Use a location image button on the map view to show current location.

MyTracks/res/drawable/my_location.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2012 Google Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+  <item android:state_pressed="true"
+        android:drawable="@drawable/my_location_pressed" />
+  <item android:drawable="@drawable/my_location_normal" />
+</selector>

MyTracks/res/layout/map.xml

@@ -26,6 +26,16 @@ limitations under the License.
     android:id="@+id/map_view"
     android:layout_height="fill_parent"
     android:layout_width="fill_parent" />
+  <ImageButton
+    android:background="@drawable/my_location"
+    android:contentDescription="@string/my_location"
+    android:id="@+id/map_my_location"
+    android:layout_alignParentTop="true"
+    android:layout_alignParentRight="true"
+    android:layout_height="wrap_content"
+    android:layout_marginRight="8dp"
+    android:layout_marginTop="8dp"
+    android:layout_width="wrap_content" />
   <TextView
     android:background="@color/warning_background"
     android:drawableLeft="@android:drawable/ic_dialog_alert"

MyTracks/res/menu/track_detail.xml

@@ -76,10 +76,6 @@ limitations under the License.
     android:icon="@drawable/menu_delete"
     android:id="@+id/track_detail_delete"
     android:title="@string/menu_delete"/>
-  <item
-    android:icon="@drawable/menu_my_location"
-    android:id="@+id/track_detail_my_location"
-    android:title="@string/menu_my_location"/>
   <item
     android:icon="@drawable/menu_satellite_mode"
     android:id="@+id/track_detail_satellite_mode"

MyTracks/res/values/strings.xml

@@ -1070,10 +1070,6 @@ limitations under the License.
     translation_description="In the menu, to show a list of markers for the current track.">
     Markers
   </string>
-  <string name="menu_my_location"
-    translation_description="In the menu, to display the user's current location.">
-    My location
-  </string>
   <string name="menu_play"
     translation_description="In the menu, to play a track.">
     Play
@@ -1155,6 +1151,11 @@ limitations under the License.
   </string>
 
   <!-- My Location -->
+  <string name="my_location"
+    translation_description="The accessibility description for the My Location button on the map
+      view.">
+    My Location
+  </string>
   <string name="my_location_approximate_location"
     translation_description="When displaying the user's current location, a status message
       indicating that GPS is not available and an approximate location is used instead.">

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

@@ -237,9 +237,7 @@ public class TrackDetailActivity extends AbstractMyTracksActivity
     menu.findItem(R.id.track_detail_chart_settings).setVisible(
         ChartFragment.CHART_FRAGMENT_TAG.equals(currentTabTag));
     menu.findItem(R.id.track_detail_stats_settings).setVisible(
-        StatsFragment.STATS_FRAGMENT_TAG.equals(currentTabTag));
-    menu.findItem(R.id.track_detail_my_location)
-        .setVisible(MapFragment.MAP_FRAGMENT_TAG.equals(currentTabTag));
+        StatsFragment.STATS_FRAGMENT_TAG.equals(currentTabTag));   
     MenuItem satelliteMode = menu.findItem(R.id.track_detail_satellite_mode)
         .setVisible(MapFragment.MAP_FRAGMENT_TAG.equals(currentTabTag));
     
@@ -343,13 +341,6 @@ public class TrackDetailActivity extends AbstractMyTracksActivity
         DeleteOneTrackDialogFragment.newInstance(trackId).show(
             getSupportFragmentManager(), DeleteOneTrackDialogFragment.DELETE_ONE_TRACK_DIALOG_TAG);
         return true;
-      case R.id.track_detail_my_location:
-        mapFragment = (MapFragment) getSupportFragmentManager()
-            .findFragmentByTag(MapFragment.MAP_FRAGMENT_TAG);
-        if (mapFragment != null) {
-          mapFragment.showMyLocation();
-        }
-        return true;
       case R.id.track_detail_satellite_mode:
         mapFragment = (MapFragment) getSupportFragmentManager()
             .findFragmentByTag(MapFragment.MAP_FRAGMENT_TAG);

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

@@ -43,6 +43,7 @@ import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.ImageButton;
 import android.widget.TextView;
 import android.widget.Toast;
 
@@ -86,6 +87,7 @@ public class MapFragment extends Fragment
   private View mapViewContainer;
   private MapOverlay mapOverlay;
   private MapView mapView;
+  private ImageButton myLocationImageButton;
   private TextView messageTextView;
 
   @Override
@@ -100,6 +102,13 @@ public class MapFragment extends Fragment
     mapView.setOnTouchListener(this);
     mapView.setBuiltInZoomControls(true);
     mapView.getOverlays().add(mapOverlay);
+    myLocationImageButton = (ImageButton) mapViewContainer.findViewById(R.id.map_my_location);
+    myLocationImageButton.setOnClickListener(new View.OnClickListener() {
+      @Override
+      public void onClick(View v) {
+        showMyLocation();       
+      }
+    });
     messageTextView = (TextView) mapViewContainer.findViewById(R.id.map_message);
 
     return mapViewContainer;
@@ -150,7 +159,7 @@ public class MapFragment extends Fragment
   /**
    * Shows my location.
    */
-  public void showMyLocation() {
+  private void showMyLocation() {
     updateTrackDataHub();
     keepMyLocationVisible = true;
     zoomToMyLocation = true;