From 520ae87f14a5eb7cb2d6556a135e1a22727a874f Mon Sep 17 00:00:00 2001
From: Jimmy Shih <jshih@google.com>
Date: Tue, 30 Apr 2013 11:11:58 -0700
Subject: [PATCH] Add support for multiselect

---
 MyTracks/res/layout/list_item.xml             |   3 +-
 MyTracks/res/values-v11/styles.xml            |   3 +
 MyTracks/res/values/strings.xml               |  15 ++
 MyTracks/res/values/styles.xml                |   2 +
 .../ContextualActionModeCallback.java         |  28 +--
 .../apps/mytracks/MarkerListActivity.java     |  45 +++--
 .../apps/mytracks/SearchListActivity.java     |  64 ++++---
 .../apps/mytracks/TrackListActivity.java      |  49 +++---
 .../apps/mytracks/util/Api11Adapter.java      | 162 ++++++++++++++----
 9 files changed, 256 insertions(+), 115 deletions(-)

diff --git a/MyTracks/res/layout/list_item.xml b/MyTracks/res/layout/list_item.xml
index db23d2e07..8b320f752 100644
--- a/MyTracks/res/layout/list_item.xml
+++ b/MyTracks/res/layout/list_item.xml
@@ -22,7 +22,8 @@ limitations under the License.
   android:paddingRight="12dp"
   android:paddingTop="8dp"
   android:shrinkColumns="1"
-  android:stretchColumns="1" >
+  android:stretchColumns="1"
+  style="@style/ListItem" >
   <TableRow
     android:layout_height="wrap_content"
     android:layout_width="match_parent" >
diff --git a/MyTracks/res/values-v11/styles.xml b/MyTracks/res/values-v11/styles.xml
index 97ec9f98c..8cd65b2bb 100644
--- a/MyTracks/res/values-v11/styles.xml
+++ b/MyTracks/res/values-v11/styles.xml
@@ -29,6 +29,9 @@ limitations under the License.
     <item name="android:orientation">horizontal</item>
     <item name="android:measureWithLargestChild">true</item>
   </style>
+  <style name="ListItem">
+    <item name="android:background">?android:attr/activatedBackgroundIndicator</item>
+  </style>  
   <style name="MyTracksActionBar" parent="@android:style/Widget.Holo.ActionBar">
     <!-- Same image as the source except using a grey line instead of a blue line -->
     <item name="android:background">@drawable/ab_transparent_dark_holo</item>
diff --git a/MyTracks/res/values/strings.xml b/MyTracks/res/values/strings.xml
index 47f92693c..fd8561736 100644
--- a/MyTracks/res/values/strings.xml
+++ b/MyTracks/res/values/strings.xml
@@ -852,6 +852,21 @@ limitations under the License.
     Imported %1$s from %2$s.
   </string>
 
+  <!-- List item -->
+  <string name="list_deselect_all"
+    translation_description="Option to deselect all the items in a list.">
+    Deselect all
+  </string>
+  <string name="list_item_selected"
+    translation_description="Title indictating the number of items selected in a list.
+      %1$d: an integer value. E.g., '2'.">
+    %1$d selected
+  </string>
+  <string name="list_select_all"
+    translation_description="Option to select all the items in a list.">
+    Select all
+  </string>
+    
   <!-- Maps List -->
   <string name="maps_list_error"
     translation_description="When sending a track to an existing Google Map, the text on the Maps'
diff --git a/MyTracks/res/values/styles.xml b/MyTracks/res/values/styles.xml
index 07ebb8e61..3fa4ea8ad 100644
--- a/MyTracks/res/values/styles.xml
+++ b/MyTracks/res/values/styles.xml
@@ -101,6 +101,8 @@ limitations under the License.
     <item name="android:layout_gravity">center</item>
     <item name="android:padding">8dp</item>
   </style>
+  <!-- list item -->
+  <style name="ListItem" />
   <!-- list item date -->
   <style name="ListItemDate" parent="@style/TextSmall">
     <item name="android:gravity">right</item>
diff --git a/MyTracks/src/com/google/android/apps/mytracks/ContextualActionModeCallback.java b/MyTracks/src/com/google/android/apps/mytracks/ContextualActionModeCallback.java
index 1c4d22fcd..1e0df4c0d 100644
--- a/MyTracks/src/com/google/android/apps/mytracks/ContextualActionModeCallback.java
+++ b/MyTracks/src/com/google/android/apps/mytracks/ContextualActionModeCallback.java
@@ -19,27 +19,27 @@ package com.google.android.apps.mytracks;
 import android.view.Menu;
 
 /**
- * Callback when an item in the contextual action mode is selected.
+ * Callback when items in the contextual action mode are selected.
  * 
  * @author Jimmy Shih
  */
 public interface ContextualActionModeCallback {
 
   /**
-   * Invoked when an item is selected.
-   * 
-   * @param itemId the context menu item id
-   * @param position the position of the selected row
-   * @param id the id of the selected row, if available
-   */
-  public boolean onClick(int itemId, int position, long id);
-
-  /**
-   * Invoked to prepare the menu for the selected item.
+   * Invoked to prepare the menu for the selected items.
    * 
    * @param menu the menu
-   * @param position the position of the selected item
-   * @param id the id of the selected item
+   * @param positions the selected items' positions
+   * @param ids the selected items' ids, if available
    */
-  public void onPrepare(Menu menu, int position, long id);
+  public void onPrepare(Menu menu, int[] positions, long[] ids);
+
+  /**
+   * Invoked when items are selected.
+   * 
+   * @param itemId the context menu item id
+   * @param positions the selected items' positions
+   * @param ids the selected items' ids, if available
+   */
+  public boolean onClick(int itemId, int[] positions, long[] ids);
 }
\ No newline at end of file
diff --git a/MyTracks/src/com/google/android/apps/mytracks/MarkerListActivity.java b/MyTracks/src/com/google/android/apps/mytracks/MarkerListActivity.java
index 787516a88..3e4928492 100644
--- a/MyTracks/src/com/google/android/apps/mytracks/MarkerListActivity.java
+++ b/MyTracks/src/com/google/android/apps/mytracks/MarkerListActivity.java
@@ -69,15 +69,17 @@ public class MarkerListActivity extends AbstractMyTracksActivity implements Dele
   private ContextualActionModeCallback
       contextualActionModeCallback = new ContextualActionModeCallback() {
           @Override
-        public boolean onClick(int itemId, int position, long id) {
-          return handleContextItem(itemId, id);
+        public void onPrepare(Menu menu, int[] positions, long[] ids) {
+          menu.findItem(R.id.list_context_menu_share).setVisible(false);
+          menu.findItem(R.id.list_context_menu_show_on_map).setVisible(ids.length == 1);
+          menu.findItem(R.id.list_context_menu_edit)
+              .setVisible(ids.length == 1 && !track.isSharedWithMe());
+          menu.findItem(R.id.list_context_menu_delete).setVisible(!track.isSharedWithMe());
         }
 
-        public void onPrepare(Menu menu, int position, long id) {
-          menu.findItem(R.id.list_context_menu_share).setVisible(false);
-          menu.findItem(R.id.list_context_menu_show_on_map).setVisible(true);
-          menu.findItem(R.id.list_context_menu_edit).setVisible(!track.isSharedWithMe());
-          menu.findItem(R.id.list_context_menu_delete).setVisible(!track.isSharedWithMe());
+          @Override
+        public boolean onClick(int itemId, int[] positions, long[] ids) {
+          return handleContextItem(itemId, ids);
         }
       };
 
@@ -254,12 +256,15 @@ public class MarkerListActivity extends AbstractMyTracksActivity implements Dele
   public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
     super.onCreateContextMenu(menu, v, menuInfo);
     getMenuInflater().inflate(R.menu.list_context_menu, menu);
-    contextualActionModeCallback.onPrepare(menu, 0, 0);
+    
+    AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
+    contextualActionModeCallback.onPrepare(menu, new int[] {info.position}, new long[] {info.id});
   }
 
   @Override
   public boolean onContextItemSelected(MenuItem item) {
-    if (handleContextItem(item.getItemId(), ((AdapterContextMenuInfo) item.getMenuInfo()).id)) {
+    AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
+    if (handleContextItem(item.getItemId(), new long[] {info.id})) {
       return true;
     }
     return super.onContextItemSelected(item);
@@ -269,24 +274,28 @@ public class MarkerListActivity extends AbstractMyTracksActivity implements Dele
    * Handles a context item selection.
    * 
    * @param itemId the menu item id
-   * @param markerId the marker id
+   * @param markerIds the marker ids
    * @return true if handled.
    */
-  private boolean handleContextItem(int itemId, long markerId) {
+  private boolean handleContextItem(int itemId, long[] markerIds) {
     Intent intent;
     switch (itemId) {
       case R.id.list_context_menu_show_on_map:
-        intent = IntentUtils.newIntent(this, TrackDetailActivity.class)
-            .putExtra(TrackDetailActivity.EXTRA_MARKER_ID, markerId);
-        startActivity(intent);
+        if (markerIds.length == 1) {
+          intent = IntentUtils.newIntent(this, TrackDetailActivity.class)
+              .putExtra(TrackDetailActivity.EXTRA_MARKER_ID, markerIds[0]);
+          startActivity(intent);
+        }
         return true;
       case R.id.list_context_menu_edit:
-        intent = IntentUtils.newIntent(this, MarkerEditActivity.class)
-            .putExtra(MarkerEditActivity.EXTRA_MARKER_ID, markerId);
-        startActivity(intent);
+        if (markerIds.length == 1) {
+          intent = IntentUtils.newIntent(this, MarkerEditActivity.class)
+              .putExtra(MarkerEditActivity.EXTRA_MARKER_ID, markerIds[0]);
+          startActivity(intent);
+        }
         return true;
       case R.id.list_context_menu_delete:
-        DeleteMarkerDialogFragment.newInstance(new long[] { markerId })
+        DeleteMarkerDialogFragment.newInstance(markerIds)
             .show(getSupportFragmentManager(), DeleteMarkerDialogFragment.DELETE_MARKER_DIALOG_TAG);
         return true;
       default:
diff --git a/MyTracks/src/com/google/android/apps/mytracks/SearchListActivity.java b/MyTracks/src/com/google/android/apps/mytracks/SearchListActivity.java
index cc68a488a..4a14daf53 100644
--- a/MyTracks/src/com/google/android/apps/mytracks/SearchListActivity.java
+++ b/MyTracks/src/com/google/android/apps/mytracks/SearchListActivity.java
@@ -128,21 +128,32 @@ public class SearchListActivity extends AbstractSendToGoogleActivity
   private ContextualActionModeCallback
       contextualActionModeCallback = new ContextualActionModeCallback() {
           @Override
-        public boolean onClick(int itemId, int position, long id) {
-          return handleContextItem(itemId, position);
+        public boolean onClick(int itemId, int[] positions, long[] ids) {
+          return handleContextItem(itemId, positions);          
         }
-
-        public void onPrepare(Menu menu, int position, long id) {
-          Map<String, Object> item = arrayAdapter.getItem(position);
-          Long trackId = (Long) item.get(TRACK_ID_FIELD);
-          Long markerId = (Long) item.get(MARKER_ID_FIELD);
-          Track track = myTracksProviderUtils.getTrack(trackId);
+          @Override
+        public void onPrepare(Menu menu, int[] positions, long[] ids) {
+          boolean shareWithMe = true;
+          Long markerId = null;
+          if (positions.length == 1) {
+            Map<String, Object> item = arrayAdapter.getItem(positions[0]);
+            Long trackId = (Long) item.get(TRACK_ID_FIELD);            
+            Track track = myTracksProviderUtils.getTrack(trackId);
+            shareWithMe = track.isSharedWithMe();
+            markerId = (Long) item.get(MARKER_ID_FIELD);
+          }
+          // Only one item, the item is a track, and the item is not a sharedWithMe track
           menu.findItem(R.id.list_context_menu_share)
-              .setVisible(markerId == null && !track.isSharedWithMe());
-          menu.findItem(R.id.list_context_menu_show_on_map).setVisible(markerId != null);
-          menu.findItem(R.id.list_context_menu_edit).setVisible(!track.isSharedWithMe());
+              .setVisible(positions.length == 1 && markerId == null && !shareWithMe);
+          // Only one item, the item is a marker
+          menu.findItem(R.id.list_context_menu_show_on_map)
+              .setVisible(positions.length == 1 && markerId != null);
+          // Only one item, can be track or marker, but cannot be a sharedWithMe item
+          menu.findItem(R.id.list_context_menu_edit)
+              .setVisible(positions.length == 1 && !shareWithMe);
+          // Only one item. If marker, cannot be a shareWithMe item. If track, no restriction
           menu.findItem(R.id.list_context_menu_delete)
-              .setVisible(markerId == null || !track.isSharedWithMe());
+              .setVisible(positions.length == 1 && (markerId == null || !shareWithMe));
         }
       };
 
@@ -288,14 +299,14 @@ public class SearchListActivity extends AbstractSendToGoogleActivity
     super.onCreateContextMenu(menu, v, menuInfo);
     getMenuInflater().inflate(R.menu.list_context_menu, menu);
 
-    int position = ((AdapterContextMenuInfo) menuInfo).position;
-    contextualActionModeCallback.onPrepare(menu, position, 0);
+    AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
+    contextualActionModeCallback.onPrepare(menu, new int[] {info.position}, new long[] {info.id});
   }
 
   @Override
   public boolean onContextItemSelected(MenuItem item) {
-    AdapterContextMenuInfo adapterContextMenuInfo = (AdapterContextMenuInfo) item.getMenuInfo();
-    if (handleContextItem(item.getItemId(), adapterContextMenuInfo.position)) {
+    AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
+    if (handleContextItem(item.getItemId(), new int[] {info.position})) {
       return true;
     }
     return super.onContextItemSelected(item);
@@ -315,26 +326,24 @@ public class SearchListActivity extends AbstractSendToGoogleActivity
    * Handles a context item selection.
    * 
    * @param itemId the menu item id
-   * @param position the position of the selected row
+   * @param positions the positions of the selected rows
    * @return true if handled.
    */
-  private boolean handleContextItem(int itemId, int position) {
-    Map<String, Object> item = arrayAdapter.getItem(position);
+  private boolean handleContextItem(int itemId, int[] positions) {
+    if (positions.length != 1) {
+      return false;
+    }
+    Map<String, Object> item = arrayAdapter.getItem(positions[0]);
     Long trackId = (Long) item.get(TRACK_ID_FIELD);
     Long markerId = (Long) item.get(MARKER_ID_FIELD);
     Intent intent;
     switch (itemId) {
       case R.id.list_context_menu_share:
-        confirmShare(trackId);        
+        confirmShare(trackId);
         return true;
       case R.id.list_context_menu_show_on_map:
-        if (markerId != null) {
-          intent = IntentUtils.newIntent(this, TrackDetailActivity.class)
-              .putExtra(TrackDetailActivity.EXTRA_MARKER_ID, markerId);
-        } else {
-          intent = IntentUtils.newIntent(this, TrackDetailActivity.class)
-              .putExtra(TrackDetailActivity.EXTRA_TRACK_ID, trackId);
-        }
+        intent = IntentUtils.newIntent(this, TrackDetailActivity.class)
+            .putExtra(TrackDetailActivity.EXTRA_MARKER_ID, markerId);
         startActivity(intent);
         return true;
       case R.id.list_context_menu_edit:
@@ -346,6 +355,7 @@ public class SearchListActivity extends AbstractSendToGoogleActivity
               .putExtra(TrackEditActivity.EXTRA_TRACK_ID, trackId);
         }
         startActivity(intent);
+
         // Close the search result since its content can change after edit.
         finish();
         return true;
diff --git a/MyTracks/src/com/google/android/apps/mytracks/TrackListActivity.java b/MyTracks/src/com/google/android/apps/mytracks/TrackListActivity.java
index e4bd54c61..d9a54cd22 100644
--- a/MyTracks/src/com/google/android/apps/mytracks/TrackListActivity.java
+++ b/MyTracks/src/com/google/android/apps/mytracks/TrackListActivity.java
@@ -194,18 +194,24 @@ public class TrackListActivity extends AbstractSendToGoogleActivity
   // Callback when an item is selected in the contextual action mode
   private final ContextualActionModeCallback
       contextualActionModeCallback = new ContextualActionModeCallback() {
-          @Override
-        public boolean onClick(int itemId, int position, long id) {
-          return handleContextItem(itemId, id);
-        }
 
-        public void onPrepare(Menu menu, int position, long id) {
-          Track track = myTracksProviderUtils.getTrack(id);
-          menu.findItem(R.id.list_context_menu_share).setVisible(!track.isSharedWithMe());
+          @Override
+        public void onPrepare(Menu menu, int[] positions, long[] ids) {
+          boolean shareWithMe = true;
+          if (ids.length == 1) {
+            Track track = myTracksProviderUtils.getTrack(ids[0]);
+            shareWithMe = track.isSharedWithMe();
+          }
+          menu.findItem(R.id.list_context_menu_share).setVisible(!shareWithMe);
           menu.findItem(R.id.list_context_menu_show_on_map).setVisible(false);
-          menu.findItem(R.id.list_context_menu_edit).setVisible(!track.isSharedWithMe());
+          menu.findItem(R.id.list_context_menu_edit).setVisible(!shareWithMe);
           menu.findItem(R.id.list_context_menu_delete).setVisible(true);
         }
+
+          @Override
+        public boolean onClick(int itemId, int[] positions, long[] ids) {
+          return handleContextItem(itemId, ids);
+        };
       };
 
   private final OnClickListener recordListener = new OnClickListener() {
@@ -631,12 +637,16 @@ public class TrackListActivity extends AbstractSendToGoogleActivity
   public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
     super.onCreateContextMenu(menu, v, menuInfo);
     getMenuInflater().inflate(R.menu.list_context_menu, menu);
-    contextualActionModeCallback.onPrepare(menu, 0, ((AdapterContextMenuInfo) menuInfo).id);
+
+    AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
+    contextualActionModeCallback.onPrepare(
+        menu, new int[] { info.position }, new long[] { info.id });
   }
 
   @Override
   public boolean onContextItemSelected(MenuItem item) {
-    if (handleContextItem(item.getItemId(), ((AdapterContextMenuInfo) item.getMenuInfo()).id)) {
+    AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
+    if (handleContextItem(item.getItemId(), new long[] { info.id })) {
       return true;
     }
     return super.onContextItemSelected(item);
@@ -806,27 +816,22 @@ public class TrackListActivity extends AbstractSendToGoogleActivity
    * Handles a context item selection.
    * 
    * @param itemId the menu item id
-   * @param trackId the track id
+   * @param trackIds the track ids
    * @return true if handled.
    */
-  private boolean handleContextItem(int itemId, long trackId) {
-    Intent intent;
+  private boolean handleContextItem(int itemId, long[] trackIds) {
     switch (itemId) {
       case R.id.list_context_menu_share:
-        confirmShare(trackId);        
-        return true;
-      case R.id.list_context_menu_show_on_map:
-        intent = IntentUtils.newIntent(this, TrackDetailActivity.class)
-            .putExtra(TrackDetailActivity.EXTRA_TRACK_ID, trackId);
-        startActivity(intent);
+        confirmShare(trackIds[0]);
         return true;
       case R.id.list_context_menu_edit:
-        intent = IntentUtils.newIntent(this, TrackEditActivity.class)
-            .putExtra(TrackEditActivity.EXTRA_TRACK_ID, trackId);
+        Intent intent = IntentUtils.newIntent(this, TrackEditActivity.class)
+            .putExtra(TrackEditActivity.EXTRA_TRACK_ID, trackIds[0]);
         startActivity(intent);
         return true;
       case R.id.list_context_menu_delete:
-        DeleteTrackDialogFragment.newInstance(false, new long[] { trackId })
+        boolean deleteAll = listView.getCount() == trackIds.length;
+        DeleteTrackDialogFragment.newInstance(deleteAll, trackIds)
             .show(getSupportFragmentManager(), DeleteTrackDialogFragment.DELETE_TRACK_DIALOG_TAG);
         return true;
       default:
diff --git a/MyTracks/src/com/google/android/apps/mytracks/util/Api11Adapter.java b/MyTracks/src/com/google/android/apps/mytracks/util/Api11Adapter.java
index 227b29d80..ca139b388 100644
--- a/MyTracks/src/com/google/android/apps/mytracks/util/Api11Adapter.java
+++ b/MyTracks/src/com/google/android/apps/mytracks/util/Api11Adapter.java
@@ -23,17 +23,22 @@ import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.SearchManager;
 import android.content.Context;
+import android.util.SparseBooleanArray;
 import android.view.ActionMode;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AbsListView.MultiChoiceModeListener;
 import android.widget.AdapterView;
-import android.widget.AdapterView.OnItemLongClickListener;
+import android.widget.AdapterView.OnItemSelectedListener;
 import android.widget.ArrayAdapter;
 import android.widget.ListView;
 import android.widget.SearchView;
+import android.widget.Spinner;
 import android.widget.TextView;
 
+import java.util.ArrayList;
 import java.util.List;
 
 /**
@@ -55,51 +60,142 @@ public class Api11Adapter extends Api10Adapter {
   }
 
   @Override
-  public void configureListViewContextualMenu(final Activity activity, ListView listView,
+  public void configureListViewContextualMenu(final Activity activity, final ListView listView,
       final ContextualActionModeCallback contextualActionModeCallback) {
-    listView.setOnItemLongClickListener(new OnItemLongClickListener() {
-      ActionMode actionMode;
+    listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
+    listView.setMultiChoiceModeListener(new MultiChoiceModeListener() {
 
         @Override
-      public boolean onItemLongClick(
-          AdapterView<?> parent, View view, final int position, final long id) {
-        if (actionMode != null) {
-          return false;
-        }
-        actionMode = activity.startActionMode(new ActionMode.Callback() {
+      public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+        mode.getMenuInflater().inflate(R.menu.list_context_menu, menu);
+        final Spinner spinner = new Spinner(activity) {
             @Override
-          public boolean onCreateActionMode(ActionMode mode, Menu menu) {
-            mode.getMenuInflater().inflate(R.menu.list_context_menu, menu);
-            return true;
+          public void setSelection(int position) {
+            super.setSelection(position);
+            // Fire event when selecting the same item
+            if (position == getSelectedItemPosition()) {
+              getOnItemSelectedListener()
+                  .onItemSelected(this, getSelectedView(), position, getSelectedItemId());
+            }
           }
-
+        };
+        ArrayAdapter<StringBuilder> adapter = new ArrayAdapter<StringBuilder>(
+            activity, android.R.layout.simple_spinner_item,
+            new StringBuilder[] { new StringBuilder("") }) {
             @Override
-          public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
-            contextualActionModeCallback.onPrepare(menu, position, id);
-            // Return true to indicate change
-            return true;
-          }
-
+          public View getDropDownView(int position, View convertView, ViewGroup parent) {
+            // Display select all/ deselect all
+            View view = super.getDropDownView(position, convertView, parent);
+            TextView textView = (TextView) view;
+            int messageId = listView.getCheckedItemCount() == listView.getCount()
+                ? R.string.list_deselect_all
+                : R.string.list_select_all;
+            textView.setText(messageId);
+            return view;
+          };
+        };
+        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+        spinner.setAdapter(adapter);
+        
+        // Use a post to prevent the spinner item from firing when first created
+        spinner.post(new Runnable() {
             @Override
-          public void onDestroyActionMode(ActionMode mode) {
-            actionMode = null;
-          }
+          public void run() {
+            spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
+                @Override
+              public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+                // Handle select all/ deselect all
+                int size = listView.getCount();
+                boolean allSelected = listView.getCheckedItemCount() == size;
+                for (int i = 0; i < size; i++) {
+                  listView.setItemChecked(i, !allSelected);
+                }
+              }
 
-            @Override
-          public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
-            mode.finish();
-            return contextualActionModeCallback.onClick(item.getItemId(), position, id);
+                @Override
+              public void onNothingSelected(AdapterView<?> parent) {
+                // Do nothing
+              }
+            });
           }
         });
-        TextView textView = (TextView) view.findViewById(R.id.list_item_name);
-        if (textView != null) {
-          actionMode.setTitle(textView.getText());
-        }
-        view.setSelected(true);
+        mode.setCustomView(spinner);
+        setActionModeTitle(mode);
         return true;
       }
+
+        @Override
+      public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+        contextualActionModeCallback.onPrepare(
+            menu, getCheckedPositions(listView), listView.getCheckedItemIds());
+        return true;
+      }
+
+        @Override
+      public void onDestroyActionMode(ActionMode mode) {
+        // Do nothing
+      }
+
+        @SuppressWarnings("unchecked")
+        @Override
+      public void onItemCheckedStateChanged(
+          ActionMode mode, int position, long id, boolean checked) {
+        setActionModeTitle(mode);
+
+        // Update action mode title
+        Spinner spinner = (Spinner) mode.getCustomView();
+        ArrayAdapter<StringBuilder> adapter = (ArrayAdapter<StringBuilder>) spinner.getAdapter();
+        adapter.notifyDataSetChanged();
+
+        // Update contextual action mode items
+        mode.invalidate();
+      }
+
+        @Override
+      public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+        if (contextualActionModeCallback.onClick(
+            item.getItemId(), getCheckedPositions(listView), listView.getCheckedItemIds())) {
+          mode.finish();
+        }
+        return true;
+      }
+        
+      /**
+       * Sets the action mode title
+       * 
+       * @param mode action mode
+       */
+      private void setActionModeTitle(ActionMode mode) {
+        Spinner spinner = (Spinner) mode.getCustomView();
+        StringBuilder stringBuilder = (StringBuilder) spinner.getSelectedItem();
+        stringBuilder.delete(0, stringBuilder.length());
+
+        int count = listView.getCheckedItemCount();
+        stringBuilder.append(activity.getString(R.string.list_item_selected, count));
+      }
+      
+      /**
+       * Gets the checked positions in a list view.
+       * 
+       * @param list the list view
+       */
+      private int[] getCheckedPositions(ListView list) {
+        SparseBooleanArray positions  = list.getCheckedItemPositions();
+        ArrayList<Integer> arrayList = new ArrayList<Integer>();
+        for (int i = 0; i < positions.size(); i++) {
+          int key = positions.keyAt(i);
+          if (positions.valueAt(i)) {
+            arrayList.add(key);
+          }
+        }
+        int[] result = new int[arrayList.size()];
+        for (int i = 0; i < arrayList.size(); i++) {
+          result[i] = arrayList.get(i);
+        }
+        return result;
+      }
     });
-  };
+  }
 
   @Override
   public void configureSearchWidget(Activity activity, final MenuItem menuItem) {