Service Worker in android Webview

[Umar Ali]

Hi,

       Recently I have been working on Webviews and found in chrome://inspect that if a webapp has Service Worker, it is shown as a separate webview in the inspect list. So my question is how do I get instance of that (Service Worker) webview so I can set its user-agent string and other settings.

P.S. I have to do this in Android M.

Thanks,

Umar Ali

[Tim Volodine]

For Android N and up, you can use ServiceWorkerController (and its settings) [1]. However I don't think we allow to set user agent on that.

For pre-N versions you can use AndroidX (support) library to get access to that api.

+cc:tobiasjs@ and ntfschr@ to potentially comment on AndroidX usage

[1] https://developer.android.com/reference/android/webkit/ServiceWorkerController

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[Torne (Richard Coles)]

Yeah there isn't a WebView for the service worker, you can only control it using ServiceWorkerController as Tim mentions. It only has a limited set of APIs right now and it currently controls *all* service workers without distinguishing between which site they belong to. If you need additional APIs to control service workers, we'd love to know what your specific use cases are (you mentioned the user agent, but also "other settings" - which settings?) - probably the best thing to do is file a bug against webview on crbug.com explaining more information and we can take it as a feature request.

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