Safe Browsing not working on Android

[Mitchell]

I tried  https://testsafebrowsing.appspot.com/ and the examples aren't blocked even with api keys set that work on desktop. Is there anything special I need to do since it seems it works for third party browsers like brave.

[Daniel Rubery]

By default, Android uses a different implementation of the Safe Browsing database: RemoteSafeBrowsingDatabaseManager instead of V4LocalDatabaseManager. That implementation depends on GMS so that multiple Android apps can share one set of Safe Browsing lists, and unfortunately has some Google-internal code involved. You'll need to provide your own implementation of SafeBrowsingApiHandler to replace the internal code.

I don't know much about Brave's implementation, but https://github.com/brave/brave-core/blob/master/components/safe_browsing/android/java/src/org/chromium/components/safe_browsing/BraveSafeBrowsingApiHandler.java certainly looks like a useful thing for you to look at.