Merge with 25704964a526fcfe09919af8f29c1e526b5409ec

2026-10-02 17:43:06 +02:00 · 2010-10-04 16:34:38 -07:00
parent 256dac3a82
commit 34bb467b97
55 changed files with 942 additions and 486 deletions
@@ -1,4 +1,4 @@
-#Thu Aug 12 18:54:52 BRT 2010
+#Wed Sep 29 18:44:16 BRT 2010
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
@@ -56,8 +56,11 @@
    <activity android:name="com.google.android.apps.mytracks.MyTracksSettings"
              android:label="@string/mytracks_settings" />

+    <activity android:name="com.google.android.apps.mytracks.AggregatedStatsActivity"
+              android:label="@string/aggregated_stats" />
+
    <activity android:name="com.google.android.apps.mytracks.StatsActivity"
-              android:label="@string/statistics"/>
+              android:label="@string/statistics" />

    <activity android:name="com.google.android.apps.mytracks.ChartActivity"
              android:label="@string/elevation_label"/>
@@ -17,11 +17,11 @@ limitations under the License.
 <selector xmlns:android="http://schemas.android.com/apk/res/android">

  <item android:state_window_focused="false"
-      android:drawable="@drawable/btn_arrow_left_default" />
+        android:drawable="@drawable/left_arrow_chart" />

  <item android:state_pressed="true"
-      android:drawable="@drawable/btn_arrow_left_press" />
+        android:drawable="@drawable/left_arrow_chart_press" />

-  <item android:drawable="@drawable/btn_arrow_left_default" />
+  <item android:drawable="@drawable/left_arrow_chart" />

 </selector>
@@ -17,11 +17,11 @@ limitations under the License.
 <selector xmlns:android="http://schemas.android.com/apk/res/android">

  <item android:state_window_focused="false"
-      android:drawable="@drawable/btn_arrow_right_default" />
+        android:drawable="@drawable/left_arrow_stats" />

  <item android:state_pressed="true"
-      android:drawable="@drawable/btn_arrow_right_press" />
+        android:drawable="@drawable/left_arrow_stats_press" />

-  <item android:drawable="@drawable/btn_arrow_right_default" />
+  <item android:drawable="@drawable/left_arrow_stats" />

 </selector>
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2010 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.
+-->
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+
+  <item android:state_window_focused="false"
+        android:drawable="@drawable/left_arrow_track" />
+
+  <item android:state_pressed="true"
+        android:drawable="@drawable/left_arrow_track_press" />
+
+  <item android:drawable="@drawable/left_arrow_track" />
+
+</selector>
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2010 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.
+-->
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+
+  <item android:state_window_focused="false"
+        android:drawable="@drawable/right_arrow_chart" />
+
+  <item android:state_pressed="true"
+        android:drawable="@drawable/right_arrow_chart_press" />
+
+  <item android:drawable="@drawable/right_arrow_chart" />
+
+</selector>
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2010 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.
+-->
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+
+  <item android:state_window_focused="false"
+        android:drawable="@drawable/right_arrow_stats" />
+
+  <item android:state_pressed="true"
+        android:drawable="@drawable/right_arrow_stats_press" />
+
+  <item android:drawable="@drawable/right_arrow_stats" />
+
+</selector>
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2010 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.
+-->
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+
+  <item android:state_window_focused="false"
+        android:drawable="@drawable/right_arrow_track" />
+
+  <item android:state_pressed="true"
+        android:drawable="@drawable/right_arrow_track_press" />
+
+  <item android:drawable="@drawable/right_arrow_track" />
+
+</selector>
@@ -20,10 +20,15 @@
    android:icon="@android:drawable/ic_menu_preferences"
    android:orderInCategory="1001"
    android:title="@string/settings"/>
+    
+  <item android:id="@+id/menu_aggregated_stats"
+    android:icon="@android:drawable/ic_menu_info_details"
+    android:orderInCategory="1002"
+    android:title="@string/aggregated_stats"/>

  <item android:id="@+id/menu_help"
    android:icon="@android:drawable/ic_menu_info_details"
-    android:orderInCategory="1002"
+    android:orderInCategory="1003"
    android:title="@string/help"/>

 </menu>
@@ -155,7 +155,6 @@ limitations under the License.

  <string name="settings_announcement_frequency">Dauer zwischen Ansagen:</string>
  <string name="settings_announcement_frequency_summary">Kürzeste Zeit zwichen zwei Ansagen</string>
-  <string name="settings_announcement_not_available_summary">Gesprochene Ansagen sind mit Ihrer Version von Android nicht verfügbar.</string>

  <string name="settings_min_recording_distance">Kleinste Entfernung zwischen Punkten:</string>
  <string name="settings_min_recording_distance_summary">Kleinste Entfernung zwischen zwei Positionsaufzeichnungen</string>
@@ -158,7 +158,6 @@ limitations under the License.

  <string name="settings_announcement_frequency">Tiempo entre anuncios</string>
  <string name="settings_announcement_frequency_summary">Tiempo mínimo entre dos anuncios de voz</string>
-  <string name="settings_announcement_not_available_summary">Conversión de anuncios de texto a voz no esta disponible en su versión de Android</string>

  <string name="settings_min_recording_distance">Distancia mínima entre puntos consecutivos</string>
  <string name="settings_min_recording_distance_summary">Distancia mínima entre dos grabaciones de posición</string>
@@ -158,7 +158,6 @@ limitations under the License.

  <string name="settings_announcement_frequency">Fréquence des annonces</string>
  <string name="settings_announcement_frequency_summary">Temps minimum entre eux annonces vocales</string>
-  <string name="settings_announcement_not_available_summary">La synthèse vocale n\'est pas disponible pour cette version d\'Android</string>

  <string name="settings_min_recording_distance">Distance min. entre 2 points</string>
  <string name="settings_min_recording_distance_summary">Plus petite distance entre deux enregistrements de votre position</string>
@@ -164,7 +164,6 @@ limitations under the License.

  <string name="settings_announcement_frequency">Intervallo fra due annunci:</string>
  <string name="settings_announcement_frequency_summary">Tempo minimo fra due annunci audio</string>
-  <string name="settings_announcement_not_available_summary">Gli annunci audio non sono disponibili in questa varsione di Android</string>

  <string name="settings_min_recording_distance">Distanza minima fra due punti successivi:</string>
  <string name="settings_min_recording_distance_summary">Distanza minima fra due successive registrazioni della posizione</string>
@@ -164,7 +164,7 @@ limitations under the License.

  <string name="settings_announcement_frequency">定期通知</string>
  <string name="settings_announcement_frequency_summary">音声通知間隔の最小時間</string>
-  <string name="settings_announcement_not_available_summary">お使いのAndroidの版では音声読み上げ機能がありません</string>
+  

  <string name="settings_min_recording_distance">ポイント間の最短距離</string>
  <string name="settings_min_recording_distance_summary">位置記録間の最短距離</string>
@@ -164,7 +164,7 @@ limitations under the License.

  <string name="settings_announcement_frequency">Częstotliwość komunikatów</string>
  <string name="settings_announcement_frequency_summary">Minimalny czas między dwoma komunikatami głosowymi</string>
-  <string name="settings_announcement_not_available_summary">Brak wsparcia dla syntezy mowy w twojej wersji Androida</string>
+  

  <string name="settings_min_recording_distance">Min. odległość między punktami</string>
  <string name="settings_min_recording_distance_summary">Najmniejsza odległość między dwoma zapisami twojej pozycji</string>
@@ -157,7 +157,6 @@ limitations under the License.
  <string name="settings_sharing">Compartilhamento</string>
  <string name="settings_announcement_frequency">Tempo entre anúncios</string>
  <string name="settings_announcement_frequency_summary">Tempo mínimo entre dois anúncios de voz</string>
-  <string name="settings_announcement_not_available_summary">Anúncios de voz não estão disponíveis em sua versão do Android</string>
  <string name="settings_min_recording_distance">Dist. mín. entre pontos</string>
  <string name="settings_min_recording_distance_summary">Menor distância entre duas gravações da sua posição</string>
  <string name="settings_max_recording_distance">Dist. máx. entre pontos</string>
@@ -43,19 +43,19 @@ limitations under the License.
  <string name="error_generic">Ett fel uppstod. Försök igen.</string>
  <string name="error_track_does_not_exist">Spåret finns inte.</string>
  <string name="error_out_of_memory">Den här filen är för stor (måste vara mindre än 500 KB). Avbryter.</string>
-  <string name="error_unable_to_insert_marker">Kan inte skapa markör. Ingen possition tillgänglig.</string>
+  <string name="error_unable_to_insert_marker">Kan inte skapa markör. Ingen position tillgänglig.</string>

  <!-- Status messages -->
-  <string name="wait_for_fix">Väntar på bättre GPS-posstion. Se till att himlen är synlig.</string>
+  <string name="wait_for_fix">Väntar på bättre GPS-position. Se till att himlen är synlig.</string>
  <string name="status_now_recording">Spelar nu in ett nytt spår.</string>
  <string name="status_stopped_recording">Stoppade inspelning av ditt spår.</string>
  <string name="status_new_mymap_has_been_created">En ny Google My Map har skapats på maps.google.com.</string>
  <string name="status_tracks_have_been_uploaded">Ditt spår har skickats till maps.google.com.</string>
-  <string name="status_tracks_have_been_uploaded_to_new_doc">Ditt spår har skockats till ett nytt kalkylblad på docs.google.com.</string>
+  <string name="status_tracks_have_been_uploaded_to_new_doc">Ditt spår har skickats till ett nytt kalkylblad på docs.google.com.</string>
  <string name="status_tracks_have_been_uploaded_to_docs">Ditt spår har skickats till docs.google.com.</string>
  <string name="status_mymap_info">Det kan ibland ta några minuter innan nya spår visas.</string>
  <string name="status_enable_gps">Klicka här för att gå till Säkerhet och Platsinställningar och kryssa i \'aktivera gps-satteliter\'. Tryck på tillbakaknappen för att återgå.</string>
-  <string name="status_approximate_location">OBS: En ungerfärlig position som avgörs från mobilmaster och WIFI-nät visas.</string>
+  <string name="status_approximate_location">OBS: En ungefärlig position som avgörs från mobilmaster och WIFI-nät visas.</string>
  <string name="status_no_location">En position kan för närvarande inte fastställas. Aktivera mer platskällor (se Säkerhet och Platsinställningar) och se till att himlen är synlig. Försök igen senare.</string>
  <string name="status_waypoint_inserted">En positionsmarkör har lagts in.</string>
  <string name="status_statistics_inserted">En statistikmarkör har lagts in.</string>
@@ -71,7 +71,7 @@ limitations under the License.
  <string name="progress_message_sending_mymaps">Skickar spår till Google Maps...</string>
  <string name="progress_message_creating_map">Skapar en ny My Map...</string>
  <string name="import_progress_message">Importerar ett GPS-spår. Detta kan ta en stund.</string>
-  <string name="write_progress_message">Skriver til till SD-kortet. Detta kan ta en stund.</string>
+  <string name="write_progress_message">Skriver till SD-kortet. Detta kan ta en stund.</string>
  <string name="progress_message_updating_track">Uppdaterar spårstatistik...</string>

  <!-- Used by DeleteAllDataHandler -->
@@ -125,7 +125,7 @@ limitations under the License.
  <!-- Export All -->
  <string name="tracklist_btn_export_all">Exportera alla spår</string>
  <string name="export_done">Exporteringen slutfördes</string>
-  <string name="tracklist_pick_one">Välj ett spår. TryckPress&amp;håll för fler alternativ.</string>
+  <string name="tracklist_pick_one">Välj ett spår. Tryck&amp;håll för fler alternativ.</string>
  <string name="tracklist_all_tracks">Alla spår:</string>
  <string name="tracklist_this_track">Det här spåret</string>
  <string name="tracklist_share_track">Dela med vänner...</string>
@@ -143,13 +143,13 @@ limitations under the License.
  <string name="waypointslist_show_waypoint">Visa på karta</string>
  <string name="waypointslist_btn_insert_waypoint">Infoga positionspunkt</string>
  <string name="waypointslist_btn_insert_statistics">Infoga statistik</string>
-  <string name="waypointslist_pick_one">Välj en markör. TryckPress&amp;håll för fler alternativ.</string>
+  <string name="waypointslist_pick_one">Välj en markör. Tryck&amp;håll för fler alternativ.</string>

  <!-- MyTracks Details -->
  <string name="trackdetails_title">Spårdetaljer</string>
  <string name="trackdetails_name">Spårnamn</string>
  <string name="trackdetails_description">Spårbeskrivning</string>
-  <string name="trackdetails_category">Aktivitetstyp (t ex vandring, cyckling, låpning, klättring...)</string>
+  <string name="trackdetails_category">Aktivitetstyp (t ex vandring, cyckling, löpning, klättring...)</string>

  <!-- MyTracks Waypoint Details -->
  <string name="waypointdetails_title">Markördetaljer</string>
@@ -165,7 +165,7 @@ limitations under the License.

  <string name="settings_announcement_frequency">Meddelandefrekvens</string>
  <string name="settings_announcement_frequency_summary">Minimumtid mellan två röstmeddelanden</string>
-  <string name="settings_announcement_not_available_summary">Text-till-talmeddelanden är inte tillgängligt i din version av Android</string>
+  

  <string name="settings_min_recording_distance">Min distans mellan två punkter</string>
  <string name="settings_min_recording_distance_summary">Minsta distans mellan två inspelningar av din position</string>
@@ -199,11 +199,11 @@ limitations under the License.
  <string name="settings_signal_sampling_frequency_summary">Tid mellan två inspelningar av telefonens signalstyrka</string>

  <string name="settings_split_frequency">Delningsfrekvens</string>
-  <string name="settings_split_frequency_summary">Maximala tiden eller distansen varefter en ny delnginsmarkör kommer infogas</string>
+  <string name="settings_split_frequency_summary">Maximala tiden eller distansen varefter en ny delningsmarkör kommer infogas</string>
  <string name="pace_label">Tempo</string>

  <!-- MyTracksSky -->
-  <string name="mytracks_sky">GPS-satteliter</string>
+  <string name="mytracks_sky">GPS-satelliter</string>

  <!-- My Maps -->
  <string name="select_map_message">Välje en karta från ditt konto:</string>
@@ -240,7 +240,7 @@ limitations under the License.
  <!-- Visibility -->
  <string name="public_map">Publik</string>
  <string name="unlisted_map">Olistat</string>
-  <string name="mapslist_no_maps_available">Du har inge kartor än.</string>
+  <string name="mapslist_no_maps_available">Du har inga kartor än.</string>

  <!-- Statistics View -->
  <!-- Average Moving -->
@@ -253,7 +253,7 @@ limitations under the License.

  <string name="elevation_chart_name">Höjddiagram</string>
  <string name="elevation_gain_label">Höjdvinst</string>
-  <string name="elevation_label">Höjt</string>
+  <string name="elevation_label">Höjd</string>
  <string name="latitude_label">Latitud</string>
  <string name="longitude_label">Longitud</string>

@@ -167,7 +167,7 @@ limitations under the License.

  <string name="settings_announcement_frequency">提示频度</string>
  <string name="settings_announcement_frequency_summary">语音提示的最小时间间隔</string>
-  <string name="settings_announcement_not_available_summary">你所使用的 Android 版本不支持文本到语音转换</string>
+  

  <string name="settings_min_recording_distance">最小记录间距</string>
  <string name="settings_min_recording_distance_summary">位置记录的最小间隔距离</string>
@@ -38,6 +38,7 @@ limitations under the License.
  <string name="share_url_only_key">shareUrlOnly</string>
  <string name="signal_sampling_frequency_key">signalSamplingFrequency</string>
  <string name="split_frequency_key">splitFrequency</string>
+  <string name="debug_draw_bounds_key">debugDrawBounds</string>

  <!-- Preference keys which keep transient state (not user preferences) - DO NOT TRANSLATE -->
  <string name="recording_track_key">recordingTrack</string>
@@ -32,6 +32,7 @@ limitations under the License.
  <string name="choose_track_message">Please select the track to view</string>
  <string name="current_track">Current track</string>
  <string name="current_segment">Last segment</string>
+  <string name="aggregated_stats">Aggregated Statistics</string>

  <!-- Error messages -->
  <string name="error_no_location_manager">No location manager was found on this device!</string>
@@ -133,4 +133,13 @@ limitations under the License.
          android:persistent="false" />
    </PreferenceCategory>
  </PreferenceScreen>
+
+  <!-- Debug settings - uncomment this while debugging only -->
+  <!-- 
+  <PreferenceScreen android:title="Debug">
+    <CheckBoxPreference android:key="@string/debug_draw_bounds_key"
+                        android:title="Draw bounding box"
+                        android:defaultValue="false" />
+  </PreferenceScreen>
+  -->
 </PreferenceScreen>
@@ -25,5 +25,8 @@ public class MyMapsConstants {
      "http://maps.google.com/maps/ms";
  public static final String MAPSHOP_SERVICE = MapsClient.SERVICE;

+  /**
+   * Private constructor to prevent instantiation.
+   */
  private MyMapsConstants() { }
 }
@@ -0,0 +1,114 @@
+package com.google.android.apps.mytracks;
+
+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.maps.mytracks.R;
+
+import android.app.Activity;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
+import android.os.Bundle;
+import android.util.DisplayMetrics;
+import android.util.Log;
+import android.view.Window;
+import android.widget.ScrollView;
+import android.widget.TextView;
+
+import java.util.List;
+
+/**
+ * Activity for viewing the combined statistics for all the recorded tracks.
+ * 
+ * Other features to add - menu items to change setings.
+ * 
+ * @author Fergus Nelson
+ */
+public class AggregatedStatsActivity extends Activity implements
+        OnSharedPreferenceChangeListener {
+
+  private final StatsUtilities utils;
+
+  private MyTracksProviderUtils tracksProvider;
+
+  private boolean metricUnits = true;
+
+  public AggregatedStatsActivity() {
+    this.utils = new StatsUtilities(this);
+    this.tracksProvider = MyTracksProviderUtils.Factory.get(this);
+  }
+
+  @Override
+  public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
+          String key) {
+    Log.d(MyTracksConstants.TAG, "StatsActivity: onSharedPreferences changed "
+            + key);
+    if (key != null) {
+      if (key.equals(R.string.metric_units_key)) {
+        metricUnits = sharedPreferences.getBoolean(
+                getString(R.string.metric_units_key), true);
+        utils.setMetricUnits(metricUnits);
+        utils.updateUnits();
+        loadAggregatedStats();
+      }
+    }
+  }
+
+  @Override
+  protected void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+
+    // We don't need a window title bar:
+    requestWindowFeature(Window.FEATURE_NO_TITLE);
+    setContentView(R.layout.stats);
+
+    ScrollView sv = ((ScrollView) findViewById(R.id.scrolly));
+    sv.setScrollBarStyle(ScrollView.SCROLLBARS_OUTSIDE_INSET);
+
+    SharedPreferences preferences = getSharedPreferences(
+            MyTracksSettings.SETTINGS_NAME, 0);
+    if (preferences != null) {
+      metricUnits = preferences.getBoolean(getString(R.string.metric_units_key), true);
+      preferences.registerOnSharedPreferenceChangeListener(this);
+    }
+    utils.setMetricUnits(metricUnits);
+    utils.updateUnits();
+    utils.setSpeedLabel(R.id.speed_label, R.string.speed, R.string.pace_label);
+    utils.setSpeedLabels();
+
+    DisplayMetrics metrics = new DisplayMetrics();
+    getWindowManager().getDefaultDisplay().getMetrics(metrics);
+    if (metrics.heightPixels > 600) {
+      ((TextView) findViewById(R.id.speed_register)).setTextSize(80.0f);
+    }
+    loadAggregatedStats();
+  }
+
+  /**
+   * 1. Reads tracks from the db 
+   * 2. Merges the trip stats from the tracks 
+   * 3. Updates the view
+   */
+  private void loadAggregatedStats() {
+    List<Track> tracks = retrieveTracks();
+    TripStatistics rollingStats = null;
+    if (!tracks.isEmpty()) {
+      rollingStats = new TripStatistics(tracks.iterator().next()
+              .getStatistics());
+      for (int i = 1; i < tracks.size(); i++) {
+        rollingStats.merge(tracks.get(i).getStatistics());
+      }
+    }
+    updateView(rollingStats);
+  }
+
+  private List<Track> retrieveTracks() {
+    return tracksProvider.getAllTracks();
+  }
+
+  private void updateView(TripStatistics aggStats) {
+    if (aggStats != null) {
+      utils.setAllStats(aggStats);
+    }
+  }
+}
@@ -176,11 +176,15 @@ public class ChartActivity extends Activity implements
            final int idColumnIdx =
                cursor.getColumnIndexOrThrow(TrackPointsColumns._ID);
            ArrayList<double[]> data = new ArrayList<double[]>();
+            // Need two locations so we can keep track of the last location.
+            Location location = new Location("");
            do {
              lastSeenLocationId = cursor.getLong(idColumnIdx);
-              Location location = providerUtils.createLocation(cursor);
-              if (location != null && MyTracksUtils.isValidLocation(location)) {
-                data.add(getDataPoint(location, track));
+              providerUtils.fillLocation(cursor, location);
+              if (MyTracksUtils.isValidLocation(location)) {
+                double[] point = new double[3];
+                location = getDataPoint(location, track, point);
+                data.add(point);
              }
            } while (cursor.moveToPrevious());
            cv.addDataPoints(data);
@@ -461,11 +465,14 @@ public class ChartActivity extends Activity implements
   * data[1] = the elevation
   * data[2] = the speed
   *
-   * @param location a location
-   * @return the data point
+   * This must be called in order for each point.
+   *
+   * @param location the location to get data for (this method takes ownership of that location)
+   * @param track the track to get data from
+   * @param result the resulting point to fill out
+   * @return the previous location, now available for reuse
   */
-  public double[] getDataPoint(Location location, Track track) {
-    double[] result = new double[3];
+  private Location getDataPoint(Location location, Track track, double[] result) {
    switch (mode) {
      case BY_DISTANCE:
        result[0] = profileLength;
@@ -512,8 +519,16 @@ public class ChartActivity extends Activity implements
      // Format as hours per unit
      result[2] = (60.0 / result[2]);
    }
+
+    Location oldLastLocation = lastLocation;
    lastLocation = location;
-    return result;
+
+    if (oldLastLocation == null) {
+      // No previous location, but return a blank one for reuse
+      return new Location("");
+    }
+
+    return oldLastLocation;
  }

  /**
@@ -556,6 +571,8 @@ public class ChartActivity extends Activity implements
    try {
      final ArrayList<double[]> theData = new ArrayList<double[]>();
      int points = 0;
+      // Need two locations so we can keep track of the last location.
+      Location location = new Location("");
      while (lastLocationRead < track.getStopId()) {
        cursor = providerUtils.getLocationsCursor(
            selectedTrackId, lastLocationRead, bufferSize, false);
@@ -567,11 +584,12 @@ public class ChartActivity extends Activity implements
                cursor.getColumnIndexOrThrow(TrackPointsColumns._ID);
            while (cursor.moveToNext()) {
              points++;
-              Location location = providerUtils.createLocation(cursor);
+              providerUtils.fillLocation(cursor, location);
              if (MyTracksUtils.isValidLocation(location)) {
                lastLocationRead = lastSeenLocationId =
                    cursor.getLong(idColumnIdx);
-                double[] point = getDataPoint(location, track);
+                double[] point = new double[3];
+                location = getDataPoint(location, track, point);
                if (points % chartSamplingFrequency == 0) {
                  theData.add(point);
                }
@@ -78,6 +78,11 @@ class MenuManager {
        activity.startActivity(startIntent);
        return true;
      }
+      case R.id.menu_aggregated_stats: {
+        Intent startIntent = new Intent(activity, AggregatedStatsActivity.class);
+        activity.startActivity(startIntent);
+        return true;
+      }
      case R.id.menu_help: {
        Intent startIntent = new Intent(activity, WelcomeActivity.class);
        activity.startActivity(startIntent);
@@ -75,7 +75,6 @@ import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.HashMap;
-import java.util.Random;

 import javax.xml.parsers.ParserConfigurationException;

@@ -217,40 +216,25 @@ public class MyTracks extends TabActivity implements OnTouchListener,
   * Tabs/View navigation:
   */

-  private static final int NUM_TABS = 3;
-  private int currentTab = 0;
-
  private NavControls navControls;

-  private final int icons[] =
-      { R.drawable.arrow_grey, R.drawable.menu_by_time,
-        R.drawable.menu_elevation };
+  /** Icons shown on the left for each tab. */
+  private final int leftIcons[] =
+      { R.drawable.left_arrow_chart_stateful,
+        R.drawable.left_arrow_track_stateful,
+        R.drawable.left_arrow_stats_stateful };
+  /** Icons shown on the right for each tab. */
+  private final int rightIcons[] =
+      { R.drawable.right_arrow_stats_stateful,
+        R.drawable.right_arrow_chart_stateful,
+        R.drawable.right_arrow_track_stateful };

-  private final Runnable nextActivity = new Runnable() {
+  private final Runnable changeTab = new Runnable() {
    public void run() {
-      currentTab = (currentTab + 1) % NUM_TABS;
-      navControls.setLeftIcon(icons[(currentTab + NUM_TABS - 1) % NUM_TABS]);
-      navControls.setRightIcon(icons[(currentTab + NUM_TABS + 1) % NUM_TABS]);
-      getTabHost().setCurrentTab(currentTab);
-      navControls.show();
+      getTabHost().setCurrentTab(navControls.getCurrentIcons());
    }
  };

-  private final Runnable prevActivity = new Runnable() {
-    public void run() {
-      currentTab--;
-      if (currentTab < 0) {
-        currentTab = NUM_TABS - 1;
-      }
-      navControls.setLeftIcon(icons[(currentTab + NUM_TABS - 1) % NUM_TABS]);
-      navControls.setRightIcon(icons[(currentTab + NUM_TABS + 1) % NUM_TABS]);
-      getTabHost().setCurrentTab(currentTab);
-      navControls.show();
-    }
-  };
-
-  private final Random random = new Random();
-
  public static MyTracks getInstance() {
    return instance;
  }
@@ -311,9 +295,7 @@ public class MyTracks extends TabActivity implements OnTouchListener,
    LayoutParams params =
        new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
    layout.setLayoutParams(params);
-    navControls = new NavControls(this, layout, prevActivity, nextActivity);
-    navControls.setLeftIcon(icons[NUM_TABS - 1]);
-    navControls.setRightIcon(icons[1]);
+    navControls = new NavControls(this, layout, leftIcons, rightIcons, changeTab);
    navControls.show();
    tabHost.addView(layout);
    layout.setOnTouchListener(this);
@@ -376,8 +358,6 @@ public class MyTracks extends TabActivity implements OnTouchListener,
    Log.d(MyTracksConstants.TAG, "MyTracks.onResume");
    super.onResume();
    tryBindTrackRecordingService();
-    navControls.setLeftIcon(icons[(currentTab + NUM_TABS - 1) % NUM_TABS]);
-    navControls.setRightIcon(icons[(currentTab + NUM_TABS + 1) % NUM_TABS]);
  }

  @Override
@@ -828,33 +808,33 @@ public class MyTracks extends TabActivity implements OnTouchListener,
   * This is for debugging and testing only. Useful if there is no GPS signal
   * available.
   */
-  public void recordRandomLocation() {
-    if (trackRecordingService != null) {
-      Location loc = new Location("gps");
-      double latitude = 37.5 + random.nextDouble() / 1000;
-      double longitude = -120.0 + random.nextDouble() / 1000;
-      loc.setLatitude(latitude);
-      loc.setLongitude(longitude);
-      loc.setAltitude(random.nextDouble() * 100);
-      loc.setTime(System.currentTimeMillis());
-      loc.setSpeed(random.nextFloat());
-      MyTracksMap map =
-          (MyTracksMap) getLocalActivityManager().getActivity("tab1");
-      if (map != null) {
-        map.onLocationChanged(loc);
-      }
-      StatsActivity stats =
-          (StatsActivity) getLocalActivityManager().getActivity("tab2");
-      if (stats != null) {
-        stats.onLocationChanged(loc);
-      }
-      try {
-        trackRecordingService.recordLocation(loc);
-      } catch (RemoteException e) {
-        Log.e(MyTracksConstants.TAG, "MyTracks", e);
-      }
-    }
-  }
+//  public void recordRandomLocation() {
+//    if (trackRecordingService != null) {
+//      Location loc = new Location("gps");
+//      double latitude = 37.5 + random.nextDouble() / 1000;
+//      double longitude = -120.0 + random.nextDouble() / 1000;
+//      loc.setLatitude(latitude);
+//      loc.setLongitude(longitude);
+//      loc.setAltitude(random.nextDouble() * 100);
+//      loc.setTime(System.currentTimeMillis());
+//      loc.setSpeed(random.nextFloat());
+//      MyTracksMap map =
+//          (MyTracksMap) getLocalActivityManager().getActivity("tab1");
+//      if (map != null) {
+//        map.onLocationChanged(loc);
+//      }
+//      StatsActivity stats =
+//          (StatsActivity) getLocalActivityManager().getActivity("tab2");
+//      if (stats != null) {
+//        stats.onLocationChanged(loc);
+//      }
+//      try {
+//        trackRecordingService.recordLocation(loc);
+//      } catch (RemoteException e) {
+//        Log.e(MyTracksConstants.TAG, "MyTracks", e);
+//      }
+//    }
+//  }

  /**
   * Resets status information for sending to MyMaps/Docs.
@@ -70,8 +70,9 @@ import android.widget.Toast;
 * @author Leif Hendrik Wilden
 */
 public class MyTracksMap extends MapActivity
-    implements LocationListener, SensorEventListener, View.OnTouchListener,
-    View.OnClickListener, SharedPreferences.OnSharedPreferenceChangeListener {
+    implements View.OnTouchListener, View.OnClickListener,
+    SharedPreferences.OnSharedPreferenceChangeListener {
+  private static final int TRACKPOINT_BUFFER_SIZE = 1024;

  // Saved instance state keys:
  // ---------------------------
@@ -82,9 +83,9 @@ public class MyTracksMap extends MapActivity
  public static final String KEY_HAVE_GOOD_FIX = "haveGoodFix";

  /**
-   * The currently selected track (or null if nothing selected).
+   * The ID of the currently selected track (or -1 if nothing selected).
   */
-  private Track selectedTrack;
+  private long selectedTrackId = -1;

  /**
   * The id of the currently recording track.
@@ -97,13 +98,19 @@ public class MyTracksMap extends MapActivity
   */
  private boolean keepMyLocationVisible;

+  /**
+   * Id of the first location that was seen when reading tracks from the
+   * provider.
+   */
+  private long firstSeenLocationId = -1;
+
  /**
   * Id of the last location that was seen when reading tracks from the
   * provider. This is used to determine which locations are new compared to the
   * last time the mapOverlay was updated.
   */
  private long lastSeenLocationId = -1;
-
+  
  /**
   * Magnetic variation.
   */
@@ -130,19 +137,13 @@ public class MyTracksMap extends MapActivity
   * A thread with a looper. Post to updateTrackHandler to execute Runnables on
   * this thread.
   */
-  private final HandlerThread updateTrackThread =
-      new HandlerThread("updateTrackThread");
+  private HandlerThread updateTrackThread;

  /** Handler for updateTrackThread */
  private Handler updateTrackHandler;

  private MyTracksProviderUtils providerUtils;
 
-  /**
-   * This value is used to decide how many points to display.
-   */
-  private int samplingFrequency = 1;
-
  /**
   * A runnable that updates the track from the provider (looking for points
   * added after "lastSeenLocationId".
@@ -150,7 +151,7 @@ public class MyTracksMap extends MapActivity
  private final Runnable updateTrackRunnable = new Runnable() {
    @Override
    public void run() {
-      if (selectedTrack == null) {
+      if (!isATrackSelected()) {
        return;
      }
      readAllNewTrackPoints();
@@ -163,11 +164,12 @@ public class MyTracksMap extends MapActivity
  private Runnable restoreTrackRunnable = new Runnable() {
    @Override
    public void run() {
-      if (selectedTrack == null) {
+      if (!isATrackSelected()) {
        return;
      }
      mapOverlay.clearPoints();
-      lastSeenLocationId = selectedTrack.getStartId();
+      firstSeenLocationId = -1;
+      lastSeenLocationId = -1;
      readAllNewTrackPoints();
    }
  };
@@ -178,7 +180,7 @@ public class MyTracksMap extends MapActivity
  private final Runnable restoreWaypointsRunnable = new Runnable() {
    @Override
    public void run() {
-      if (selectedTrack == null) {
+      if (!isATrackSelected()) {
        return;
      }

@@ -188,7 +190,7 @@ public class MyTracksMap extends MapActivity
        // We will silently drop extra waypoints to make the app responsive.
        // TODO: Try to only load the waypoints in the view port.
        cursor = providerUtils.getWaypointsCursor(
-            selectedTrack.getId(), 0,
+            selectedTrackId, 0,
            MyTracksConstants.MAX_DISPLAYED_WAYPOINTS_POINTS);
        if (cursor != null) {
          if (cursor.moveToFirst()) {
@@ -219,10 +221,9 @@ public class MyTracksMap extends MapActivity
    public void run() {
      uiHandler.post(new Runnable() {
        public void run() {
-          showTrack(selectedTrack);
-          mapOverlay.setSelectedTrack(selectedTrack);
-          mapOverlay.setShowEndMarker(selectedTrack == null ||
-              selectedTrack.getId() != recordingTrackId);
+          showTrack(selectedTrackId);
+          mapOverlay.setTrackDrawingEnabled(isATrackSelected());
+          mapOverlay.setShowEndMarker(!isRecordingSelected());
          mapView.invalidate();
          busyPane.setVisibility(View.GONE);
          updateOptionsButton();
@@ -316,6 +317,7 @@ public class MyTracksMap extends MapActivity
    locationManager =
        (LocationManager) getSystemService(Context.LOCATION_SERVICE);

+    updateTrackThread = new HandlerThread("updateTrackThread");
    updateTrackThread.start();
    updateTrackHandler = new Handler(updateTrackThread.getLooper());

@@ -331,8 +333,7 @@ public class MyTracksMap extends MapActivity
          // No track is being recorded. We should not be here.
          return;
        }
-        if (selectedTrack == null
-            || selectedTrack.getId() != recordingTrackId) {
+        if (!isRecordingSelected()) {
          // No track, or one other than the recording track is selected,
          // don't bother.
          return;
@@ -348,7 +349,7 @@ public class MyTracksMap extends MapActivity
      public void onChange(boolean selfChange) {
        Log.d(MyTracksConstants.TAG,
            "MyTracksMap: ContentObserver.onChange waypoints");
-        if (selectedTrack == null) {
+        if (!isATrackSelected()) {
          return;
        }
        updateTrackHandler.post(restoreWaypointsRunnable);
@@ -371,20 +372,29 @@ public class MyTracksMap extends MapActivity
        setSelectedTrack(selectedTrackId);
      }
      updateOptionsButton();
+      mapOverlay.setDrawBounds(preferences.getBoolean(
+          getString(R.string.debug_draw_bounds_key), false));
      preferences.registerOnSharedPreferenceChangeListener(this);
    }
  }

-  protected void setupZoomControls() {
-    mapView.setBuiltInZoomControls(true);
+  /**
+   * Returns whether there's a track currently selected for display.
+   */
+  private boolean isATrackSelected() {
+    return selectedTrackId >= 0;
  }

-  @Override
-  protected void onDestroy() {
-    // Final cleanup before activity is destroyed.
-    // May not be called at all in some situations.
-    Log.d(MyTracksConstants.TAG, "MyTracksMap.onDestroy");
-    super.onDestroy();
+  /**
+   * Returns whether we're currently recording the same track that's selected
+   * for display.
+   */
+  private boolean isRecordingSelected() {
+    return isATrackSelected() && selectedTrackId == recordingTrackId;
+  }
+
+  protected void setupZoomControls() {
+    mapView.setBuiltInZoomControls(true);
  }

  @Override
@@ -449,10 +459,9 @@ public class MyTracksMap extends MapActivity

    // While this activity was paused the user may have deleted the selected
    // track. In that case the map overlay needs to be cleared:
-    Track track = mapOverlay.getSelectedTrack();
-    if (track != null && !providerUtils.trackExists(track.getId())) {
+    if (isATrackSelected() && !providerUtils.trackExists(selectedTrackId)) {
      // The recording track must have been deleted meanwhile.
-      mapOverlay.setSelectedTrack(null);
+      mapOverlay.setTrackDrawingEnabled(false);
      mapView.invalidate();
    }
  }
@@ -514,10 +523,10 @@ public class MyTracksMap extends MapActivity
            + gpsProvider.getName());
      }
      locationManager.requestLocationUpdates(gpsProvider.getName(),
-          0 /*minTime*/, 0 /*minDist*/, this);
+          0 /*minTime*/, 0 /*minDist*/, locationListener);
      try {
        locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,
-            1000 * 60 * 5 /*minTime*/, 0 /*minDist*/, this);
+            1000 * 60 * 5 /*minTime*/, 0 /*minDist*/, locationListener);
      } catch (RuntimeException e) {
        // If anything at all goes wrong with getting a cell location do not
        // abort. Cell location is not essential to this app.
@@ -535,7 +544,7 @@ public class MyTracksMap extends MapActivity
    Log.d(MyTracksConstants.TAG,
        "MyTracksMap: Now registering sensor listeners.");
    sensorManager.registerListener(
-        this, compass, SensorManager.SENSOR_DELAY_UI);
+        sensorListener, compass, SensorManager.SENSOR_DELAY_UI);
  }

  /**
@@ -545,12 +554,12 @@ public class MyTracksMap extends MapActivity
    if (locationManager != null) {
      Log.d(MyTracksConstants.TAG,
          "MyTracksMap: Now unregistering location listeners.");
-      locationManager.removeUpdates(this);
+      locationManager.removeUpdates(locationListener);
    }
    if (sensorManager != null) {
      Log.d(MyTracksConstants.TAG,
          "MyTracksMap: Now unregistering sensor listeners.");
-      sensorManager.unregisterListener(this);
+      sensorManager.unregisterListener(sensorListener);
    }
  }

@@ -579,7 +588,7 @@ public class MyTracksMap extends MapActivity
   */
  private void updateOptionsButton() {
    optionsBtn.setVisibility(
-        selectedTrack != null ? View.VISIBLE : View.INVISIBLE);
+        isATrackSelected() ? View.VISIBLE : View.INVISIBLE);
  }

  /**
@@ -632,12 +641,18 @@ public class MyTracksMap extends MapActivity
  /**
   * Zooms and pans the map so that the given track is visible.
   *
-   * @param track a given track
+   * @param trackId a given track ID
   */
-  public void showTrack(Track track) {
-    if (track == null || mapView == null || track.getNumberOfPoints() < 2) {
+  public void showTrack(long trackId) {
+    if (mapView == null) {
      return;
    }
+
+    Track track = providerUtils.getTrack(trackId);
+    if (track == null || track.getNumberOfPoints() < 2) {
+      return;
+    }
+
    TripStatistics stats = track.getStatistics();
    int bottom = stats.getBottom();
    int left = stats.getLeft();
@@ -680,24 +695,30 @@ public class MyTracksMap extends MapActivity
   * @param trackId a given track id
   */
  public void setSelectedTrack(final long trackId) {
-    if (selectedTrack != null && selectedTrack.getId() == trackId) {
+    if (selectedTrackId == trackId) {
      // Selected track did not change, nothing to do.
-      mapOverlay.setSelectedTrack(selectedTrack);
+      mapOverlay.setTrackDrawingEnabled(isATrackSelected());
      mapView.invalidate();
      updateOptionsButton();
      return;
    }
+
    if (trackId < 0) {
      // Remove selection.
-      selectedTrack = null;
-      mapOverlay.setSelectedTrack(null);
+      selectedTrackId = -1;
+      mapOverlay.setTrackDrawingEnabled(false);
      mapOverlay.clearWaypoints();
      updateOptionsButton();
      mapView.invalidate();
      return;
    }
+
    busyPane.setVisibility(View.VISIBLE);
-    selectedTrack = providerUtils.getTrack(trackId);
+    selectedTrackId = trackId;
+    loadSelectedTrack();
+  }
+
+  private void loadSelectedTrack() {
    updateTrackHandler.post(restoreTrackRunnable);
    updateTrackHandler.post(restoreWaypointsRunnable);
    updateTrackHandler.post(setSelectedTrackRunnable);
@@ -753,8 +774,7 @@ public class MyTracksMap extends MapActivity
          menu.setHeaderTitle(R.string.tracklist_this_track);
          menu.add(0, MyTracksConstants.MENU_EDIT, 0,
              R.string.tracklist_edit_track);
-          if (!MyTracks.getInstance().isRecording() || (selectedTrack != null
-              && selectedTrack.getId() != recordingTrackId)) {
+          if (!MyTracks.getInstance().isRecording() || !isRecordingSelected()) {
            menu.add(0, MyTracksConstants.MENU_SEND_TO_GOOGLE, 0,
                R.string.tracklist_send_to_google);
            SubMenu share = menu.addSubMenu(0, MyTracksConstants.MENU_SHARE, 0,
@@ -791,7 +811,7 @@ public class MyTracksMap extends MapActivity
  @Override
  public boolean onMenuItemSelected(int featureId, MenuItem item) {
    if (!super.onMenuItemSelected(featureId, item)) {
-      if (selectedTrack != null) {
+      if (isATrackSelected()) {
        MyTracks.getInstance().onActivityResult(
            MyTracksConstants.getActionFromMenuId(item.getItemId()), RESULT_OK,
            new Intent());
@@ -852,8 +872,7 @@ public class MyTracksMap extends MapActivity
  public void onClick(View v) {
    if (v == messagePane) {
      launchMyLocationSettings();
-    }
-    if (v == optionsBtn) {
+    } else if (v == optionsBtn) {
      optionsBtn.performLongClick();
    }
  }
@@ -895,139 +914,155 @@ public class MyTracksMap extends MapActivity
                sharedPreferences.getLong(
                    getString(R.string.recording_track_key),
                    -1);
-            if (selectedTrack != null) {
-              mapOverlay.setShowEndMarker(
-                  selectedTrack.getId() != recordingTrackId);
+            if (isATrackSelected()) {
+              mapOverlay.setShowEndMarker(!isRecordingSelected());
              mapView.postInvalidate();
            }
+          } else if (key.equals(getString(R.string.debug_draw_bounds_key))) {
+            mapOverlay.setDrawBounds(
+                sharedPreferences.getBoolean(
+                    getString(R.string.debug_draw_bounds_key), false));
          }
        }
      });
    }
  }

-  @Override
-  public void onProviderEnabled(String provider) {
-    if (provider.equals(MyTracksConstants.GPS_PROVIDER)) {
-      messageText.setText(R.string.wait_for_fix);
-    }
-  }
-
-  @Override
-  public void onProviderDisabled(String provider) {
-    if (provider.equals(MyTracksConstants.GPS_PROVIDER)) {
-      messageText.setText(R.string.status_enable_gps);
-      messagePane.setVisibility(View.VISIBLE);
-      messagePane.setOnClickListener(this);
-      screen.requestLayout();
-    }
-  }
-
-  @Override
-  public void onLocationChanged(Location location) {
-    if (location.getProvider().equals(MyTracksConstants.GPS_PROVIDER)) {
-      // Recalculate the variation if there was a jump in location > 1km:
-      if (currentLocation == null
-          || location.distanceTo(currentLocation) > 1000) {
-        setVariation(location);
+  private final LocationListener locationListener = new LocationListener() {
+    @Override
+    public void onProviderEnabled(String provider) {
+      if (provider.equals(MyTracksConstants.GPS_PROVIDER)) {
+        messageText.setText(R.string.wait_for_fix);
      }
-      currentLocation = location;
-      boolean haveGoodFixNow =
-          currentLocation.getAccuracy() < minRequiredAccuracy;
-      if (haveGoodFixNow != haveGoodFix) {
-        haveGoodFix = haveGoodFixNow;
-        messagePane.setVisibility(haveGoodFix ? View.GONE : View.VISIBLE);
+    }
+
+    @Override
+    public void onProviderDisabled(String provider) {
+      if (provider.equals(MyTracksConstants.GPS_PROVIDER)) {
+        messageText.setText(R.string.status_enable_gps);
+        messagePane.setVisibility(View.VISIBLE);
+        messagePane.setOnClickListener(MyTracksMap.this);
        screen.requestLayout();
      }
-      showCurrentLocation();
-    } else {
-      Log.d(MyTracksConstants.TAG,
-          "MyTracksMap: Network location update received.");
    }
-  }

-  @Override
-  public void onStatusChanged(String provider, int status, Bundle extras) {
-    if (provider.equals(MyTracksConstants.GPS_PROVIDER)) {
-      switch (status) {
-        case LocationProvider.OUT_OF_SERVICE:
-        case LocationProvider.TEMPORARILY_UNAVAILABLE:
-          haveGoodFix = false;
-          messagePane.setVisibility(View.VISIBLE);
+    @Override
+    public void onLocationChanged(Location location) {
+      if (location.getProvider().equals(MyTracksConstants.GPS_PROVIDER)) {
+        // Recalculate the variation if there was a jump in location > 1km:
+        if (currentLocation == null
+            || location.distanceTo(currentLocation) > 1000) {
+          setVariation(location);
+        }
+        currentLocation = location;
+        boolean haveGoodFixNow =
+            currentLocation.getAccuracy() < minRequiredAccuracy;
+        if (haveGoodFixNow != haveGoodFix) {
+          haveGoodFix = haveGoodFixNow;
+          messagePane.setVisibility(haveGoodFix ? View.GONE : View.VISIBLE);
          screen.requestLayout();
-          break;
+        }
+        showCurrentLocation();
+      } else {
+        Log.d(MyTracksConstants.TAG,
+            "MyTracksMap: Network location update received.");
      }
    }
-  }

-  @Override
-  public void onSensorChanged(SensorEvent se) {
-    synchronized (this) {
-      float magneticHeading = se.values[0];
-      double heading = magneticHeading + variation;
-      if (mapOverlay.setHeading((float) heading)) {
-        mapView.invalidate();
+    @Override
+    public void onStatusChanged(String provider, int status, Bundle extras) {
+      if (provider.equals(MyTracksConstants.GPS_PROVIDER)) {
+        switch (status) {
+          case LocationProvider.OUT_OF_SERVICE:
+          case LocationProvider.TEMPORARILY_UNAVAILABLE:
+            haveGoodFix = false;
+            messagePane.setVisibility(View.VISIBLE);
+            screen.requestLayout();
+            break;
+        }
      }
    }
-  }
+  };

-  @Override
-  public void onAccuracyChanged(Sensor s, int accuracy) {
-    // do nothing
-  }
-  
-  /**
-   * Set the sampling frequency from the total number of points in the track.
-   *
-   * @param track The track to read the total number of points from.
-   */
-  private void setSamplingFrequency(Track track) {
-    long totalLocations = track.getStopId() - track.getStartId();
+  private final SensorEventListener sensorListener = new SensorEventListener() {
+    @Override
+    public void onSensorChanged(SensorEvent se) {
+      synchronized (this) {
+        float magneticHeading = se.values[0];
+        double heading = magneticHeading + variation;
+        if (mapOverlay.setHeading((float) heading)) {
+          mapView.invalidate();
+        }
+      }
+    }
+
+    @Override
+    public void onAccuracyChanged(Sensor s, int accuracy) {
+      // do nothing
+    }
+  };

-    // Limit the number of map points readings.
-    samplingFrequency =
-          (int) (1 +
-              totalLocations / MyTracksConstants.TARGET_DISPLAYED_TRACK_POINTS);
-    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();
+    int numPoints = mapOverlay.getNumLocations();
+    if (numPoints >= MyTracksConstants.MAX_DISPLAYED_TRACK_POINTS) {
+      // We're about to exceed the maximum allowed number of points, so reload
+      // the whole track with fewer points (the sampling frequency will be
+      // lower).
+      loadSelectedTrack();
+      return;
+    }
+
+    long lastStoredLocationId =
+        providerUtils.getLastLocationId(selectedTrackId);
+    int samplingFrequency = -1;
+    Location location = new Location("");
+    for (;;) {
+      Cursor cursor = null;
+      try {
+        cursor = providerUtils.getLocationsCursor(selectedTrackId,
+            lastSeenLocationId + 1, TRACKPOINT_BUFFER_SIZE, false);
+        if (cursor == null || !cursor.moveToFirst()) {
+          // No (more) data
+          break;
+        }

-    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);
+        do {
+          long locationId = cursor.getLong(idColumnIdx);
+          lastSeenLocationId = locationId;
+          if (firstSeenLocationId == -1) {
+            // This was our first point, keep its ID
+            firstSeenLocationId = locationId;
          }
+          if (samplingFrequency == -1) {
+            // Now we already have at least one point, calculate the sampling
+            // frequency
+            long numTotalPoints = lastStoredLocationId - firstSeenLocationId;
+            samplingFrequency = (int) (1 +
+                numTotalPoints / MyTracksConstants.TARGET_DISPLAYED_TRACK_POINTS);
+          }
+
+          providerUtils.fillLocation(cursor, location);
+
+          // Include a point if it fits one of the following criteria:
+          // - Has the mod for the sampling frequency (includes first point).
+          // - Is the last point and we are not recording this track.
+          // - The point is a segment split
+          if (numPoints % samplingFrequency == 0 ||
+              (!isRecordingSelected() && locationId == lastStoredLocationId) ||
+              !MyTracksUtils.isValidLocation(location)) {
+            // Only allocate a new location if it is going to be kept around.
+            mapOverlay.addLocation(new Location(location));
+          }
+
+          numPoints++;
+        } while (cursor.moveToNext());
+      } finally {
+        if (cursor != null) {
+          cursor.close();
        }
-      } else {
-        lastSeenLocationId += bufferSize;
      }
-      cursor.close();
-      cursor = null;
    }
    mapView.postInvalidate();
  }
@@ -15,10 +15,8 @@
 */
 package com.google.android.apps.mytracks;

-import com.google.android.apps.mytracks.content.Track;
 import com.google.android.apps.mytracks.content.Waypoint;
 import com.google.android.apps.mytracks.util.MyTracksUtils;
-
 import com.google.android.maps.GeoPoint;
 import com.google.android.maps.MapView;
 import com.google.android.maps.Overlay;
@@ -31,6 +29,7 @@ import android.graphics.Paint;
 import android.graphics.Path;
 import android.graphics.Point;
 import android.graphics.Rect;
+import android.graphics.Region;
 import android.graphics.drawable.Drawable;
 import android.location.Location;

@@ -57,10 +56,11 @@ public class MyTracksOverlay extends Overlay {
  private final ArrayList<Waypoint> waypoints = new ArrayList<Waypoint>();
  private final ArrayList<Location> points = new ArrayList<Location>(1024);

-  private Track selectedTrack;
+  private boolean trackDrawingEnabled;
  private int lastHeading = 0;
  private Location myLocation;
  private boolean showEndMarker = true;
+  private boolean drawBounds;

  public MyTracksOverlay(Context context) {
    this.context = context;
@@ -121,14 +121,6 @@ public class MyTracksOverlay extends Overlay {
    errorCirclePaint.setAntiAlias(true);
  }

-  public void setSelectedTrack(Track track) {
-    selectedTrack = track;
-  }
-
-  public Track getSelectedTrack() {
-    return selectedTrack;
-  }
-
  /**
   * Add a location to the map overlay.
   *
@@ -137,19 +129,35 @@ public class MyTracksOverlay extends Overlay {
   * @param l the location to add
   */
  public void addLocation(Location l) {
-    points.add(l);
+    if (l != null) {
+      synchronized (points) {
+        points.add(l);
+      }
+    }
  }

  public void addWaypoint(Waypoint wpt) {
    waypoints.add(wpt);
  }

+  public int getNumLocations() {
+    synchronized (points) {
+      return points.size();
+    }
+  }
+
  public void clearWaypoints() {
    waypoints.clear();
  }

  public void clearPoints() {
-    points.clear();
+    synchronized (points) {
+      points.clear();
+    }
+  }
+
+  public void setTrackDrawingEnabled(boolean trackDrawingEnabled) {
+    this.trackDrawingEnabled = trackDrawingEnabled;
  }

  public void setShowEndMarker(boolean showEndMarker) {
@@ -158,15 +166,23 @@ public class MyTracksOverlay extends Overlay {

  @Override
  public void draw(Canvas canvas, MapView mapView, boolean shadow) {
-
    if (shadow) {
      return;
    }

-    // Draw the selected track:
-    drawTrack(canvas, mapView, selectedTrack, true);
+    if (trackDrawingEnabled) {
+      // Draw the selected track:
+      drawTrack(canvas, mapView);

-    // Draw the waypoints:
+      // Draw the waypoints:
+      drawWaypoints(canvas, mapView);
+    }
+
+    // Draw the current location
+    drawMyLocation(canvas, mapView);
+  }
+
+  private void drawWaypoints(Canvas canvas, MapView mapView) {
    ArrayList<Waypoint> currentWaypoints = waypoints;
    for (int i = 1; i < currentWaypoints.size(); i++) {
      Waypoint wpt = currentWaypoints.get(i);
@@ -189,11 +205,14 @@ public class MyTracksOverlay extends Overlay {
      }
      canvas.restore();
    }
+  }

+  private void drawMyLocation(Canvas canvas, MapView mapView) {
    // Draw the arrow icon:
    if (myLocation == null) {
      return;
    }
+
    GeoPoint geoPoint = new GeoPoint(
        (int) (myLocation.getLatitude() * 1E6),
        (int) (myLocation.getLongitude() * 1E6));
@@ -210,79 +229,119 @@ public class MyTracksOverlay extends Overlay {
    canvas.drawCircle(pt.x, pt.y, radius, errorCirclePaint);
  }

-  public void drawTrack(Canvas canvas, MapView mapView, Track track,
-      boolean selected) {
-
-    if (track == null) {
-      return;
-    }
-    if (points.size() < 2) {
-      return;
-    }
+  private void drawTrack(Canvas canvas, MapView mapView) {
+    Path path;
+    Point pt = new Point();
+    Location lastValidLocation;
+    int locLon = 0, locLat = 0;
+    GeoPoint firstGeoPoint = null;
+    boolean lastLocValid;

    // Get the current viewing window:
    int w = mapView.getLongitudeSpan();
    int h = mapView.getLatitudeSpan();
    int cx = mapView.getMapCenter().getLongitudeE6();
    int cy = mapView.getMapCenter().getLatitudeE6();
-    Rect rect = new Rect(cx - w, cy - h, cx + w, cy + h);
+    Rect viewRect = new Rect(cx - w, cy - h, cx + w, cy + h);

-    Point pt = new Point();
-    GeoPoint geoPoint;
-    Location loc;
-    Location lastValidLocation = null;
-    Path path;
-    boolean wasInside;
-
-    // Do as much allocation and preparation outside the loop over track
-    // points:
-    wasInside = false;
-    int locLon = 0, locLat = 0, minLon, maxLon, minLat, maxLat;
-    int lastLocLon = (int) (points.get(0).getLongitude() * 1E6);
-    int lastLocLat = (int) (points.get(0).getLatitude() * 1E6);
-
-    // Loop over track points:
-    path = new Path();
-    for (int i = 1; i < points.size(); i++) {
-
-      loc = points.get(i);
-      if (loc == null) {
-        continue;
+    // Global bounding box, including points not visible
+    int allMinLat, allMinLon, allMaxLat, allMaxLon;
+    
+    synchronized (points) {
+      int numPoints = points.size();
+      if (numPoints < 2) {
+        return;
      }
-      locLon = (int) (loc.getLongitude() * 1E6);
-      locLat = (int) (loc.getLatitude() * 1E6);

-      // Draw a line segment if it's inside the viewing window:
-      if (locLat < 90E6 && lastLocLat < 90E6) {
-        lastValidLocation = loc;
-        minLon = Math.min(locLon, lastLocLon);
-        maxLon = Math.max(locLon, lastLocLon);
-        minLat = Math.min(locLat, lastLocLat);
-        maxLat = Math.max(locLat, lastLocLat);
-        if (rect.intersects(minLon, minLat, maxLon, maxLat)) {
-          if (!wasInside) {
-            geoPoint = new GeoPoint(lastLocLat, lastLocLon);
-            mapView.getProjection().toPixels(geoPoint, pt);
-            path.moveTo(pt.x, pt.y);
+      GeoPoint geoPoint;
+      Location loc;
+      int minLon, maxLon, minLat, maxLat;
+      lastValidLocation = points.get(0);
+      int lastLocLon = allMinLon = allMaxLon = (int) (lastValidLocation.getLongitude() * 1E6);
+      int lastLocLat = allMinLat = allMaxLat = (int) (lastValidLocation.getLatitude() * 1E6);
+      lastLocValid = MyTracksUtils.isValidLocation(lastValidLocation);
+      boolean lastLocVisible = false;
+      path = new Path();
+
+      // Loop over track points:
+      path.incReserve(numPoints);
+      for (int i = 1; i < numPoints; i++) {
+        loc = points.get(i);
+
+        boolean locValid = MyTracksUtils.isValidLocation(loc);
+        boolean locVisible = false;
+        if (locValid) {
+          locLon = (int) (loc.getLongitude() * 1E6);
+          locLat = (int) (loc.getLatitude() * 1E6);
+
+          if (firstGeoPoint == null) {
+            // Found the starting point
+            firstGeoPoint = new GeoPoint(locLat, locLon);
+          }
+
+          // If both the current and previous locations were valid
+          if (lastLocValid) {
+            lastValidLocation = loc;
+  
+            // Get the bounding box of the segment about to be drawn
+            if (locLon > lastLocLon) {
+              minLon = lastLocLon;
+              maxLon = locLon;
+            } else {
+              minLon = locLon;
+              maxLon = lastLocLon;
+            }
+            if (locLat > lastLocLat) {
+              minLat = lastLocLat;
+              maxLat = locLat;
+            } else {
+              minLat = locLat;
+              maxLat = lastLocLat;
+            }
+
+            if (drawBounds) {
+              allMaxLat = Math.max(allMaxLat, maxLat);
+              allMinLat = Math.min(allMinLat, minLat);
+              allMaxLon = Math.max(allMaxLon, maxLon);
+              allMinLon = Math.min(allMinLon, minLon);
+            }
+
+            // See if that bounding box intersects the viewable bounding box
+            // Assume that if it does, the location is visible
+            locVisible = viewRect.intersects(minLon, minLat, maxLon, maxLat);
+            if (locVisible) {
+              // If the previous point wasn't drawn, start at its position
+              if (!lastLocVisible) {
+                geoPoint = new GeoPoint(lastLocLat, lastLocLon);
+                mapView.getProjection().toPixels(geoPoint, pt);
+                path.moveTo(pt.x, pt.y);
+              }
+  
+              // Draw a line to the new point
+              geoPoint = new GeoPoint(locLat, locLon);
+              mapView.getProjection().toPixels(geoPoint, pt);
+              path.lineTo(pt.x, pt.y);
+            }
          }
-          geoPoint = new GeoPoint(locLat, locLon);
-          mapView.getProjection().toPixels(geoPoint, pt);
-          path.lineTo(pt.x, pt.y);
-          wasInside = rect.contains(locLon, locLat);
        }
-      } else {
-        wasInside = false;
+        lastLocLon = locLon;
+        lastLocLat = locLat;
+        lastLocValid = locValid;
+        lastLocVisible = locVisible;
      }
-      lastLocLon = locLon;
-      lastLocLat = locLat;
    }
+
    canvas.drawPath(path, selectedTrackPaint);

+    if (drawBounds) {
+      drawBoundingBox(canvas, mapView,
+          allMinLat, allMinLon, allMaxLat, allMaxLon);
+    }
+
    // Draw the "End" marker:
-    Location currentLastValidLocation = lastValidLocation;
-    if (showEndMarker && currentLastValidLocation != null) {
+    if (showEndMarker && lastValidLocation != null) {
      canvas.save();
-      geoPoint = MyTracksUtils.getGeoPoint(currentLastValidLocation);
+      GeoPoint geoPoint = MyTracksUtils.getGeoPoint(lastValidLocation);
      mapView.getProjection().toPixels(geoPoint, pt);
      canvas.translate(pt.x - (markerWidth / 2), pt.y - markerHeight);
      endMarker.draw(canvas);
@@ -290,22 +349,46 @@ public class MyTracksOverlay extends Overlay {
    }

    // Draw the "Start" marker:
-    for (int i = 0; i < points.size(); i++) {
-      loc = points.get(i);
-      if (loc.getLatitude() < 90) {
-        locLon = (int) (loc.getLongitude() * 1E6);
-        locLat = (int) (loc.getLatitude() * 1E6);
-        geoPoint = new GeoPoint(locLat, locLon);
-        mapView.getProjection().toPixels(geoPoint, pt);
-        canvas.save();
-        canvas.translate(pt.x - (markerWidth / 2), pt.y - markerHeight);
-        startMarker.draw(canvas);
-        canvas.restore();
-        break;
-      }
+    if (firstGeoPoint != null) {
+      mapView.getProjection().toPixels(firstGeoPoint, pt);
+      canvas.save();
+      canvas.translate(pt.x - (markerWidth / 2), pt.y - markerHeight);
+      startMarker.draw(canvas);
+      canvas.restore();
    }
  }

+  private void drawBoundingBox(Canvas canvas, MapView mapView, int allMinLat,
+      int allMinLon, int allMaxLat, int allMaxLon) {
+    // Transform coordinates
+    GeoPoint maxPoint = new GeoPoint(allMaxLat, allMaxLon);
+    GeoPoint minPoint = new GeoPoint(allMinLat, allMinLon);
+    Point minPt = new Point();
+    Point maxPt = new Point();
+    mapView.getProjection().toPixels(minPoint, minPt);
+    mapView.getProjection().toPixels(maxPoint, maxPt);
+    Rect allBounds = new Rect(minPt.x, minPt.y, maxPt.x, maxPt.y);
+
+    // Prepare a green paint
+    Paint boundingBoxPaint = new Paint();
+    boundingBoxPaint.setColor(context.getResources().getColor(R.color.green));
+    boundingBoxPaint.setStrokeWidth(2);
+    boundingBoxPaint.setStyle(Paint.Style.STROKE);
+    boundingBoxPaint.setAntiAlias(true);
+
+    // Disable clipping
+    canvas.save();
+    canvas.clipRect(Float.NEGATIVE_INFINITY, Float.NEGATIVE_INFINITY,
+                    Float.POSITIVE_INFINITY, Float.POSITIVE_INFINITY,
+                    Region.Op.REPLACE);
+
+    // Draw the bounding box
+    canvas.drawRect(allBounds, boundingBoxPaint);
+
+    // Re-enable clipping
+    canvas.restore();
+  }
+
  @Override
  public boolean draw(Canvas canvas, MapView mapView, boolean shadow,
      long when) {
@@ -374,4 +457,8 @@ public class MyTracksOverlay extends Overlay {
    }
    return super.onTap(p, mapView);
  }
+
+  public void setDrawBounds(boolean drawBounds) {
+    this.drawBounds = drawBounds;
+  }
 }
@@ -115,7 +115,7 @@ public class MyTracksSettings extends PreferenceActivity {
      announcementFrequency.setEnabled(false);
      announcementFrequency.setValue("-1");
      announcementFrequency.setSummary(
-          R.string.settings_announcement_not_available_summary);
+          R.string.settings_not_available_summary);
    }
  }

@@ -135,7 +135,6 @@ public class MyTracksWaypointDetails extends Activity
          iconId = R.drawable.ylw_pushpin;
          TripStatistics waypointStats = waypoint.getStatistics();
          utils.setAllStats(waypointStats);
-          utils.setTime(R.id.total_time_register, waypointStats.getTotalTime());
          utils.setAltitude(
              R.id.elevation_register, waypoint.getLocation().getAltitude());
          break;
@@ -15,8 +15,6 @@
 */
 package com.google.android.apps.mytracks;

-import com.google.android.maps.mytracks.R;
-
 import android.content.Context;
 import android.graphics.drawable.Drawable;
 import android.os.Handler;
@@ -50,24 +48,22 @@ public class NavControls {

  /**
   * A touchable image view.
+   * When touched it changes the navigation control icons accordingly.
   */
-  public class TouchLayout extends RelativeLayout {
-    private final ImageView arrow;
+  private class TouchLayout extends RelativeLayout implements Runnable {
+    private final boolean isLeft;
    private final ImageView icon;

    public TouchLayout(Context context, boolean isLeft) {
      super(context);
-      arrow = new ImageView(context);
-      arrow.setImageDrawable(context.getResources().getDrawable(
-          isLeft ? R.drawable.btn_arrow_left : R.drawable.btn_arrow_right));
-      icon = new ImageView(context);
+      this.isLeft = isLeft;
+      this.icon = new ImageView(context);
      icon.setVisibility(View.GONE);
-      addView(arrow);
      addView(icon);
-      icon.setPadding((isLeft ? 15 : 10), 27, 15, 0);
    }

-    public void setIcon(Drawable drawable) {
+    public void setIcon(int iconId) {
+      Drawable drawable = getContext().getResources().getDrawable(iconId);
      icon.setImageDrawable(drawable);
      icon.setVisibility(View.VISIBLE);
    }
@@ -77,18 +73,11 @@ public class NavControls {
      switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
          setPressed(true);
-          hide();
-          if (this == prevImage) {
-            if (prevRunnable != null) {
-              handler.post(prevRunnable);
-              return true;
-            }
-          } else if (this == nextImage) {
-            if (nextRunnable != null) {
-              handler.post(nextRunnable);
-              return true;
-            }
-          }
+          shiftIcons(isLeft);
+
+          // Call the user back
+          handler.post(this);
+
          break;
        case MotionEvent.ACTION_UP:
          setPressed(false);
@@ -96,55 +85,69 @@ public class NavControls {
      }
      return super.onTouchEvent(event);
    }
+
+    @Override
+    public void run() {
+      touchRunnable.run();
+      setPressed(false);
+    }
  }

-  private final Context context;
-  private final Runnable prevRunnable;
-  private final Runnable nextRunnable;
  private final Handler handler = new Handler();
  private final Runnable dismissControls = new Runnable() {
    public void run() {
      hide();
    }
  };
+
  private final TouchLayout prevImage;
  private final TouchLayout nextImage;
+  private final int[] leftIcons;
+  private final int[] rightIcons;
+  private final Runnable touchRunnable;

  private boolean isVisible = false;
-  private boolean hasNext = true;
-  private boolean hasPrev = true;
+  private int currentIcons;

  public NavControls(Context context, ViewGroup container,
-      Runnable prevRunnable, Runnable nextRunnable) {
-    this.context = context;
-    this.prevRunnable = prevRunnable;
-    this.nextRunnable = nextRunnable;
+      int[] leftIcons, int[] rightIcons,
+      Runnable touchRunnable) {
+    this.leftIcons = leftIcons;
+    this.rightIcons = rightIcons;
+    this.touchRunnable = touchRunnable;
+
+    if (leftIcons.length != rightIcons.length || leftIcons.length < 1) {
+      throw new IllegalArgumentException("Invalid icons specified");
+    }
+    if (touchRunnable == null) {
+      throw new NullPointerException("Runnable cannot be null");
+    }
+
    LayoutParams prevParams = new LayoutParams(
        LayoutParams.WRAP_CONTENT,
        LayoutParams.WRAP_CONTENT);
-    prevParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
-    prevParams.addRule(RelativeLayout.CENTER_VERTICAL);
-    prevImage = new TouchLayout(context, true);
-    prevImage.setLayoutParams(prevParams);
-    prevImage.setVisibility(View.INVISIBLE);
-    container.addView(prevImage);
    LayoutParams nextParams = new LayoutParams(
        LayoutParams.WRAP_CONTENT,
        LayoutParams.WRAP_CONTENT);
+
+    prevParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
    nextParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
+    prevParams.addRule(RelativeLayout.CENTER_VERTICAL);
    nextParams.addRule(RelativeLayout.CENTER_VERTICAL);
+
    nextImage = new TouchLayout(context, false);
+    prevImage = new TouchLayout(context, true);
    nextImage.setLayoutParams(nextParams);
+    prevImage.setLayoutParams(prevParams);
    nextImage.setVisibility(View.INVISIBLE);
+    prevImage.setVisibility(View.INVISIBLE);
+
+    container.addView(prevImage);
    container.addView(nextImage);
-  }

-  public void setHasNext(boolean hasNext) {
-    this.hasNext = hasNext;
-  }
-
-  public void setHasPrev(boolean hasPrev) {
-    this.hasPrev = hasPrev;
+    prevImage.setIcon(leftIcons[0]);
+    nextImage.setIcon(rightIcons[0]);
+    this.currentIcons = 0;
  }

  private void keepVisible() {
@@ -156,20 +159,18 @@ public class NavControls {

  public void show() {
    if (!isVisible) {
-      if (prevRunnable != null && hasPrev) {
-        SHOW_PREV_ANIMATION.setDuration(500);
-        SHOW_PREV_ANIMATION.startNow();
-        prevImage.setPressed(false);
-        prevImage.setAnimation(SHOW_PREV_ANIMATION);
-        prevImage.setVisibility(View.VISIBLE);
-      }
-      if (nextRunnable != null && hasNext) {
-        SHOW_NEXT_ANIMATION.setDuration(500);
-        SHOW_NEXT_ANIMATION.startNow();
-        nextImage.setPressed(false);
-        nextImage.setAnimation(SHOW_NEXT_ANIMATION);
-        nextImage.setVisibility(View.VISIBLE);
-      }
+      SHOW_PREV_ANIMATION.setDuration(500);
+      SHOW_PREV_ANIMATION.startNow();
+      prevImage.setPressed(false);
+      prevImage.setAnimation(SHOW_PREV_ANIMATION);
+      prevImage.setVisibility(View.VISIBLE);
+
+      SHOW_NEXT_ANIMATION.setDuration(500);
+      SHOW_NEXT_ANIMATION.startNow();
+      nextImage.setPressed(false);
+      nextImage.setAnimation(SHOW_NEXT_ANIMATION);
+      nextImage.setVisibility(View.VISIBLE);
+
      isVisible = true;
      keepVisible();
    } else {
@@ -188,33 +189,25 @@ public class NavControls {

  public void hide() {
    isVisible = false;
-    if (prevRunnable != null) {
-      if (hasPrev) {
-        prevImage.setAnimation(HIDE_PREV_ANIMATION);
-        HIDE_PREV_ANIMATION.setDuration(500);
-        HIDE_PREV_ANIMATION.startNow();
-      } else {
-        prevImage.clearAnimation();
-      }
-      prevImage.setVisibility(View.INVISIBLE);
-    }
-    if (nextRunnable != null) {
-      if (hasNext) {
-        nextImage.setAnimation(HIDE_NEXT_ANIMATION);
-        HIDE_NEXT_ANIMATION.setDuration(500);
-        HIDE_NEXT_ANIMATION.startNow();
-      } else {
-        nextImage.clearAnimation();
-      }
-      nextImage.setVisibility(View.INVISIBLE);
-    }
+    prevImage.setAnimation(HIDE_PREV_ANIMATION);
+    HIDE_PREV_ANIMATION.setDuration(500);
+    HIDE_PREV_ANIMATION.startNow();
+    prevImage.setVisibility(View.INVISIBLE);
+
+    nextImage.setAnimation(HIDE_NEXT_ANIMATION);
+    HIDE_NEXT_ANIMATION.setDuration(500);
+    HIDE_NEXT_ANIMATION.startNow();
+    nextImage.setVisibility(View.INVISIBLE);
  }

-  public void setLeftIcon(int resourceId) {
-    prevImage.setIcon(context.getResources().getDrawable(resourceId));
+  public int getCurrentIcons() {
+    return currentIcons;
  }

-  public void setRightIcon(int resourceId) {
-    nextImage.setIcon(context.getResources().getDrawable(resourceId));
+  private void shiftIcons(boolean isLeft) {
+    // Increment or decrement by one, with wrap around
+    currentIcons = (currentIcons + leftIcons.length + (isLeft ? -1 : 1)) % leftIcons.length;
+    prevImage.setIcon(leftIcons[currentIcons]);
+    nextImage.setIcon(rightIcons[currentIcons]);
  }
 }
@@ -49,14 +49,12 @@ import android.widget.Toast;
 * @author Sandor Dornbush
 */
 public class StatsActivity extends Activity
-    implements OnSharedPreferenceChangeListener, LocationListener {
-
+    implements OnSharedPreferenceChangeListener {

  private final StatsUtilities utils;
  private UIUpdateThread thread;

  private ContentObserver observer;
-  private LocationManager locationManager;

  /**
   * The id of the currently selected track.
@@ -96,7 +94,6 @@ public class StatsActivity extends Activity
  private boolean showCurrentSegment = false;

  private final MyTracksProviderUtils providerUtils;
-  private Track track = null;

  /**
   * A runnable for posting to the UI thread. Will update the total time field.
@@ -179,11 +176,9 @@ public class StatsActivity extends Activity
        preferences.getBoolean(getString(R.string.report_speed_key), true);
      checkLiveTrack();
      restoreStats();
-      updateLocation(null);
+      showUnknownLocation();
      preferences.registerOnSharedPreferenceChangeListener(this);
    }
-    locationManager =
-        (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    utils.setMetricUnits(metricUnits);
    utils.setReportSpeed(displaySpeed);
    utils.updateUnits();
@@ -214,7 +209,7 @@ public class StatsActivity extends Activity
    activityOnTop = true;
    checkLiveTrack();
    restoreStats();
-    updateLocation(null);
+    showUnknownLocation();
    super.onResume();
  }

@@ -234,7 +229,7 @@ public class StatsActivity extends Activity
                    -1);
            checkLiveTrack();
            restoreStats();
-            updateLocation(null);
+            showUnknownLocation();
          } else if (key.equals(getString(R.string.recording_track_key))) {
            recordingTrackId =
                sharedPreferences.getLong(
@@ -242,7 +237,7 @@ public class StatsActivity extends Activity
                    -1);
            checkLiveTrack();
            restoreStats();
-            updateLocation(null);
+            showUnknownLocation();
          } else if (key.equals(getString(R.string.metric_units_key))) {
            metricUnits =
                sharedPreferences.getBoolean(
@@ -299,29 +294,36 @@ public class StatsActivity extends Activity
    return super.onOptionsItemSelected(item);
  }

-  @Override
-  public void onLocationChanged(Location l) {
-    if (selectedTrackIsRecording()) {
-      updateLocation(l);
+  private final LocationListener locationListener = new LocationListener() {
+    @Override
+    public void onLocationChanged(Location l) {
+      if (selectedTrackIsRecording()) {
+        showLocation(l);
+      }
    }
-  }
-
-  @Override
-  public void onProviderDisabled(String provider) {
-  }
-
-  @Override
-  public void onProviderEnabled(String provider) {
-  }
-
-  @Override
-  public void onStatusChanged(String provider, int status, Bundle extras) {
-  }
+  
+    @Override
+    public void onProviderDisabled(String provider) {
+      // Do nothing
+    }
+  
+    @Override
+    public void onProviderEnabled(String provider) {
+      // Do nothing
+    }
+  
+    @Override
+    public void onStatusChanged(String provider, int status, Bundle extras) {
+      // Do nothing
+    }
+  };

  /**
   * Registers to receive location updates from the GPS location provider.
   */
  private void registerLocationListener() {
+    LocationManager locationManager =
+        (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    if (locationManager != null) {
      LocationProvider gpsProvider =
          locationManager.getProvider(MyTracksConstants.GPS_PROVIDER);
@@ -334,7 +336,7 @@ public class StatsActivity extends Activity
            + gpsProvider.getName());
      }
      locationManager.requestLocationUpdates(gpsProvider.getName(),
-         0/*minTime*/, 0/*minDist*/, this);
+         0/*minTime*/, 0/*minDist*/, locationListener);
    }
  }

@@ -342,8 +344,10 @@ public class StatsActivity extends Activity
   * Unregisters all location listener.
   */
  private void unregisterLocationListener() {
+    LocationManager locationManager =
+        (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    if (locationManager != null) {
-      locationManager.removeUpdates(this);
+      locationManager.removeUpdates(locationListener);
    }
  }

@@ -364,7 +368,7 @@ public class StatsActivity extends Activity
      return;
    }

-    track = providerUtils.getTrack(selectedTrackId);
+    Track track = providerUtils.getTrack(selectedTrackId);
    if (track == null || track.getStatistics() == null) {
      utils.setAllToUnknown();
      return;
@@ -421,17 +425,17 @@ public class StatsActivity extends Activity
   *
   * @param l may be null (will set location fields to unknown)
   */
-  private void updateLocation(Location l) {
-    if (l == null) {
-      utils.setUnknown(R.id.elevation_register);
-      utils.setUnknown(R.id.latitude_register);
-      utils.setUnknown(R.id.longitude_register);
-      utils.setUnknown(R.id.speed_register);
-    } else {
-      utils.setAltitude(R.id.elevation_register, l.getAltitude());
-      utils.setLatLong(R.id.latitude_register, l.getLatitude());
-      utils.setLatLong(R.id.longitude_register, l.getLongitude());
-      utils.setSpeed(R.id.speed_register, l.getSpeed() * 3.6);
-    }
+  private void showLocation(Location l) {
+    utils.setAltitude(R.id.elevation_register, l.getAltitude());
+    utils.setLatLong(R.id.latitude_register, l.getLatitude());
+    utils.setLatLong(R.id.longitude_register, l.getLongitude());
+    utils.setSpeed(R.id.speed_register, l.getSpeed() * 3.6);
+  }
+
+  private void showUnknownLocation() {
+    utils.setUnknown(R.id.elevation_register);
+    utils.setUnknown(R.id.latitude_register);
+    utils.setUnknown(R.id.longitude_register);
+    utils.setUnknown(R.id.speed_register);
  }
 }
@@ -20,13 +20,13 @@ import com.google.android.apps.mytracks.util.StringUtils;
 import com.google.android.apps.mytracks.util.UnitConversions;
 import com.google.android.maps.mytracks.R;

+import java.text.DecimalFormat;
+import java.text.NumberFormat;
+
 import android.app.Activity;
 import android.util.Log;
 import android.widget.TextView;

-import java.text.DecimalFormat;
-import java.text.NumberFormat;
-
 /**
 * Various utility functions for views that display statistics information.
 *
@@ -218,7 +218,7 @@ public class StatsUtilities {
    setGrade(R.id.max_grade_register, maxGrade);
  }

-  public void setAllStats(TripStatistics stats) {
+	public void setAllStats(TripStatistics stats) {
    setTime(R.id.moving_time_register, stats.getMovingTime());
    setDistance(R.id.total_distance_register, stats.getTotalDistance() / 1000);
    setSpeed(R.id.average_speed_register, stats.getAverageSpeed() * 3.6);
@@ -230,6 +230,8 @@ public class StatsUtilities {
    setAltitude(R.id.elevation_gain_register, stats.getTotalElevationGain());
    setGrade(R.id.min_grade_register, stats.getMinGrade());
    setGrade(R.id.max_grade_register, stats.getMaxGrade());
+    setTime(R.id.total_time_register, stats.getTotalTime());
+    
  }

  public void setSpeedLabel(int id, int speedString, int paceString) {
@@ -21,6 +21,8 @@ import android.database.Cursor;
 import android.location.Location;
 import android.net.Uri;

+import java.util.List;
+
 /**
 * Utility to access data from the mytracks content provider.
 *
@@ -184,6 +186,15 @@ public interface MyTracksProviderUtils {
   * @return a Track object, or null if not found
   */
  Track getTrack(long id);
+  
+  /**
+   * Retrieves all tracks without track points. If no tracks exist an empty
+   * list will be returned. Use {@link #getTrackPoints(Track, int)} to load
+   * the track points.
+   * 
+   * @return a list of all the recorded tracks
+   */
+  List<Track> getAllTracks();

  /**
   * Loads the track points for a given track.
@@ -203,9 +214,24 @@ public interface MyTracksProviderUtils {
   *
   * @param track to load locations for
   * @param buffer an array of locations to fill
+   * @deprecated use {@link #fillTrackPoints} instead
   */
+  @Deprecated
  void getTrackPoints(Track track, TrackBuffer buffer);

+  /**
+   * Fetches some number of locations for the given track.
+   *
+   * This is designed to be used to stream through large tracks without loading
+   * all points into memory.
+   * This method will reuse the Location objects in the buffer.  If you need a
+   * Location object copy the object.
+   *
+   * @param track to load locations for
+   * @param buffer an array of locations to fill
+   */
+  void fillTrackPoints(Track track, TrackBuffer buffer);
+
  /**
   * Creates a cursor over the tracks provider with a given selection.
   * Caller gets to own the returned cursor. Don't forget to close it.
@@ -293,7 +319,15 @@ public interface MyTracksProviderUtils {
   * @return a new location object
   */
  Location createLocation(Cursor cursor);
-
+  
+  /**
+   * Fill a location object with values from a given cursor.
+   * 
+   * @param cursor a cursor pointing at a db or provider with locations
+   * @param location a location object to be overwritten
+   */
+  void fillLocation(Cursor cursor, Location location);
+  
  /**
   * Creates a waypoint object from a given cursor.
   *
@@ -24,6 +24,9 @@ import android.location.Location;
 import android.net.Uri;
 import android.util.Log;

+import java.util.ArrayList;
+import java.util.List;
+
 /**
 * Helper class providing easy access to locations and tracks in the
 * MyTracksProvider. All static members.
@@ -168,6 +171,15 @@ public class MyTracksProviderUtilsImpl implements MyTracksProviderUtils {

  @Override
  public Location createLocation(Cursor cursor) {
+    Location location = new Location("");
+    fillLocation(cursor, location);
+    return location;
+  }
+  
+  @Override
+  public void fillLocation(Cursor cursor, Location location) {
+    location.reset();
+
    int idxLatitude = cursor.getColumnIndexOrThrow(TrackPointsColumns.LATITUDE);
    int idxLongitude =
        cursor.getColumnIndexOrThrow(TrackPointsColumns.LONGITUDE);
@@ -177,7 +189,6 @@ public class MyTracksProviderUtilsImpl implements MyTracksProviderUtils {
    int idxAccuracy = cursor.getColumnIndexOrThrow(TrackPointsColumns.ACCURACY);
    int idxSpeed = cursor.getColumnIndexOrThrow(TrackPointsColumns.SPEED);

-    Location location = new Location("");
    if (!cursor.isNull(idxLatitude)) {
      location.setLatitude(1. * cursor.getInt(idxLatitude) / 1E6);
    }
@@ -199,7 +210,6 @@ public class MyTracksProviderUtilsImpl implements MyTracksProviderUtils {
    if (!cursor.isNull(idxAccuracy)) {
      location.setAccuracy(cursor.getFloat(idxAccuracy));
    }
-    return location;
  }

  @Override
@@ -790,6 +800,21 @@ public class MyTracksProviderUtilsImpl implements MyTracksProviderUtils {
    String select = TracksColumns._ID + "=" + id;
    return findTrackBy(select);
  }
+  
+  @Override
+  public List<Track> getAllTracks() {
+    Cursor cursor = getTracksCursor(null);
+    if (cursor == null || !cursor.moveToFirst()) {
+      return new ArrayList<Track>();
+    }
+
+    List<Track> tracks = new ArrayList<Track>(cursor.getCount());
+    do {
+      tracks.add(createTrack(cursor));
+    } while(cursor.moveToNext());
+
+    return tracks;
+  }

  @Override
  public long getTrackPoints(Track track, int maxPoints) {
@@ -822,6 +847,16 @@ public class MyTracksProviderUtilsImpl implements MyTracksProviderUtils {

  @Override
  public void getTrackPoints(Track track, TrackBuffer buffer) {
+    getTrackPoints(track, buffer, false);
+  }
+  
+  @Override
+  public void fillTrackPoints(Track track, TrackBuffer buffer) {
+    getTrackPoints(track, buffer, true);
+  }
+
+  public void getTrackPoints(Track track, TrackBuffer buffer,
+      boolean reuseLocations) {
    long startingPoint = buffer.getLastLocationRead() == 0 ? track.getStartId()
        : buffer.getLastLocationRead();
    buffer.reset();
@@ -849,13 +884,17 @@ public class MyTracksProviderUtilsImpl implements MyTracksProviderUtils {
      final int idColumnIdx =
          cursor.getColumnIndexOrThrow(TrackPointsColumns._ID);
      do {
-        Location location = createLocation(cursor);
-        if (location == null) {
-          continue;
+        if (reuseLocations) {
+          fillLocation(cursor, buffer.add(cursor.getLong(idColumnIdx)));
+        } else {
+          Location location = createLocation(cursor);
+          if (location == null) {
+            continue;
+          }
+          buffer.add(location, cursor.getLong(idColumnIdx));
        }
-        buffer.add(location, cursor.getLong(idColumnIdx));
      } while (cursor.moveToNext());
-      
+
      if (buffer.getLocationsLoaded() == 0) {
        Log.w(MyTracksProvider.TAG, "No locations read.");
        buffer.resetAt(startingPoint + buffer.getSize());
@@ -94,6 +94,22 @@ public class TrackBuffer {
    buffer[locationsLoaded++] = location;
    lastLocationRead = Math.max(lastLocationRead, id);
  }
+  
+  /**
+   * Get a location from the end of the buffer.
+   * This may reuse Location objects already allocated to the buffer.
+   * @param locationId The of the location to be added.
+   * @return The location object associated with the give id.
+   */
+  public Location add(long locationId) {
+    lastLocationRead = Math.max(lastLocationRead, locationId);
+    if (buffer[locationsLoaded] == null) {
+      buffer[locationsLoaded] = new Location("");
+    } else {
+      buffer[locationsLoaded].reset();
+    }
+    return buffer[locationsLoaded++];
+  }

  /**
   * @return The id of the last location loaded into the buffer
@@ -264,7 +264,7 @@ public class TrackWriter {
    while (buffer.getLastLocationRead() < track.getStopId()) {
      Log.d(MyTracksConstants.TAG,
          "Reading track points starting at: " + buffer.getLastLocationRead());
-      providerUtils.getTrackPoints(track, buffer);
+      providerUtils.fillTrackPoints(track, buffer);
      if (!wroteFirst) {
        Location first = buffer.findStartLocation();
        writer.writeBeginTrack(first);
@@ -103,4 +103,9 @@ public class ExtremityMonitor {
  public void setMax(double max) {
    this.max = max;
  }
+  
+  @Override
+  public String toString() {
+    return "Min: " + min + " Max: " + max;
+  }
 }
@@ -326,7 +326,7 @@ public class TrackWriterTest extends AndroidTestCase {
   *        will be fed into the track buffer on each call
   */
  private void stubBufferFill(final Location[]... feeds) {
-    providerUtils.getTrackPoints(same(track), isA(TrackBuffer.class));
+    providerUtils.fillTrackPoints(same(track), isA(TrackBuffer.class));
    EasyMock.expectLastCall().andStubAnswer(new IAnswer<Void>() {
      private int lastId = 1;
      private int reads = 0;