Opening Downloaded HTML Files

[l-k22]

Hello, I have an epub which is downloaded to the user's device, the HTML files are extracted into a folder within the applications directory. The examples provided only refer to files being located inside the assets folder. How can I display files downloaded elsewhere?

Thanks.

[pichillilorenzo]

To get files outside an App, you can use the path_provider plugin and then call the getExternalStorageDirectory function. You get the HTML string of the file and then call openData method (available from version 0.5.5 of my plugin) in case you are using the InAppBrowser class or use the initialData property (available from version 0.5.5 of my plugin) for the InAppWebView widget.
The problem is that this will work only on Android. Like said in the docs of the getExternalStorageDirectory function:

Path to a directory where the application may access top level storage. The current operating system should be determined before issuing this function call, as this functionality is only available on Android.

On iOS, this function throws an UnsupportedError as it is not possible to access outside the app's sandbox.

On Android this returns getExternalStorageDirectory.

On iOS you can't access outside the app's sandbox!

So, you need a way to put the file that you want show in the App "directory" in order to make it work in a cross-platform way.

[l-k22]

Okay thank you for the quick reply. I am using the getApplicationDocumentsDirectory() so all files are downloaded into com.exampleapp/app_flutter/ebooks/book1/*

I realized that my issue was layout overflow which prevented any of the content from displaying.
Scrolling feels very sluggish though.

[pichillilorenzo]

Ok!

Scrolling feels very sluggish though.

I think that happens because, like said in the AndroidView documentation:

Embedding Android views is an expensive operation and should be avoided when a Flutter equivalent is possible.

The support for Android native views is not full stable yet unfortunately.

[l-k22]

Yeh still early days unfortunately. Thank you for your hard work

[l-k22]

Could I ask for a feature request? I'm trying to figure out this myself but it's beyond my knowledge. Would it be possible to add the ability to restrict web content to the height of the container then override the swipe gesture used for back and forward to act as the next page of the split content, similar to an ebook?

thanks

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