Hi, Dan
The Javascript is already in memory (i.e. loaded by Webkit): I can
call functions/methods on that code from Java.
mWebView.loadUrl("file///android_assets/index.html"); // loads a bunch
of javascript.
The onPageFinished method runs, and the page is ready.
This javascript doesn't do anything except initialize itself and wire
up a few listeners/onclick type things.
I can verify that, by invoking a method on an JS object created in
global:
mWebView.loadUrl("javascript:mLoadedEarlier.method();");
It is not doing anything exotic e.g. setInterval() or tight looping.
Once I've done that, I'd like to add my newly minted javascript
interface - the Java object myAvailableOnlyLaterObject:
mWebView.addJavascriptInterface(myAvailableOnlyLaterObject,
"MyLateJavaObject");
Methods will be called on MyLateJavaObject in a click handler, i.e.
some time later. When the appointed time comes for the user to click,
triggering the call, the ReferenceError is reported.
Should I be able to do what I'm asking, and I'm doing it wrong? or am
I holding it wrong?
James
On Jan 20, 7:20 pm, Dan <[email protected]> wrote:
> James,
>
> Have you verified your JavaScript isn't already executed before this
> event occurs?
>
> -Dan
>
> On Jan 20, 9:43 am, jamesh <[email protected]> wrote:
>
> > Hi,
>
> > I'm trying to add Java objects to a WebView, such that they are
> > available to Javascript.
>
> > I can prove that if I do:
>
> > mWebView.addJavascriptInterface(myAvailableAtLoadTimeObject,
> > "MyJavaObject");
> > mWebView.load("file:///android_assets/index.html");
>
> > I can call methods from Javascript:
>
> > MyJavaObject.callableFunction(); // callableFunction is a Java method
> > on myAvailableAtLoadTimeObject.
>
> > or from Java:
> > mWebView.loadUrl("javascript:MyJavaObject.callableFunction();");
>
> > However, if WebViewClient.onPageFinished() has occurred, and then I
> > try:
>
> > mWebView.addJavascriptInterface(myAvailableOnlyLaterObject,
> > "MyLateJavaObject");
> > mWebView.loadUrl("javascript:MyLateJavaObject.callableFunction();");
>
> > I get an error reported from Javascript:
> > Uncaught ReferenceError: MyLateJavaObject is not defined
>
> > What am I missing, or doing wrong?
>
> > Thanks,
>
> > James
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