Add contextual menu.

API < 11, use floating context menu.
API >=11, use contextual action mode.

MyTracks/res/menu/track_list_context_menu.xml

@@ -0,0 +1,28 @@
+<?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.
+-->
+<menu xmlns:android="http://schemas.android.com/apk/res/android" >
+  <item
+    android:icon="@drawable/menu_edit"
+    android:id="@+id/track_list_context_menu_edit"
+    android:showAsAction="always"
+    android:title="@string/menu_edit"/>
+  <item
+    android:icon="@drawable/menu_delete"
+    android:id="@+id/track_list_context_menu_delete"
+    android:showAsAction="always"
+    android:title="@string/menu_delete"/>
+</menu>

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

@@ -18,6 +18,7 @@ package com.google.android.apps.mytracks;
 
 import com.google.android.apps.mytracks.content.TracksColumns;
 import com.google.android.apps.mytracks.fragments.DeleteAllTrackDialogFragment;
+import com.google.android.apps.mytracks.fragments.DeleteOneTrackDialogFragment;
 import com.google.android.apps.mytracks.fragments.EulaDialogFragment;
 import com.google.android.apps.mytracks.io.file.TrackWriterFactory.TrackFileFormat;
 import com.google.android.apps.mytracks.services.ITrackRecordingService;
@@ -43,11 +44,14 @@ import android.support.v4.content.CursorLoader;
 import android.support.v4.content.Loader;
 import android.support.v4.widget.ResourceCursorAdapter;
 import android.util.Log;
+import android.view.ContextMenu;
+import android.view.ContextMenu.ContextMenuInfo;
 import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.AdapterView;
+import android.widget.AdapterView.AdapterContextMenuInfo;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.ListView;
 import android.widget.TextView;
@@ -122,6 +126,15 @@ public class TrackListActivity extends FragmentActivity {
     }
   };
   
+  // Callback when an item is selected in the contextual action mode
+  private ContextualActionModeCallback contextualActionModeCallback =
+    new ContextualActionModeCallback() {
+    @Override
+    public boolean onClick(int itemId, long id) {
+      return handleContextItem(itemId, id);
+    }
+  };
+  
   private TrackRecordingServiceConnection trackRecordingServiceConnection;
   private SharedPreferences sharedPreferences;
   private boolean metricUnits;
@@ -202,6 +215,8 @@ public class TrackListActivity extends FragmentActivity {
       }
     };
     listView.setAdapter(adapter);
+    ApiAdapterFactory.getApiAdapter().configureContextualMenu(
+        this, listView, R.menu.track_list_context_menu, contextualActionModeCallback);
    
     getSupportLoaderManager().initLoader(0, null, new LoaderCallbacks<Cursor>() {
       @Override
@@ -354,6 +369,42 @@ public class TrackListActivity extends FragmentActivity {
     }
   }
 
+  @Override
+  public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
+    super.onCreateContextMenu(menu, v, menuInfo);
+    getMenuInflater().inflate(R.menu.track_list_context_menu, menu);
+  }
+  
+  @Override
+  public boolean onContextItemSelected(MenuItem item) {
+    if (handleContextItem(item.getItemId(), ((AdapterContextMenuInfo) item.getMenuInfo()).id)) {
+      return true;
+    }
+    return super.onContextItemSelected(item);
+  }
+  
+  /**
+   * Handles a context item selection.
+   *
+   * @param itemId the menu item id
+   * @param trackId the track id
+   * @return true if handled.
+   */
+  private boolean handleContextItem(int itemId, long trackId) {
+    switch (itemId) {
+      case R.id.track_list_context_menu_edit:
+        startActivity(new Intent(this, TrackEditActivity.class).putExtra(
+            TrackEditActivity.EXTRA_TRACK_ID, trackId));
+        return true;
+      case R.id.track_list_context_menu_delete:
+        DeleteOneTrackDialogFragment.newInstance(trackId).show(
+            getSupportFragmentManager(), DeleteOneTrackDialogFragment.DELETE_ONE_TRACK_DIALOG_TAG);
+        return true;
+      default:
+        return false;
+    }
+  }
+  
   /**
    * Starts {@link TrackDetailActivity}.
    * 

MyTracks/src/com/google/android/apps/mytracks/util/Api11Adapter.java

@@ -16,12 +16,19 @@
 
 package com.google.android.apps.mytracks.util;
 
+import com.google.android.apps.mytracks.ContextualActionModeCallback;
+
 import android.annotation.TargetApi;
-import android.app.ActionBar;
 import android.app.Activity;
 import android.app.SearchManager;
 import android.content.Context;
+import android.view.ActionMode;
+import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemLongClickListener;
+import android.widget.ListView;
 import android.widget.SearchView;
 
 /**
@@ -42,6 +49,45 @@ public class Api11Adapter extends Api10Adapter {
     activity.getActionBar().setDisplayHomeAsUpEnabled(true);
   }
 
+  @Override
+  public void configureContextualMenu(final Activity activity, ListView listView, final int menuId,
+      final ContextualActionModeCallback contextualActionModeCallback) {
+    listView.setOnItemLongClickListener(new OnItemLongClickListener() {
+      ActionMode actionMode;
+
+      @Override
+      public boolean onItemLongClick(
+          AdapterView<?> parent, View view, int position, final long id) {
+        if (actionMode != null) { return false; }
+        actionMode = activity.startActionMode(new ActionMode.Callback() {
+          @Override
+          public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+            mode.getMenuInflater().inflate(menuId, menu);
+            return true;
+          }
+
+          @Override
+          public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+            // Return false to indicate no change.
+            return false;
+          }
+
+          @Override
+          public void onDestroyActionMode(ActionMode mode) {
+            actionMode = null;
+          }
+
+          @Override
+          public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+            return contextualActionModeCallback.onClick(item.getItemId(), id);
+          }
+        });
+        view.setSelected(true);
+        return true;
+      }
+    });
+  };
+  
   @Override
   public void configureSearchWidget(Activity activity, MenuItem menuItem) {
     SearchManager searchManager = (SearchManager) activity.getSystemService(Context.SEARCH_SERVICE);

MyTracks/src/com/google/android/apps/mytracks/util/Api7Adapter.java

@@ -16,6 +16,7 @@
 package com.google.android.apps.mytracks.util;
 
 import com.google.android.apps.mytracks.Constants;
+import com.google.android.apps.mytracks.ContextualActionModeCallback;
 import com.google.android.apps.mytracks.io.backup.BackupPreferencesListener;
 import com.google.android.apps.mytracks.services.sensors.BluetoothConnectionManager;
 import com.google.android.apps.mytracks.services.tasks.PeriodicTask;
@@ -32,6 +33,7 @@ import android.content.SharedPreferences.Editor;
 import android.util.Log;
 import android.view.MenuItem;
 import android.view.Window;
+import android.widget.ListView;
 
 import java.io.IOException;
 import java.lang.reflect.InvocationTargetException;
@@ -113,6 +115,12 @@ public class Api7Adapter implements ApiAdapter {
     // Do nothing
   }
 
+  @Override
+  public void configureContextualMenu(Activity activity, ListView listView, int menuId,
+      ContextualActionModeCallback contextualActionModeCallback) {
+    activity.registerForContextMenu(listView);
+  }
+  
   @Override
   public void configureSearchWidget(Activity activity, MenuItem menuItem) {
     // Do nothing

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

@@ -15,6 +15,7 @@
  */
 package com.google.android.apps.mytracks.util;
 
+import com.google.android.apps.mytracks.ContextualActionModeCallback;
 import com.google.android.apps.mytracks.io.backup.BackupPreferencesListener;
 import com.google.android.apps.mytracks.services.tasks.PeriodicTask;
 import com.google.api.client.http.HttpTransport;
@@ -25,6 +26,7 @@ import android.bluetooth.BluetoothSocket;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.view.MenuItem;
+import android.widget.ListView;
 
 import java.io.IOException;
 
@@ -123,6 +125,20 @@ public interface ApiAdapter {
    */
   public void configureActionBarHomeAsUp(Activity activity);
 
+  /**
+   * Configures the context menu.
+   * <p>
+   * Due to changes in API level 11.
+   *
+   * @param activity the activity
+   * @param listView the list view
+   * @param menuId the menu resource id
+   * @param contextualActionModeCallback the callback when an item is selected
+   *          in the contextual action mode
+   */
+  public void configureContextualMenu(Activity activity, ListView listView, int menuId,
+      ContextualActionModeCallback contextualActionModeCallback);
+
   /**
    * Configures the search widget.
    *