WebView on Android ICS, iframe problems with android_assets

Question

My application engine runs inside a WebView. It spans different IFRAMES. Both the main application html and the iframes html are on android_assets. On Android 3.x no problems ever. Same on chrome browser, etc.

If I create an IFRAME (createElement -> appendChild) the iframe is created.

When I load stuff in it (iframe.src="url" <> iframe.contentWindow.location.href="url") ... IT REPLACES THE MAIN APPLICATION!! (instead of loading into iframe)

Already tried:

• window.setTimeout to delay the loading... failed.
• in webview, inject X-Frame-Options=SAME_ORIGIN as header into any loaded page -> failed
• creating the iframe, setting sandbox=same_origin,allow_scripts -> failed

Anybody with similar problems? Or can someone help me find documentation about WebView ICS bugs vs Honeycomb?

Also found many other strange issues... is ICS really this buggy? :S :S

Answer 1

Sirs, I had the same problem when using Phonegap (Apache Cordova) and IFrames in Android Ice Cream Sandwich (4.0.3).

To solve this problem, I had to edit Apache Cordova Source Code. I changed the org.apache.cordova.CordovaWebViewClient.java file, and commented this part of the code, and included the last line (return false;).

So it now looks like this:

    // All else     //        else {     //     //            // If our app or file:, then load into a new Cordova webview container by starting a new instance of our activity.     //            // Our app continues to run.  When BACK is pressed, our app is redisplayed.     //            if (url.startsWith("file://") || url.indexOf(this.ctx.baseUrl) == 0 || ctx.isUrlWhiteListed(url)) {     //                this.ctx.loadUrl(url);     //            }     //     //            // If not our application, let default viewer handle     //            else {     //                try {     //                    Intent intent = new Intent(Intent.ACTION_VIEW);     //                    intent.setData(Uri.parse(url));     //                    ctx.startActivity(intent);     //                } catch (android.content.ActivityNotFoundException e) {     //                    LOG.e(TAG, "Error loading url "+url, e);     //                }     //            }     //        }     //        return true;     return false; 

This problem only happens on Android ICS, but I changed the code for all my apps. I'm still doing tests.

In my analysis, it seems that when you try to load a page inside a iFrame, the Android WebView on ICS interprets it as a new page request, and IT REPLACES THE MAIN APPLICATION!!, or in other words, it OPENS the requested page in the hole parent window.

I left the rest of the code untouched.

I hope it helps, like it did for me.

Best regards.

Alexandre Almeida