144,9 @@ public class MyTracksLocationManager {
    * Closes the {@link MyTracksLocationManager}.
    */
   public void close() {
-    locationClient.disconnect();
+    if (locationClient != null) {
+      locationClient.disconnect();
+    }
     contentResolver.unregisterContentObserver(observer);
   }
 
@@ -186,7 +194,8 @@ public class MyTracksLocationManager {
   }
 
   /**
-   * Requests location updates.
+   * Requests location updates. This is an ongoing request, thus the caller
+   * needs to check the status of {@link #isAllowed}.
    * 
    * @param minTime the minimal time
    * @param minDistance the minimal distance
@@ -215,7 +224,7 @@ public class MyTracksLocationManager {
         @Override
       public void run() {
         requestLocationUpdates = null;
-        if (locationClient.isConnected()) {
+        if (locationClient != null && locationClient.isConnected()) {
           locationClient.removeLocationUpdates(locationListener);
         }
       }

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

@@ -285,7 +285,7 @@ public class TrackRecordingService extends Service {
     super.onCreate();
     context = this;
     myTracksProviderUtils = MyTracksProviderUtils.Factory.get(this);
-    myTracksLocationManager = new MyTracksLocationManager(this, Looper.myLooper());
+    myTracksLocationManager = new MyTracksLocationManager(this, Looper.myLooper(), true);
     activityRecognitionPendingIntent = PendingIntent.getService(context, 0,
         new Intent(context, ActivityRecognitionIntentService.class),
         PendingIntent.FLAG_UPDATE_CURRENT);