clear toga webview cache for android

[Jzhenli]

Hi, how to clear toga webview cache for android, I have checked the toga doc, but find no topic about this.

[freakboy3742]

There is no public Toga API for this at present. It would make sense to add an API for this, but we'd need to investigate how (and even if) it could be done.

[Jzhenli]

Android has a API clearCache, not sure if it could be called by the toga. @freakboy3742

[freakboy3742]

If the method exists on the native API, it can be invoked. In this instance, you should be able to call mywebview._impl.native.clearCache(True). That won't be cross platform, as it's touching a native API; but you can put an if toga.current_platform == 'android' check around the call.

If we can find an analogous cache flush mechanism on other platforms, we could wrap this up as a cross-platform API.

[Jzhenli]

Thanks, the following code works well.
if toga.platform.current_platform == "android": loading_view._impl.native.clearCache(True)