Javascript call from WebView to Android and Vice Versa

[schildroid]

Good Day,

I have successfully executed this sample project using Eclipse, but i have this problem... When I add a simple button in the html file provided and attach an event to that button(I would like to call a javascript function), the javascript is not triggering.

Also, I tried to call a javascript function inside the BTWebView class at the OnActionItemClickListener whenever an item is clicked, calling a javascript using this: this.loadUrl("javascript: testFunction();"); but it's not triggering.

Hope to hear from you Soon.

[btate]

Wrap your javascript in a try catch block with the error method and see if anything prints.

try{ // Your Code } catch(err){ window.TextSelection.jsError(err); }

That should log an error in eclipse if there's a javascript error somewhere. Good place to start. Aside from that, send me an example of your html content/custom js and I'll try and take a look.

[schildroid]

Thanks for replying, I have done what you said but still does nothing.

Here's the OnActionItemClickListener with little changes.

mContextMenu.setOnActionItemClickListener(new QuickAction.OnActionItemClickListener() {
            
            public void onItemClick(QuickAction source, int pos,
                int actionId) {
                // TODO Auto-generated method stub
                if (actionId == 1) { 
                    // Do Button 1 stuff
                    Log.i(TAG, "Hit Button 1: ");
                    loadUrl("javascript: prom()"); // Here it is, I'm trying to call a javascript function on the html page provided
                } 
                else if (actionId == 2) { 
                    // Do Button 2 stuff
                    Log.i(TAG, "Hit Button 2");
                } 
                else if (actionId == 3) { 
                    // Do Button 3 stuff
                    Log.i(TAG, "Hit Button 3");
                }
                
                contextMenuVisible = false;
                    
            }
            
        });

No error is being displayed in my Eclipse log cat from a WebView Tag category. Still I did tried pressing the button but the javascript function in my page wont trigger.

Thanks in advance.

[anotherdave]

I just had this problem too. If you're building for Android API 17 or greater you need to add the @JavascriptInterface annotation to the methods in TextSelectionJavascriptInterface, otherwise they're not available to the webview and the javascript fails with "TypeError: Object [Object] has no method 'setContentWidth'".

[btate]

Thanks for that. I just updated the class on the master branch with the @JavascriptInterface annotation.

[anotherdave]

You're welcome, and thanks for the interesting demo.