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/src/com/phonegap/DroidGap.java

@@ -3,11 +3,12 @@
  * 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
  */
 package com.phonegap;
 
 import org.json.JSONArray;
+import org.json.JSONException;
 import android.app.AlertDialog;
 import android.content.Context;
 import android.content.DialogInterface;
@@ -26,6 +27,7 @@ import android.view.Window;
 import android.view.WindowManager;
 import android.webkit.JsResult;
 import android.webkit.WebChromeClient;
+import android.webkit.JsPromptResult;
 import android.webkit.WebSettings;
 import android.webkit.WebStorage;
 import android.webkit.WebView;
@@ -110,7 +112,7 @@ public class DroidGap extends PhonegapActivity {
 	protected WebViewClient webViewClient;
 
 	private LinearLayout root;
-	private BrowserKey mKey;
+	boolean bound = false;
 	public CallbackServer callbackServer;
 	protected PluginManager pluginManager;
 	protected boolean cancelLoadUrl = false;
@@ -267,12 +269,6 @@ public class DroidGap extends PhonegapActivity {
 	private void bindBrowser(WebView appView) {
 		this.callbackServer = new CallbackServer();
 		this.pluginManager = new PluginManager(appView, this);
-		this.mKey = new BrowserKey(appView, this);
-
-		// This creates the new javascript interfaces for PhoneGap
-		appView.addJavascriptInterface(this.pluginManager, "PluginManager");
-		appView.addJavascriptInterface(this.mKey, "BackButton");
-		appView.addJavascriptInterface(this.callbackServer, "CallbackServer");
 
 		this.addService("App", "com.phonegap.App");
 		this.addService("Geolocation", "com.phonegap.GeoBroker");
@@ -659,10 +655,6 @@ public class DroidGap extends PhonegapActivity {
     	// Load blank page so that JavaScript onunload is called
        	this.appView.loadUrl("about:blank");
     	    	
-    	// Clean up objects
-    	if (this.mKey != null) {
-    	}
-    	
         // Forward to plugins
         this.pluginManager.onDestroy();
 
@@ -764,6 +756,69 @@ public class DroidGap extends PhonegapActivity {
             return true;
         }
 
+        /**
+         * Tell the client to display a prompt dialog to the user. 
+         * If the client returns true, WebView will assume that the client will 
+         * handle the prompt dialog and call the appropriate JsPromptResult method.
+         * 
+         * @param view
+         * @param url
+         * @param message
+         * @param defaultValue
+         * @param result
+         */
+        @Override
+        public boolean onJsPrompt(WebView view, String url, String message, String defaultValue, JsPromptResult result) {
+			
+        	// Calling PluginManager.exec() to call a native service using 
+        	// prompt(this.stringify(args), "gap:"+this.stringify([service, action, callbackId, true]));
+        	if (defaultValue.substring(0, 4).equals("gap:")) {
+        		JSONArray array;
+        		try {
+        			array = new JSONArray(defaultValue.substring(4));
+        			String service = array.getString(0);
+        			String action = array.getString(1);
+        			String callbackId = array.getString(2);
+        			boolean async = array.getBoolean(3);
+        			String r = pluginManager.exec(service, action, callbackId, message, async);
+        			result.confirm(r);
+        		} catch (JSONException e) {
+        			e.printStackTrace();
+        		}
+        	}
+        	
+        	// Polling for JavaScript messages 
+        	else if (defaultValue.equals("gap_poll:")) {
+        		String r = callbackServer.getJavascript();
+        		result.confirm(r);
+        	}
+        	
+        	// Calling into CallbackServer
+        	else if (defaultValue.equals("gap_callbackServer:")) {
+        		String r = "";
+        		if (message.equals("usePolling")) {
+        			r = ""+callbackServer.usePolling();
+        		}
+        		else if (message.equals("restartServer")) {
+        			callbackServer.restartServer();
+        		}
+        		else if (message.equals("getPort")) {
+        			r = Integer.toString(callbackServer.getPort());
+        		}
+        		else if (message.equals("getToken")) {
+        			r = callbackServer.getToken();
+        		}
+        		result.confirm(r);
+        	}
+        	
+        	// Show dialog
+        	else {
+        		//@TODO:
+        		result.confirm("");
+        	}
+        	return true;
+        }
+
     }
 
     /**
@@ -1016,8 +1071,8 @@ public class DroidGap extends PhonegapActivity {
     	if (keyCode == KeyEvent.KEYCODE_BACK) {
 
     		// If back key is bound, then send event to JavaScript
-    		if (mKey.isBound()) {
-    			this.appView.loadUrl("javascript:document.keyEvent.backTrigger()");
+    		if (this.bound) {
+    			this.appView.loadUrl("javascript:PhoneGap.fireEvent('backbutton');");
     		}
 
     		// If not bound
@@ -1037,12 +1092,12 @@ public class DroidGap extends PhonegapActivity {
 
     	// If menu key
     	else if (keyCode == KeyEvent.KEYCODE_MENU) {
-    		appView.loadUrl("javascript:keyEvent.menuTrigger()");
+    		this.appView.loadUrl("javascript:PhoneGap.fireEvent('menubutton');");
     	}
 
     	// If search key
     	else if (keyCode == KeyEvent.KEYCODE_SEARCH) {
-    		appView.loadUrl("javascript:keyEvent.searchTrigger()");
+    		this.appView.loadUrl("javascript:PhoneGap.fireEvent('searchbutton');");
     	}
 
     	return false;