diff --git a/demos/blockfactory/analytics.js b/demos/blockfactory/analytics.js
new file mode 100644
index 000000000..6473f8858
--- /dev/null
+++ b/demos/blockfactory/analytics.js
@@ -0,0 +1,210 @@
+/**
+ * @license
+ * Blockly Demos: Block Factory
+ *
+ * Copyright 2017 Google Inc.
+ * https://developers.google.com/blockly/
+ *
+ * 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.
+ */
+
+/**
+ * @fileoverview Stubbed interface functions for analytics integration.
+ */
+
+goog.provide('BlocklyDevTools.Analytics');
+
+/**
+ * Whether these stub methods should log analytics calls to the console.
+ * @private
+ * @const
+ */
+BlocklyDevTools.Analytics.LOG_TO_CONSOLE_ = false;
+
+/**
+ * An import/export type id for a library of BlockFactory's original block
+ * save files (each a serialized workspace of block definition blocks).
+ * @package
+ * @const
+ */
+BlocklyDevTools.Analytics.BLOCK_FACTORY_LIBRARY = "Block Factory library";
+/**
+ * An import/export type id for a standard Blockly library of block
+ * definitions.
+ * @package
+ * @const
+ */
+BlocklyDevTools.Analytics.BLOCK_DEFINITIONS = "Block definitions";
+/**
+ * An import/export type id for a code generation function, or a
+ * boilerplate stub of the same.
+ *
+ * @package
+ * @const
+ */
+BlocklyDevTools.Analytics.GENERATOR = "Generator";
+/**
+ * An import/export type id for a Blockly Toolbox.
+ *
+ * @package
+ * @const
+ */
+BlocklyDevTools.Analytics.TOOLBOX = "Toolbox";
+/**
+ * An import/export type id for the serialized contents of a workspace.
+ *
+ * @package
+ * @const
+ */
+BlocklyDevTools.Analytics.WORKSPACE_CONTENTS = "Workspace contents";
+
+/**
+ * Format id for imported/exported JavaScript resources.
+ *
+ * @package
+ * @const
+ */
+BlocklyDevTools.Analytics.FORMAT_JS = "JavaScript";
+/**
+ * Format id for imported/exported JSON resources.
+ *
+ * @package
+ * @const
+ */
+BlocklyDevTools.Analytics.FORMAT_JSON = "JSON";
+/**
+ * Format id for imported/exported XML resources.
+ *
+ * @package
+ * @const
+ */
+BlocklyDevTools.Analytics.FORMAT_XML = "XML";
+
+/**
+ * Platform id for resources exported for use in Android projects.
+ *
+ * @package
+ * @const
+ */
+BlocklyDevTools.Analytics.PLATFORM_ANDROID = "Android";
+/**
+ * Platform id for resources exported for use in iOS projects.
+ *
+ * @package
+ * @const
+ */
+BlocklyDevTools.Analytics.PLATFORM_IOS = "iOS";
+/**
+ * Platform id for resources exported for use in web projects.
+ *
+ * @package
+ * @const
+ */
+BlocklyDevTools.Analytics.PLATFORM_WEB = "web";
+
+/**
+ * Initializes the analytics framework, including noting that the page/app was
+ * opened.
+ * @package
+ */
+BlocklyDevTools.Analytics.init = function() {
+  // stub
+  this.LOG_TO_CONSOLE_ && console.log('Analytics.init');
+};
+
+/**
+ * Event noting the user navigated to a specific view.
+ *
+ * @package
+ * @param viewId {string} An identifier for the view state.
+ */
+BlocklyDevTools.Analytics.onNavigateTo = function(viewId) {
+  // stub
+  this.LOG_TO_CONSOLE_ &&
+      console.log('Analytics.onNavigateTo(' + viewId + ')');
+};
+
+/**
+ * Event noting a project resource was saved. In the web Block Factory, this
+ * means saved to localStorage.
+ *
+ * @package
+ * @param typeId {string} An identifying string for the saved type.
+ */
+BlocklyDevTools.Analytics.onSave = function(typeId) {
+  // stub
+  this.LOG_TO_CONSOLE_ && console.log('Analytics.onSave(' + typeId + ')');
+};
+
+/**
+ * Event noting the user attempted to import a resource file.
+ *
+ * @package
+ * @param typeId {string} An identifying string for the imported type.
+ * @param optMetadata {Object} Metadata about the import, such as format and
+ *                             platform.
+ */
+BlocklyDevTools.Analytics.onImport = function(typeId, optMetadata) {
+  // stub
+  this.LOG_TO_CONSOLE_ && console.log('Analytics.onImport(' + typeId +
+      (optMetadata ? '): ' + JSON.stringify(optMetadata) : ')'));
+};
+
+/**
+ * Event noting a project resource was saved. In the web Block Factory, this
+ * means downloaded to the user's system.
+ *
+ * @package
+ * @param typeId {string} An identifying string for the exported object type.
+ * @param optMetadata {Object} Metadata about the import, such as format and
+ *                             platform.
+ */
+BlocklyDevTools.Analytics.onExport = function(typeId, optMetadata) {
+  // stub
+  this.LOG_TO_CONSOLE_ && console.log('Analytics.onExport(' + typeId +
+      (optMetadata ? '): ' + JSON.stringify(optMetadata) : ')'));
+};
+
+/**
+ * Event noting the system encountered an error. It should attempt to send
+ * immediately.
+ *
+ * @package
+ * @param e {!Object} A value representing or describing the error.
+ */
+BlocklyDevTools.Analytics.onError = function(e) {
+  // stub
+  this.LOG_TO_CONSOLE_ &&
+      console.log('Analytics.onError("' + e.toString() + '")');
+};
+
+/**
+ * Event noting the user was notified with a warning.
+ *
+ * @package
+ * @param msg {string} The warning message, or a description thereof.
+ */
+BlocklyDevTools.Analytics.onWarning = function(msg) {
+  // stub
+  this.LOG_TO_CONSOLE_ && console.log('Analytics.onWarning("' + msg + '")');
+};
+
+/**
+ * Request the analytics framework to send any queued events to the server.
+ * @package
+ */
+BlocklyDevTools.Analytics.sendQueued = function() {
+  // stub
+  this.LOG_TO_CONSOLE_ && console.log('Analytics.sendQueued');
+};
+
diff --git a/demos/blockfactory/app_controller.js b/demos/blockfactory/app_controller.js
index ac69780b2..e3fc1bd23 100644
--- a/demos/blockfactory/app_controller.js
+++ b/demos/blockfactory/app_controller.js
@@ -28,6 +28,7 @@
 goog.provide('AppController');
 
 goog.require('BlockFactory');
+goog.require('BlocklyDevTools.Analytics');
 goog.require('FactoryUtils');
 goog.require('BlockLibraryController');
 goog.require('BlockExporterController');
@@ -85,6 +86,10 @@ AppController.prototype.importBlockLibraryFromFile = function() {
   var files = document.getElementById('files');
   // If the file list is empty, the user likely canceled in the dialog.
   if (files.files.length > 0) {
+    BlocklyDevTools.Analytics.onImport(
+        BlocklyDevTools.Analytics.BLOCK_FACTORY_LIBRARY,
+        { format: BlocklyDevTools.Analytics.FORMAT_XML });
+
     // The input tag doesn't have the "multiple" attribute
     // so the user can only choose 1 file.
     var file = files.files[0];
@@ -137,9 +142,14 @@ AppController.prototype.exportBlockLibraryToFile = function() {
   // Download file if all necessary parameters are provided.
   if (filename) {
     FactoryUtils.createAndDownloadFile(blockLibText, filename, 'xml');
+    BlocklyDevTools.Analytics.onExport(
+        BlocklyDevTools.Analytics.BLOCK_FACTORY_LIBRARY,
+        { format: BlocklyDevTools.Analytics.FORMAT_XML });
   } else {
-    alert('Could not export Block Library without file name under which to ' +
-      'save library.');
+    var msg = 'Could not export Block Library without file name under which ' +
+      'to save library.';
+    BlocklyDevTools.Analytics.onWarning(msg);
+    alert(msg);
   }
 };
 
@@ -201,7 +211,7 @@ AppController.prototype.formatBlockLibraryForImport_ = function(xmlText) {
     var blockType = this.getBlockTypeFromXml_(xmlText).toLowerCase();
     // Some names are invalid so fix them up.
     blockType = FactoryUtils.cleanBlockType(blockType);
-    
+
     blockXmlTextMap[blockType] = xmlText;
   }
 
@@ -285,13 +295,17 @@ AppController.prototype.onTab = function() {
 
     var hasUnsavedChanges =
         !FactoryUtils.savedBlockChanges(this.blockLibraryController);
-    if (hasUnsavedChanges &&
-        !confirm('You have unsaved changes in Block Factory.')) {
-      // If the user doesn't want to switch tabs with unsaved changes,
-      // stay on Block Factory Tab.
-      this.setSelected_(AppController.BLOCK_FACTORY);
-      this.lastSelectedTab = AppController.BLOCK_FACTORY;
-      return;
+    if (hasUnsavedChanges) {
+      var msg = 'You have unsaved changes in Block Factory.';
+      var continueAnyway = confirm(msg);
+      BlocklyDevTools.Analytics.onWarning(msg);
+      if (!continueAnyway) {
+        // If the user doesn't want to switch tabs with unsaved changes,
+        // stay on Block Factory Tab.
+        this.setSelected_(AppController.BLOCK_FACTORY);
+        this.lastSelectedTab = AppController.BLOCK_FACTORY;
+        return;
+      }
     }
   }
 
@@ -304,6 +318,8 @@ AppController.prototype.onTab = function() {
   this.styleTabs_();
 
   if (this.selectedTab == AppController.EXPORTER) {
+    BlocklyDevTools.Analytics.onNavigateTo('Exporter');
+
     // Hide other tabs.
     FactoryUtils.hide('workspaceFactoryContent');
     FactoryUtils.hide('blockFactoryContent');
@@ -325,6 +341,8 @@ AppController.prototype.onTab = function() {
     this.exporter.updatePreview();
 
   } else if (this.selectedTab ==  AppController.BLOCK_FACTORY) {
+    BlocklyDevTools.Analytics.onNavigateTo('BlockFactory');
+
     // Hide other tabs.
     FactoryUtils.hide('blockLibraryExporter');
     FactoryUtils.hide('workspaceFactoryContent');
@@ -332,6 +350,9 @@ AppController.prototype.onTab = function() {
     FactoryUtils.show('blockFactoryContent');
 
   } else if (this.selectedTab == AppController.WORKSPACE_FACTORY) {
+    // TODO: differentiate Workspace and Toolbox editor, based on the other tab state.
+    BlocklyDevTools.Analytics.onNavigateTo('WorkspaceFactory');
+
     // Hide other tabs.
     FactoryUtils.hide('blockLibraryExporter');
     FactoryUtils.hide('blockFactoryContent');
@@ -624,12 +645,14 @@ AppController.prototype.onresize = function(event) {
  * @param {!Event} e beforeunload event.
  */
 AppController.prototype.confirmLeavePage = function(e) {
+  BlocklyDevTools.Analytics.sendQueued();
   if ((!BlockFactory.isStarterBlock() &&
       !FactoryUtils.savedBlockChanges(blocklyFactory.blockLibraryController)) ||
       blocklyFactory.workspaceFactoryController.hasUnsavedChanges()) {
 
     var confirmationMessage = 'You will lose any unsaved changes. ' +
         'Are you sure you want to exit this page?';
+    BlocklyDevTools.Analytics.onWarning(confirmationMessage);
     e.returnValue = confirmationMessage;
     return confirmationMessage;
   }
diff --git a/demos/blockfactory/block_exporter_controller.js b/demos/blockfactory/block_exporter_controller.js
index b237f48a7..705de2667 100644
--- a/demos/blockfactory/block_exporter_controller.js
+++ b/demos/blockfactory/block_exporter_controller.js
@@ -31,6 +31,7 @@
 
 goog.provide('BlockExporterController');
 
+goog.require('BlocklyDevTools.Analytics');
 goog.require('FactoryUtils');
 goog.require('StandardCategories');
 goog.require('BlockExporterView');
@@ -103,7 +104,9 @@ BlockExporterController.prototype.export = function() {
     // User wants to export selected blocks' definitions.
     if (!blockDef_filename) {
       // User needs to enter filename.
-      alert('Please enter a filename for your block definition(s) download.');
+      var msg = 'Please enter a filename for your block definition(s) download.';
+      BlocklyDevTools.Analytics.onWarning(msg);
+      alert(msg);
     } else {
       // Get block definition code in the selected format for the blocks.
       var blockDefs = this.tools.getBlockDefinitions(blockXmlMap,
@@ -111,6 +114,13 @@ BlockExporterController.prototype.export = function() {
       // Download the file, using .js file ending for JSON or Javascript.
       FactoryUtils.createAndDownloadFile(
           blockDefs, blockDef_filename, 'javascript');
+      BlocklyDevTools.Analytics.onExport(
+          BlocklyDevTools.Analytics.BLOCK_DEFINITIONS,
+          {
+            format: (definitionFormat == 'JSON' ?
+                BlocklyDevTools.Analytics.FORMAT_JSON :
+                BlocklyDevTools.Analytics.FORMAT_JS)
+          });
     }
   }
 
@@ -118,7 +128,9 @@ BlockExporterController.prototype.export = function() {
     // User wants to export selected blocks' generator stubs.
     if (!generatorStub_filename) {
       // User needs to enter filename.
-      alert('Please enter a filename for your generator stub(s) download.');
+      var msg = 'Please enter a filename for your generator stub(s) download.';
+      BlocklyDevTools.Analytics.onWarning(msg);
+      alert(msg);
     } else {
       // Get generator stub code in the selected language for the blocks.
       var genStubs = this.tools.getGeneratorCode(blockXmlMap,
@@ -128,6 +140,10 @@ BlockExporterController.prototype.export = function() {
       // Download the file.
       FactoryUtils.createAndDownloadFile(
           genStubs, generatorStub_filename, fileType);
+      BlocklyDevTools.Analytics.onExport(
+          BlocklyDevTools.Analytics.GENERATOR,
+          (fileType == 'javascript' ?
+              { format: BlocklyDevTools.Analytics.FORMAT_JS } : undefined));
     }
   }
 
diff --git a/demos/blockfactory/block_library_controller.js b/demos/blockfactory/block_library_controller.js
index 1066ab127..b0e540489 100644
--- a/demos/blockfactory/block_library_controller.js
+++ b/demos/blockfactory/block_library_controller.js
@@ -34,6 +34,7 @@
 
 goog.provide('BlockLibraryController');
 
+goog.require('BlocklyDevTools.Analytics');
 goog.require('BlockLibraryStorage');
 goog.require('BlockLibraryView');
 goog.require('BlockFactory');
@@ -110,8 +111,9 @@ BlockLibraryController.prototype.getSelectedBlockType = function() {
  * updating the dropdown and displaying the starter block (factory_base).
  */
 BlockLibraryController.prototype.clearBlockLibrary = function() {
-  var check = confirm('Delete all blocks from library?');
-  if (check) {
+  var msg = 'Delete all blocks from library?';
+  BlocklyDevTools.Analytics.onWarning(msg);
+  if (confirm(msg)) {
     // Clear Block Library Storage.
     this.storage.clear();
     this.storage.saveToLocalStorage();
@@ -133,9 +135,11 @@ BlockLibraryController.prototype.saveToBlockLibrary = function() {
   // If user has not changed the name of the starter block.
   if (blockType == 'block_type') {
     // Do not save block if it has the default type, 'block_type'.
-    alert('You cannot save a block under the name "block_type". Try changing ' +
-        'the name before saving. Then, click on the "Block Library" button ' +
-        'to view your saved blocks.');
+    var msg = 'You cannot save a block under the name "block_type". Try ' +
+        'changing the name before saving. Then, click on the "Block Library"' +
+        ' button to view your saved blocks.';
+    alert(msg);
+    BlocklyDevTools.Analytics.onWarning(msg);
     return;
   }
 
@@ -159,6 +163,7 @@ BlockLibraryController.prototype.saveToBlockLibrary = function() {
 
   // Add select handler to the new option.
   this.addOptionSelectHandler(blockType);
+  BlocklyDevTools.Analytics.onSave('Block');
 };
 
 /**
diff --git a/demos/blockfactory/index.html b/demos/blockfactory/index.html
index 2b49f7ef2..9190bd132 100644
--- a/demos/blockfactory/index.html
+++ b/demos/blockfactory/index.html
@@ -9,6 +9,7 @@
   <script src="../../msg/js/en.js"></script>
   <script src="../../blocks_compressed.js"></script>
   <script src="../../../closure-library/closure/goog/base.js"></script>
+  <script src="analytics.js"></script>
   <script src="factory_utils.js"></script>
   <script src="workspacefactory/wfactory_model.js"></script>
   <script src="standard_categories.js"></script>
@@ -32,6 +33,8 @@
   <script>
     var blocklyFactory;
     var init = function() {
+      BlocklyDevTools.Analytics.init();
+
       blocklyFactory = new AppController();
       blocklyFactory.init();
       window.addEventListener('beforeunload', blocklyFactory.confirmLeavePage);
diff --git a/demos/blockfactory/workspacefactory/wfactory_controller.js b/demos/blockfactory/workspacefactory/wfactory_controller.js
index 5d80f4858..7516b0171 100644
--- a/demos/blockfactory/workspacefactory/wfactory_controller.js
+++ b/demos/blockfactory/workspacefactory/wfactory_controller.js
@@ -34,8 +34,9 @@
  * @author Emma Dauterman (evd2014)
  */
 
- goog.require('FactoryUtils');
- goog.require('StandardCategories');
+goog.require('BlocklyDevTools.Analytics');
+goog.require('FactoryUtils');
+goog.require('StandardCategories');
 
 
 /**
@@ -342,13 +343,25 @@ WorkspaceFactoryController.prototype.exportXmlFile = function(exportMode) {
     this.hasUnsavedPreloadChanges = false;
   } else {
     // Unknown mode. Throw error.
-    throw new Error ("Unknown export mode: " + exportMode);
+    var msg = "Unknown export mode: " + exportMode;
+    BlocklyDevTools.Analytics.onError(msg);
+    throw new Error(msg);
   }
 
   // Download file.
   var data = new Blob([configXml], {type: 'text/xml'});
   this.view.createAndDownloadFile(fileName, data);
- };
+
+  if (exportMode == WorkspaceFactoryController.MODE_TOOLBOX) {
+    BlocklyDevTools.Analytics.onExport(
+        BlocklyDevTools.Analytics.TOOLBOX,
+        { format: BlocklyDevTools.Analytics.FORMAT_XML });
+  } else if (exportMode == WorkspaceFactoryController.MODE_PRELOAD) {
+    BlocklyDevTools.Analytics.onExport(
+        BlocklyDevTools.Analytics.WORKSPACE_CONTENTS,
+        { format: BlocklyDevTools.Analytics.FORMAT_XML });
+  }
+};
 
 /**
  * Export the options object to be used for the Blockly inject call. Gets a
@@ -366,6 +379,13 @@ WorkspaceFactoryController.prototype.exportInjectFile = function() {
   var printableOptions = this.generator.generateInjectString()
   var data = new Blob([printableOptions], {type: 'text/javascript'});
   this.view.createAndDownloadFile(fileName, data);
+
+  BlocklyDevTools.Analytics.onExport(
+      BlocklyDevTools.Analytics.STARTER_CODE,
+      {
+        format: BlocklyDevTools.Analytics.FORMAT_JS,
+        platform: BlocklyDevTools.Analytics.PLATFORM_WEB
+      });
 };
 
 /**
@@ -729,33 +749,45 @@ WorkspaceFactoryController.prototype.importFile = function(file, importMode) {
         // Confirm that the user wants to override their current toolbox.
         var hasToolboxElements = controller.model.hasElements() ||
             controller.toolboxWorkspace.getAllBlocks().length > 0;
-        if (hasToolboxElements &&
-            !confirm('Are you sure you want to import? You will lose your ' +
-            'current toolbox.')) {
-            return;
+        if (hasToolboxElements) {
+            var msg = 'Are you sure you want to import? You will lose your ' +
+                'current toolbox.';
+            BlocklyDevTools.Analytics.onWarning(msg);
+            var continueAnyway = confirm();
+            if (!continueAnyway) {
+              return;
+            }
         }
         // Import toolbox XML.
         controller.importToolboxFromTree_(tree);
+        BlocklyDevTools.Analytics.onImport('Toolbox.xml');
 
       } else if (importMode == WorkspaceFactoryController.MODE_PRELOAD) {
         // Switch mode.
         controller.setMode(WorkspaceFactoryController.MODE_PRELOAD);
 
         // Confirm that the user wants to override their current blocks.
-        if (controller.toolboxWorkspace.getAllBlocks().length > 0 &&
-            !confirm('Are you sure you want to import? You will lose your ' +
-            'current workspace blocks.')) {
+        if (controller.toolboxWorkspace.getAllBlocks().length > 0) {
+          var msg = 'Are you sure you want to import? You will lose your ' +
+            'current workspace blocks.';
+          var continueAnyway = confirm(msg);
+          BlocklyDevTools.Analytics.onWarning(msg);
+          if (!continueAnyway) {
             return;
+          }
         }
 
         // Import pre-loaded workspace XML.
         controller.importPreloadFromTree_(tree);
+        BlocklyDevTools.Analytics.onImport('WorkspaceContents.xml');
       } else {
         // Throw error if invalid mode.
         throw new Error("Unknown import mode: " + importMode);
       }
     } catch(e) {
-      alert('Cannot load XML from file.');
+      var msg = 'Cannot load XML from file.';
+      alert(msg);
+      BlocklyDevTools.Analytics.onError(msg);
       console.log(e);
     } finally {
       Blockly.Events.enable();
@@ -888,8 +920,10 @@ WorkspaceFactoryController.prototype.importPreloadFromTree_ = function(tree) {
  * "Clear" button.
  */
 WorkspaceFactoryController.prototype.clearAll = function() {
-  if (!confirm('Are you sure you want to clear all of your work in Workspace' +
-      ' Factory?')) {
+  var msg = 'Are you sure you want to clear all of your work in Workspace' +
+      ' Factory?';
+  BlocklyDevTools.Analytics.onWarning(msg);
+  if (!confirm(msg)) {
     return;
   }
   var hasCategories = this.model.hasElements();
@@ -1213,11 +1247,15 @@ WorkspaceFactoryController.prototype.importBlocks = function(file, format) {
 
       // If an imported block type is already defined, check if the user wants
       // to override the current block definition.
-      if (controller.model.hasDefinedBlockTypes(blockTypes) &&
-          !confirm('An imported block uses the same name as a block '
+      if (controller.model.hasDefinedBlockTypes(blockTypes)) {
+        var msg = 'An imported block uses the same name as a block '
           + 'already in your toolbox. Are you sure you want to override the '
-          + 'currently defined block?')) {
+          + 'currently defined block?';
+        var continueAnyway = confirm(msg);
+        BlocklyDevTools.Analytics.onWarning(msg);
+        if (!continueAnyway) {
           return;
+        }
       }
 
       var blocks = controller.generator.getDefinedBlocks(blockTypes);
@@ -1234,8 +1272,13 @@ WorkspaceFactoryController.prototype.importBlocks = function(file, format) {
       // Reload current category to possibly reflect any newly defined blocks.
       controller.clearAndLoadXml_
           (Blockly.Xml.workspaceToDom(controller.toolboxWorkspace));
+
+      BlocklyDevTools.Analytics.onImport('BlockDefinitions' +
+          (format == 'JSON' ? '.json' : '.js'));
     } catch (e) {
-      alert('Cannot read blocks from file.');
+      msg = 'Cannot read blocks from file.';
+      alert(msg);
+      BlocklyDevTools.Analytics.onError(msg);
       window.console.log(e);
     }
   }