TWA - Digital Asset Link OK but address bar still visible

I developed a Progressive Web App and I want to publish it in the Play Store as a Trusted Web Activity. It's https://www.bagnoadriatico.it

Following this guide https://developers.google.com/web/updates/2019/02/using-twa

I downloaded the example from https://github.com/GoogleChromeLabs/svgomg-twa

I changed the configuration with

def twaManifest = [
    applicationId: 'com.simovinci.bagnoadriatico',
    hostName: 'www.bagnoadriatico.it', // The domain being opened in the TWA.
    launchUrl: '/mobile', // The start path for the TWA. Must be relative to the domain.
    name: 'BagnoAdriatico di Casalborsetti', // The name shown on the Android Launcher.
    themeColor: '#ff5c14', // The color used for the status bar.
    backgroundColor: '#ffff00' // The color used for the splash screen background.
]

then I signed the apk, build and published on play store.

In the website I created the association by Digital Asset Link https://www.bagnoadriatico.it/.well-known/assetlinks.json The "Statement List Generator and Tester" say that the operation was successful "Success! Host www.bagnoadriatico.it grants app deep linking to com.simovinci.bagnoadriatico." https://developers.google.com/digital-asset-links/tools/generator

The Address bar still visible, I don't know why.

https://www.bagnoadriatico.it/mobile returns a 200 http code. The PWA is 100% Lighthouse validated. The key finger print is right

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I tried to set launchUrl = "/" (before I removed the 302 to mobile version) but nothing changed. The address bar is still visible.

Solution

If you have used app signing by Google Play, your SHA 256 changes. The fix is to download your app from the Play Store and then generate a new assetlinks.json file by using the following tool also from the Play Store:

https://play.google.com/store/apps/details?id=dev.conn.assetlinkstool&hl=en