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I am evaluating Gecko view by Mozilla as a potential Webview for displaying HTML pages in my android app. I want a callback mechanism where if Gecko view is unable to load the page, I should be able to fall back to Android's default Webview or Chrome custom tabs. I was looking into Gecko view's documentation here but I can't figure out if Gecko view provides such callbacks or not.

Is it possible to implement such behavior with Geckoview?

Manishearth
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Ezio
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2 Answers2

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There is a page progress session delegate with onPageStop which I believe is the same:

session.setProgressDelegate(new GeckoSession.ProgressDelegate() {
        @Override
        public void onPageStart(@NonNull @NotNull GeckoSession session, @NonNull @NotNull String url) {
            
        }

        @Override
        public void onPageStop(@NonNull @NotNull GeckoSession session, boolean success) {

        }
    });
Daniel Wilson
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Not sure if this is what you're looking for but NavigationDelegate has a onLoadError method that is called whenever the page could not be loaded: https://gv.dev/javadoc/mozilla-central/org/mozilla/geckoview/GeckoSession.NavigationDelegate.html#onLoadError-org.mozilla.geckoview.GeckoSession-java.lang.String-org.mozilla.geckoview.WebRequestError-

Example here: https://searchfox.org/mozilla-central/rev/2f29d53865cb895bf16c91336cc575aecd996a17/mobile/android/geckoview_example/src/main/java/org/mozilla/geckoview_example/GeckoViewActivity.java#1181-1190

Agi Sferro
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