Android: Injecting Javascript into a Webview outside the onPageFinished Event

Question

Hey experts, actually it's a pretty simple question...just don't know about the answer.

I have an Android app, running a WebView that loads a certain page, also part of the app.

At a given moment, i want to call a javascript function inside the WebView page, but i wanna do this outside the onPageFinished event.

Is that possible? Any ideas?

Thanks in advance.

CommonsWare · Accepted Answer · 2011-02-21 12:42:15Z

5

Is that possible?

Sure. Use loadUrl("javascript:...");, where the ... is whatever Javascript you wish to run in the context of the currently-loaded Web page. It's basically the same trick that bookmarklets use.

Here is a sample project demonstrating this, by pushing a GPS location over to Javascript.

answered Feb 21, 2011 at 12:42

CommonsWare

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4 Comments

Carlos Rendon Over a year ago

Look out for the fact that onpagefinished may fire several times for a given URL due to redirects.

TacB0sS Over a year ago

How can you be sure that the page has finished loading before running the script?

CommonsWare Over a year ago

@TacB0sS: As noted in the previous comment, use onPageFinished() on your WebViewClient.

TacB0sS Over a year ago

@CommonsWare, Thanks you for your help, I'm having a serious issue with the Android WebView and injecting the JavaScript at the onPageFinished... it seems like the onPageFinished call is been delayed: stackoverflow.com/questions/17995739/…

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