Worked around JavaScript bridge exception for Android 2.3. Use "prompt" instead of calling objects directly. There were several objects called from JavaScript, including BrowserKey, so key events had to be reworked.

framework/assets/js/app.js

@@ -3,7 +3,7 @@
  * MIT License (2008). See http://opensource.org/licenses/alphabetical for full text.
  *
  * Copyright (c) 2005-2010, Nitobi Software Inc.
- * Copyright (c) 2010, IBM Corporation
+ * Copyright (c) 2010-2011, IBM Corporation
  */
 
 /**
@@ -63,3 +63,27 @@ App.prototype.clearHistory = function() {
 App.prototype.addService = function(serviceType, className) {
 	PhoneGap.exec(null, null, "App", "addService", [serviceType, className]);
 };
+
+/**
+ * Override the default behavior of the Android back button.
+ * If overridden, when the back button is pressed, the "backKeyDown" JavaScript event will be fired.
+ * 
+ * Note: The user should not have to call this method.  Instead, when the user
+ *       registers for the "backbutton" event, this is automatically done.
+ * 
+ * @param override		T=override, F=cancel override
+ */
+App.prototype.overrideBackbutton = function(override) {
+    PhoneGap.exec(null, null, "App", "overrideBackbutton", [override]);
+};
+
+/**
+ * Exit and terminate the application.
+ */
+App.prototype.exitApp = function() {
+	return PhoneGap.exec(null, null, "App", "exitApp", []);
+};
+
+PhoneGap.addConstructor(function() {
+    navigator.app = window.app = new App();
+});